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1,837,866 | Result Pattern | The use of exceptions in C# is basically okay, but you should be careful not to use too many... | 0 | 2024-06-11T08:00:00 | https://dev.to/ben-witt/result-pattern-5290 | microsoft, dotnet, csharp, coding | > The use of exceptions in C# is basically okay, but you should be careful not to use too many exceptions. If exceptions are constantly used for all possibilities, the code can become slow and inefficient. These exceptions are actually meant to be used when something unexpected happens or the normal program is messed up. It would be good to use these exceptions only for such special cases so that the code remains efficient. Sometimes other methods such as return values or special error codes are better to make things faster and smoother.
> This is exactly where this article comes in, to show an alternative, how it can be done “differently”! (but it doesn’t have to!! 😉, as is so often the case in IT, it depends….)
**The problem:**
In C#, an exception is often thrown to report error states. Like this, for example:
```
public int Divide(int numerator, int denominator)
{
if (denominator == 0)
{
throw new Exception("Division by zero is not allowed.");
}
if (denominator == 1)
{
throw new Exception("Division by 1 always results in the dividend.");
}
return numerator / denominator;
}
```
The challenge is that exceptions are thrown when errors occur in this method, which often leads to suboptimal efficiency. This is largely due to the additional tasks involved in throwing exceptions, which can lead to slowdowns.
These can be:
**Performance aspects:** Raising an exception requires additional resources to activate the exception mechanism and process the exception. Compared to other methods, this process can be more time-consuming.
**Stack manipulation:** When exceptions are thrown, the stack must be searched to find the appropriate catch block. This process can cause additional overhead.
**Interruption of the control flow:** Raising an exception leads to an interruption of the normal control flow of the application. This can lead to inefficient code, especially when exceptions are used to handle normal conditions or errors that are not considered “exceptional”.
**Design principles:** Exceptions should typically be reserved for “exceptional and unpredictable events”. Throwing exceptions for normal program control can lead to a suboptimal design and affect the readability of the code.
The “Result Pattern” is an alternative to exception-based error handling. Instead of triggering exceptions, a special result object is returned that contains the success or failure of an operation as well as error information. This allows the normal program flow to run more smoothly. Developers can check the result object and react appropriately, resulting in clearer and more predictable error handling in the code.
## The Result-Objekt:
The Result pattern introduces its own result type, which represents the success or failure of an operation. This can be represented by a generic class:
```
public class Result<TValue,TError>
{
public readonly TValue? Value;
public readonly TError? Error;
private bool _isSuccess;
private Result(TValue value)
{
_isSuccess = true;
value = value;
error = default;
}
private Result(TError error)
{
_isSuccess = false;
value = default;
error = error;
}
//happy path
public static implicit operator Result<TValue, TError>(TValue value) => new Result<TValue, TError>(value);
//error path
public static implicit operator Result<TValue, TError> (TError error)=> new Result<TValue, TError>(error);
public Result<TValue, TError> Match(Func<TValue, Result<TValue, TError>> success, Func<TError, Result<TValue, TError>> failure)
{
if (_isSuccess)
{
return success(Value!);
}
return failure(Error!);
}
}
```
This code defines a generic class called Result. The class has two generic types, TValue for the success value and TError for the error value.
- The class has public fields Value and Error, which hold either the success value or the error value. There is also a private field _isSuccess, which indicates whether the operation was successful.
- There are two private constructors, one for the success path (_isSuccess is true) and one for the error path (_isSuccess is false).
- The class also contains two static methods (implicit operator) that allow an instance of the class to be created by passing either a success value or an error value.
- The Match method accepts two functions, success and failure, and depending on whether the operation was successful or not, the corresponding function is called.
- In summary, this class is used to represent the success or failure of an operation in a application and provides mechanisms to deal with both cases.
These implicit operators allow instances of the Result class to be created in a compact way, depending on whether a success value or an error value is passed. The implicit keyword means that the conversion takes place automatically without the developer having to explicitly write a conversion expression.
## Creating the error type
The success value of an operation is kept generic, as the expected value should not be defined here. Of course, you could also define a success value type here, but this would have no added value.
The situation is different for the error value, where an error object can be created which can be used to transport the error.
This is because an error object usually consists of an error code and a message that describes the respective error.
To do this, it is sufficient to create a record which we seal.
```
public sealed record Error(string Code, string? Message = null);
```
This gives us an error type that can contain any error code and the corresponding error message.
We can now use this error type in our result type.
**Defining error objects:**
One advantage of the Result Pattern is the readability of the code.
In this example, we are implementing a mathematical operation, the division. Within this context, we emphasize that division by zero is not allowed. To this end, we will return an error as the result.
Furthermore, we specify that a division by 1 is also erroneous.
To do this, we create a static class that only contains error objects for division, which has the advantage that the code remains very easy to read.
```
public static class DivedErrors
{
public static readonly Error DivisionByZero = new("Dived.DivisionByZero",
"Division by zero is not allowed.");
public static readonly Error DivisionByOne = new("Dived.DivisionByOne",
"Division by 1 always results in the dividend.");
}
```
**Use of the result pattern:**
Now we can change the method (from The problem) for the division using the Result pattern:
By using the implicit operator from the Result object, we don’t even need a conversion anymore, but can directly throw a specific error.
```
public Result<int, Error> Divide(int numerator, int denominator)
{
if (denominator == 0)
{
return DivedErrors.DivisionByZero;
}
if (denominator == 1)
{
return DivedErrors.DivisionByOne;
}
int result = numerator / denominator;
return result;
}
```
This makes the code very clear and easy to read.
In this example, the code is straightforward, but I think you can imagine that with code that is “longer”, this advantage becomes much clearer.
**Use of pattern matching:**
The Match method in this Result<TValue, TError> is used to react to a value of the Result type based on the success or error status of the Result object.
The method checks the internal status (_isSuccess) of the Result object. If the status is set to success (true), the success function is called and the result is returned. Otherwise, the failure function is called and the result is returned.
Pattern matching is thus implemented and evaluated in the caller:
```
var divisionResult = mathOperation.Divide(numerator, denominator);
var rslt = divisionResult.Match(
resultValue => resultValue,
error => error);
if (rslt.Error != null)
{
Console.WriteLine(rslt.Error.Message);
}
else
{
Console.WriteLine(rslt.Value);
}
```
**Advantages of the Result Pattern:**
- Explicit error handling: Developers have to consciously deal with success or failure.
- Clear readability: Code becomes more readable as deeply nested try-catch blocks can be avoided.
- Performance improvement: Avoiding exceptions can improve performance.
- Extended use:
- Extended use:
- Combine result types: You can combine the Result type for complex scenarios, e.g. if you need error details.
- Creation of auxiliary methods: Auxiliary methods can be created to facilitate the use of the result pattern.
**Conclusion:**
The Result Pattern in C# provides a structured method for dealing with errors. It promotes clearer code and allows developers to more precisely control how they want to handle error conditions without resorting to the expense of exceptions. It is particularly useful in situations where errors are expected and an exception-based approach would be inefficient.
The performance benefits of the Result pattern compared to using exceptions can be particularly evident in situations where errors occur relatively frequently. Here are some reasons why the Result Pattern is often considered to be more performant:
**Cost of exceptions:** Throwing and catching exceptions is a resource-intensive operation. When an exception is thrown, the CLR (Common Language Runtime) must traverse the caller stack to find the appropriate exception handling block. This can lead to a noticeable overhead, especially if exceptions occur frequently.
**Control flow:** The result pattern enables a clearer control flow in the code. With exceptions, the normal program flow is interrupted by the throwing and catching of exceptions. This can lead to higher overhead, especially if the control flow constantly switches between normal and exception states.
Avoidance of unnecessary stack tracing:
When using the Result pattern, the control flow is controlled by the if and else statements without throwing an exception. This reduces the need for stack tracing, which can lead to better performance.
**Predictability:** The Result Pattern allows for more accurate prediction of program flow. Developers can better estimate which parts of the code will run successfully and which parts may contain errors. This is important for the writeability and maintainability of the code.
**Easier optimization:** The code that uses the Result Pattern can often be optimized more easily. Compilers can generate simpler machine code if the control flow is clearer. This can lead to better runtime performance.
**Asynchronous programming:** In asynchronous scenarios, the use of exceptions can lead to complex problems. The result pattern can offer a clearer and more performant solution here.
**Benchmarking and profiling:** In scenarios where performance is critical, it is advisable to use benchmarking and profiling tools. These can provide more accurate insights into the runtime performance of the code and help to identify bottlenecks.
**Combination with other techniques:** The Result Pattern can be combined with other techniques such as caching and memoization to further improve performance.
It is important to note that the performance gains from using the Result Pattern may not be dramatic in all situations. In many cases, modern JIT compilers and hardware can mitigate the effects of exceptions. However, it is advisable to consider the specific requirements and characteristics of a project and perform appropriate tests and measurements to determine the optimal approach. | ben-witt |
1,883,664 | Mastering Embedded Analytics: A Getting Started Guide 📊 | TL;DR This article will walk you through all the information you need about embedded... | 0 | 2024-06-11T09:12:13 | https://blog.latitude.so/mastering-embedded-analytics-guide/ | webdev, javascript, programming, opensource | ## **TL;DR**
This article will walk you through all the information you need about embedded analytics and [**Latitude**](https://tools.latitude.so/), including how to use Latitude to visualize your data, with a detailed guide.
## **Overview of Embedded Analytics**
At this point, you may want to know what **embedded analytics** is. It refers to integrating data visualization into software or a web application. Instead of viewing data as numbers or as disorganized, there are different ways to display data in an organized way and embed it in an application.
Modern technologies like charting libraries, web components, APIs, and SDKs have made data visualization seamless. An alternative to visualizing your data could be using an underlying technology, but it could be challenging to achieve compared to emerging technologies such as the ones mentioned earlier.
Modern charting tools provide users with pre-built components that make them easy to work with. While using these tools, you only need to provide raw data to work with in most cases. This makes it easy to include your data visualization in your application.
**ICYMI**: We published an article a couple of weeks ago on the [**best chart libraries to use in 2024**](https://blog.latitude.so/7-best-chart-libraries-developers-2024/). It's best to read that article if you are looking for a chart library to work with. I've included in the article comprehensive details about the best charting libraries to work with according to your needs.
By the way, I'm a part of Latitude's team, and it would mean a lot if you could check out our open-source framework for embedded analytics and [**give us a star on GitHub**](https://github.com/latitude-dev/latitude).
We're working to provide a better developer experience, and all support is appreciated!
[**Star Latitude on GitHub ⭐️**](https://github.com/latitude-dev/latitude)
Okay, now - let's get back at it! 😉
## **Key Concepts of Embedded Analytics**
* **Real-time data access**: Embedded analytics often provide access to real-time data. This lets users view analytics based on the most current data available. While doing this, you must know that this is a dynamic way of rendering analytics.
* **Customization**: Most embedded analytics tools come with various pre-built components. You can customize the analytics tailored to your needs with the help of pre-built themes or custom styling. These tools also let you include features you want in your analytics. With the help of customization, you can display your analytics with the features or style you want to embed.
* **Integration with databases and host applications**: Embedded analytics tools let you work directly with databases and host applications as data sources. While data could be rendered dynamically, many of these tools render data differently, just as various technologies are used for database management.
* **Focus on User Experience**: This is the primary purpose of embedded analytics; it focuses on how data can be visualized in the best way for users. Providing great functionality in analytics helps users understand the context of the analysis.
There are tons of things embedded analytics could be used for. Embedding analytics works in hands with your data, but you may be wondering what its purpose is. For instance, you see a dashboard that displays the usage stats in an application as a chart—an example of embedded analytics integrated into that application. Different tools for visualizing data have various methods of sourcing data.
## **Getting Started with Latitude**
There are different tools available for embedding analytics into your application. One option is [**Latitude**](https://tools.latitude.so/), an open-source framework that allows you to build and embed interactive analytics based on your database or data warehouse.
With Latitude, you only need to write composable SQL queries with custom parameters to pull data and transform it into analytics on your front end. The framework works with **Svelte** for the front end; with the pre-built components Latitude provides, you can include your components as attributes to display your analytics.
### **How Latitude Works**
Latitude works with two major things: your **database** or **data warehouse** and your **front end**, with the help of the created database. Additionally, data can be displayed statically using CSV files. By doing this, there's no need to worry about anything apart from creating SQL queries.
Latitude isn't limited to using Svelte alone for the front end; you can also integrate Latitude into your **React** application. All you need to do after configuring the parameters is include them in the components for the data you have to display.
With Latitude, you're on the right path to embedding your analytics into your application.
## **Prerequisites for getting started with Latitude**
* Basic knowledge of SQL.
* `npm >= 8.5.5` or higher installed on your local development machine.
* Vast knowledge of React or Svelte.
* Basic knowledge of CSS frameworks such as Tailwind for styling.
Away from the hype, Latitude is one tool you will love to try out because of its accessibility! To start with Latitude, you must install Latitude's CLI on your local machine. The command below will install Latitude's CLI globally on your local machine.
```xml
npm install -g @latitude-data/cli
```
After installing the CLI, you need to create your Latitude project. You can only configure your **queries** and **views** by creating a project in Latitude. Use the command below to create a Latitude project.
```xml
latitude start
```
This is where your actual journey of building with Latitude begins. When you run the command, you should input the project name when requested and select the type of project, whether a prebuilt project (DuckDB + CSV demo) or an empty project from scratch.
By doing that, you have your project created locally. Afterward, `cd` into the project name. After doing this, you can execute the `code .` command to work on the project from your IDE. From here, you need to understand Latitude's project structure.
---
### **Project structure**
Before working on any project, you need to understand its structure, the functionalities of each path, and the file in every path.
In Latitude, there are two significant directories: `queries` and `views`. But before going into that, here is the project structure of a Latitude project:
```xml
project-name/
├── queries/
├── views/
```
These are the only two paths to work with. In these paths, you will find files. The `queries` directory contains a configuration file, `source.yml,` and SQL queries. Although, when you create a project from scratch, you won't find any query files. You will have to create your query files.
Also, you can add your CSV file to the queries directory if you like. In this context, fundamental knowledge of SQL or other query languages is best. `queries` in Latitude can be regarded as the **data source** displayed in the embedded analytics.
For the `views` path, it controls the entire front end. You will find an HTML file in that directory that works with Svelte. In that file, you interact with your queries using parameters configured in your queries.
---
Now, we need to start working on queries. I will use [this CSV file](https://gist.githubusercontent.com/rioto9858/ff72b72b3bf5754d29dd1ebf898fc893/raw/1164a139a780b0826faef36c865da65f2d3573e0/top50MusicFrom2010-2019.csv), Top 50 Spotify Music from 2010 to 2019, as the data source in this guide. You could download the file and keep it on your `query` path.
The next thing to do is set up your queries. This is where your SQL knowledge will be beneficial. Create a file in the same `queries` directory to capture your data source. You can use the query snippet below:
```xml
select title,
artist,
genre,
music_year,
BeatsPerMinute,
from read_csv_auto('queries/spotify.csv')
order by music_year asc
```
The code snippet above shows that the only fields to extract data are the title, artist, genre, music\_year, and BeatsPerMinute fields from the CSV file. Toward the end of the snippet, the sixth line specifies the CSV file from which to pull data.
After doing this, you need another query to sum up your data. To do this, you can give the file a suitable name for an aggregated query file. In this case, I’ll name the query file `firstcomp.sql`.
```xml
select
music_year,
count(*) as all_titles,
from { ref('first') }
group by 1
order by 1 asc
```
In the query above, the `music_year` field from the CSV file was selected, and then the primary query file, `first.sql` , was referenced `first`. It indicates that data should be grouped differently and in ascending order.
To **verify** if your data was extracted correctly, you will have to run the query above using Latitude's CLI with this command:
```xml
latitude run second_filename
```
By doing that, this should be your result:
If you get something like this, you're on the right path. After verifying your queries and data source, the next thing to do is work on how the data should be displayed.
Now, let's navigate to the `views/` directory to set the front end for the analytics we want to display.
Unlike the `queries/` path, where we have to work with multiple files, we will work with `index.html` alone. You can add this snippet to your HTML code:
```xml
<svelte:head>
<title>Demo project</title>
</svelte:head>
<View class="gap-8 p-8">
<Row>
<Text.H2 class="font-bold">Top 50 Spotify music dataset (2010 to 2019)</Text.H2>
</Row>
<Row>
<LineChart
query="firstagg"
x="music_year"
y="title"
/>
</Row>
<Row>
<Table query="first" />
</Row>
</View>
```
As you can see in the code above, it works with Svelte. Now, we aim to display analytics with the components available. The `LineChart` component was used because we wanted to display our data as a line chart. Afterward, we added values to the components to work with the parameters in the query files. I also added a table to work with the primary query file.
When you have that code in your `index.html` file, you can now run the project using this command:
```xml
latitude dev
```
By doing this, you'll be redirected to [**localhost:3000**](http://localhost:3000/) from your terminal. Then, you should have this view on your browser displaying your data analytics.
You can embed your analytics into any website using React or HTML. If you are familiar with React, [**this documentation**](https://docs.latitude.so/react/getting-started/introduction) will guide you on embedding your analytics application with React.
To embed this in any application, you must ensure your Latitude application is deployed on **Latitude Cloud**.
To deploy your application, you need to sign up for Latitude Cloud.
```xml
latitude signup
```
If you have an existing Latitude Cloud account, you can log in to access it.
```xml
latitude login
```
After doing this, you can deploy your application by running the command below.
```xml
latitude deploy
```
Congratulations! You have your Latitude application deployed. 🎉
Now that we have our Latitude application deployed, the last thing to do is embed the analytics in our Latitude into another website. You can use the **iframe embedding** technique if you're not using React.
This could be done in three ways, depending on what you want to achieve by embedding. It could be embedded directly using parameters in the iframe's value or passing signed parameters.
To embed your analytics directly, you can put this iframe in your code:
```xml
<iframe src="https://app-url.latitude.so/" width="100%" height="400"></iframe>
```
In this context, you need to replace the source, `https://app-url.latitude.so/`, with the actual URL of your deployed application. The iframe code above helps embed your entire analytics into your web application.
That is the easiest way to embed analytics into your application, literally. You can learn about the other methods; [**passing parameters**](https://docs.latitude.so/guides/embed/iframe#passing-parameters) and [**passing signed parameters**](https://docs.latitude.so/views/basics/signed-parameters).
As much as there are tons of tools for visualizing data and embedding analytics into your application, Latitude makes this look very easy. It's not false hype, but the developer experience of Latitude is what makes it a great tool to use. Imagine connecting your data to your front end to integrate analytics into your application seamlessly - it's something you want to try out.
You can learn more about Latitude by going through [**Latitude's documentation**](https://docs.latitude.so/). There are a series of guides that can walk you through everything about Latitude.
## **Conclusion**
This article transitioned from embedded analytics to how you can get started with it easily using Latitude. If you don't understand how to use any embedded analytics tool, Latitude is one you can try out because of its seamlessness and developer experience.
Note that Latitude can be used with React or Svelte. Either way, they’re both great ways to use Latitude.
### **Support us 🙏 ⭐️**
Latitude is open-source; you can contribute to the project as we want to make it more seamless for developers. If you love the project, you can go ahead and give it a star; we appreciate it!
[**Star Latitude on GitHub ⭐️**](https://github.com/latitude-dev/latitude)
I hope you got the best out of this article. I look forward to hearing your thoughts about using Latitude for your embedded analytics in the comment section. I can't wait to have you read my next article. 👋 | coderoflagos |
1,884,174 | How to Add Owl Carousel in Your Next.js Project | Carasoul don’t have a good reputation as a web element from UX point of view. Still its a vital... | 0 | 2024-06-11T09:11:18 | https://dev.to/fazlay/how-to-add-owl-carousel-in-your-nextjs-project-1oo5 | webdev, javascript, nextjs, uidesign |
Carasoul don’t have a good reputation as a web element from UX point of view. Still its a vital element in modern web appearance. Almost all the web sites have it in some form of representation. Weather it is used as a offer promoter of review slider. As it is a very common element in web we can’t use default ones to make us unique. For customizing [Owl Caousel](https://owlcarousel2.github.io/OwlCarousel2/) has a good reputation over the time because of its flexibility. But Add this in Next.js have some caveat due to next’s SSR or SSG functionality. We cannot use [react owl carousel](https://www.npmjs.com/package/react-owl-carousel) directly beacause of next js default behaviour. In this tutorial we will discuss how can we over come this.
### Step 1: Install Owl Carousel Package
Here we have used react owl carousel which is based on owl carousel 2.
To begin, you'll need to install the react owl carousel package. Open your terminal and run the following command to install it using npm:
```jsx
npm install react-owl-carousel
//for yarn react owl carousel
yarn add react-owl-carousel
```
### Step 2: Import Owl Carousel Files
Once the package is installed, you need to import the necessary Owl Carousel CSS and JavaScript files into your Next.js project. In the file where you want to use the carousel, add the following code at the top:
```jsx
import "owl.carousel/dist/assets/owl.carousel.css";
import "owl.carousel/dist/assets/owl.theme.default.css";
```
### Step 3: Import Owl Carousel React component
```tsx
if (typeof window !== "undefined") {
window.$ = window.jQuery = require("jquery");
}
import dynamic from "next/dynamic";
const OwlCarousel = dynamic(() => import("react-owl-carousel"), {
ssr: false,
});
```
### Step 3: Set up Compoent
Now we need to call the OwlCarousel Component in the component to render the slider. here Options are the config for owlcaraousel.
```jsx
<OwlCarousel className="" {...options}>
//{..content or silides}
<OwlCarousel />
```
For this example my config was below
```jsx
const options = {
animateIn: "animate__fadeIn",
animateOut: "animate__slideOutDown",
margin: 30,
//stagePadding: 30,
smartSpeed: 450,
items: 1,
loop: true,
};
```
### Step 4: initialize jquery
we missed one step that initialize jquery. We need to initialize jquery before any code.
```jsx
import React from "react";
var $ = require("jquery");
declare global {
interface Window {
$: any;
jQuery: any;
}
}
if (typeof window !== "undefined") {
window.$ = window.jQuery = require("jquery");
}
```
### Step 5: Customize and Style
One of the great things about Owl Carousel is the ability to customize and style your carousel to match your project's requirements. You can define the number of items to display, add navigation buttons, autoplay, and more. Take a look at the Owl Carousel documentation for a complete list of available options and configurations.
### Step 6: Enjoy the Carousel!
Congratulations! You have successfully added Owl Carousel to your Next.js project. Now it's time to have some fun and start adding content, images, and customizing the carousel according to your needs. Let your creativity shine!
### Final Thoughts
Before wrapping up, it's important to thoroughly test your carousel and make any necessary adjustments to ensure it fits seamlessly into your project. Remember, the goal is to create a beautiful and interactive user experience. To make owl caousel responsive you need to add media query or other css properties
So go ahead and enhance your Next.js project with the captivating Owl Carousel and impress your users with stunning visuals and smooth navigation. Happy coding!
<aside>
💡 Feel free to contact me via [Fiverr](https://www.fiverr.com/cardhacker/develop-custom-wordpress-plugin-with-react-js) or [Linkden](https://www.linkedin.com/in/fazlay0rabbi/)
</aside> | fazlay |
1,884,176 | Perfect Your Pizzas with Top-Quality Pizza Baking Machines | screenshot-1717821713705.png How to Improve Your Pizza-Making with Pizza Baking Machines Are you... | 0 | 2024-06-11T09:10:24 | https://dev.to/daniel_rahnket_3442df0a4e/perfect-your-pizzas-with-top-quality-pizza-baking-machines-3lji | des |
screenshot-1717821713705.png
How to Improve Your Pizza-Making with Pizza Baking Machines
Are you tired of burned or unevenly cooked pizzas? Do you want to make perfect, delicious pizzas every time? Luckily, you don't have to hire a professional chef or upgrade to a fancy oven to improve the quality of your pizzas. Pizza baking machines are the answer! we'll explore the advantages of using pizza baking ELECTRIC IMPINGEMENT OVEN machines, different types of innovation in pizza making technology, how to use them safely, the best ways to use them, quality of service and support, and application in diverse outlets.
Options that come with Pizza Baking Machines
Pizza baking machines products provide a few benefits over old-fashioned ovens:
Consistent Temperature: One of this biggest features of pizza baking devices would be which they guarantee also cooking and persistence
It truly is hard to consistently have the perfect heat with conventional ovens, especially if you’re maybe not an cook like specialist
That's where pizza baking devices can be bought in
They keep carefully the temperature like same the cooking procedure, providing you pizza cooked to perfection every time
Quicker time like Pizza like cooking baking cook pizzas faster than conventional ovens
The reason being they get hotter than conventional ovens
You are able to cook your pizza at a higher heat than usual, enabling you to prepare pizzas which can be great
Great outcomes each time: By having a pizza baking device, you're very possible to get results which can be great time
It gives you a possibility like control like great pizza-making at every phase
You are able to adjust the heat, humidity, as well as other settings to really make the pizza like correct
Different sorts of Innovation in Pizza Making Technology
Pizza baking machines offer many advanced functions, including size like compact electronic control panels, and convection cooking
Some devices utilize advanced heating elements to rapidly prepare pizzas without drying them out
Other people are created specifically to produce crusts that are high-quality while still others are well suited to creating pizzas that are deep-dish
Whatever kind of pizza you may well be envisioning, there's a pizza-making device which will help you'll completely be rendering it
Quality of Service and Support
When investing in a pizza baking machine like electric impingement oven, you'll want to glance at the DECK OVEN quality of solution and you will receive should you proceed through any pressing issues or need repairs
Reputable businesses provide warranties regarding the services and products and supply support to greatly assist straighten any conditions out that may arise
Application:
Locations To Use Pizza Baking Machines
Pizza baking devices are extremely versatile, and so they may be used in various settings
They could never be only appropriate house use but in addition usage like commercial
Below are a few related to outlets you can make use of pizza baking machines in:
Restaurants: Pizza baking devices are perfect for restaurants, catering for large sets of individuals
They could allow you to create pizzas that are many faster manufacturing prices with similar quality like top
Food Trucks: Pizza baking machines are portable sufficient to be utilized in meals vehicles
They've been excellent for organizations being frequently on the road and require a option like reliable make quality pizzas
Sports Parties: Pizza baking machines are ideal for sports parties, providing for many people in a amount like brief of
In Conclusion
If you are serious about improving your pizza-making abilities, pizza baking machines are a must-have. They offer consistent temperature, faster cooking time, and top-quality GAS IMPINGEMENT OVEN service and support. Additionally, you can experiment with different recipes and use them in diverse applications, from restaurants to food trucks and sports parties. With a little practice, you can become the pizza master you always wanted to be.
| daniel_rahnket_3442df0a4e |
1,884,175 | Hybrid Cloud Topology Service Controller | The "Topology Service Controller" in a cloud environment typically refers to a component within a... | 0 | 2024-06-11T09:09:53 | https://dev.to/paihari/hybrid-cloud-topology-service-controller-2eca | cloud, infrastructureascode | The "**Topology Service Controller**" in a cloud environment typically refers to a component within a cloud infrastructure that manages and controls the topology of the services running within the cloud. This can include various tasks such as:
**Service Discovery and Registry:** Keeping track of all services running in the cloud, including their status, locations, and interdependencies.
**Network Management:** Managing the network topology, including routing, load balancing, and ensuring optimal communication paths between services.
**Scaling and Resilience:** Monitoring the health of services and automatically scaling them up or down based on demand, as well as handling failover and redundancy to ensure high availability.
**Configuration Management:** Managing and distributing the configuration of services across the cloud environment, ensuring consistency and correctness.
**Monitoring and Logging:** Collecting and analyzing metrics and logs from services to monitor performance, detect issues, and enable troubleshooting. | paihari |
1,884,173 | If Apple made the same product as you, would you still need to stick around? | We saw today's WWDC, Apple has updated many products, some of which will obviously replace the... | 0 | 2024-06-11T09:07:43 | https://dev.to/viggoz/if-apple-made-the-same-product-as-you-would-you-still-need-to-stick-around-44j4 | wwdc, wwdc24 | We saw today's WWDC, Apple has updated many products, some of which will obviously replace the products of some start-up companies. What do you think about this?
I also made a DarkOS Icon Pack, which is somewhat similar to the latest iOS18 custom theme. Do I still need to continue publishing it?
Here is my link: https://darkosicon.com | viggoz |
1,884,172 | JavaScript version SuperTrend strategy | There are many versions of the SuperTrend indicator on the TV. I found a relatively... | 0 | 2024-06-11T09:06:37 | https://dev.to/fmzquant/javascript-version-supertrend-strategy-7aj | javascript, supertrend, cryptocurrency, fmzquant | There are many versions of the SuperTrend indicator on the TV. I found a relatively easy-to-understand algorithm and transplanted it. Compared with the SuperTrend indicator loaded on the TV chart of FMZ trading platform backtest system, I found a slight difference and did not understand the reason for the causes, I'm looking forward to the guidance of our readers. I will first show my understanding as follow.
## SuperTrend indicator JavaScript version algorithm
```
// VIA: https://github.com/freqtrade/freqtrade-strategies/issues/30
function SuperTrend(r, period, multiplier) {
// atr
var atr = talib.ATR(r, period)
// baseUp , baseDown
var baseUp = []
var baseDown = []
for (var i = 0; i < r.length; i++) {
if (isNaN(atr[i])) {
baseUp.push(NaN)
baseDown.push(NaN)
continue
}
baseUp.push((r[i].High + r[i].Low) / 2 + multiplier * atr[i])
baseDown.push((r[i].High + r[i].Low) / 2 - multiplier * atr[i])
}
// fiUp , fiDown
var fiUp = []
var fiDown = []
var prevFiUp = 0
var prevFiDown = 0
for (var i = 0; i < r.length; i++) {
if (isNaN(baseUp[i])) {
fiUp.push(NaN)
} else {
fiUp.push(baseUp[i] < prevFiUp || r[i - 1].Close > prevFiUp ? baseUp[i] : prevFiUp)
prevFiUp = fiUp[i]
}
if (isNaN(baseDown[i])) {
fiDown.push(NaN)
} else {
fiDown.push(baseDown[i] > prevFiDown || r[i - 1].Close < prevFiDown ? baseDown[i] : prevFiDown)
prevFiDown = fiDown[i]
}
}
var st = []
var prevSt = NaN
for (var i = 0; i < r.length; i++) {
if (i < period) {
st.push(NaN)
continue
}
var nowSt = 0
if (((isNaN(prevSt) && isNaN(fiUp[i - 1])) || prevSt == fiUp[i - 1]) && r[i].Close <= fiUp[i]) {
nowSt = fiUp[i]
} else if (((isNaN(prevSt) && isNaN(fiUp[i - 1])) || prevSt == fiUp[i - 1]) && r[i].Close > fiUp[i]) {
nowSt = fiDown[i]
} else if (((isNaN(prevSt) && isNaN(fiDown[i - 1])) || prevSt == fiDown[i - 1]) && r[i].Close >= fiDown[i]) {
nowSt = fiDown[i]
} else if (((isNaN(prevSt) && isNaN(fiDown[i - 1])) || prevSt == fiDown[i - 1]) && r[i].Close < fiDown[i]) {
nowSt = fiUp[i]
}
st.push(nowSt)
prevSt = st[i]
}
var up = []
var down = []
for (var i = 0; i < r.length; i++) {
if (isNaN(st[i])) {
up.push(st[i])
down.push(st[i])
}
if (r[i].Close < st[i]) {
down.push(st[i])
up.push(NaN)
} else {
down.push(NaN)
up.push(st[i])
}
}
return [up, down]
}
// The main function for testing indicators is not a trading strategy
function main() {
while (1) {
var r = _C(exchange.GetRecords)
var st = SuperTrend(r, 10, 3)
$.PlotRecords(r, "K")
$.PlotLine("L", st[0][st[0].length - 2], r[r.length - 2].Time)
$.PlotLine("S", st[1][st[1].length - 2], r[r.length - 2].Time)
Sleep(2000)
}
}
```
Test code backtest comparison:
## A simple strategy using SuperTrend indicator
The trading logic part is relatively simple, that is, when the short trend turns into a long trend, long positions are opened.
Open a short position when the long trend turns into a short trend.
Strategy parameters:
SuperTrend trading strategy
```
/*backtest
start: 2019-08-01 00:00:00
end: 2020-03-11 00:00:00
period: 15m
basePeriod: 5m
exchanges: [{"eid":"Futures_OKCoin","currency":"BTC_USD"}]
*/
// Global variables
var OpenAmount = 0 // The number of open positions after opening
var KeepAmount = 0 // Reserved position
var IDLE = 0
var LONG = 1
var SHORT = 2
var COVERLONG = 3
var COVERSHORT = 4
var COVERLONG_PART = 5
var COVERSHORT_PART = 6
var OPENLONG = 7
var OPENSHORT = 8
var State = IDLE
// Trading logic part
function GetPosition(posType) {
var positions = _C(exchange.GetPosition)
/*
if(positions.length > 1){
throw "positions error:" + JSON.stringify(positions)
}
*/
var count = 0
for(var j = 0; j < positions.length; j++){
if(positions[j].ContractType == Symbol){
count++
}
}
if(count > 1){
throw "positions error:" + JSON.stringify(positions)
}
for (var i = 0; i < positions.length; i++) {
if (positions[i].ContractType == Symbol && positions[i].Type === posType) {
return [positions[i].Price, positions[i].Amount];
}
}
Sleep(TradeInterval);
return [0, 0]
}
function CancelPendingOrders() {
while (true) {
var orders = _C(exchange.GetOrders)
for (var i = 0; i < orders.length; i++) {
exchange.CancelOrder(orders[i].Id);
Sleep(TradeInterval);
}
if (orders.length === 0) {
break;
}
}
}
function Trade(Type, Price, Amount, CurrPos, OnePriceTick){ // Processing transactions
if(Type == OPENLONG || Type == OPENSHORT){ // Handling open positions
exchange.SetDirection(Type == OPENLONG ? "buy" : "sell")
var pfnOpen = Type == OPENLONG ? exchange.Buy : exchange.Sell
var idOpen = pfnOpen(Price, Amount, CurrPos, OnePriceTick, Type)
Sleep(TradeInterval)
if(idOpen) {
exchange.CancelOrder(idOpen)
} else {
CancelPendingOrders()
}
} else if(Type == COVERLONG || Type == COVERSHORT){ // Deal with closing positions
exchange.SetDirection(Type == COVERLONG ? "closebuy" : "closesell")
var pfnCover = Type == COVERLONG ? exchange.Sell : exchange.Buy
var idCover = pfnCover(Price, Amount, CurrPos, OnePriceTick, Type)
Sleep(TradeInterval)
if(idCover){
exchange.CancelOrder(idCover)
} else {
CancelPendingOrders()
}
} else {
throw "Type error:" + Type
}
}
function SuperTrend(r, period, multiplier) {
// atr
var atr = talib.ATR(r, period)
// baseUp , baseDown
var baseUp = []
var baseDown = []
for (var i = 0; i < r.length; i++) {
if (isNaN(atr[i])) {
baseUp.push(NaN)
baseDown.push(NaN)
continue
}
baseUp.push((r[i].High + r[i].Low) / 2 + multiplier * atr[i])
baseDown.push((r[i].High + r[i].Low) / 2 - multiplier * atr[i])
}
// fiUp , fiDown
var fiUp = []
var fiDown = []
var prevFiUp = 0
var prevFiDown = 0
for (var i = 0; i < r.length; i++) {
if (isNaN(baseUp[i])) {
fiUp.push(NaN)
} else {
fiUp.push(baseUp[i] < prevFiUp || r[i - 1].Close > prevFiUp ? baseUp[i] : prevFiUp)
prevFiUp = fiUp[i]
}
if (isNaN(baseDown[i])) {
fiDown.push(NaN)
} else {
fiDown.push(baseDown[i] > prevFiDown || r[i - 1].Close < prevFiDown ? baseDown[i] : prevFiDown)
prevFiDown = fiDown[i]
}
}
var st = []
var prevSt = NaN
for (var i = 0; i < r.length; i++) {
if (i < period) {
st.push(NaN)
continue
}
var nowSt = 0
if (((isNaN(prevSt) && isNaN(fiUp[i - 1])) || prevSt == fiUp[i - 1]) && r[i].Close <= fiUp[i]) {
nowSt = fiUp[i]
} else if (((isNaN(prevSt) && isNaN(fiUp[i - 1])) || prevSt == fiUp[i - 1]) && r[i].Close > fiUp[i]) {
nowSt = fiDown[i]
} else if (((isNaN(prevSt) && isNaN(fiDown[i - 1])) || prevSt == fiDown[i - 1]) && r[i].Close >= fiDown[i]) {
nowSt = fiDown[i]
} else if (((isNaN(prevSt) && isNaN(fiDown[i - 1])) || prevSt == fiDown[i - 1]) && r[i].Close < fiDown[i]) {
nowSt = fiUp[i]
}
st.push(nowSt)
prevSt = st[i]
}
var up = []
var down = []
for (var i = 0; i < r.length; i++) {
if (isNaN(st[i])) {
up.push(st[i])
down.push(st[i])
}
if (r[i].Close < st[i]) {
down.push(st[i])
up.push(NaN)
} else {
down.push(NaN)
up.push(st[i])
}
}
return [up, down]
}
var preTime = 0
function main() {
exchange.SetContractType(Symbol)
while (1) {
var r = _C(exchange.GetRecords)
var currBar = r[r.length - 1]
if (r.length < pd) {
Sleep(5000)
continue
}
var st = SuperTrend(r, pd, factor)
$.PlotRecords(r, "K")
$.PlotLine("L", st[0][st[0].length - 2], r[r.length - 2].Time)
$.PlotLine("S", st[1][st[1].length - 2], r[r.length - 2].Time)
if(!isNaN(st[0][st[0].length - 2]) && isNaN(st[0][st[0].length - 3])){
if (State == SHORT) {
State = COVERSHORT
} else if(State == IDLE) {
State = OPENLONG
}
}
if(!isNaN(st[1][st[1].length - 2]) && isNaN(st[1][st[1].length - 3])){
if (State == LONG) {
State = COVERLONG
} else if (State == IDLE) {
State = OPENSHORT
}
}
// execution siginal
var pos = null
var price = null
if(State == OPENLONG){ // Open long positions
pos = GetPosition(PD_LONG) // Check positions
// Determine whether the status is satisfied, if it is satisfied, modify the status
if(pos[1] >= Amount){ // Open positions exceed or equal to the open positions set by the parameters
Sleep(1000)
$.PlotFlag(currBar.Time, "Open long positions", 'OL') // mark
OpenAmount = pos[1] // Record the number of open positions
State = LONG // Mark as long
continue
}
price = currBar.Close - (currBar.Close % PriceTick) + PriceTick * 2 // Calculate the price
Trade(OPENLONG, price, Amount - pos[1], pos, PriceTick) // Placing Order function (Type, Price, Amount, CurrPos, PriceTick)
}
if(State == OPENSHORT){ // Open short position
pos = GetPosition(PD_SHORT) // Check positions
if(pos[1] >= Amount){
Sleep(1000)
$.PlotFlag(currBar.Time, "Open short position", 'OS')
OpenAmount = pos[1]
State = SHORT
continue
}
price = currBar.Close - (currBar.Close % PriceTick) - PriceTick * 2
Trade(OPENSHORT, price, Amount - pos[1], pos, PriceTick)
}
if(State == COVERLONG){ // Handling long positions
pos = GetPosition(PD_LONG) // Get position information
if(pos[1] == 0){ // Determine if the position is 0
$.PlotFlag(currBar.Time, "Close long position", '----CL') // mark
State = IDLE
continue
}
price = currBar.Close - (currBar.Close % PriceTick) - PriceTick * 2
Trade(COVERLONG, price, pos[1], pos, PriceTick)
}
if(State == COVERSHORT){ // Deal with long positions
pos = GetPosition(PD_SHORT)
if(pos[1] == 0){
$.PlotFlag(currBar.Time, "Close short position", '----CS')
State = IDLE
continue
}
price = currBar.Close - (currBar.Close % PriceTick) + PriceTick * 2
Trade(COVERSHORT, price, pos[1], pos, PriceTick)
}
if(State == COVERLONG_PART) { // Partially close long positions
pos = GetPosition(PD_LONG) // Get positions
if(pos[1] <= KeepAmount){ // The position is less than or equal to the holding amount, this time the closing action is completed
$.PlotFlag(currBar.Time, "Close long positions, keep：" + KeepAmount, '----CL') // mark
State = pos[1] == 0 ? IDLE : LONG // update status
continue
}
price = currBar.Close - (currBar.Close % PriceTick) - PriceTick * 2
Trade(COVERLONG, price, pos[1] - KeepAmount, pos, PriceTick)
}
if(State == COVERSHORT_PART){
pos = GetPosition(PD_SHORT)
if(pos[1] <= KeepAmount){
$.PlotFlag(currBar.Time, "Close short positions, keep：" + KeepAmount, '----CS')
State = pos[1] == 0 ? IDLE : SHORT
continue
}
price = currBar.Close - (currBar.Close % PriceTick) + PriceTick * 2
Trade(COVERSHORT, price, pos[1] - KeepAmount, pos, PriceTick)
}
LogStatus(_D())
Sleep(1000)
}
}
```
Strategy address: https://www.fmz.com/strategy/201837
## Backtest performance
Parameter setting, K line period, reference: homily SuperTrend V.1--Super trend line system
The K-line period is set to 15 minutes, and the SuperTrend parameter is set to 45, 3. Backtest the OKEX futures quarter contract for the most recent year, and set a contract to trade at a time. Due to the setting to trade only one contract at a time, the utilization rate of funds is very low and you don’t need to care about the Sharpe value.
From: https://blog.mathquant.com/2023/03/17/javascript-version-supertrend-strategy.html | fmzquant |
1,884,171 | Awesome | Top 9 UI Frameworks for Vue.js | Ehy Everybody 👋 It’s Antonio, CEO & Founder at Litlyx. I come back to you with a... | 0 | 2024-06-11T09:05:05 | https://dev.to/litlyx/awesome-top-9-ui-frameworks-for-vuejs-dpi | vue, javascript, webdev, programming | ## Ehy Everybody 👋
It’s **Antonio**, CEO & Founder at [Litlyx](https://litlyx.com).
I come back to you with a curated **Awesome List of resources** that you can find interesting.
Today Subject is...
```bash
Top 9 UI Frameworks for Vue.js
```
We are looking for collaborators! Share some **love** & leave a **star** on our open-source [repo](https://github.com/Litlyx/litlyx) on git if you like it!
## Let’s Dive in!
[](https://awesome.re)
---
# Top 9 UI Frameworks for Vue.js
## 1. Vuetify
[Vuetify](https://vuetifyjs.com/) is a Material Design component framework for Vue.js. It provides a wide range of pre-made components that follow the Google Material Design guidelines, making it easy to create beautiful applications.
## 2. Element
[Element](https://element.eleme.io/) is a UI library for building web applications, primarily targeted at desktop applications. It is simple to use and offers a wide variety of components and features.
## 3. Quasar
[Quasar](https://quasar.dev/) is a high-performance, responsive, Material Design 2.0+ component library. It allows developers to write a single code base and deploy it as a website, mobile app, or desktop app.
## 4. BootstrapVue
[BootstrapVue](https://bootstrap-vue.org/) brings the power of Bootstrap to Vue.js. It includes a comprehensive implementation of Bootstrap 4 components and grid system, along with extensive support for custom themes.
## 5. Buefy
[Buefy](https://buefy.org/) is a lightweight UI component library based on Bulma. It provides simple, lightweight, and responsive components for building web interfaces.
## 6. Ant Design Vue
[Ant Design Vue](https://www.antdv.com/) is a Vue.js UI library based on Ant Design, providing a set of high-quality components and demos for building rich, interactive user interfaces.
## 7. Vue Material
[Vue Material](https://vuematerial.io/) is a lightweight framework built according to the Material Design guidelines. It provides various components and features to create a modern, clean interface.
## 8. Vuesax
[Vuesax](https://vuesax.com/) is a modern Vue.js UI framework offering various unique and beautiful components that can help in creating visually appealing applications.
## 9. Chakra UI Vue
[Chakra UI Vue](https://vue.chakra-ui.com/) is a simple, modular, and accessible component library that gives you all the building blocks you need to build your Vue.js applications.
## Conclusion
These frameworks offer a range of components and tools that can significantly speed up the development process of Vue.js applications. Depending on your project's requirements and design preferences, any of these frameworks can be a valuable addition to your development toolkit.
---
*I hope you like it!!*
Let's get in touch! React & Comments below!
Author: Antonio, CEO & Founder at [Litlyx.com](https://litlyx.com)
| litlyx |
1,884,170 | Understanding Spotify Plus APKs: What You Need to Know | Spotify, the world’s leading music streaming service, offers a range of subscription tiers, including... | 0 | 2024-06-11T09:04:05 | https://dev.to/john_harry_3a72bd61c1802e/understanding-spotify-plus-apks-what-you-need-to-know-1434 | spotifyplusapks, spotifyipa, spotifyp | Spotify, the world’s leading music streaming service, offers a range of subscription tiers, including a free ad-supported version and various premium options. However, some users seek alternative ways to access Spotify’s premium features without paying the subscription fee. This has led to the proliferation of modified applications, commonly referred to as Spotify Plus APKs. In this article, we delve into what Spotify Plus APKs are, their legal and security implications, and the ethical considerations surrounding their use.
What is a Spotify Plus APK?
An APK, or Android Package Kit, is the file format used by the Android operating system for distributing and installing mobile apps. A Spotify Plus APK is a modified version of the official Spotify app. These modifications typically aim to unlock premium features such as ad-free listening, unlimited skips, high-quality audio streaming, and offline playback.
How Do Spotify Plus APKs Work?
[Spotify++ IPA](https://https://spotifyplusapks.com/spotify-ipa) are created by modifying the original Spotify app’s code. Skilled programmers decompile the official app, alter its functionality to bypass subscription checks, and then recompile it into a new APK file. Users can download and install these modified APKs on their Android devices, gaining access to premium features without paying for them.
Legal Implications
Using Spotify Plus APKs is illegal. It violates Spotify’s terms of service and constitutes piracy. Spotify, like any other service provider, relies on subscription fees to support its business model, pay artists, and maintain the platform. When users bypass these payments through illegal means, it harms the company and the music industry as a whole.
Spotify actively combats the distribution and use of modified APKs. They employ various measures to detect unauthorized access, such as account bans and legal actions against distributors of these APKs. Users caught using modified apps risk losing their accounts and facing potential legal consequences.
Security Risks
Beyond the legal issues, there are significant security risks associated with using modified APKs. These risks include:
Malware: Unofficial APKs can contain malware that can compromise your device’s security, steal personal information, or cause other harm.
Data Breaches: Using an unofficial app means trusting the source of the modification. If the source is malicious, it could lead to data breaches and loss of sensitive information.
Lack of Updates: Official apps receive regular updates to fix bugs and enhance security. Modified APKs often lack these updates, leaving users vulnerable to exploits.
Ethical Considerations
Using Spotify Plus APKs also raises ethical questions. Musicians and other content creators rely on revenue from streaming services to earn a living. By bypassing subscription fees, users deny artists their rightful earnings. Supporting creators by paying for content helps ensure a sustainable and thriving music industry.
Furthermore, subscription fees support the development and maintenance of the platform, enabling Spotify to continue offering innovative features and a vast music library. Using modified APKs undermines these efforts and can lead to a poorer experience for all users. | john_harry_3a72bd61c1802e |
1,884,169 | Reliable Conveyor Ovens: Ensuring Consistency in Every Slice | screenshot-1717821713705.png Reliable Conveyor Ovens: Ensuring Consistency in Every... | 0 | 2024-06-11T09:02:55 | https://dev.to/daniel_rahnket_3442df0a4e/reliable-conveyor-ovens-ensuring-consistency-in-every-slice-3hi3 | design |
screenshot-1717821713705.png
Reliable Conveyor Ovens: Ensuring Consistency in Every Slice
Introduction:
If you love pizza, then you know the importance of having an oven that can cook your pizza to perfection every time. This is where the reliable conveyor oven comes in handy. It allows you to cook your pizza consistently, ensuring that each slice is just as delicious as the last. Let's take a closer look at the advantages of using a reliable conveyor oven.
Advantages:
The principal good thing about utilizing a conveyor like dependable is persistence
A conveyor oven products is made to cook your pizza evenly all of the method through, making certain each slice is cooked to excellence unlike traditional ovens
Meaning that it is possible to serve your visitors and visitors with complete self-confidence, realizing that every slice shall taste co DECK OVEN equally as good as the very last
Innovation:
Dependable conveyor oven like electric impingement ovens may also be incredibly innovative
They come designed with features that permit you to undoubtedly get a handle on the heat and speed associated with the conveyor gear, you like it so you can precisely cook your pizza the way
This amount of control ensures outcomes that are constant and every time, making this a investment like fantastic nearly every pizzeria or restaurant
Safety:
Another advantage of reliable conveyor ovens is security
Traditional ovens can particularly be dangerous for everyone people who are not really acquainted with how exactly to use them
Nevertheless having a conveyor range, the possibility of burns off as well as other accidents is greatly paid off
The oven's design means that the pizza is cooked through the conveyor gear and away from any flames that are available areas which are hot
Service:
Dependable conveyor ovens may be incredibly easy also to service
Many manufacturers give you a fix and warranty service, therefore if any thing like such incorrect, you can quickly get it fixed minus the hassle
This means with losing business or letting your prospects down if your oven breaks down that you do not have to concern yourself
Quality:
Finally, the conventional of the pizza cooked inside a conveyor range is the best
The consistency regarding the cooking process implies that each pizza is cooked perfectly, each and every time
This means it is simple to serve your web site visitors with confidence, comprehending that they'll be getting a pizza like time like delicious
Application:
Dependable conveyor DOME OVEN are perfect for an assortment like wide of, from tiny pizzerias to restaurants that are big
These are typically perfect for cooking pizzas, nevertheless they might also be accustomed prepare other dishes, such as for example sandwiches and subs
Whatever your culinary requirements, a conveyor like dependable is without a doubt a investment like great
Conclusion:
In conclusion, investing in a reliable conveyor oven is an excellent choice for any pizzeria or restaurant. It ensures consistency, innovation, safety, quality, and ease of use, making it invaluable. So why settle for a traditional ELECTRIC IMPINGEMENT OVEN when you can have a conveyor oven that ensures consistency in every slice?
| daniel_rahnket_3442df0a4e |
1,884,168 | first | A post by Hean Sopheak | 0 | 2024-06-11T09:01:48 | https://dev.to/hean_sopheak_260bf32d86d1/first-53ac | hean_sopheak_260bf32d86d1 | ||
1,884,167 | Summarizing Community over Code EU 2024 | I helped organize Community over Code EU, June 3-5, in Bratislava, Slovakia. On the actual conference... | 0 | 2024-06-11T09:00:34 | https://dev.to/floord/summarizing-community-over-code-eu-2024-mk7 | asf, cra, opensource, aiact | I helped organize Community over Code EU, June 3-5, in Bratislava, Slovakia. On the actual conference days Software Guru, the agency the ASF (Apache Software Foundation) chose to work with for this event, had everything covered so I could join a lot of talks, and the hallway track too. I have learned a ton about how the ASF works, and about upcoming EU regulations. In fact, I got to participate in the keynote panel around the CRA and AI Act with Mirko Boehm, Community Development at the Linux Foundation Europe, Ana Jiménez Santamaría, OSPO Program Manager at the TODO Group (Linux Foundation), and Natali Vlatko, Open Source Architect at Cisco, SIG Docs Co-Chair for Kubernetes.
A(n attempt at a) summary:
## What I now know about the ASF
**Craig Russell**, ASF Incubator PMC member and Board member, talked about the 25y/o institution and public not-for-profit 501(c)(3) charity: the Apache Software Foundation. "The ASF is a community with over 300 projects, over 800 members, over 9000 committers, and an enormous user base." ASF's mission is to provide software for the public good, free of charge, free to use, modify, distribute and sub-license. ASF's governance is staffed by volunteers.
The ASF is "Safe/Reliable/Trustworthy". Users trust software that works, contributors rely on legal shield, and downstream users rely on fair treatment.
PMCs are key. They set project direction, manage repositories/build/test/release, vote in new PMC members, vote in new committers, and vote for software releases. Votes are required to document the PMC decisions and there's a distinction between binding and not-binding votes:
- PMC members: binding
- PPMC (Podling) members: not binding unless also IPMC (Incubator)
- Community: not binding
Speaking of voting, during and right after CoC the EU European Union Parliament Election took place.
Before a release, a PMC needs to:
- Decide content and release manager
- Create release candidate(s)
- Vote: only binding votes count
- Repeat until 3 binding +1s
- Publish download page, artifacts, checksums, signature(s)
- Announce via Public relations
Special rules apply for incubating "podlings":
- PPMC has no official standing
- Incubator PMC must vote on releases
- Releases are voted on dev@podlingfirst
- Once vote passes with 3 PPMC votes:
- vote goes to general@incubator for IPMC members to vote
- if all Podling Mentors cast +1, vote passes
- if not, try to get IPMC Member votes
_Brand_ has an important role in the ASF ecosystem:
- Primary issue is Name Confusion
- Apache Foo(R) or Apache Foo(TM)
- Companies != "original creators of Apache Foo"
- Apache Foo != "open source edition"
- ASF websites must be role models:
- Apache Foo(TM) at the beginning of all pages
- Trademark notices in footer of all places
**Justin Mclean**, ASF Director, VP ASF Incubator, and Datastrato Community Manager, shared stories from "Inside the Apache Software Foundation Board". With lots of board members in the room, curiously.
ASF Governance:
- Board of Directors governs foundation
- The 9 members are all unpaid volunteers
- At least once yearly meeting, they had a "f2f" just before Community over Code in Bratislava
- ASF members vote in ASF members
- Board members voted in by ASF members
- PMCs (Project Management Committees) govern the project
- Officers of the corporation set foundation-wide policies
BoD possible future change: change from yearly term to ... longer term.
As a Board member, you:
- Attend monthly (virtual) board meetings
- Review officers and project reports
- vote on "resolutions"
- Attend the Board f2f to discuss things like the CRA
Individual board members are "shepherds" who get assigned a number of projects and handle those project's reports.
A good report should:
- be accurate (data should be contextualized. "Contributions went up 20%" could just be dependabot being busy)
- be community-focused
- contain all the requested information
Reviewing reports, Justin looks at:
- number of contributors (and contributor make-up)
- number of commits
- Active contributor base (but notes that little activity is not necessarily bad)
All ASF mailing lists are archived and publicly available, they only use private lists for member/PMC nominations, or security issues.
**David Nalley**, Director Open Source Strategy & Marketing at AWS, and ASF President, started the 3rd day with a "State of the Foundation". The ASF has an obligation to act in the best interest of the general public, not stakeholders, not members. Davis specifically calls out Apache Airflow as providing tremendous value to the general public.
The Foundation should make it easy for its projects to provide value. 25 years ago they offered services to get backups of data, running version control, ticketing system, CI, etc to that end. Today _Infrastructure_ still does that, even if those services are now abundantly available for free (_Infrastructure_ had a table at the conference for office hours)
Today the Foundation should make the compliance story easier. Tools are needed to meet those standards, like easy code signing. "We need to enable projects to build to the highest quality we can attest to." Dirk-Willem van Gulik's talk was a great follow to this, but in this report I'll cover his session later.
**Kanchana Welagedara**, Committer/member ASF and Software Development Manager AWS (OSPO), talked about ASF mentorship and "The Apache Way". She shared a metaphor where when birds fly in a "v" formation, any bird can take over the lead when the first bird gets tired: Community over Code.
In the ASF community:
- Personally and publicly earned authority
- Individuals participate, not organizations: community of peers
- All communications related to code and decision-making to be publicly accessible: Open Communications
dev@ (primarily project development)
- user@ (user community discussion and peer support)
- commits@ (automated source change notifications)
- occasionally supporting roles such as marketing@ (project visibility)
- Projects are overseen by a self-selected team of active volunteers who are contributing to their respective projects: Consensus Decision Making
- Governance model is based on trust and delegated oversight: Responsible Oversight
The membership values derived from it:
- Persistence
- Openness
- Collaboration
- Responsiveness
Opportunities to join the community abound:
- Incubate your project with Apache incubator
- Join Google Summer of Code and work on an ASF project
- Establish your local Apache meetup
- Find your favorite project from the ASF project directory
- Help fix [DEI challenges](https://apache.org/foundation/docs/2023DEIReport.pdf) - I'll return to that at the end, but ASF's Diversity statement includes the vision to "Become the most equitable open source foundation in the world"
Now **Dr. Sherae Daniel** in her keynote that shared the outcomes from studies of how we present ourselves as open source folks, online, had comments on the lack of diversity in the ASF community. Her survey respondents were "mostly male, looking around the room I see that that's about right. The age distribution is as expected too." Many people in the room claimed to dislike self-promotion. **Brian Profitt** in his session asked "Why community marketing and advocacy?" Because you're competing with 372,000,000 open source projects for eyeballs, that's why.
## What I now know about (upcoming) EU regulations affecting OSS
I loved **Dirk-Willem van Gulik's**, VP Public Affairs at the ASF, keynote "All your code are belong to the policymakers, politicians and the law (and that's nowhere near as bad as you think)". Referencing the "move fast and break things" ethos of Mark Zuckerberg, Dirk-Willem says that it "is more important to us humans to not have technology fail than the innovation and wealth it brings when unchecked".
The regulatory outlook:
- PLD - Product Liability Directive
- Updated to add software (no new (strict) liability created)
- CRA - Cyber Resilience Act
- TL;DR: do decent security (test, triage, fix, updates, disclose)
- NIS2, DORA, AI Act, Interop Act, DSA
Political work is done or almost done, and mostly uncontroversial. All of these are already published or will soon be, roll in is phased over the next 1-3 years. The good news: it's not a disaster (anymore).
- A new concept "Open Source Stewards" was introduced last minute
- Decent security is now a requirement when you place something in the market
- (With PLD) waivers and disclaimers now generally void when it involves a natural person
- Impact first and foremost on our industry (i.e. on our community)
- Certain models are no longer viable; software (services) generally more expensive
- Roadkill calculated in (some companies will die) & all sort of funding for mitigation, capacity and capability building available
An "open-source software steward" (art 3, paragraph 18a) means a legal person, other than a manufacturer that has the purpose or objective of **systematically** providing support on a **sustained** basis for the **development** of specific products with digital elements qualifying as **free and open-source software** and **intended for commercial activities**, and that **ensures the viability** of those products.
The CRA brings with it a new class of "economic actors". It's expected to "put in place and document in a verifiable manner a cybersecurity policy to foster the development of a secure product with digital elements as well as an effective handling of vulnerabilities by the developers of that product". Exactly what that means relies on standards that are yet to be written. Something we're already doing are CVE processes, risk based triage, and responsible disclosure. Newer still are SBOMs, and explicit reporting/alerts to the regulators.
As is the case with any type of Standards "the devil is in the details". Many are required (43+) and not written yet. CRA borrows from existing standards (think ISO27001, OWASP, etc), so look at those, but realize there are large gaps still. The ASF of course works with their peers and the industry at Eclipse to write down what we do today (industry best practice): [news.apache.org/foundation/entry/open-source-community-unites-to-build-cra-compliant-cybersecurity-processes](https://news.apache.org/foundation/entry/open-source-community-unites-to-build-cra-compliant-cybersecurity-processes)
For products (that are placed on the market) decent software engineering (including testing, maintenance and fixes) is now "the law". "No matter what Sales, Product Management or shortsighted managers may say". Good governance and proof of functioning management are paramount. Think: mandatory risk assessment throughout the product lifecycle, vulnerability management and (free) security updates. We'll see much higher standards for more critical things (browsers, password managers, chipcard software, hypervisors, PKI, firewalls) - up to third party certification.
The impact on the ASF is direct (as an open source steward) and indirect (downstream). Direct: "we do most of this already; but formalize & automate the boring stuff". Indirect: just like win-win of sharing code - expect a win-win proposition for our employers to also work on these challenges in open source fashion.
CRA makes it mandatory to consider impact on living humans first. "If you're a PMC of 1 (or 2/3 but they aren't very active) you can't meet the requirements of the CRA and you'd be irresponsible placing your product (project) onto the market", says Dirk-Willem. Crossing the threshold to being a digital product is a makefile, making your software available through package managers, writing release notes, etc, signaling a healthy project, vs a hobby script you threw on GitHub.
**Niharika Singhal**, Project Manager Free Software Foundation Europe, in "Ethical Algorithms, Licensing Impasses: The intersection of Free Software and AI openness" says that the fact that "open source AI" is not defined yet is kind of a big deal.
The AI Act says "safe, traceable, non-discriminatory and environmentally sustainable AI systems. The OSD (Open Source Definition) doesn't discriminate field of endeavor, so when the OSI finishes writing the definition of open source AI, it might be at odds with the AI act."
The FSF defines free and open source as free to:
- Use (The software can be used for any purpose without restrictions)
- Study (The software and its code can be analyzed by anyone)
- Share (The software can be shared without limitations)
- Improve (The software can be modified by you or others to give back to the community)
Today AI labeled as "open" exists on a long gradient of semi-open to not really transparent at all.
To ensure "openness" in AI, any new licenses should be interoperable with free software licenses. AI systems should be accessible, reusable and sustainable. And ethical compliance checks must fall within the purview of regulations and not software licenses, says Niharika.
Talking about environmental sustainability, the Green Software Foundation might well be a good partner to seek out. **Asim Hussain**, Executive Director at Green Software Foundation, in his keynote talked about power as the ability to influence people and events. "Open source is a dilution of power, open source leading the sustainability revolution: the impact framework is a technology that dilutes power". "Make diff, not war", and "if you're fully transparent you can never be accused of greenwashing, only of being wrong". You can get involved [grnsft.org/if-whats-next](https://wiki.greensoftware.foundation/whats-next-for-impact-framework).
## What I now know about better decision making
**Addie Girouard**, Principal at Third Man Agency, taled about decision making in an open source project. The 2 tips I'll remember are to add two documents to my project to add transparency through documentation and explaining the "how":
- Governance.md: https://github.com/SOM-Research/collaboro/blob/master/governance.md
- Communications.md: https://patterns.innersourcecommons.org/appendix/extras/communication-template
**Rich Bowen**, Open Source Strategist at Amazon Web Services (AWS), talked about "Talking to management about open source" ([slides](github.com/rbowen/presentations)). He started with an old opensource.com survey on why individuals do open source. "Fun" was a big factor. He notes: that's not why your company does open source, they're in for: profit, customers, shareholders, profit again, and talent.
"All up the company goals and understandings vary." Comprehending the lense through which you will be understood is super important.
Don't be afraid to tell a scary story (heartbleed, log4j, etc) and talk about the cost of replacing stuff. Because: "free does not mean without cost". Rich talked about the "Elephant factor". When one company contributes the most to a project or worse yet all of the code, what happens when they cancel their investment? He also mentioned the "Pony factor", when an IC contributes the majority of the code.
Lead with data. "Apache Commons is a critical component in our product ZYX, which earned USD27M last year. If the project were to fail, we would have to replace it with something else, which would take approximately 6 months of work by 4 engineers, assuming we could find a comparable project with which to replace it, rather than developing what we need from scratch. Therefore, it is in the best interest of our customers, and our bottom line , to participate in the sustainability of that project by contributing bug fixes, feature enhancements, and PR reviews. "
**Bertrand Delacretaz**, Principal Scientist at Adobe, and ASF Board member, had sever pointers for better communication that I'll take to heart:
- "If it isn't on the mailing list it didn't happen"
- "Don't ask for forgiveness, radiate intent"
- "Communication around decisions taken needs to happen on a stable URL" (read: not in a Slack thread)
## What's next?
The North America Community over Code will take place October 7-10, in Denver, Colorado, with Cassandra Summit rolling up in it as a track.
I personally will be looking at getting involved with improving https://community.apache.org and the diversity effort. I've started to talk to **Gláucia Esppenchutz** who had a talk on the topic at the conference. And I'm very glad for the insights **Ruth Ikegah**, Community Lead at CHAOSS Africa, shared around the African open source community and its unique challenges (lack of infrastructure resources like bandwidth connectivity, light and power, need for mentorship, VISA issues). Africa is 54 countries, and 70% of the population are under 30 years old. Forbes said it to be the "next tech hub". The Octoverse report (GitHub) shows Africa as an emerging market for OSS indeed. Ruth suggested checking out OSCA open source community Africa, All in Africa, and the CHAOSS programs in Africa. | floord |
1,884,166 | 10 Cool CodePen Demos (May 2024) | A collection of 10 cool demos shared on CodePen during May 2024 | 0 | 2024-06-11T09:00:18 | https://alvaromontoro.medium.com/10-cool-codepen-demos-may-2024-99b17deb8002 | css, webdev, showdev, html | ---
title: 10 Cool CodePen Demos (May 2024)
published: true
description: A collection of 10 cool demos shared on CodePen during May 2024
tags: CSS,webdev,showdev,html
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/tfw3mg1mfnyng0ca29pp.png
canonical_url: https://alvaromontoro.medium.com/10-cool-codepen-demos-may-2024-99b17deb8002
---
## No text duplication slice and offset
The title of this demo by [Ana Tudor](https://codepen.io/thebabydino) says it all: this text effect was achieved with a single HTML element (and an ::after pseudo-element) with an SVG filter and without requiring any text duplication –which is usually needed for this type of effect.
{% codepen https://codepen.io/thebabydino/pen/RwmPZVR %}
---
## ScrollTrigger DJ
Combining GSAP (and the scrollTrigger plugin) with the Web Audio API, [Adam Kuhn](https://codepen.io/cobra_winfrey) creates a fun demo with a vinyl that can be scratched by scrolling over the disc.
{% codepen https://codepen.io/cobra_winfrey/pen/LYoVdgq %}
---
## CSS Happy Hour: Cat Collage
An animated photo gallery created using HTML and CSS only, with a simple code structure. This demo by [Kasey Bonifacio](https://codepen.io/kaseybon) uses cat photos to complete the demo, which is an added plus :)
{% codepen https://codepen.io/kaseybon/pen/vYMqQje %}
---
## Social Profile Light with Theme Toggle
[Chris Bolson](https://codepen.io/cbolson) developed an interactive profile card using Tailwind. It works with mouse and keyboard and has a light/dark switch to adapt to different themes. The animation may be a bit rough around the edges, but it is nicely done, and the effect looks interesting.
{% codepen https://codepen.io/cbolson/pen/OJGYrQP %}
---
## Animated Slider | Swiper JS & Particles JS
Images grow and text spins as the user interacts with the component in this responsvie demo by [Ecem Gokdogan](https://codepen.io/ecemgo). It uses ParticlesJS to generate a moving background, and SwiperJS to boost interactivity and have smooth animations in the slider.
{% codepen https://codepen.io/ecemgo/pen/jOoNePb %}
---
## PATTERNS
A quiz with 30 questions that uses emojis, shapes, and colors to find the element that matches (or doesn’t match) the pattern. This game developed by [Pedro Ondiviela](https://codepen.io/Pedro-Ondiviela) is fun, although some times it may be difficult to understand the required pattern.
{% codepen https://codepen.io/Pedro-Ondiviela/pen/jORgbbK %}
---
## The how behind pure CSS halftone
Again [Ana Tudor](https://codepen.io/thebabydino) with a cool animated demo that showcases how she created a halftone pattern using three CSS properties. Step by step, the screen updates the code, preview, and explanation, making it easy to view and understand.
{% codepen https://codepen.io/thebabydino/pen/JjqPWNW %}
---
## CSS Slinky?
[Script Raccoon](https://codepen.io/scriptraccoon) with a mesmerizing demo showing an animated slinky(?) created with CSS and HTML. The slinky will spin, rotate, and form different shapes on the screen. It is hard to look away.
{% codepen https://codepen.io/scriptraccoon/pen/bGJyMPg %}
---
## On/Off Plugs
In essence, this component is a light/dark mode toggle switch. And a fun one at it, with plugs connecting and disconnecting to switch the theme, with a smooth animation. Great job by [Jon Kantner](https://codepen.io/jkantner).
{% codepen https://codepen.io/jkantner/pen/XWQLYRP %}
---
## CSS Gears (2)
A 3D CSS demo by [Amit Sheen](https://codepen.io/amit_sheen) (of course). The animation uses HTML and CSS only (no JavaScript or SVG) to move these gears (formed by 10 stacked elements) in an hypnotic way.
{% codepen https://codepen.io/amit_sheen/pen/MWRMmRz %}
---
If you liked these demos, check last month’s article with another ten cool CodePen demos: https://dev.to/alvaromontoro/10-cool-codepen-demos-april-2024-4a70 | alvaromontoro |
1,880,473 | WebAuthn & iframes Integration for Cross-Origin Authentication | Introduction: Leveraging Passkeys in iframes Passkeys offer a superior solution for user... | 0 | 2024-06-11T09:00:00 | https://www.corbado.com/blog/iframe-passkeys-webauthn | iframe, webdev, webauthn, passkeys | ## Introduction: Leveraging Passkeys in iframes
Passkeys offer a superior solution for user authentication, enhancing both security and user experience. A critical aspect of modern web development involves using iframes to embed content from various sources. This article explores how to effectively integrate passkeys within iframes, focusing on cross-origin iframes, to create a seamless login experience.
**_[Read Full Blog Post Here](https://www.corbado.com/blog/iframe-passkeys-webauthn)_**
## Types of iframes and Their Roles
Understanding the different types of iframes is essential for implementing passkeys effectively. Here are the primary types:
1. **Basic iframe:** Embeds content from another URL within the current page.
2. **Responsive iframe:** Adjusts its size based on the screen or container, ensuring a good appearance on all devices.
3. **Secure iframe (Sandboxed iframe):** Restricts actions within the iframe for enhanced security.
4. **Cross-Origin iframe:** Embeds content from a different domain, often used for integrating third-party services like payment gateways.
## How iframes Support Passkeys
Integrating passkeys within iframes introduces both capabilities and constraints. The Web Authentication API, crucial for passkeys, historically had limitations with cross-origin iframes due to security concerns. Recent advancements, however, have made it possible to perform both registration and authentication within cross-origin iframes under certain conditions.
## Login with Passkeys in Cross-Origin iframes
Login operations via cross-origin iframes are now supported across most major browsers, making it feasible to authenticate users seamlessly without redirects or pop-ups.
## Create Passkeys in Cross-Origin iframes
While login operations are broadly supported, creating passkeys in cross-origin iframes is still catching up in browser support. Chrome, Firefox, and Safari have begun to support this feature, with more comprehensive support expected as WebAuthn Level 3 specification is adopted by all major browsers by the end of 2024.
## Use Cases for Passkeys in iframes
Two significant use cases highlight the importance of passkeys in cross-origin iframes:
1. **Federated Identity:** Organizations with multiple domains can allow users to log in across different sites using a single passkey, simplifying user management and enhancing security.
2. **Payments:** Seamless payment processes can be achieved by integrating bank authentication within a merchant's website through cross-origin iframes, enhancing user experience and security.
eee
## Benefits of Using Passkeys in iframes
Embedding passkeys within iframes offers several advantages:
- **Enhanced User Experience:** Eliminates the need for pop-ups or redirects, providing a smoother, less disruptive user experience.
- **Improved Security:** Ensures secure transactions and user verification across different domains.
## Step-by-Step Guide to Implementing Passkeys in iframes
To implement passkeys in iframes effectively, follow these steps:
- **Define Allow Attribute:** Configure the iframe to allow publickey-credentials-get and publickey-credentials-create.
```html
<iframe src="https://passkeys.eu" allow="publickey-credentials-get; publickey-credentials-create"></iframe>
```
- **Set Permission Policy:** Include the relevant Permissions-Policy in your HTTP response headers.
```
Permissions-Policy: publickey-credentials-get=*, publickey-credentials-create=*
```
- **Handle User Activation:** Ensure that the iframe content requires a user action to trigger authentication.
```javascript
document.getElementById('loginPasskeyButton').addEventListener('click', async () => {
try {
const publicKeyCredentialRequestOptions = { /* Configuration options */ };
const credential = await navigator.credentials.get({ publicKey: publicKeyCredentialRequestOptions });
// Handle the created credential
} catch (err) {
console.error('Error authenticating via passkey:', err);
}
});
```
- **Example Implementation:** Use a sample HTML and JavaScript setup to integrate passkeys within a cross-origin iframe.
## Common Challenges and Solutions
1. **Permission Policy Configuration:** Ensure correct settings for allow attributes and HTTP headers.
2. **Browser Compatibility:** Test across multiple browsers and implement specific fixes as needed.
3. **Cross-Origin iframe Issues with Safari:** Be aware of Safari's limitations with cross-origin iframes and avoid third-party cookies.
## Conclusion
Integrating passkeys within iframes enhances security and user experience, offering a seamless authentication process. By understanding the types of iframes and following a structured implementation guide, developers can leverage this technology effectively.
**Find out more on Passkeys & iframes: [How to Create & Login with a Passkey](https://www.corbado.com/blog/iframe-passkeys-webauthn).** | vdelitz |
1,884,165 | Internship For ECE Students | KaaShiv Infotech offers valuable internship for ece students, providing hands-on experience in... | 0 | 2024-06-11T08:59:00 | https://dev.to/internshipforece/internship-for-ece-students-383c | google | KaaShiv Infotech offers valuable [internship for ece students](url), providing hands-on experience in advanced technologies. Interns engage in real-world projects, enhancing their expertise in areas such as embedded systems, VLSI design, and IoT. The program emphasizes practical knowledge, bridging the gap between academic learning and industry requirements. With experienced mentors and a dynamic learning environment, KaaShiv Infotech ensures that interns gain comprehensive technical proficiency and professional development. This internship is an excellent opportunity for ECE students to build a solid foundation for their future careers in technology and innovation.
https://www.kaashivinfotech.com/internship-for-ece-students/
| internshipforece |
1,884,164 | Day 16 of 30 of JavaScript | Hey reader👋 Hope you are doing well😊 In the last post we have seen about this keyword in JavaScript.... | 0 | 2024-06-11T08:57:55 | https://dev.to/akshat0610/day-16-of-30-of-javascript-1ci4 | webdev, javascript, beginners, tutorial | Hey reader👋 Hope you are doing well😊
In the last post we have seen about `this` keyword in JavaScript. In this post we are going to know about **Inheritance** in JavaScript, we are going to start from very basic and take it to advanced level.
So let's get started🔥
## What is Inheritance?
> Inheritance is a way through which properties and methods defined in a class can be easily be used by other class.
The class which inherits the properties and methods is called **Subclass**. And the class whose properties and methods are inherited is called **Superclass**.
Suppose we have a animal class which has properties such as name, type, sound and has methods such as canMove(), canFly() etc. now we have two different classes namely dog and bird these both classes can inherit from the animal class and can utilize the properties and methods defined in it.
## How Inheritance is performed in JavaScript?
To create a class inheritance, use the `extends` keyword.
So here we have a Person class which is a super class for Kid class. The Person class is inherited using `extends` keyword. Now we know that a kid can hav name, gender and age which are already defined in Person class so there is no need to define them seperately in Kid class we can use them with the help of inheritance. We have used `super(name,gender,age)` here this basically means that we are calling the constructor of Person class from Kid class.
By calling the `super()` method in the constructor method, we call the parent's constructor method and gets access to the parent's properties and methods.
We can define Kid specific properties and methods in Kid class.
Multiple classes can inherit from single class.
## Types of Inheritance used in JavaScript
**1. Prototypal Inheritance**
Objects inherit from other objects through their prototypes.
Here we have an Animal constructor function then we have added a `speak()` method to animal prototype then we have a Dog constructor function that calls Animal constructor function using `call()` method so that we can make use of `name` property defined in Animal. Then we have created a new object that inherits from Animal.prototype and assigned it to Dog.prototype. This sets up the inheritance chain, allowing instances of Dog to access methods defined on Animal.prototype. The `Dog.prototype.constructor = Dog` line ensures that the constructor property of Dog.prototype points back to Dog. Becuase after the inheritance setup, if we create an instance of Dog and inspect its prototype chain, we would find that its constructor points to Animal, which is not accurate. The `Dog.prototype.constructor = Dog` line explicitly sets the constructor property back to Dog, ensuring that instances of Dog correctly reference Dog as their constructor.
**2. Classical Inheritance**
Introduced in ECMAScript6 (ES6) with the class keyword. Uses a class-based approach similar to other programming languages like Java or C++.
**3. Functional Inheritance**
Objects inherit properties and methods from other objects through function constructors. It uses functions to create objects and establish relationships between them.
We have used createAnimal function to create animal object which has `name` as property and `sound` as method then we have createDog function that creates a Dog object by calling `createAnimal()` to get a base animal object. A new dog object is created with the name "Buddy" and breed "Labrador" by calling the createDog function.
So this is how Inheritance is performed using JavaScript. I hope you have understood this blog. Don't forget to like the blog and follow me.
Thankyou🩵 | akshat0610 |
1,884,163 | Mastering APIs with GraphQL Request: A Comprehensive Guide | Introduction to the GraphQL Request Library The GraphQL Request library provides... | 0 | 2024-06-11T08:56:23 | https://dev.to/satokenta/mastering-apis-with-graphql-request-a-comprehensive-guide-2iid | graphql, api | ## Introduction to the GraphQL Request Library
The **[GraphQL](https://apidog.com/blog/what-is-graphql/)** Request library provides developers with a straightforward tool for managing GraphQL APIs. Known for its lean implementation and ease of use, this library is perfect for those who need a powerful yet uncomplicated solution to handle projects of varying scales.
### Why Choose GraphQL Request?
- **Minimalistic Approach**: Focuses solely on essential functionalities without unnecessary complications.
- **Ease of Use**: The simple syntax makes it accessible even for beginners.
- **Versatility**: Easily adaptable to projects both large and small.
- **Efficient Performance**: Delivers fast responses while keeping system resource use low.
These features make GraphQL Request a popular choice among developers who value performance and simplicity. Read on to learn how to integrate this tool into your development workflow.
## Getting Started with GraphQL Request
Getting up and running with GraphQL Request is quick, thanks to its simple installation and usage process.
### Installation Guide
You can install the library using either npm or yarn:
```
npm install graphql-request
```
```
yarn add graphql-request
```
### Basic Implementation
Using GraphQL Request couldn't be simpler. Here’s a basic example to get you started:
```
import { request, gql } from 'graphql-request';
const endpoint = 'https://api.spacex.land/graphql/';
const query = gql`
{
launchesPast(limit: 5) {
mission_name
launch_date_utc
rocket {
rocket_name
}
links {
video_link
}
}
}
`;
request(endpoint, query).then((data) => console.log(data));
```
In this example, we're fetching historical launch data from SpaceX's GraphQL API, utilizing `gql` for query parsing and `request` for executing the query.
## Advanced Techniques
Enhance your usage of GraphQL Request by employing more advanced features and techniques.
### Using Query Variables
To make your queries dynamic, utilize variables:
```
const query = gql`
query getLaunches($limit: Int!) {
launchesPast(limit: $limit) {
mission_name
launch_date_utc
rocket {
rocket_name
}
links {
video_link
}
}
}
`;
const variables = { limit: 3 };
request(endpoint, query, variables).then((data) => console.log(data));
```
### Error Handling
Implementing proper error handling is essential for a stable application:
```
request(endpoint, query, variables)
.then((data) => console.log(data))
.catch((error) => console.error(error));
```
### Custom Headers
To set custom headers, such as authorization tokens:
```
const headers = { Authorization: 'Bearer YOUR_ACCESS_TOKEN' };
request(endpoint, query, variables, headers).then((data) => console.log(data));
```
## Integration with Apidog
You can integrate GraphQL Request with **[Apidog](https://www.apidog.com/?utm_source=&utm_medium=blogger&utm_campaign=test1)** for an enhanced API management experience:
1. Go to "Body" → "GraphQL" to begin a new request.
2. Use the "Run" tab to input and manage queries, utilizing the auto-complete feature for efficiency.
## Practical Applications
Discover how GraphQL Request can be beneficial in various practical scenarios.
### Ideal for SPAs and Mobile Applications
GraphQL Request is perfect for single-page applications (SPAs) and mobile apps, where minimal overhead and quick data retrieval are crucial.
### Server-Side Rendering (SSR)
It's also well-suited for server-side frameworks like Next.js or Nuxt.js, ensuring faster page loads with pre-rendered data fetching.
## Best Practices
Ensure you are getting the most out of GraphQL Request by following these best practices:
- **Organize Queries**: Keep your codebase clean and manageable by modularizing your queries.
- **Comprehensive Error Logging**: Implement thorough error logging to quickly identify and solve issues.
- **Use TypeScript**: Enhance reliability through TypeScript’s robust type system.
## Conclusion
Whether you’re working on a solo project or managing a large codebase, GraphQL Request is a powerful yet easy-to-use solution that balances functionality with simplicity. Incorporate it into your next project and optimize your development process with this efficient tool. | satokenta |
1,884,162 | Deep Dive into R8 Technology | 1. Introduction to R8 Technology In Android application development, as the functionality... | 0 | 2024-06-11T08:56:18 | https://dev.to/happyer/deep-dive-into-r8-technology-323g | android, java, development, mobile | ## 1. Introduction to R8 Technology
In Android application development, as the functionality of the application increases, so does its size and complexity. This not only affects the download and installation speed of the application but can also put pressure on the user's device storage. To address these issues, Google introduced R8 (Runtime Reduction) technology, aimed at optimizing the application's code and resources to achieve a lightweight and efficient application.
R8 is a replacement for ProGuard; it is a code optimizer used to reduce the size of Android applications, decrease application startup time, and improve runtime performance. R8 achieves lightweight and efficient applications by analyzing the application's code, removing unused code, optimizing bytecode, compressing resource files, and more.
## 2. Core Features of R8
### 2.1. **Code Shrinking**
R8 reduces the size of the application's bytecode by removing unused code, inlining methods, optimizing loops, and more. This not only reduces the size of the application package but also improves the application's loading speed. R8's code shrinking features include:
- Removing unused classes and members
- Inlining short methods
- Optimizing loops and conditional statements
- Removing unused parameters
**Code Example**:
Assume there is an unused class `UnusedClass`, R8 will automatically detect and remove it during optimization.
```java
// Unused class
public class UnusedClass {
public void unusedMethod() {
System.out.println("This method is never used.");
}
}
```
### 2.2. **Resource Shrinking**
In addition to code shrinking, R8 can also compress images, audio, and other resource files to further reduce the application's size. This is crucial for saving user device storage space and speeding up application startup. Resource shrinking features include:
- Compressing PNG, JPEG, GIF images
- Compressing WAV, MP3 audio files
- Removing unused resource files and directories
**Code Example**:
Configure R8's resource shrinking options in the `build.gradle` file:
```groovy
android {
buildTypes {
release {
minifyEnabled true
useProguard false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
// Configure resource shrinking
shrinkResources true
zipAlignEnabled true
}
}
}
```
### 2.3. Code Obfuscation
R8 obfuscates class names, method names, and attribute names to enhance application security and make the decompiled code harder to understand.
**Code Example**:
Configure obfuscation rules in the `proguard-rules.pro` file:
```
# Obfuscate class names
-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable
# Obfuscate all class names, method names, and attribute names
-all-renames
```
### 2.4. Optimizing Loops and Conditional Statements
R8 optimizes the structure of loops and conditional statements to reduce unnecessary branch judgments and loop iterations.
**Code Example**:
Assume there is a loop that can be optimized:
```java
for (int i = 0; i < array.length; i++) {
if (array[i] > threshold) {
System.out.println("Element " + i + " is greater than threshold.");
}
}
```
R8 will automatically detect this pattern and attempt to optimize it into a more efficient loop structure.
### 2.5. Removing Unused Parameters
R8 can remove unused parameters from method signatures, thereby reducing the size of the bytecode.
**Code Example**:
Assume there is a method with an unused parameter:
```java
public void printSum(int a, int b, int unusedParam) {
int sum = a + b;
System.out.println("Sum: " + sum);
}
```
R8 will automatically remove the unused parameter `unusedParam`.
### 2.6. Supporting ProGuard Rules
R8 is fully compatible with ProGuard and can seamlessly replace ProGuard for code obfuscation and optimization.
**Code Example**:
Add ProGuard rules in the `proguard-rules.pro` file:
```
# Keep the name of a specific class
-keep public class com.example.MyClass {
public void myMethod();
}
```
### 2.7. Retaining Debug Information
R8 retains debug information during optimization, allowing developers to effectively debug the optimized code.
**Code Example**:
Configure the retention of debug information in the `proguard-rules.pro` file:
```
-keepattributes SourceFile,LineNumberTable
```
## 3. Advantages of R8
### 3.1. **Smaller Size**
Applications optimized by R8 are usually smaller in size compared to those optimized by ProGuard, helping to save user device storage space. By removing unused code and resource files, R8 can significantly reduce the application's size, thereby improving download and installation speed. R8 technology helps reduce the size of Android applications through a series of optimization strategies, including:
#### 3.1.1. Removing Unused Code
R8 can identify and remove unused classes, methods, attributes, and fields in the application. These unused codes are not executed during application runtime but increase the application's size. By removing this redundant code, R8 can effectively reduce the bytecode size of the application.
#### 3.1.2. Optimizing Bytecode
R8 optimizes Kotlin and Java bytecode, such as inlining short methods, optimizing loops and conditional statements, and removing unnecessary temporary variables. These optimization measures can reduce the generated bytecode size, thereby reducing the application's size.
#### 3.1.3. Compressing Resource Files
R8 can compress images, audio, and other binary resource files in the application. By using efficient compression algorithms, R8 can reduce the size of resource files without losing quality. Additionally, R8 can remove unused resource files, further reducing the application's size.
#### 3.1.4. Obfuscating Class and Method Names
R8 replaces the application's class names, method names, and attribute names with shorter names to reduce the space they occupy in the bytecode. This obfuscation not only reduces the application's size but also enhances its security, as the decompiled code is harder to understand.
#### 3.1.5. Optimizing Layout and Resource Definitions
R8 can optimize XML layout files by removing unused views and attributes, merging nested layouts, and optimizing resource definitions. These optimization measures can reduce the size of layout files, thereby reducing the application's size.
#### 3.1.6. Supporting ProGuard Rules
R8 is compatible with ProGuard and can seamlessly replace ProGuard for code obfuscation and optimization. Developers can use existing ProGuard rules to further control the application's optimization level and size.
#### 3.1.7. Generating APK and AAB Files
R8 supports generating APK (Android Package) and AAB (Android App Bundle) files. AAB files are a new distribution format that can dynamically download the required resources based on the user's device configuration, thereby reducing the download and installation size.
### 3.2. **Faster Startup**
By optimizing code and resource files, R8 can significantly improve the application's startup speed. Optimized code runs more efficiently, helping to reduce device power consumption and improve application responsiveness. This is crucial for enhancing the user experience. R8 technology helps improve the startup speed of Android applications in several ways:
#### 3.2.1. Code Optimization
R8 optimizes the application's code to reduce the time required for startup. These optimization measures include:
- **Removing Unused Code**: R8 can identify and remove unused classes, methods, and attributes in the application, reducing the actual loading and execution code volume.
- **Inlining Short Methods**: For some short and frequently called methods, R8 will inline them at the call point to reduce the overhead of method calls.
- **Optimizing Loops and Conditional Statements**: R8 optimizes the structure of loops and conditional statements to reduce unnecessary branch judgments and loop iterations.
#### 3.2.2. Resource Compression
R8 compresses the application's resource files to reduce the application's size, thereby improving startup speed:
- **Compressing Images and Multimedia Files**: R8 can compress PNG, JPEG, GIF images, and WAV, MP3 audio files, reducing their disk space usage and shortening application startup time.
- **Removing Unused Resources**: R8 can identify and remove unused resource files and directories in the application, reducing the application's loading time.
#### 3.2.3. Delayed Loading
R8 supports marking certain code and resources for delayed loading, meaning they will be loaded on-demand after the application starts, rather than being loaded all at once during startup. This can significantly reduce memory usage and CPU load during application startup, thereby improving startup speed.
#### 3.2.4. Obfuscating and Optimizing Class Loading
While obfuscating code, R8 also optimizes the class loading order. By reorganizing the class loading order, R8 can reduce the number of class loads and dependency resolution time during application startup.
#### 3.2.5. Reducing Reflection and Dynamic Calls
R8 optimizes code to reduce the use of reflection and dynamic calls. Reflection and dynamic calls are usually slower than direct calls because they need to resolve and find methods at runtime. By reducing these operations, R8 can improve the application's startup speed.
#### 3.2.6. Generating More Efficient Bytecode
R8 generates more compact and efficient bytecode during compilation. This optimized bytecode requires less memory and executes faster, helping to improve the application's startup speed.
### 3.3. **More Efficient Runtime**
Optimized code by R8 runs more efficiently, helping to reduce device power consumption and improve application responsiveness. This is particularly important for mobile applications, as battery life and performance are key concerns for users.
### 3.4. **Ease of Use**
R8's configuration and usage are similar to ProGuard, making it easy for developers to get started. Additionally, R8 provides detailed documentation and examples to help developers better understand and use R8.
## 4. How to Use R8
R8 is integrated into the Android Gradle plugin and is enabled by default when building the release version. Here are some basic configuration steps:
### 4.1. Enabling R8
In the `build.gradle` file, ensure that `minifyEnabled` and `shrinkResources` are set to `true`:
```groovy
android {
buildTypes {
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
```
### 4.2. Configuring ProGuard Rules
Although R8 is compatible with ProGuard rules, you may need to adjust them based on specific circumstances. Add custom rules in the `proguard-rules.pro` file. For example, to keep certain classes and methods:
```proguard
-keep class com.example.myapp.MyClass {
public *;
}
```
### 4.3. Debugging and Optimization
After enabling R8, it is recommended to thoroughly test the application to ensure it still works correctly in the optimized version. You can generate an obfuscation mapping file to help with debugging if issues arise:
```groovy
android {
buildTypes {
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
// Generate obfuscation mapping file
mappingFileUploadEnabled true
}
}
}
```
## 5. Conclusion
R8 is a powerful code shrinking and optimization tool that can significantly enhance the performance of Android applications and reduce their size. By properly configuring and using R8, developers can provide a better user experience without compromising application functionality.
### 6. Codia AI's products
Codia AI has rich experience in multimodal, image processing, development, and AI.
1.[**Codia AI Figma to code:HTML, CSS, React, Vue, iOS, Android, Flutter, Tailwind, Web, Native,...**](https://codia.ai/s/YBF9)
2.[**Codia AI DesignGen: Prompt to UI for Website, Landing Page, Blog**](https://codia.ai/t/pNFx)
3.[**Codia AI Design: Screenshot to Editable Figma Design**](https://codia.ai/d/5ZFb)
4.[**Codia AI VectorMagic: Image to Full-Color Vector/PNG to SVG**](https://codia.ai/v/bqFJ)
| happyer |
1,884,159 | Deploy a WordPress Theme with GitHub Actions | Is it possible to deploy a WordPress theme directly from GitHub? Minified code, “bundler”... | 0 | 2024-06-11T08:56:07 | https://dev.to/maiobarbero/deploy-a-wordpress-theme-with-github-actions-4kal | githubactions, wordpress, tutorial | ## Is it possible to deploy a WordPress theme directly from GitHub?
Minified code, “bundler” of various types, package manager for JavaScript and PHP and so forth… These are just some of the reasons for choosing to **automate the deployment of a WordPress Theme.**
Sure it’s always possible to upload files with ftp every time, but why do it manually when GitHub can take care of everything?
## Welcome to the guide to automate the deployment
First, the theme code must be in a GitHub repository.
Create a .github folder inside the repo. Inside this folder create another folder called workflows and inside it a main.yml file. You can give this file any name you like, the important thing is to keep the .yml extension.
The folder structure will look like this: **.github / workflows / main.yml**
### The .yml file
Let’s start creating our workflow to automate the deployment
```
name: Deploy via FTP
on:
push:
branches: [ main ]
```
_name will simply be the name that we will display in the Actions tab of the repository_
_on: things get interesting here. We define our trigger here. In this case we want to deploy to the push, but we have added a filter: we are only interested in the push done to the main branch. In this way we can have a development branch, perhaps automating the deployment of this on a staging site as well._
```
jobs:
build:
runs-on: ubuntu-latest
defaults:
run:
shell: bash
```
Now we come to the actions, jobs, which will follow, by default in parallel, our workflow. build will be the name of our only job
runs-on: where do we want to run our workflow? GitHub gives us several possibilities listed here.
The last three lines are used to set a default shell for all runs
```
steps:
- uses: actions/checkout@v2
with:
fetch-depth: 2
- name: FTP Deploy WP Theme
uses: SamKirkland/FTP-Deploy-Action@4.3.2
with:
server: FTP SERVER
username: FTP USERNAME
password: ${{ secrets.FTP_PASSWORD }}
server-dir: FTP DIR
exclude: |
**/.git*
**/.git*/**
**/node_modules/**
```
We are at the final steps of our workflow. We just have to worry about writing our ftp server address and username, as well as the destination folder (our theme folder).
Since this file will be accessible from the repository, we can keep some settings like our password secret. To do this we can set a new secret key from the **Setting / Secrets / Actions tab**
Secret key GitHub repository
Are you tired of reading and just want to make a nice copy and paste? Find the .yml file and ready-made folder structure [here](https://github.com/maiobarbero/WordPress-Theme-Deploy-Action)
| maiobarbero |
1,884,161 | Micah Pittard - The Mastermind Behind Million-Dollar Celebrity Endorsements | When it comes to celebrity branding and endorsements, Micah Pittard is a name that reverberates... | 0 | 2024-06-11T08:54:50 | https://dev.to/micahpittard/micah-pittard-the-mastermind-behind-million-dollar-celebrity-endorsements-2lk1 | When it comes to celebrity branding and endorsements, Micah Pittard is a name that reverberates throughout the industry. As the founder of New Standard Branding, Pittard has forged a reputation for his uncanny ability to align stars with multi-million dollar endorsement deals.
Established at the close of 2021, New Standard Branding emerged as a pivotal turning point in the sphere of brand representation, signaling a shift in the industry's approach and ethos. The name of the agency itself encapsulates the essence of Pittard's pioneering vision for the branding landscape, one that strives to elevate the status quo by upholding an unwavering, integrity-driven standard of business.
Rather than adopting a reactive strategy to opportunities, New Standard Branding differentiates itself through an innovative, proactive stance. This is made possible by leveraging the agency’s vast network, which encompasses an array of Fortune 500 brands, top-tier ad agencies, and assorted talent buyers. This approach facilitates the creation of a wealth of opportunities for their clients, placing them ahead of industry trends and ensuring they're positioned to capitalize on emerging opportunities.
In the high-stakes, high-profile world of celebrity endorsements, Micah Pittard track record undoubtedly speaks volumes. His impressive portfolio of successful campaigns boasts a roster of industry heavyweights, serving as testament to his unparalleled expertise and knack for strategic branding. Among these illustrious names are Hollywood stalwarts such as Brad Pitt, Jennifer Aniston, Jon Hamm, and Matthew McConaughey, providing a glimpse into the expansive and diverse range of talents Pittard has successfully maneuvered in the global branding landscape. Each campaign, tailored to the unique persona and public image of these stars, embodies the creativity and innovation that Pittard brings to the table. This roster not only underlines Pittard's credibility in the industry but also illuminates the strategic vision that New Standard Branding, under his leadership, stands for in the fast-paced world of celebrity endorsements.
Pittard's success is rooted in his understanding of the bigger picture. New Standard Branding isn't just about securing lucrative deals; it's about developing comprehensive, long-term strategies that enhance an individual's overall personal brand. This tailored approach is a central element of Pittard's philosophy and the driving force behind NSB's growth.
One of the key differentiators of NSB under Pittard's stewardship is its commitment to a bespoke approach to branding. Instead of applying a one-size-fits-all method, Pittard and his team tailor their strategies to align with a client's unique goals and vision.
Pittard’s expertise stretches beyond securing high-profile endorsements; he also has an extensive understanding of fashion, luxury, and consumer brands. This depth of knowledge allows him to create innovative marketing strategies that utilize celebrity talent in engaging and authentic ways.
Despite his success with A-list talent, Pittard remains dedicated to nurturing emerging talent. He is known for his ability to spot potential and helps to cultivate and build the brands of promising newcomers from the ground up.
Micah Pittard's philosophy is built around synergy and collaboration. New Standard Branding works hand-in-hand with managers, publicists, stylists, and the larger team to ensure a unified and strategic approach to branding.
This collective effort ensures that New Standard Branding's campaigns not only fit with the talent's brand but enhance the overall narrative. By focusing on this bigger picture, Pittard assures that client branding is not just about immediate gains, but about creating a sustainable, long-term impact.
As a testament to his extensive industry experience, Pittard has been responsible for securing some of the most lucrative endorsement campaigns in recent years. His collaborative and strategic approach has led to partnerships that have not only been profitable but have also significantly boosted his clients' public profiles.
Pittard’s approach to representation extends beyond simple business transactions. He considers each client’s unique personality, interests, and public image to develop branding strategies that resonate with both the client and the audience.
Micah Pittard’s work with New Standard Branding signifies a new era in talent branding, commercial talent agencies, and celebrity endorsements. His unique approach and strategic vision have set a new standard, pushing the boundaries and challenging traditional norms within the industry.
Driven by an unwavering commitment to his clients, an unmatchable business acumen, and a deep understanding of the branding landscape, Pittard has solidified his place as a mastermind in the industry. His contribution to the field of celebrity endorsements and branding has not only revolutionized the industry but has also opened the door for a new wave of talent representation.
Whether it’s a high-profile celebrity endorsement or an emerging talent's first commercial campaign, New Standard Branding is dedicated to creating positive and sustainable branding solutions. Their commitment to leveraging creative strategies, strategic partnerships, and big-picture thinking have enabled them to remain one of the leading forces in the industry. This is a testament to the innovative approach and unrelenting dedication of Pittard and his team at New Standard Branding.
At the end of the day, NSB's success boils down to one thing: creating results for their clients. From securing multi-million dollar endorsements to developing comprehensive strategies that enhance an individual's overall brand, Pittard and his team have a proven ability to create campaigns that produce results. It's this commitment to innovation and impact that sets New Standard Branding apart from the competition.
As the industry continues to evolve, there’s no doubt that Micah Pittard and New Standard Branding will remain at the forefront of the talent representation space. With an unparalleled level of expertise and dedication to their craft, they are sure to continue their success and drive the future of celebrity endorsements for years to come.
| micahpittard | |
1,884,160 | Explore the Latest in Pizza Baking Technology: From Oven to Conveyor | Discover the Newest Pizza Baking Technology From Oven to Conveyor Introduction Do you love pizza?... | 0 | 2024-06-11T08:54:28 | https://dev.to/daniel_rahnket_3442df0a4e/explore-the-latest-in-pizza-baking-technology-from-oven-to-conveyor-3cak | design | Discover the Newest Pizza Baking Technology From Oven to Conveyor
Introduction
Do you love pizza? Who does not! Pizza is one of the most beloved foods worldwide, and the advancements in pizza technology have revolutionized the way we make, bake, and serve this dish delicious. From traditional wood-fired ovens to modern conveyor belt systems, the pizza baking technology latest offers a host of advantages that can elevate the DOME OVEN quality, safety, and efficiency of pizza-making. We'll explore the latest innovations in pizza baking technology, from oven to conveyor, and learn more about how they can benefit you and your customers.
Innovations in Pizza Baking Technology
1. Wood-fired Ovens Wood-fired ovens have been a staple of pizza making for centuries, and they carry on to be a choice popular many pizzerias. These ovens use wood as a fuel source, creating a smoky unique difficult to replicate with other cooking methods.
2. Gas Ovens Gas ovens are a far more take modern pizza baking technology, using natural gas or propane as a fuel source. These ovens heat up quickly and evenly, making them a choice popular busy pizzerias.
3. Conveyor Belt Systems Conveyor gear systems are a innovation relatively brand new pizza baking technology. These systems use a conveyor belt to transport pizzas through the oven, ensuring cooking constant and temperatures.
4. Brick Ovens Brick ovens are another method traditional of making that has stood the test of time. These ovens are produced from brick or use and clay wood as a fuel supply. They give you a flavor unique texture to pizzas that cannot be replicated with other cooking methods.
5. Electric Ovens Electric ovens are a choice popular smaller pizzerias and home kitchens. They are easy to use, heat up quickly, and require minimal maintenance.
How to Use Pizza Baking Technology
Using pizza baking technology is relatively simple. Depending on the type of oven or system you choose, you will need to follow some steps that are basic preheating the GAS IMPINGEMENT OVEN, preparing your pizza ingredients, and placing the pizza in the oven. You can follow the manufacturer's instructions or seek guidance from an pizza maker expert. With practice and patience, you can master the art of pizza making and create pies that are delicious your customers will like.
Service and Quality
When it comes to pizza baking technology, service and quality should always be a priority top. You'll want to invest in equipment reliable, simple to maintain, and offers a level high of. Ensure that your staff is adequately trained to operate the equipment and follow all safety protocols. Your pizzas should meet or exceed always your customers' expectations in terms of taste, texture, and presentation.
Applications of Pizza Baking Technology
Pizza baking technology has applications that are numerous from pizzerias and restaurants to home kitchens and food trucks. Whether you are running a pizza large-scale or making personal pizzas at home, there is a pizza baking technology that can suit your DECK OVEN preferences. Consider factors like capacity, size, fuel source, and ease overall of when selecting your equipment.
| daniel_rahnket_3442df0a4e |
1,884,158 | Rock Paper Scissors | Check out this Pen I made! | 0 | 2024-06-11T08:52:01 | https://dev.to/imvpn22/rock-paper-scissors-1la5 | codepen | ---
title: Rock Paper Scissors
published: true
tags: codepen
---
Check out this Pen I made!
{% codepen https://codepen.io/imvpn22/pen/XQBPmJ %} | imvpn22 |
1,884,157 | Analog Clock: Dark/Light theme | Check out this Pen I made! | 0 | 2024-06-11T08:51:25 | https://dev.to/imvpn22/analog-clock-darklight-theme-233i | codepen | ---
title: Analog Clock: Dark/Light theme
published: true
tags: codepen
---
Check out this Pen I made!
{% codepen https://codepen.io/imvpn22/pen/RwPvOgQ %} | imvpn22 |
1,884,156 | Transform Your Kitchen with High-Quality Pizza Baking Equipment | Transforming High-Quality Pizza Baking gear to your kitchen Would you love pizza but hate going out... | 0 | 2024-06-11T08:49:09 | https://dev.to/daniel_rahnket_3442df0a4e/transform-your-kitchen-with-high-quality-pizza-baking-equipment-4293 | design | Transforming High-Quality Pizza Baking gear to your kitchen
Would you love pizza but hate going out to get it? Are you tired of frozen pizzas that just never seem to cook correctly? Well, a solution is had by us for you! By investing in DECK OVEN high-quality pizza baking equipment, you can transform your kitchen and create homemade delicious that the whole family will enjoy.
Advantages of High-Quality Pizza Baking Equipment
The advantages of using pizza high-quality equipment are endless! First and foremost, it allows you to create pizza right in the comfort of your home own you money and time. Additionally, using high-quality equipment ensures that your pizza will come out evenly cooked and will have a perfect crust, providing a better taste experience overall.
Innovation in Pizza Baking Equipment
Current innovations in pizza baking equipment have made it easier than ever before to make pizza at home. One of these innovations is the pizza stone, which heats up evenly and helps to create the crust perfect. Another innovation is the pizza oven, which means that your pizza will evenly be cooked and effectively, resulting in a perfectly cooked pizza every time.
Safety of Pizza Baking Equipment
Using pizza baking equipment is typically very safe, as long as you follow producer's instructions and take safety normal. Always oven wear when inserting or removing pizza from the oven to avoid burns, and make sure your STONE CONVEYOR OVEN equipment is assembled correctly before using.
How to Use Pizza Baking Equipment
Using pizza baking equipment is relatively simple, although there are a few things that are key keep in mind. First, you will need to preheat your pizza or oven stone before making use of. Then, add your pizza ingredients and bake for the recommended time. Finally, remove your pizza from the oven or pizza stone oven using and slice it up for serving.
Quality Service for Pizza Baking Equipment
When investing in pizza baking equipment, it's important to choose a ongoing company that gives quality service and support. Look for a company with a reputation good a solid track record of client service. Additionally, make certain that your equipment comes with a warranty to ensure that you are protected in case of any defects or issues.
Applications for Pizza Baking Equipment
Pizza baking equipment is perfect for a range wide of. Whether you searching for to create homemade pizza for your family or want to start a pizza-making business, investing in high-quality ELECTRIC IMPINGEMENT OVEN equipment is key. With the equipment appropriate you can create delicious and authentic pizza right in your own kitchen, anytime you want.
| daniel_rahnket_3442df0a4e |
1,883,928 | How to make boilerplate for React + Typescript + TailwindCSS + Auth + Vite | I have seen many posts that explains how to make React application using Typescript, or using... | 0 | 2024-06-11T08:48:58 | https://dev.to/xuanmingl/how-to-make-boilerplate-for-react-typescript-tailwindcss-auth-vite-261i | react, tailwindcss, authjs, vite | I have seen many posts that explains how to make **React** application using **Typescript**, or using **TailwindCSS**, or using **Authenication**, or using **Vite**.
But I realized that there is no post that explains all in one.
Today I am going to explain how we can build up a boilerplate that uses **React**, **TailwindCSS**, **Authenication** and **Vite**.
The full source code in on **[Github](https://github.com/isoftchamp/react-ts-auth-vite-boilerplate)** repository
Now let's go.
## Prerequisites
1. Node version ≥ 18.
2. NPM version 8.
**Vite** requires **Node.js** version ≥ 18. and **npm** version 8. However, some templates require a higher **Node.js** version to work.
## Create a Vite React application
Open the terminal and run the following command.
```terminal
npm create vite@latest
```
Give a project name here. I am going to name it **vite-react-boilerplate**
Next select **React** using keyboard arrow key, then press **Enter**.
Then select **Typescript** or **Typescript + SWC**.
Finally install dependencies for the project.
Now navigate your project folder and then run following command.
```console
cd vite-react-boilerplate
npm i
```
Done.
Now you can test your project by running following command.
```console
npm run dev
```
## Add TailwindCSS to your project
Now it's time to add **TailwindCSS** to your project
Run following command.
```console
npm i -D tailwindcss postcss autoprefixer
```
This command will install dependencies as dev-dependencies.
After installation, create **TailwindCSS** configuration by running following command.
```console
npm tailwind init -p
```
Then you will get 2 files: **tailwind.config.js** and **postcss.config.js**.
Now open **tailwindcss.config.js** file, and add following chanages.
```javascript
/** @type {import('tailwindcss').Config} */
export default {
content: [
// You will add this 2 lines.
"./index.html",
"./src/**/*.{js,ts,jsx,tsx}",
],
theme: {
extend: {},
},
plugins: [],
}
```
And then add **TailwindCSS** directives to **index.css** file.
```css
@tailwind base;
@tailwind components;
@tailwind utilities;
...
```
Done.
Now you can use any **TailwindCSS** functionality.
## Authenticate
Now it's time to implement authentication.
To do it, I will use the **React Router DOM** and create an **Authentication Provider**.
For the preparing, run following command in terminal.
```console
npm i react-router-dom js-base64
npm i -D @types/node
```
And then edit vite.config.ts to enable import path alias.
```typescript
import { defineConfig } from "vite";
import react from "@vitejs/plugin-react-swc";
import path from "path";
// https://vitejs.dev/config/
export default defineConfig({
plugins: [react()],
resolve: {
alias: {
"@": path.resolve(__dirname, "./src"),
}
}
})
```
First though, I will create Authenticate Provider.
Create a file under **src/lib**, then name it **auth-util.tsx**. Then input following code into it.
```tsx
import React, {createContext, useContext, useState} from "react";
interface AuthContextProps {
isAuthenticated: boolean;
loginUser: () => void;
logoutUser: () => void;
}
const AuthContext = createContext<AuthContextProps | undefined>(undefined);
export const AuthProvider = (
{
children,
} : {
children: React.ReactNode,
}
) => {
const [isAuthenticated, setIsAuthenticated] = useState(false);
const loginUser = () => setIsAuthenticated(true);
const logoutUser = () => setIsAuthenticated(false);
return (
<AuthContext.Provider
value={{isAuthenticated, loginUser, logoutUser}}>
{children}
</AuthContext.Provider>
)
}
export const useAuth = (): AuthContextProps => {
const context = useContext(AuthContext);
if (!context) {
throw new Error("useAuth muse be used within an AuthProvider");
}
return context;
}
```
Next, create a file under src/components, name it PrivateRoute.tsx. Then input following code into it.
```tsx
import {Outlet, Navigate, type Path, useLocation} from "react-router-dom";
import {encode} from "js-base64";
import {useAuth} from "@/lib/auth-util";
export default function PrivateRoute(
{
loginUrl,
} : {
loginUrl: string | Partial<Path>
}
) {
const {isAuthenticated} = useAuth();
const {pathname} = useLocation();
return isAuthenticated ? <Outlet /> : <Navigate to={`${loginUrl}?redirect=${encode(pathname)}`} replace />;
}
```
And then, create a file under src/pages/LoginPage.tsx, and input following code into it.
```tsx
import {MouseEvent, useState} from "react";
import {useAuth} from "@/lib/auth-util";
import {useNavigate, useLocation} from "react-router-dom";
import {decode} from "js-base64";
const loginData = {
email: "admin@example.com",
password: "password",
};
export default function LoginPage() {
const {loginUser} = useAuth();
const navigate = useNavigate();
const {search} = useLocation();
const [email, setEmail] = useState(loginData.email);
const [password, setPassword] = useState(loginData.password);
const login = (e: MouseEvent) => {
e.preventDefault();
if (email === loginData.email && password === loginData.password) {
loginUser();
const queryParameters = new URLSearchParams(search);
const redirect = queryParameters.get("redirect");
navigate(redirect ? decode(redirect) : "/");
}
}
return (
<>
<div className="flex min-h-full flex-1 flex-col justify-center px-6 py-12 lg:px-8">
<div className="sm:mx-auto sm:w-full sm:max-w-sm">
<h2 className="mt-10 text-center text-2xl font-bold leading-9 tracking-tight text-gray-900">
Sign in to your account
</h2>
</div>
<div className="mt-10 sm:mx-auto sm:w-full sm:max-w-sm">
<form className="space-y-6" action="#" method="POST">
<div>
<div className="flex items-center justify-between">
<label htmlFor="password" className="block text-sm font-medium leading-6 text-gray-900">
Email address
</label>
</div>
<div className="mt-2">
<input id="email" name="email" type="email"
autoComplete="email" required
className="block w-full rounded-md border-0 py-1.5 text-gray-900 shadow-sm ring-1 ring-inset ring-gray-300 placeholder:text-gray-400 focus:ring-2 focus:ring-inset focus:ring-indigo-600 sm:text-sm sm:leading-6"
value={email}
onChange={e => setEmail(e.target.value)}
/>
</div>
</div>
<div>
<div className="flex items-center justify-between">
<label htmlFor="password" className="block text-sm font-medium leading-6 text-gray-900">
Password
</label>
</div>
<div className="mt-2">
<input id="password" name="password" type="password"
autoComplete="current-password" required
className="block w-full rounded-md border-0 py-1.5 text-gray-900 shadow-sm ring-1 ring-inset ring-gray-300 placeholder:text-gray-400 focus:ring-2 focus:ring-inset focus:ring-indigo-600 sm:text-sm sm:leading-6"
value={password}
onChange={e => setPassword(e.target.value)}
/>
</div>
</div>
<div>
<button
type="submit"
className="flex w-full justify-center rounded-md bg-indigo-600 px-3 py-1.5 text-sm font-semibold leading-6 text-white shadow-sm hover:bg-indigo-500 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-indigo-600"
onClick={login}
>
Sign in
</button>
</div>
</form>
</div>
</div>
</>
)
}
```
And then add **Homepage** and **AccountPage**.
```tsx
// src/pages/HomePage.tsx
export default function HomePage() {
return (
<>HomePage</>
)
}
```
```tsx
// src/pages/AccountPage.tsx
export default function AccountPage() {
return (
<div>Account Page</div>
)
}
```
Now we have all pages to required for app, so let's create **Navbar** component.
```tsx
// src/components/Navbar.tsx
import {Link, useNavigate} from "react-router-dom";
import {Disclosure} from "@headlessui/react";
import {ArrowLeftEndOnRectangleIcon, ArrowLeftStartOnRectangleIcon } from "@heroicons/react/24/outline";
import {useAuth} from "@/lib/auth-util";
const navigation = [
{ name: "Home", href: "/" },
{ name: "Account", href: "/account" },
];
export default function Example() {
const {isAuthenticated, logoutUser} = useAuth();
const navigate = useNavigate();
return (
<Disclosure as="nav" className="bg-gray-800">
<div className="mx-auto max-w-7xl px-2 sm:px-6 lg:px-8">
<div className="relative flex h-16 items-center justify-between">
<div className="flex flex-1 items-center justify-center sm:items-stretch sm:justify-start">
<div className="hidden sm:ml-6 sm:block">
<div className="flex space-x-4">
{navigation.map((item) => (
<Link
key={item.name}
to={item.href}
className="text-gray-300 hover:bg-gray-700 hover:text-white rounded-md px-3 py-2 text-sm font-medium"
>
{item.name}
</Link>
))}
</div>
</div>
</div>
<div className="absolute inset-y-0 right-0 flex items-center pr-2 sm:static sm:inset-auto sm:ml-6 sm:pr-0">
<button
type="button"
className="relative rounded-full bg-gray-800 p-1 text-gray-400 hover:text-white focus:outline-none focus:ring-2 focus:ring-white focus:ring-offset-2 focus:ring-offset-gray-800" onClick={() => isAuthenticated ? logoutUser() : navigate("/login")} >
<span className="absolute -inset-1.5" />
<span className="sr-only">View notifications</span>
{isAuthenticated && <ArrowLeftStartOnRectangleIcon className="h-6 w-6" aria-hidden="true" />}
{!isAuthenticated && <ArrowLeftEndOnRectangleIcon className="h-6 w-6" aria-hidden="true" />}
</button>
</div>
</div>
</div>
</Disclosure>
)
}
```
Finally, change **App.tsx** file as follows.
```tsx
import {BrowserRouter as Router, Routes, Route} from "react-router-dom";
import LoginPage from "@/pages/LoginPage.tsx";
import HomePage from "@/pages/HomePage.tsx";
import AccountPage from "@/pages/AccountPage.tsx";
import Navbar from "@/components/Navbar";
import PrivateRoute from "@/components/PrivateRoute.tsx";
import {AuthProvider} from "@/lib/auth-util.tsx";
import "./App.css";
function App() {
return (
<AuthProvider>
<Router>
<Navbar />
<Routes>
<Route path="/login" element={<LoginPage />} />
<Route path="/" element={<HomePage />} />
<Route path="/" element={<PrivateRoute loginUrl={"/login"}/>} >
<Route path="/account" element={<AccountPage />} />
</Route>
</Routes>
</Router>
</AuthProvider>
)
}
export default App
```
Done.
Now we have the boilerplate for React + Typescript + TailwindCSS + Auth + Vite | xuanmingl |
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| motuaochok24 | |
1,884,153 | Beyond Music: How Audio Editing Software Can Elevate Your Videos | In today's digital age, the power of audio storytelling has exploded. Podcasts are captivating... | 0 | 2024-06-11T08:44:34 | https://dev.to/saasbery/beyond-music-how-audio-editing-software-can-elevate-your-videos-26ml | marketing | In today's digital age, the power of audio storytelling has exploded. Podcasts are captivating millions, musicians build global followings online, and video creators rely on captivating sound to elevate their content. But behind every captivating voice and polished soundscape lies a crucial tool: audio editing software.
Audio editing software is the unsung hero for creators of all levels, the secret weapon that transforms raw recordings into polished masterpieces. Whether you're a seasoned podcaster, a budding musician yearning for studio-quality sound, or a video editor seeking to refine your project's audio, this software empowers you to take complete control and express your vision with sonic brilliance.
Unveiling the Powerhouse: What Can Audio Editing Software Do?
The days of detailed analog editing are a distant memory. Modern audio editing software offers a user-friendly digital environment with powerful features catering to various audio needs. Here's a glimpse into the magic it can unleash:
Non-Destructive Editing:
This revolutionary feature allows you to make precise cuts, trims, and adjustments to your audio without altering the original file. Experiment freely, knowing you can always revert to the original if needed. This fosters a safe and creative editing space.
Noise Reduction:
Unwanted background noise can be a major distraction. Audio editing software provides tools to eliminate hisses, hums, traffic sounds, or any other environmental noise that might mar your recording. Achieve crystal-clear audio for a professional listening experience.
Mixing and Mastering:
Imagine having complete control over your project's sonic landscape. With audio editing software, you can achieve this by balancing the levels of multiple audio tracks, adjusting the EQ (equalization) to fine-tune the frequencies, and applying effects for a polished and cohesive final product.
Audio Effects Arsenal:
Spice up your audio with a vast library of effects! From subtle enhancements like compression and reverb to creative tools like chorus and distortion, these effects allow you to sculpt your sound and inject personality into your project.
Surgical Precision Editing:
Do you need to remove a cough in the middle of a podcast episode or seamlessly splice together different takes of a song recording? Audio editing software empowers you with frame-by-frame precision for meticulous editing, ensuring a flawless final product.
These are just a few of the many functionalities audio editing software offers. It's a versatile tool that can be applied to various audio projects, making it an essential part of any creator's toolkit.
Finding Your Perfect Match: Choosing the Right Audio Editing Software
The beauty of the audio editing software landscape is its diversity. There's an option waiting to be discovered that is perfectly tailored to your specific needs and budget. Here's a roadmap to guide you on your quest for the ideal software:
Know Your Skill Level:
Are you a complete beginner venturing into the world of audio editing for the first time? Or are you a seasoned professional seeking advanced features for complex projects? Identifying your skill level is crucial. Beginner-friendly software offers a user-friendly interface with basic editing tools that are easy to learn. Conversely, advanced options cater to experienced users with many features and in-depth customization options.
Feature Focus:
Different software programs cater to different workflows. Identify the specific features that are crucial for your projects. Do you need multitrack editing capabilities to simultaneously record and mix multiple audio sources? Are advanced audio effects essential for your creative vision? Do you require seamless integration with other creative software you use regularly? Narrowing down your feature requirements will help you eliminate options that aren't a good fit.
Budgeting for Creativity:
While premium audio editing software offers a wider range of advanced features and functionality, it often comes with a subscription fee or a one-time purchase cost. However, the good news is that fantastic free and open-source options are available! These programs might not have all the bells and whistles, but they can still be powerful tools for basic editing needs. Additionally, many premium software options offer free trials, allowing you to test-drive the features before committing.
Pro Tip:
Don't be afraid to explore! Research different software options, read reviews, and use free trials whenever possible. This hands-on approach allows you to discover the most intuitive and efficient software for your workflow.
Beyond Audio Editing Software: The World of Sound Design
While this article primarily focuses on general-purpose audio editing software, it's important to acknowledge the existence of specialized programs categorized as [sound editing software.](https://www.saasbery.com/resource/audio-editing-software/) These programs cater specifically to the needs of sound designers, Foley artists, and dialogue editors working on film, video, and animation projects.
Sound design software often incorporates advanced features specifically designed for these workflows, such as:
Sound Library Integration:
Access to vast libraries of pre-recorded sound effects allows them to quickly find and incorporate sound effects that perfectly match the visuals on screen.
Dialogue Editing Tools:
These tools are designed for meticulous editing and cleaning of dialogue recordings. Features like noise reduction specifically targeted for dialogue, automatic plosive removal (those pesky "p" and "b" sounds), and spectral editing for precise frequency manipulation allow for pristine and clear dialogue tracks.
Batch Processing:
Sound designers often need to apply the same effect or edit to multiple audio files simultaneously. Batch processing capabilities can significantly streamline their workflow by automating repetitive tasks.
While sound design software offers a specialized set of features, it often shares many core functionalities with general audio editing software. This means that for some creators, particularly those working on simpler audio projects or those just starting general audio editing software may be sufficient to achieve their desired results.
The Creative Canvas: Unleashing Your Potential with Audio Editing Software
Mastering the art of audio editing opens a world of creative possibilities. Imagine the ability to:
Craft Captivating Podcasts:
You can transform raw podcast recordings into polished and engaging experiences with audio editing software. Edit out unwanted silences, add intros and outros, incorporate background music, and adjust levels for a professional listening experience that keeps your audience hooked.
Elevate Your Music Productions:
From home recording studios to professional setups, audio editing software empowers musicians to achieve studio-quality sound. Record, edit, and mix your tracks to perfection. Experiment with effects, create seamless transitions and master your final product for a radio-ready sound.
Bring Videos to Life:
Compelling sound design is a cornerstone of any captivating video. Audio editing software empowers video creators to add layers of sound effects, create soundtracks, and meticulously edit dialogue to complement the visuals perfectly. This helps to create a truly immersive and impactful viewing experience.
There are countless other creative applications for audio editing software, limited only by your imagination. Whether you're a filmmaker crafting a heart-stopping documentary, a game developer creating an atmospheric soundscape, or simply someone who wants to add a professional touch to a home video, audio editing software empowers you to become the architect of your sonic world.
The Journey Begins: Tips for Success with Audio Editing Software
Embarking on your audio editing journey can be both exciting and overwhelming. Here are a few tips to help you get started and ensure success:
Start with the Basics:
Try to learn only some things at a time. Begin by familiarizing yourself with the core functionalities of your chosen software. Learn how to make basic cuts, adjust levels, and apply simple effects. As you gain confidence, you can gradually explore more advanced features.
Practice Makes Perfect:
The best way to master audio editing is through consistent practice. Start with small projects and experiment with different techniques. Many online tutorials and resources are available to help you learn specific skills.
The Power of Listening:
Develop a critical ear for audio quality. Pay attention to the details of professionally produced audio content and try to replicate those qualities in your work. This will help you refine your editing skills and achieve a polished sound.
Embrace the Community:
The online audio editing community is a valuable resource. Join forums, connect with other creators, and share your work for constructive feedback. This can be a great way to learn new techniques, get inspired, and stay motivated on your creative journey.
Conclusion: The Symphony of Creativity Awaits
Audio editing software is not just a tool; it's a gateway to a world of sonic expression. Whether you're a seasoned professional or a budding creator taking your first steps, this software empowers you to take control of your audio, refine your sound, and deliver a polished and captivating final product. With dedication, practice, and a dash of creativity, you can transform your raw recordings into a symphony of sound that resonates with your audience. So, dive into the world of audio editing software, unleash your creative potential, and share your voice!
| saasbery |
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1,884,151 | Detailed Internet Security Analysis: Common Vulnerabilities and Best Practices | Security is a major threat to companies striving to deliver software quickly. Alongside existing... | 0 | 2024-06-11T08:42:39 | https://dev.to/markomeic/detailed-internet-security-analysis-common-vulnerabilities-and-best-practices-4o2 | sec, vulnerabilities, owasp, webdev | Security is a major threat to companies striving to deliver software quickly. Alongside existing vulnerabilities in application code and security breaches, companies and developers must also be aware of the potential security vulnerabilities that super-powerful quantum computers pose to currently used cryptographies.
**To raise awareness of security risks, it is crucial to be informed about new threats to IT security.**
> The problems vary: encrypted data can be stolen, stored for potential decryption by quantum computers in the future, and so on. To ensure the protection of sensitive data, developers must prioritize the implementation of modern secure programming practices and strong encryption and authentication into applications.
## Be aware of the data leakage
Perhaps we can live with the fact that our data is used without our consent, but **none of us likes it when this data ‘leaks’ into the public domain on the internet without our consent or knowledge.**
Although many companies maintain high-security standards and invest large amounts of money in protecting their users' data, data leakage is still a common problem. As internet users, we all have private data stored on various websites and applications. Therefore, it is important to be aware of the dangers of data leakage and always check the security of the websites and applications we use.
## OWASP Top 10 most critical vulnerabilities
To protect themselves from attacks, **companies should follow recommendations and best practices in web security.**
The Open Worldwide Application Security Project (OWASP) is a nonprofit organization dedicated to improving software security. Among many projects, OWASP also works on documents like the **“OWASP Top 10 Most Critical Vulnerabilities,” which consist of a broad consensus on the biggest security risks for web applications.**
**The goal of this document is to raise awareness among developers and other IT industry professionals about the greatest security risks and educate them on how to prevent these risks.** In this blog, we will highlight the five most critical vulnerabilities from the mentioned top 10:
**1. A01:2021 - Broken access control**
94% of applications were tested for some form of improper access control, showing that 34 common weaknesses of improper access control appeared more frequently in applications than any other category.
**2. A02:2021 - Cryptographic failures**
previously known as sensitive data exposure, which was a general symptom, not a primary cause. The renewed focus here is on flaws related to cryptography that often lead to the exposure of sensitive data or compromise the security of systems.
**3. A03:2021 - Injection**
94% of applications were tested for some form of injection, and the 33 CWEs categorized here rank second in the frequency of occurrence in applications. Cross-site scripting is now also included in this category.
**4. A04:2021 - Insecure design**
a new category focusing on risks associated with design flaws. If, as an industry, we truly want to make a shift towards security, this requires greater use of threat modeling, secure design patterns, principles, and reference architectures.
**5. A05:2021 - Security misconfiguration**
90% of applications were tested for some form of incorrect security configuration. With the increase in transition to highly configurable software, it is not surprising to see this category progressing. The former category for XML External Entities (XXE) is now part of this category.
## Broken access control
Access control implements measures that prevent users from acting beyond granted permissions. Deficiencies usually lead to unauthorized disclosure, alteration, or destruction of data or performing some business function outside of user limitations.
- Common vulnerabilities in access control include:
- Unauthorized access to specific features or users
- Circumventing access control checks by changing URLs
- Allowing the viewing or editing of someone else’s account by exposing a unique reference to objects
- API security with missing access controls
- Incorrect CORS configuration that allows access to the API from unauthorized or untrusted sources (i.e., lack of whitelisting)
**Implementing security tests into unit tests is a long-term investment that involves greater investment in developers' awareness of security.** In addition to helping developers better understand how to test for security issues, **this can greatly improve the overall quality of software and reduce the number of vulnerabilities in web applications.**
## Cryptographic weaknesses
Do we ensure security using protected HTTPS protocols when transferring information? **Websites secured with HTTPS connections provide visitors with enhanced reliability through data encryption, which makes it more difficult to track users and their data.**
In addition to tracking users, the **content received is also secured because it involves a secure communication channel** where interception and modification of the received content are prevented. Some internet browsers, such as Google Chrome, penalize and specifically mark websites that are unprotected by SSL/TLS certificates (used for HTTPS protocols).
We secure files when transferring them between users using the **FTPS protocol**. Originally, the FTP protocol allowed users to transfer files without any encryption or protective measures. FTPS is an upgraded FTP with an added security level of Secure Socket Layer (SSL).
Similarly, as with HTTPS protocols, **a secure communication channel is established through which all information passes between the user and the website**. All data are encrypted, and only an SSL-protected server can decrypt these data using a shared SSL key.
## SQL injection
**A security problem that has existed for over 20 years. Why is it still present in 2024?**
SQL injection attacks occur when **attackers send invalid data to an application, which is mistakenly executed as SQL commands**. This can manipulate the database data without proper authorization. **Attackers insert SQL commands where they are not expected**, for example, in the password input field during application login.
**What are some methods to protect against SQL injection attacks?**
**1. Data sanitization of user input**
The application should ensure the elimination of all characters from user input that could be executed as SQL code, such as parentheses and colons.
**2. Input validation**
The application should ensure input validation and limit the number and type of characters that can be entered.
**3. Use of a secure API interface**
The recommended option is to use a secure API interface that completely avoids using an interpreter, provides a parameterized interface, or uses tools for object-relational mapping (ORM).
**The reasons behind security issues in 2024**
So, going back to the previous question, do these security issues still exist in 2024?
**Lack of specific security awareness among developers**
There's often a shortfall in security-specific awareness and training among those who develop applications.
**Lack of automated effective testing methods**
There is a lack of automated testing methods that enable precise detection of injections (e.g., tests without false positive results).
**Use of database access libraries**
These libraries are supposed to provide a secure way to access databases but can often still be exploited, giving developers a false sense of security.
**Volume of SQL databases**
Finally, almost every web application uses some form of database, and the sheer volume of SQL databases on the internet provides a broad surface for attack.
## How things have changed - From experts to users
It is certainly necessary to **follow recommendations and best practices in web security**, such as those suggested by OWASP.
However, even though recommendations and security tools are available, **attackers often exploit vulnerabilities that also appear in the libraries we use in application development**. Previously, we had to manually program everything because there weren't as many auxiliary libraries as available today.
On the other hand, those that did exist often did not meet the needs of our applications. Therefore, **developers had to have a broad knowledge of program functionalities without the help of additional libraries.**
Since we could not rely too much on ready-made solutions, most developers paid more attention to security. However, over time we began to use libraries for almost everything, **but we did not retain the desire to understand all the details within those libraries.**
Attackers targeting our applications or libraries can use techniques that exploit even the smallest problems in our code. **Even if you write the code correctly, in 99% of cases, that remaining 1% can make your application just as vulnerable as if you had not implemented any protection at all.**
Let's see an example of such an attack through popular open-source packages.
**Damaged NPM libraries**
NPM (Node Package Manager) is the most used package manager for JavaScript in Node.js. Through NPM, we can install and manage packages for our JavaScript applications.
Users of popular open-source packages "colors" and "faker" were stunned when they saw their applications crashing and displaying nonsense, affecting even thousands of applications.
**The creator of these packages intentionally included an infinite loop that crashed hundreds of applications that rely on these packages.** These loops print nonsensical non-ASCII characters on the consoles of all affected applications and continue to execute indefinitely, thus causing crashes.
The real motive behind this action was retaliating against mega-corporations and commercial users of open-source projects who heavily rely on free community-contributed software without giving back.
**Best practices for selecting and using open-source libraries**
Given these challenges, **it is important to adopt cautious and strategic practices when selecting and using open-source libraries**. Here are some recommendations to ensure the reliability and security of your applications
- **Be careful about which packages you use.** Not all packages are maintained with the same level of security and reliability.
- **Choose packages maintained by established consortia dedicated to improving and maintaining software.** This ensures ongoing support and updates.
- **Prefer using source code over binary whenever possible.** This recommendation is especially important because binary files imply a much higher level of risk since it is ultimately impossible to verify that they were built with the associated source code. The best approach would be to directly use the source code, check its integrity, and analyze its vulnerability before using it in application development.
## Top-tier code is a secure code
We can ensure a certain level of security by **using various tools to check for vulnerabilities in our code**, such as:
- **OWASP ZAP** - The most popular tool for testing the security of web applications.
- **MobSF** - Provides automated security testing for mobile applications.
- **SonarQube** - Used for analyzing and testing the quality and security of code in various programming languages.
**These tools can detect various vulnerabilities in web applications and mobile applications**, including compromised authentication, exposure of sensitive data, incorrect security configurations, SQL injection attacks, cross-site scripting, unsafe data deserialization, and components and libraries with known vulnerabilities.
## What can companies do today to protect their data?
Today, security is more necessary than it was 10 years ago. From HTTP anomalies, SQL injection attacks, and cross-site scripting (XSS) to attempts at account takeovers and malicious bots.
**To ensure the security of our applications, it is crucial that every company operating on the web does not compromise security for the speed of delivering new applications or functionalities.** Most importantly, the company must maximize the security of its end-users' data.
If you have any questions about how we handle security at our company, feel free to reach out in the comments below!
| markomeic |
1,884,141 | Gantt Charts: An In-Depth Exploration | Introduction Gantt charts, a vital tool in project management, have evolved significantly... | 0 | 2024-06-11T08:41:17 | https://dev.to/lenormor/gantt-charts-an-in-depth-exploration-25e5 | webdev, javascript, programming, gantt | ## Introduction
Gantt charts, a vital tool in project management, have evolved significantly since their inception in the early 20th century. These charts are used to illustrate project schedules, showing the start and finish dates of various elements of a project. The use of Gantt charts helps in planning, coordinating, and tracking specific tasks in a project. Over time, their utility has extended beyond project management to various fields, including construction, IT, education, and more. This article delves into the fundamentals of Gantt charts, their history, applications, and specifically their implementation using JavaScript, highlighting tools and libraries such as ScheduleJS, Syncfusion, and others used for scheduling.
**History of Gantt Charts**
The concept of the Gantt chart was introduced by Henry L. Gantt, an American mechanical engineer, around 1910-1915. He developed these charts to improve productivity in the manufacturing sector by streamlining project scheduling and task tracking. Gantt charts provided a visual representation of project timelines, helping managers see the sequence of tasks, their duration, and overlap, which in turn facilitated better planning and resource allocation.
**Fundamentals of Gantt Charts**
A Gantt chart is essentially a bar chart that represents a project schedule over time. The horizontal axis represents time, while the vertical axis lists the tasks or activities. Each task is depicted as a horizontal bar, with its length corresponding to the duration of the task. Key elements of a Gantt chart include:
- **Task List:** A list of all the tasks required to complete the project.
- **Timeline:** A horizontal timeline that may be broken down into days, weeks, or months.
- **Bars:** Horizontal bars that represent the duration of each task.
- **Dependencies:** Arrows or lines showing dependencies between tasks, indicating which tasks must be completed before others can begin.
- **Milestones:** Special markers indicating significant events or deadlines within the project.
## Applications of Gantt Charts
Gantt charts are used in various fields due to their versatility and effectiveness in project management. Some key applications include:
- **Construction:** For planning construction projects, scheduling phases, and tracking progress.
- **Software Development:** For tracking development stages, sprints, and releases.
- **Event Planning:** For organizing events, conferences, and other activities.
- **Marketing Campaigns:** For planning and executing marketing strategies and campaigns.
- **Education:** For managing academic projects, research, and coursework timelines.
## Implementing Gantt Charts in JavaScript
With the advent of web technologies, Gantt charts can now be implemented using various JavaScript libraries and frameworks. This allows for interactive, dynamic, and responsive Gantt charts that can be integrated into web applications.
Below are some popular JavaScript libraries and tools for creating Gantt charts:
## ScheduleJS
[ScheduleJS](https://schedulejs.com/) is a robust and flexible JavaScript library designed to create interactive and dynamic Gantt charts. It is particularly noted for its customization capabilities and ease of integration into various web applications.
**Features:**
- **Interactive UI:** Allows users to drag and drop tasks, adjust durations, and change dependencies with ease.
- **Resource Management:** Enables efficient tracking and allocation of resources.
- **Customizable:** Offers extensive customization options to fit the specific needs of your project.
- **Responsive Design:** Ensures that the Gantt charts are accessible and functional across different devices and screen sizes.
## Syncfusion
[Syncfusion](https://www.syncfusion.com/) provides a comprehensive set of UI components for building modern web applications, including a feature-rich Gantt chart component. Syncfusion’s Gantt chart is highly customizable and integrates well with Angular, React, Vue, and other frameworks.
**Features:**
- **Data Binding:** Supports various data sources, including JSON and RESTful services.
- **Interactive Editing:** Allows inline editing of tasks and schedules.
- **Critical Path:** Highlights the critical path in the project.
- **Advanced Filtering:** Offers filtering, sorting, and searching capabilities.
## Advanced Features and Customizations
Implementing Gantt charts in JavaScript offers numerous possibilities for customization and enhancement. Here are some advanced features you can add:
- **Drag-and-Drop Scheduling:** Allow users to interactively change task durations and dependencies by dragging and dropping bars.
- **Resource Allocation:** Integrate resource management to assign and track resources across tasks.
- **Critical Path Analysis:** Highlight the critical path to focus on key tasks that impact the project completion date.
- **Milestone Tracking:** Add milestones to mark significant points in the project.
- **Export and Import:** Enable exporting the Gantt chart to various formats like PDF, Excel, and importing data from these formats.
## Future Trends in Gantt Chart Implementation
The future of Gantt charts looks promising with continuous advancements in technology. Here are some trends that are shaping the future of Gantt charts:
- **AI and Machine Learning:** Integrating AI and machine learning can enhance Gantt charts by predicting potential delays, optimizing resource allocation, and suggesting best practices for project management.
- **Real-Time Collaboration:** Cloud-based Gantt chart tools are facilitating real-time collaboration, allowing teams to work together seamlessly, regardless of their geographic location.
- **Integration with Other Tools:** Enhanced integration capabilities with other project management and productivity tools will provide a more unified and efficient workflow.
- **Mobile Accessibility:** As remote work becomes more prevalent, mobile-friendly Gantt chart applications are becoming essential, enabling project management on the go.
- **Enhanced Data Visualization:** Future Gantt charts will feature more advanced data visualization options, providing deeper insights into project performance and helping managers make more informed decisions.
## Conclusion
Gantt charts have become an indispensable tool in project management and beyond, providing a clear visual representation of project schedules, tasks, and dependencies. The advent of web technologies and JavaScript libraries has further enhanced their utility, making them interactive, dynamic, and responsive.
If you'd like to see more information on the different possible applications you can have a look at [Top 5 Best Javascript Gantt Chart](https://dev.to/lenormor/top-5-best-javascript-gantt-chart-library-fjg) | lenormor |
1,884,150 | Microsoft Certified Solutions Expert | Program objective Prepare the student to be able to design, manage, install and troubleshoot... | 0 | 2024-06-11T08:40:44 | https://dev.to/dadeinstitute123/microsoft-certified-solutions-expert-201j | Program objective
Prepare the student to be able to design, manage, install and troubleshoot Microsoft Windows Network Infrastructure professionally and efficiently. Upon completion of this training the student will be able to work as a Network and Computer System Administrator, Computer Network Engineer.
Program Description
1- Installing and Configuring Windows 10
Implementing Windows
Prepare for installation requirements
Install Windows
Configure devices and device drivers
Perform post-installation configuration
Implement Windows in an enterprise environment
Configure and Support Core Services
Configure networking
Configure storage
Configure data access and usage
Implement Apps
Configure remote management
Manage and Maintain Windows
Configure updates
Monitor Windows
Configure system and data recovery
Configure authorization and authentication
Configure advanced management tools
2- Installing and Configuring Windows Server 2012
Install and Configure Windows Server 2012.
Describe AD DS.
Manage Active Directory objects.
Automate Active Directory administration.
Implement IPv4.
Implement Dynamic Host Configuration Protocol (DHCP).
Implement Domain Name System (DNS).
Implement IPv6.
Implement local storage.
Share files and printers.
Implement Group Policy.
Use Group Policy Objects (GPOs) to secure Windows Servers.
Implement server virtualization using Hyper-V.
MORE INFO : [microsoft certified solutions expert](https://dadeinstituteoftechnology.com/product/mcsa-server-2012/) | dadeinstitute123 | |
1,884,149 | The Ultimate Guide to Monasteries in Manali | Manali, nestled in the scenic hills of Himachal Pradesh, is not only renowned for its breathtaking... | 0 | 2024-06-11T08:40:27 | https://dev.to/mohit_sen_1dac72bd3632b71/the-ultimate-guide-to-monasteries-in-manali-178d | startup | Manali, nestled in the scenic hills of Himachal Pradesh, is not only renowned for its breathtaking landscapes and adventure activities but also for its serene monasteries that reflect the region's rich cultural and spiritual heritage. This guide explores the enchanting monasteries in Manali, highlighting their significance, architecture, and the spiritual experiences they offer to visitors in 2024.
**Introduction to Monasteries in Manali
Cultural and Spiritual Hub**
Manali's monasteries serve as spiritual centers and cultural landmarks, attracting visitors from around the world seeking tranquility and enlightenment. Each monastery exudes a unique charm, blending Tibetan and Indian architectural styles with serene surroundings amidst the Himalayan mountains.(https://iamnavigato.com/the-ultimate-guide-to-monasteries-in-manali/)
**Key Monasteries to Explore**
**1. Hadimba Devi Temple
Location: Old Manali
**
Description: Also known as Dhungri Temple, Hadimba Devi Temple is one of the oldest and most prominent monasteries in Manali. Dedicated to Goddess Hadimba, the temple is surrounded by cedar forests and features intricate wooden carvings and a pagoda-style roof. Visitors can participate in religious rituals and witness local festivals celebrated with traditional fervor.
**2. Gadhan Thekchhokling Gompa Monastery
Location: Old Manali**
Description: Gadhan Thekchhokling Gompa, commonly known as Manali Gompa, is a Tibetan monastery renowned for its vibrant architecture and serene ambiance. Founded in the 1960s, the monastery houses a large statue of Lord Buddha and colorful frescoes depicting Buddhist teachings. Visitors can attend meditation sessions, interact with resident monks, and explore the monastery's art and artifacts.
**3. Himalayan Nyingmapa Gompa
Location: Manali Town**
Description: The Himalayan Nyingmapa Gompa, situated near the Mall Road in Manali, is a peaceful retreat offering panoramic views of the Beas River valley. Established by the revered Ven. Padmasambhava Rinpoche, the monastery features traditional Tibetan architecture with prayer wheels, stupas, and prayer flags adorning the premises. Visitors can join chanting sessions and witness religious ceremonies conducted by resident monks.
**4. Tibetan Monastery
Location: Near Mall Road, Manali**
Description: The Tibetan Monastery in Manali is a cultural center that preserves Tibetan art, culture, and traditions. It houses a handicrafts center where visitors can purchase authentic Tibetan artifacts, including thangka paintings, prayer wheels, and Tibetan carpets. The monastery also offers classes in Tibetan language and Buddhist philosophy, providing insights into Tibetan culture.
**Spiritual Experiences and Activities
Meditation and Retreats**
Many monasteries in Manali offer meditation retreats and mindfulness sessions for spiritual seekers. These retreats provide a serene environment conducive to introspection and inner peace, guided by experienced meditation teachers and resident monks.
**Buddhist Teachings and Philosophy**
Visitors interested in Buddhist teachings and philosophy can attend lectures, workshops, and discussions organized by monasteries in Manali. Resident monks often share insights into Buddhist principles such as compassion, mindfulness, and the path to enlightenment, offering profound spiritual guidance.
**Cultural Significance and Festivals
Festivals and Celebrations**
Monasteries in Manali celebrate various Tibetan and Buddhist festivals with great enthusiasm. Visitors can witness colorful rituals, masked dances, and traditional performances during festivals like Losar (Tibetan New Year), Buddha Purnima, and Guru Rinpoche's birthday. These festivals offer a glimpse into Tibetan culture and spiritual traditions.
**Planning Your Visit
Best Time to Visit**
The best time to visit monasteries in Manali is during the summer months from March to June and the autumn months from September to November. The weather is pleasant, making it ideal for sightseeing, outdoor activities, and attending cultural events and festivals.(https://iamnavigato.com/the-ultimate-guide-to-monasteries-in-manali/)
**Travel Tips**
Respect Cultural Norms: Dress modestly and respectfully when visiting monasteries, and adhere to local customs and traditions.
Photography: Seek permission before taking photographs inside monasteries, especially during religious ceremonies and rituals.
Local Cuisine: Explore Tibetan cuisine at nearby eateries, known for delicious momos (dumplings), thukpa (noodle soup), and butter tea.
**Conclusion**
Monasteries in Manali offer a profound spiritual and cultural experience amidst the stunning landscapes of the Himalayas. Whether you're drawn to meditation and mindfulness, fascinated by Tibetan art and architecture, or simply seeking serenity in the mountains, these monasteries promise an enriching journey of discovery. Plan your visit to the monasteries in Manali and immerse yourself in the timeless wisdom and tranquility of this Himalayan region in 2024.
| mohit_sen_1dac72bd3632b71 |
1,884,148 | API7 API Gateway Performance Benchmark: P99 = 2.3 ms & 160k QPS | API7 Enterprise is a full API lifecycle management solution based on Apache APISIX. It seamlessly... | 0 | 2024-06-11T08:39:12 | https://api7.ai/blog/api7-enterprise-performance-testing-benchmarks | [API7 Enterprise](https://api7.ai/enterprise) is a full API lifecycle management solution based on Apache APISIX. It seamlessly integrates with DevOps and CI/CD workflows, providing excellent product performance and security, while supporting enterprise-level deployment requirements across regions.
We provide detailed performance benchmark tests and performance testing suites to help users conduct performance evaluations and obtain specific, reliable, and feasible data metrics. Additionally, we offer standardized testing procedures, methods, and performance optimization techniques to ensure that users can achieve consistent test results by taking our configurations and scenarios references.
We conducted targeted tests on key features such as single routing, multiple routing, authentication, and rate limiting. The test results demonstrate that API7 Enterprise performs exceptionally well in critical metrics such as concurrent requests and response latency, easily handling high-concurrency access and safeguarding enterprise-level API management.
## Performance Testing Benchmarks
The tests were conducted in an AWS Kubernetes environment and comprehensively evaluated the performance of API7 Gateway in several typical scenarios, including that with no plugins enabled, with only rate limiting or authentication plugins enabled, and with multiple plugins enabled simultaneously.
To accurately evaluate the performance metrics of API7 Gateway, we first conducted baseline tests and collected the results. In the baseline tests, we deployed API7 Gateway with 1 `worker_process`, NGINX upstream, and the load testing tool wrk on the same machine, using the host network mode for communication. Detailed results can be found in [*How to Establish Performance Benchmarks*](https://docs.api7.ai/enterprise/performance/benchmark). Under the interference of a networkless environment, API7 Gateway achieved a single-core QPS (queries per second) of **23,652.91** and maintained a latency of **less than 0.1 milliseconds** in a single routing configuration.
Subsequently, we changed the deployment architecture to simulate the deployment method in a user's production environment. Specifically, we deployed API7 Gateway, NGINX upstream, and the load testing tool wrk on different nodes within a Kubernetes cluster.
The test results show that in a scenario configuring with a single routing, API7 Gateway can support a QPS of up to **167,019.37** requests per second, with **95%** of the client request latency **below 2.16 milliseconds**. Even in complex scenarios with **100 routes and 100 consumers**, and with authentication and rate-limiting plugins enabled simultaneously, the QPS still reaches **133,782.95**, with **95%** of the client request latency **below 2.3 milliseconds**.
This data fully demonstrates that API7 Gateway can maintain high performance and stability even in complex scenarios. Whether in basic or complex scenarios, API7 Gateway can provide efficient and reliable API management services.
### Performance Benchmarking Results
| **Test Scenarios** | **Number of Routes/Consumers** | **Forward to Upstream** | **QPS** | **P99 (MS)** | **P95 (MS)** |
| :--------- | :------ | :---- | :---- | :---- | :---- |
| Only enable `mocking` plugin | 1 route, 0 consumer | False | 310,392.07 | 1.16 | 1.08 |
| No plugins enabled | 1 route, 0 consumer | True | 167,019.37 | 2.3 | 2.16 |
| No plugins enabled | 100 routes, 0 consumer | True |162,753.17 | 2.31 | 2.16 |
| Only enable `limit-count` plugin | 1 route, 0 consumer | True | 145,370.10 | 2.43 | 2.24 |
| Only enable `limit-count` plugin | 100 routes, 0 consumer | True | 143,108.40 | 2.45 | 2.25 |
| Only enable `key-auth` plugin | 1 route, 0 consumer | True | 147,869.49 | 2.41 | 2.22 |
| Only enable `key-auth` plugin | 100 routes, 0 consumer | True | 145,070.93 | 2.43 | 2.25 |
| Enable both `key-auth` and `limit-count` plugins | 1 route, 0 consumers | True | 136,725.47 | 2.43 | 2.26 |
| Enable both `key-auth` and `limit-count` plugins | 100 routes, 0 consumer | True | 133,782.95 | 2.48 | 2.3 |
### Deployment Topology
### Performance Testing Suite
We recognize the importance of performance for an API gateway, so we will continue to optimize and improve the performance of API7 Enterprise. In addition to referring to the [*Performance Testing Benchmarks*](https://docs.api7.ai/enterprise/performance/performance-testing), you can also access the publicly available [Performance Benchmark Repository](https://github.com/api7/api7-gateway-performance-benchmark) for API7 Enterprise. This repository provides detailed records of the resource deployment configurations used for testing and specific configuration information for various test scenarios. Through this repository, you can conduct performance benchmark testing on the API7 Gateway based on the provided guidelines to gain a more comprehensive understanding of its performance.
Before conducting the tests, we strongly recommend ensuring that the [*Performance Baseline*](https://docs.api7.ai/enterprise/performance/benchmark) you are testing is consistent with the officially published testing conditions to ensure the accuracy of the test results. For environment preparation and detailed testing steps for AWS EKS, we recommend referring to the document [*How to Prepare for the AWS EKS Environment*](https://docs.api7.ai/enterprise/performance/aws-eks), which includes detailed environment preparation and testing steps. With the provided performance testing benchmarks, the related repository, and testing guidelines, we believe you will be able to better evaluate the performance of API7 Enterprise and make more informed decisions.
## Benefits of Performance Test Reports
Performance testing benchmarks provide comprehensive performance references for enterprises in selecting, deploying, and optimizing API7 Enterprise, serving as an important basis for ensuring stable system operation. They showcase specific performance metrics of the product in aspects such as response time, throughput, and concurrent access capability, helping enterprises objectively assess whether the product can meet their business needs.
Additionally, the data in performance testing benchmarks provides reliable guidance for enterprises to plan the hardware resource configuration and cluster scale of API7 Enterprise. These benchmarks can help enterprises identify system bottlenecks in advance and formulate response measures to avoid business interruptions.
## Embark on a Journey with API7 Enterprise
API7 Enterprise provides comprehensive digital tools and solutions to help enterprises easily achieve business digitization. It enables unified data management and analysis, offers visualized business processes and collaborative work functions, and possesses robust security and compliance controls.
API7 Enterprise supports flexible deployment methods and seamlessly integrates with existing IT infrastructure. With its powerful features and wide range of application scenarios, enterprises can enhance their competitiveness and adaptability, opening the door to a better digital future.
Experience [API7 Enterprise](https://api7.ai/enterprise) now and embark on your digital transformation journey! | yilialinn | |
1,884,147 | Understanding Angular Life Cycle Hooks: A Comprehensive Guide | When working with Angular, it's essential to understand the lifecycle of a component. Angular... | 0 | 2024-06-11T08:38:58 | https://dev.to/manthanank/understanding-angular-life-cycle-hooks-a-comprehensive-guide-34oa | webdev, javascript, beginners, angular | When working with Angular, it's essential to understand the lifecycle of a component. Angular provides several lifecycle hooks that allow you to tap into different phases of a component's existence, from creation to destruction. This blog will explore these lifecycle hooks, illustrating their use with code examples.
## What Are Angular Life Cycle Hooks?
Lifecycle hooks are methods Angular calls during the various phases of a component's lifecycle. These hooks provide opportunities to execute custom logic at critical points in a component's existence. The primary lifecycle hooks in Angular are:
1. **ngOnChanges**
2. **ngOnInit**
3. **ngDoCheck**
4. **ngAfterContentInit**
5. **ngAfterContentChecked**
6. **ngAfterViewInit**
7. **ngAfterViewChecked**
8. **ngOnDestroy**
Let's dive into each of these hooks with code examples.
## 1. ngOnChanges
`ngOnChanges` is called before `ngOnInit` and whenever one or more data-bound input properties change. It receives a `SimpleChanges` object that contains the current and previous property values.
```typescript
import { Component, Input, OnChanges, SimpleChanges } from '@angular/core';
@Component({
selector: 'app-on-changes-example',
template: `<p>{{ data }}</p>`
})
export class OnChangesExampleComponent implements OnChanges {
@Input() data: string;
ngOnChanges(changes: SimpleChanges) {
console.log('ngOnChanges - data changed:', changes);
}
}
```
## 2. ngOnInit
`ngOnInit` is called once, after the first `ngOnChanges`. It's typically used for component initialization and fetching data.
```typescript
import { Component, OnInit } from '@angular/core';
@Component({
selector: 'app-on-init-example',
template: `<p>ngOnInit example works!</p>`
})
export class OnInitExampleComponent implements OnInit {
ngOnInit() {
console.log('ngOnInit - component initialized');
}
}
```
## 3. ngDoCheck
`ngDoCheck` is called during every change detection run, allowing you to implement your custom change detection.
```typescript
import { Component, DoCheck } from '@angular/core';
@Component({
selector: 'app-do-check-example',
template: `<p>ngDoCheck example works!</p>`
})
export class DoCheckExampleComponent implements DoCheck {
ngDoCheck() {
console.log('ngDoCheck - custom change detection');
}
}
```
## 4. ngAfterContentInit
`ngAfterContentInit` is called once after Angular projects external content into the component's view.
```typescript
import { Component, AfterContentInit, ContentChild } from '@angular/core';
@Component({
selector: 'app-after-content-init-example',
template: `<ng-content></ng-content>`
})
export class AfterContentInitExampleComponent implements AfterContentInit {
@ContentChild('projectedContent') content;
ngAfterContentInit() {
console.log('ngAfterContentInit - content initialized', this.content);
}
}
```
## 5. ngAfterContentChecked
`ngAfterContentChecked` is called after every check of projected content.
```typescript
import { Component, AfterContentChecked, ContentChild } from '@angular/core';
@Component({
selector: 'app-after-content-checked-example',
template: `<ng-content></ng-content>`
})
export class AfterContentCheckedExampleComponent implements AfterContentChecked {
@ContentChild('projectedContent') content;
ngAfterContentChecked() {
console.log('ngAfterContentChecked - content checked', this.content);
}
}
```
## 6. ngAfterViewInit
`ngAfterViewInit` is called once after the component's view and its child views have been initialized.
```typescript
import { Component, AfterViewInit, ViewChild } from '@angular/core';
@Component({
selector: 'app-after-view-init-example',
template: `<p #viewChildElement>View Child</p>`
})
export class AfterViewInitExampleComponent implements AfterViewInit {
@ViewChild('viewChildElement') viewChild;
ngAfterViewInit() {
console.log('ngAfterViewInit - view initialized', this.viewChild);
}
}
```
## 7. ngAfterViewChecked
`ngAfterViewChecked` is called after every check of the component's view and its child views.
```typescript
import { Component, AfterViewChecked, ViewChild } from '@angular/core';
@Component({
selector: 'app-after-view-checked-example',
template: `<p #viewChildElement>View Child</p>`
})
export class AfterViewCheckedExampleComponent implements AfterViewChecked {
@ViewChild('viewChildElement') viewChild;
ngAfterViewChecked() {
console.log('ngAfterViewChecked - view checked', this.viewChild);
}
}
```
## 8. ngOnDestroy
`ngOnDestroy` is called just before Angular destroys the component. This hook is typically used for cleanup, such as unsubscribing from observables and detaching event handlers.
```typescript
import { Component, OnDestroy } from '@angular/core';
@Component({
selector: 'app-on-destroy-example',
template: `<p>ngOnDestroy example works!</p>`
})
export class OnDestroyExampleComponent implements OnDestroy {
ngOnDestroy() {
console.log('ngOnDestroy - component destroyed');
}
}
```
## Conclusion
Understanding Angular's lifecycle hooks is crucial for building robust, efficient, and maintainable applications. These hooks provide precise control over component initialization, changes, and destruction, enabling you to implement custom logic at each stage of a component's lifecycle. By mastering these hooks, you can ensure that your Angular applications behave as expected and perform optimally.
Happy coding!
## Exploring the Code
Visit the [GitHub repository](https://github.com/manthanank/angular-examples/tree/life-cycle-hooks) to explore the code in detail.
--- | manthanank |
1,884,146 | Laravel'de Carbon Kütüphanesini Yerelleştirme | Carbon, yerelleştirme için setLocale metodunu kullanır. Uygulamanızın servis sağlayıcısında veya bir... | 0 | 2024-06-11T08:38:44 | https://dev.to/baris/laravelde-carbon-kutuphanesini-yerellestirme-2fn3 | Carbon, yerelleştirme için `setLocale` metodunu kullanır. Uygulamanızın servis sağlayıcısında veya bir middleware içinde bu ayarı yapabilirsiniz.
`AppServiceProvider` içine yerleştirerek Carbon'un yerelleştirme ayarlarını yapabilirsiniz:
```php
namespace App\Providers;
use Illuminate\Support\ServiceProvider;
use Carbon\Carbon;
class AppServiceProvider extends ServiceProvider
{
public function boot()
{
Carbon::setLocale(config('app.locale'));
}
}
```
Bu örnekte, Laravel'in varsayılan dil ayarı olan `app.locale` değeri kullanılarak Carbon'un dili ayarlanır. `config/app.php` dosyasında `locale` ayarının `tr` olarak ayarlandığından emin olun:
```php
'locale' => 'tr',
```
##### Yerelleştirilmiş Tarih ve Saat Formatlarını Kullanma
Carbon, yerelleştirilmiş formatlarda tarih ve saat görüntülemek için çeşitli metodlar sunar:
```php
$now = Carbon::now();
echo $now->isoFormat('LLLL'); // Örneğin, "Çarşamba, 15 Haziran 2024 14:23" gibi bir çıktı verir.
```
veya
```php
$now = Carbon::now();
echo $now->translatedFormat('m/d/Y h:i a');
```
Gördüğünüz gibi Laravel'de Carbon kütüphanesini yerelleştirmek oldukça basit. `AppServiceProvider` içinde Carbon'un dilini ayarlayarak ve Laravel'in yerelleştirme dosyalarını yapılandırarak tarih ve saat bilgilerini istediğiniz dilde görüntüleyebilirsiniz. Bu sayede, uygulamanızın kullanıcıları kendi dillerinde daha anlaşılır ve kullanıcı dostu bir deneyim yaşarlar. | baris | |
1,884,145 | Safety First: The Importance of Fire Escape Masks in Emergency Situations | Safety First: The Significance Of Fire Escape Masks in Emergency Situations Introduction: In case... | 0 | 2024-06-11T08:36:48 | https://dev.to/daniel_rahnket_3442df0a4e/safety-first-the-importance-of-fire-escape-masks-in-emergency-situations-3l0 | design |
Safety First: The Significance Of Fire Escape Masks in Emergency Situations
Introduction:
In case of the fire crisis, safeguards should be the concern that are top. fire escape equipment outbreaks can happen when you need and will happen damage that are significant our providers plus home. Consequently, you'll want to forward prepare well of the time. Fire safeguards items, like fire escape masks, is really a technique which is great shield your loved ones with the harmful aftereffects of fire smoke.
Advantages:
Fire escape masks has importance that is many. First, they are created to filter smoke that has been gases which can be harmful. It shall aid in preventing problems that was breathing more circumstances caused by inhaling chemicals plus gases. second, fire escape BREATHING APPARATUS masks was portable, user-friendly, plus dependable. They may be effectively spared in a event that was situation that is small accessed quickly in case of an circumstances which was urgent. Third, fire escape masks might force away conditions plus flames, which are generally specifically important into the brief moments that is 1st are few the fire starts.
Innovation:
Fire escape masks came an means which is straightforward are longer regards to innovation. Today's masks is built use that was making of that are higher level content which build them more durable plus effective. Some masks have actually vital atmosphere tanks, which allow users to climate which was inhale the period that are extended. Additional masks has carbon which are integral sensors, which could determine dangerous degrees of petrol plus people that are alert evacuate right away. New mask designs ensure a better furthermore face that is complement are different plus forms, consequently increasing their effectiveness.
Protection:
Fire escape masks is an security which will be important that should be found in every homely household plus business. They could be able dramatically improve the probability of achievements in case of the fire crisis. Fire smoke have actually particles that are toxic like carbon monoxide, that may effortlessly become life-threatening. Consequently, minus the safeguards which are best connection with smoke causes death since injuries that are severe. Plus fire escape masks, you might have the reassurance it out of the building precisely you are capable of inhale environment that was clean boosting your odds of making.
Use:
Fire escape masks are actually simple to use. Firstly, you will need to look at handbook which are individual accompany the mask entirely. Using the mask might vary with regards to the type of FIRE ESCAPE EQUIPMENT mask purchased. Most of the time, the mask needs to be put through the mind that is general plus the straps was modified to make sure the fit that are tight. It's important to work out gaining the mask, so it shall be simple and easy effortless when the need arises. Train your home plus peers to make use of the masks aswell, this might help quantity which was saving of in an emergency to ensure the person that is average up being safer.
Service plus Quality:
In relation to fire escape masks, quality plus option would be critical. It's important to masks being purchasing reputable businesses that concentrate on complete protection services and products. You will want to regularly browse the integrity related to masks, in addition to into the circumstances which was real of good use since damage, immediately replace the mask. Proper care should be ingested saving the masks, and also they try retained in an exceedingly close, dry, plus location that has been simple to reach. Close solution, feel it consumer care because after-sales help, is frequently important in building trust plus making sure your shall obtain an product that are dependable.
Application:
Fire escape masks have actually really applications which are diverse might feeling useful in various settings. In home, they might be present in kitchen area in the eventuality of your kitchen kitchen stove since number fire exactly like they could be employed in any region which can be found the eventuality of smoke starting the houses. In-office buildings, fire escape masks can be used for fire drills plus put in designated areas just in case there exists a crisis. In factories plus structures fire that is being are commercial masks might be utilized to evacuate employees correctly.
Obtaining the fire escape mask easily available is very important, either to be utilized into the homes that are real face to face. They are able to save lives, protecting individuals from the toxic gases which can be added to the fire. With their FIRE RESCUE EQUIPMENT importance plus innovations, fire escape masks are receiving become an right part that will be essential of family relations' plus organization's security arrange. Either you are looking for processes to shield families, their staff, because oneself, fire escape masks is an affordable, dependable, plus component which will be critical of protection arrange that prioritizes safety first. | daniel_rahnket_3442df0a4e |
1,884,144 | 8 Stunning Beaches in Pondicherry You Must Visit | Pondicherry, known for its blend of French colonial heritage and coastal charm, boasts a collection... | 0 | 2024-06-11T08:33:47 | https://dev.to/mohit_sen_1dac72bd3632b71/8-stunning-beaches-in-pondicherry-you-must-visit-1166 | startup | Pondicherry, known for its blend of French colonial heritage and coastal charm, boasts a collection of pristine beaches along the Bay of Bengal. Each beach offers unique experiences, from tranquil sunsets to thrilling water sports. Explore these 8 stunning beaches in Pondicherry that should be on every traveler's itinerary in 2024.
1. Paradise Beach (Plage Paradiso)
Tranquil Seclusion
Paradise Beach, also known as Plage Paradiso, is a secluded haven accessible only by boat from Chunnambar Boat House. The beach is renowned for its golden sands, crystal-clear waters, and lush greenery. Visitors can relax under palm trees, indulge in beachside picnics, or enjoy thrilling water sports like kayaking and jet skiing.(https://iamnavigato.com/8-stunning-beaches-in-pondicherry-you-must-visit/)
2. Promenade Beach (Goubert Avenue)
Colonial Charm
Promenade Beach, stretching along Goubert Avenue, is a symbol of Pondicherry's colonial past. Lined with heritage buildings and iconic landmarks like the Gandhi Statue, this beach promenade offers panoramic views of the Bay of Bengal. It's a popular spot for leisurely walks, jogging, and witnessing stunning sunrises and sunsets.
3. Auroville Beach
Serene Retreat
Auroville Beach, located near the experimental township of Auroville, is known for its serene and laid-back atmosphere. The beach is less crowded, making it ideal for relaxation and meditation. Visitors can explore nearby cafes, indulge in beachside yoga sessions, or simply soak in the tranquility of the surroundings.
4. Serenity Beach
Surfing Paradise
Serenity Beach is a haven for surfing enthusiasts seeking thrilling waves and adrenaline-pumping rides. The beach is known for its consistent surf breaks and surfing schools offering lessons for beginners and advanced surfers alike. Spectacular sunsets and beachside shacks add to the charm of this vibrant surfing destination.
5. Mahe Beach
Scenic Beauty
Mahe Beach, located near the Tamil Nadu border, is known for its pristine shoreline and scenic beauty. The beach offers panoramic views of the azure sea and is surrounded by lush greenery. Visitors can relax on the soft sands, take leisurely walks, or explore nearby fishing villages to experience local culture and cuisine.
6. Karaikal Beach
Cultural Hub
Karaikal Beach, situated in the Karaikal region of Pondicherry, is a cultural hub offering a glimpse into the region's history and traditions. The beach is dotted with temples, churches, and historical landmarks, reflecting its rich heritage. Visitors can participate in religious festivals, explore local markets, and indulge in authentic cuisine.
7. Veerampattinam Beach
Fishing Village Charm
Veerampattinam Beach, located north of Pondicherry, exudes the charm of a traditional fishing village. The beach is known for its colorful fishing boats, bustling fish markets, and vibrant local life. Visitors can witness fishermen at work, sample fresh seafood delicacies, and explore the rustic beauty of the coastal village.
8. Quiet Beach (Serenity Beach Extension)
Secluded Relaxation
Quiet Beach, also known as Serenity Beach Extension, offers a secluded retreat away from the bustling city. The beach is ideal for solitude seekers and nature enthusiasts looking to unwind amidst peaceful surroundings. Visitors can enjoy leisurely walks, birdwatching, or simply bask in the tranquility of the unspoiled shoreline.
Planning Your Beach Tour
Best Time to Visit
The best time to visit Pondicherry's beaches is during the winter months from October to March, when the weather is mild and pleasant. This period is perfect for enjoying outdoor activities, water sports, and witnessing stunning sunsets by the sea.(https://iamnavigato.com/8-stunning-beaches-in-pondicherry-you-must-visit/)
Travel Tips
Sun Protection: Pack sunscreen, hats, and sunglasses to protect against sunburn during daytime visits.
Water Activities: Check availability and safety guidelines for water sports activities such as surfing, kayaking, and snorkeling.
Local Etiquette: Respect local customs and traditions, and dispose of trash responsibly to help preserve the natural beauty of the beaches.
Conclusion
Pondicherry's beaches offer a delightful mix of natural beauty, cultural heritage, and recreational opportunities for visitors of all interests. Whether you're seeking adventure, relaxation, or cultural immersion, these 8 stunning beaches promise unforgettable experiences in the heart of this coastal paradise. Plan your beach tour of Pondicherry and discover the diverse charm of each destination in 2024. | mohit_sen_1dac72bd3632b71 |
1,884,143 | Nuxt build vs Nuxt Generate what is the difference? | What is the difference ? In the nuxt docs for Cloudflare deployment... | 0 | 2024-06-11T08:33:32 | https://dev.to/leamsigc/nuxt-build-vs-nuxt-generate-what-is-the-difference-759 | nuxt, vue, tutorial, programming | ### What is the difference ?
In the nuxt docs for Cloudflare deployment ([https://nuxt.com/deploy/cloudflare](https://nuxt.com/deploy/cloudflare)), it mentions two options of nuxt build or nuxt generate. It says:
"To leverage server-side rendering on the edge, set the build command to: nuxt build
vs
To statically generate your website, set the build command to: nuxt generate"
What are the pros and cons to each approach here?
Is it as simple as SSR vs SPA?
Will it matter if for example I choose nuxt build for SSR but have areas in my app that are [ClientOnly] ?
### Simple answer:
***Nuxt generate creates static files that can be served statically on a CDN, without the need for a server running an application process
"generate" runs through the static-site-generation (SSG) process and outputs static html/css/js files. There is no running server with this option.***
***Nuxt build creates a node app that requires a server to run.***
***"build" creates a server that runs and processes every request
##### Note
> It’s confusing because Cloudflare pages used to be for static hosting only. Now it supports SSR too. Just connect your repo via Cloudflare pages and it will take care of the rest for you
[nuxt-monorepo-layers](https://github.com/leamsigc/nuxt-monorepo-layers)
> Please if anyone have a better way please comment below and let's learn together
{% gist https://gist.github.com/leamsigc/68d3f891d9298c35de273caa2b21e453 %}
> Working on the audio version
[The Loop VueJs Podcast](https://podcasters.spotify.com/pod/show/the-loop-vuejs/episodes/Nuxt-build-vs-Nuxt-Generate--What-is-the-difference-e2kogno) | leamsigc |
1,884,142 | Internship for IT students | Kaashiv Infotech offers a comprehensive internship for it students designed to provide hands-on... | 0 | 2024-06-11T08:31:05 | https://dev.to/abitecpuram22/internship-for-it-students-54nl | Kaashiv Infotech offers a comprehensive <a href=”https://www.kaashivinfotech.com/internship-for-it-students/”>internship for it students</a> designed to provide hands-on experience and practical knowledge in various IT fields. Students can select from multiple areas such as web development, software engineering, data science, cloud computing, cybersecurity, and mobile app development. During the <a href=”https://www.kaashivinfotech.com/internship-for-it-students/”>internship for it students</a>, participants work on real-world projects, enhancing their technical skills and understanding of industry practices. Experienced mentors guide interns through the projects, ensuring they gain valuable insights and expertise. The program also includes workshops and training sessions on the latest technologies and tools used in the IT industry. By the end of the <a href=”https://www.kaashivinfotech.com/internship-for-it-students/”>internship for it students</a>, participants are well-equipped with the necessary skills and experience to excel in their careers. Kaashiv Infotech's internship for it students is an excellent opportunity for IT students to bridge the gap between academic knowledge and professional requirements, preparing them for future job roles in the technology sector. | abitecpuram22 | |
1,884,140 | Confusion Matrix: A Clear Guide to Understanding It | Are you struggling to understand the Confusion Matrix? You're not alone. Despite its name, the... | 0 | 2024-06-11T08:27:04 | https://dev.to/yaswanthteja/confusion-matrix-a-clear-guide-to-understanding-it-4e0p | machinelearning, datascience, confusionmatrix |
Are you struggling to understand the Confusion Matrix? You're not alone. Despite its name, the Confusion Matrix can be quite perplexing for many. However, we're here to simplify it for you.
### What is a Confusion Matrix?
A Confusion Matrix is a crucial tool in machine learning and statistics. It helps you evaluate the performance of a classification algorithm. By breaking down the true positives, true negatives, false positives, and false negatives, you can gain a clear picture of how well your model is performing.
### Why is the Confusion Matrix Important?
- Performance Measurement: It provides detailed insight into the performance of your classification model.
- Error Analysis: Helps identify where your model is making mistakes, allowing for targeted improvements.
- Model Comparison: Essential for comparing different models to select the best one.
### Why is it called a "Confusion" Matrix?
Because it shows where the model gets "confused" in its predictions.
### How to Interpret a Confusion Matrix?
- True Positive(TP): Positive events are correctly classified as Positive.
- True Negative(TN): Negative events are correctly classified as Negative.
- False Positive(FP): (Type 1 Error) Negative values are incorrectly classified as Positive.
- False Negative(FN): (Type 2 Error) Positive values are incorrectly classified as Negative.
we discuss these more clearly as we move further.
The performance of the classification model is evaluated using a confusion matrix. I’m sure most of us have gone through this concept several times and still find it confusing. And realized why it is named confusion matrix.
In supervised learning, if the target variable is categorial, then the classification model has to classify given test data into respective categories. The efficiency of classified data to respective categories is checked using a confusion matrix. For simplicity let’s consider binary classification.
The results of the classification model can be categorized into four types:
- **True Positive(TP)**: Correctly predicted positive observations.
- Cases where the model correctly predicts the class or events as positive.
Eg1: You think you’ll love the new pizza place,
and you do!
Eg2: A patient has got heart disease and the model predicts the same.
- **True Negative(TN)**: Negative events are correctly classified as Negative.
- Cases where the model correctly predicts the class or events as negative.
Eg: You think you won't enjoy that new movie, and you don’t.
Eg: A patient does not have heart disease and the model predicts that the patient is all right.
- **False Positive(FP)**: (Type 1 Error)
Incorrectly predicted positive observations (Type I error).
- Cases where the model incorrectly predicts the positive class (Type I error).
Eg: You think that weirdly flavored ice cream will be great, but it’s a disaster.
Eg: A patient does not have heart disease but the model predicts the patient has heart disease.
- **False Negative(FN)** : (Type 2 Error)
Incorrectly predicted negative observations (Type II error).
- Cases where the model incorrectly predicts the negative class (Type II error).
Eg: You skip that boring-looking book, only to find out later it’s amazing.
Eg: A patient has heart disease but the model predicts as the patient does not have heart disease.
### Construction of Confusion Matrix
Here are a few steps to write the confusion matrix: Let’s consider two characters XY where X can be True or False and Y can take the value Positive or Negative.
**Step 1**: Fill in the confusion matrix for character Y. It is solely based on predicted value, if the prediction is true then it’s Positive otherwise it’s Negative.
**Step 2**: Fill in the first character X. Compare the actual with the predicted if both are of the same category say Actual is True and Predicted is True fill T (i.e. True), else fill F (i.e. False).
Now it’s time to check the performance of classification using count of TP, FN, FP, and TN.
Evaluation metrics
Consider there are nine Positive and nine Negative actual values out of which few are incorrectly classified by the model.
### Key Metrics Derived from the Confusion Matrix:
- Accuracy: (TP + TN) / (TP + TN + FP + FN)
- Precision: TP / (TP + FP)
- Recall: TP / (TP + FN)
- F1 Score: 2 * (Precision * Recall) / (Precision + Recall)
**Recall /True Positive Rate (TPR)/Sensitivity**: It tells us among actual true events how many are correctly predicted as true.
```
Recall = TP / (TP + FN)
```
**Precision**: Out of all events that are predicted as positive how many are actually positive?
```
Precision = TP / (TP + FP)
```
**Accuracy**: It tells, out of all events how many are predicted correctly.
```
Accuracy = ( TP + TN) /(TP + TN + FP + FN )
```
Accuracy gives the same importance to positive and negative events hence use this when we have a balanced data set. Otherwise, the majority might bias the minority class.
The higher the value of Recall, Precision, and Accuracy better the model.
Misclassification rate (Error Rate): How many are wrongly classified w.r.t total number of values.
```
Error Rate = (FP + FN) / (TP + TN + FP + FN)
```
False Positive Rate(FPR)/ Specificity: The number of values that are wrongly classified as positive w.r.t the total number of actual negative values.
```
FPR = FP / (FP + TN)
```
**F Score**: There is a chance that precision may be low while recall is high or vice versa, in this scenario, we need to consider both recall and precision to evaluate the model. Hence F Score comes into existence.
```
F score = ( 1 + β ^2)* (Precision)* (Recall)/((Precision * β ^2) + Recall)
```
β factor provides the weightage to Recall and Precision.
- β = 1: Recall and Precision are balanced
- β < 1: Precision oriented evaluation
- β >1: Recall-oriented evaluation
When β = 1 we call it F1 score:
```
F1 score = 2 * Recall * Precision /(Recall + Precision)
```
The higher the F1 score better the model.
Implementation of the confusion matrix
```
import numpy
from sklearn import metrics
from sklearn.metrics import confusion_matrix
from sklearn.metrics import accuracy_score, precision_score,
recall_score, f1_score
actual = [1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0]
predicted = [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,0]
confusion_matrix = metrics.confusion_matrix(actual, predicted)
# Finding precision and recall
accuracy = accuracy_score(actual, predicted)
print("Accuracy :", accuracy)
precision = precision_score(actual, predicted)
print("Precision :", precision)
recall = recall_score(actual, predicted)
print("Recall :", recall)
F1= f1_score(actual, predicted)
print("F1 Score:", F1)
```
```
import seaborn as sns
import matplotlib.pyplot as plt
sns.heatmap(confusion_matrix,
annot=True,
fmt='g',
xticklabels=['0', '1'],
yticklabels=['0', '1'])
plt.ylabel('Actual',fontsize=13)
plt.xlabel('Predicted',fontsize=13)
plt.title('Confusion Matrix',fontsize=17)
plt.show()
```
The trade-off between Recall and Precision:
In real-time scenarios, where it’s okay to have a false positive than a false negative we choose Recall. Eg: Diagnosis of cancer, if the patient has cancer but is diagnosed as negative then the patient’s life is at stake.
Where it’s okay to have false negatives but not false positives we use Precision. Eg: Missing to punish a criminal is better than punishing an innocent person.
### Conclusion
Understanding the Confusion Matrix is essential for anyone working with classification models. By demystifying its components and applications, we hope to make it less confusing and more useful in your data analysis toolkit.
**EndNote:**
I hope you enjoyed the article and gained insight into how to construct the confusion matrix and evaluation matrix like Recall, Precision, F score, and Accuracy. Please drop your suggestions or queries in the comment section.
| yaswanthteja |
1,884,139 | How to create a tooltip with Tailwind CSS and JavaScript | Yeah, you read that right, we are going to create a tooltip with Tailwind CSS and JavaScript. This is... | 0 | 2024-06-11T08:24:32 | https://dev.to/mike_andreuzza/how-to-create-a-tooltip-with-tailwind-css-and-javascript-43kd | javascript, tutorial, tailwindcss | Yeah, you read that right, we are going to create a tooltip with Tailwind CSS and JavaScript. This is a simple and easy to use tooltip that you can use in your projects. We can simply make them with CSS also, but let's use JavaScript for this one, just for the sake of learning how to do it.
[Read the article,See it live and get the code](https://lexingtonthemes.com/tutorials/how-to-create-a-tooltip-with-tailwind-css-and-javascript/)
| mike_andreuzza |
1,884,138 | internship for eee students | Kaashiv Infotech offers internship for eee students , providing practical exposure in areas such as... | 0 | 2024-06-11T08:23:50 | https://dev.to/eeestudents/internship-for-eee-students-4i15 | Kaashiv Infotech offers [internship for eee students](https://www.kaashivinfotech.com/internship-for-eee-students/) , providing practical exposure in areas such as power systems, electronics, and telecommunications. These experiences offer hands-on application of theoretical knowledge, fostering skill enhancement and industry networking. Seek internships at electrical firms, power stations, telecom companies, or research establishments, including opportunities provided by Kaashiv Infotech. Participation in [internship for eee students](https://www.kaashivinfotech.com/internship-for-eee-students/) can enrich comprehension of concepts, forge professional connections, and boost post-graduation job prospects. | eeestudents | |
1,884,137 | International Stardom Aspirations- Sitara Masilamani | Princess Sitara, also known as Sitara Masilamani, is a singer/songwriter, actress, dancer, and model... | 0 | 2024-06-11T08:22:41 | https://dev.to/sitaramasi50677/international-stardom-aspirations-sitara-masilamani-33i1 | Princess Sitara, also known as Sitara Masilamani, is a singer/songwriter, actress, dancer, and model based in Los Angeles, California. Her journey is one of perseverance, passion, and prowess, beginning with her education in Business Management and Marketing at Tulane University. This background in business offers her a unique perspective within the entertainment industry, as she understands the intricacies of marketing and the importance of personal branding.
Following her studies at Tulane, she pursued a course in Beauty Marketing and Product Development at the Fashion Institute of Design & Merchandising (FIDM) in downtown Los Angeles. This exposure to the world of beauty marketing deepened her understanding of aesthetics and presentation, vital elements in her profession as an artist and performer.
Her heritage is also integral to her identity as an artist. Born in Chennai, India, she carries with her the rich cultural traditions of her birthplace, fusing them seamlessly with Western influences to create a truly unique artistic expression. Her goal is not just to achieve success on domestic soil; Princess Sitara aims to become an international superstar, touring worldwide and taking the lead in feature films and TV shows.
Her acting career is marked by her innate ability to embody a wide array of characters, a testament to her versatility as a performer. From early lead roles in school productions to her more recent experiences on screen, she has consistently exhibited an exceptional talent for capturing the emotional essence of her characters. This stems from her rigorous training at the Strassberg Center, where she delved into the intricacies of method acting, honing her ability to tap into her own emotions to deliver authentic performances. As she continues to expand her acting portfolio, Sitara brings a level of depth and sincerity to her roles that truly sets her apart in the industry.
Her unique artistic signature stems from her ability to seamlessly integrate her rich Indian heritage with contemporary Western arts. Her performances are a melting pot of cultures, where the traditional dance forms of Bharatnatyam and Kathak intermingle with the rhythms of ballet, jazz, and hip-hop. Similarly, her music resonates with the ethereal melodies of Indian Carnatic music harmoniously entwined with the pulsating beats of RnB. This fusion not only transcends geographical borders but also amplifies her universal appeal. It's a testament to how she artfully combines her cultural roots with her diverse artistic pursuits, creating a unique brand of art that resonates globally.
Her modeling work has garnered attention from several high-profile brands. From Haus Labs by Lady Gaga to Target, she has been the face of multiple campaigns, showcasing her versatility and appeal. Her inspiration stems from global icons like Beyoncé, Rihanna, Aishwariya Rai, Priyanka Chopra Jonas, Deepika Padukone, Mariah Carey, Nicki Minaj, and Whitney Houston.
Music has been a constant companion for Sitara. From a young age, she has been playing the piano and guitar and writing her own lyrics. Her vocal training spans a range of genres - from classical to RnB to Indian Carnatic music. This array of skills signifies her versatility and commitment to her craft.
In addition to her musical talents, her prowess extends to the world of dance. She has trained in an impressive range of dance styles, from ballet and jazz to contemporary and hip-hop. Her dance training has not only honed her physical agility and endurance but also enhanced her ability to express herself through movement. Her performances are a captivating blend of grace, strength, and emotion, reflective of her diverse training and artistic vision.
Her has an undeniable passion for dance, with the ability to transform rhythm and melody into a captivating visual spectacle. Her dance style is as varied as it is compelling, with proficiency in several traditional and modern styles from ballet, jazz, contemporary, to hip-hop. Notably, her training in Indian dances such as Bharatnatyam and Kathak offers a distinctive edge, allowing her to fuse Eastern and Western dance traditions in her performances. Furthermore, her training with Mitchell Kelly's MKS Jewels Heels program has added a touch of glamour and elegance to her repertoire. Sitara's dance performances are more than just entertainment; they are a testament to her versatility, creativity, and dedication to her craft.
As Princess Sitara, her love for dance is evident. Trained in various dance forms, including ballet, jazz, contemporary, Hollywood, bharatnatyam, kathak, hip hop, and heels, she is a powerhouse of talent. Her training in Mitchell Kelly's MKS Jewels Heels program has added a distinct style to her repertoire, amalgamating Indian styles like Bollywood with Western dance forms.
Her passion for music is deeply rooted and multi-faceted. From playing musical instruments to writing her own lyrics, she has always been drawn to the power of music as a means of self-expression. Her musical journey is characterized by constant learning and innovation, as she continues to explore different genres and refine her skills.
Her journey into the world of acting began early, with lead roles in school productions. Over time, she has honed her acting skills through intensive training and practice. Her ability to portray a wide range of characters and emotions reflects her depth as an actor and her understanding of the human condition. As she continues to evolve as an artist, Princess Sitara remains committed to her craft, consistently pushing her boundaries and exploring new avenues of artistic expression.
Princess Sitara's passion for acting has led her to some impressive accomplishments. From her time in middle and high school, where she was cast in lead roles, to her training in method acting at the Strassberg Center, her acting journey is as diverse as it is impressive. As she continues to shine, she is a testament to the power of passion, talent, and relentless dedication.
| sitaramasi50677 | |
1,884,136 | Headstrong Protection: Advanced Features in Modern Firefighting Helmets | Headstrong Protection: Advanced Features in Modern Firefighting Helmets When firefighters go into... | 0 | 2024-06-11T08:21:51 | https://dev.to/daniel_rahnket_3442df0a4e/headstrong-protection-advanced-features-in-modern-firefighting-helmets-1h3b | design | Headstrong Protection: Advanced Features in Modern Firefighting Helmets
When firefighters go into the burning building, they face the large amount of risks like flames, smoke and falling debris. That is why it's therefore important them safer for them to have protective gear can keep. The main components of protective gear are the firefighting helmet. In modern times, there have been many advancements in firefighting helmet technology. These advancements have made helmets safer, more comfortable and most effective at protecting firefighters. We intend to have a look at a number of the advanced options that come with modern firefighting helmets.
Advantages of Advanced Firefighting Helmets
There are several advantages to using advanced firefighting. Among the primary advantages is safety. Advanced helmets have now been designed to shield FIREFIGHTER HELMET from a variety of hazards, including heat, chemical compounds and impacts. They could also offer better visibility and communication, which will help firefighters work most effortlessly and properly.
An additional good thing about advanced firefighting helmets is pros. Traditional firefighter helmet in many cases are uncomfortable and hefty to place for some very long time. Nevertheless, contemporary helmets are much lighter and most at ease. This could help to reduce weaknesses and let it to be easier for firefighters employed by stretched periods of that time period.
Finally, advanced firefighting helmets might be better at preventing accidents. They're going to help decrease the potential for brain accidents, that are often the absolute most accidents which could be firefighters that are preserve that is severe. They will are typically in a position to furthermore help to lessen the ability of burns and more accidents by supplying the best security.
ff2733c7aa5e6d6bb900ee2381861c206a043ed10b1f2b3ed9c24e30a25fa5d3.jpg
Innovation in Firefighting Helmets
Extremely important components of advanced firefighting helmets is innovation. There were many innovations in helmet technology in the previous few years and these innovations have made helmets safer, more content and more efficient.
A wide range of the most crucial innovations firefighting helmets include:
- Lightweight components: most modern helmets are made of lightweight materials like Kevlar and carbon fiber. These items are stronger and durable, yet much lighter than traditional helmet materials.
- Improved ventilation: Traditional firefighting helmets often did not offer adequate ventilation, which may result in heat fatigue and more trouble. However, modern hFIRE RESCUE EQUIPMENT elmets have improved air flow techniques that permit air best movement and temperature dissipation.
- Integrated communications: Advanced helmets could possibly be constructed with built-in communications systems that enable firefighters to talk to each other quickly and effortlessly. This is particularly crucial in circumstances where firefighters have to coordinate their actions.
- Better exposure: Advanced helmets provide better presence in low light circumstances, making it simpler for firefighters to see precisely what they are starting and avoid dangers.
- Thermal imaging: Some advanced fire rescue equipment are equipped and thermal imaging technology, that could assist firefighters predict smoke and identify hot spots into the burning building.
How to Use Firefighting Helmets
Making use of this firefighting helmet is easy, nonetheless it is vital it correctly to ensure maximum security that you use. Allow me to share some tips about how to use your firefighting helmet:
- Ensure that the helmet fits precisely: a properly fitted helmet be snug, but perhaps not too tight. You should be in a position to freely move their mind, but the helmet should never around wobble or slide.
- Wear the chin band: The chin band is an essential element of helmet, set up during firefighting operations because it can make it possible to help keep it. Make certain the chin strap is secured before you go into the burning building.
- Use the visor: The visor in your helmet is there to guard the face and eyes from heat and debris. Make certain it is employed by your when required.
- Keep the helmet clean: after each and every use, clean up your helmet to eliminate any debris or contaminants which may need accumulated. This could assist to retain the helmet's effectiveness and prolong its lifespan.
Firefighting Helmet Service and Quality
Like most part of firefighting equipment, it is vital that you ensure your helmet is in good working order. What this signifies is having it inspected frequently by way of a qualified technician replacing any damaged or worn-out components because needed.
When selecting a firefighting helmet, additionally it is essential to think of FIRE ESCAPE EQUIPMENT quality. See for helmets which were certified and tested by reputable organizations including the National Fire Protection Association (NFPA). These helmets can need undergone rigorous screening, be sure that they fulfill high criteria of safety and effectiveness.
Applications of Advanced Firefighting Helmets
Advanced firefighting helmets are used in a number of firefighting applications, from fighting building fires to industrial fires to wildland fires. They could also be used by more experts who make use of hazardous surroundings, such as research and rescue groups or dangerous component response groups. | daniel_rahnket_3442df0a4e |
1,884,135 | Collaborative Songwriting: Navigating the Dynamics of Writing with Others by Sitara | Songwriting is often associated with solitary moments of inspiration, but collaborative songwriting... | 0 | 2024-06-11T08:21:28 | https://dev.to/sitaramasi50677/collaborative-songwriting-navigating-the-dynamics-of-writing-with-others-by-sitara-bpp | Songwriting is often associated with solitary moments of inspiration, but collaborative songwriting has emerged as a powerful and enriching process that brings together diverse musical talents. Navigating the dynamics of writing with others is an intricate dance where creativity, communication, and compromise intersect. In this exploration of collaborative songwriting, we will delve into the benefits, challenges, and effective strategies that contribute to the magic of creating music as a collective endeavor.
Unlocking the Benefits of Collaboration:
Collaborative songwriting offers a wealth of benefits beyond the individual artist's capabilities—firstly, pooling diverse talents results in a fusion of ideas, genres, and styles, leading to a more dynamic and innovative final product. Secondly, collaboration fosters a sense of community and shared ownership, enhancing the overall enjoyment of the creative process. Thirdly, working with others allows for skill exchange and learning, contributing to the growth and development of each collaborator. Sitara Masilamani - California
Challenges in Collaborative Songwriting:
While the benefits are substantial, collaborative songwriting has its challenges. Creative differences, conflicting visions, and effective communication can pose hurdles. Balancing individual expression with group dynamics requires skill and patience. Additionally, logistical challenges, such as coordinating schedules and managing diverse contributions, demand careful navigation. Successful collaborative songwriting hinges on addressing these challenges constructively.
Effective Communication Strategies:
Clear and effective communication is the linchpin of successful collaborative songwriting. Sitara elucidates that establishing open channels for dialogue ensures that each contributor's ideas are heard and valued. Regular check-ins, whether in person or through virtual platforms, maintain momentum and allow for swiftly resolving any emerging issues. Utilizing shared documents or project management tools can streamline communication, creating a centralized space for ideas, feedback, and progress updates.
Embracing Diverse Perspectives:
Collaborative songwriting thrives on the richness of diverse perspectives. Each contributor brings unique experiences, influences, and skills to the table. Embracing this diversity enriches the creative process and cultivates a more inclusive and expansive musical landscape. Appreciating and integrating collaborators' varied strengths and perspectives is essential, allowing the collective creation to transcend individual limitations. Princess Sitara
Establishing a Collective Vision:
To navigate the dynamics of collaborative songwriting successfully, collaborators must establish a collective vision for the project. This involves defining the overarching theme, style, and goals, ensuring everyone is aligned in their creative pursuits. A shared vision is a guiding force, providing a cohesive framework within which individual contributions can coexist harmoniously.
Balancing Individual Expression:
Sitara points out that while working towards a collective vision, balancing individual expression within the collaborative process is equally crucial. Each contributor should be free to express their unique voice and contribute ideas that reflect their style. Striking a balance between individual creativity and group cohesion is an art that defines the success of collaborative songwriting. Princess Sitara Masilamani
Utilizing Technology to Facilitate Collaboration:
Technology has become an invaluable ally in collaborative songwriting in the modern age. Virtual collaboration platforms, cloud-based storage, and online communication tools enable seamless collaboration among collaborators regardless of geographical distance. Leveraging technology optimizes the collaborative process, fostering real-time engagement and enhancing the efficiency of the creative workflow.
Adapting and Evolving Together:
Collaborative songwriting is a dynamic journey that requires adaptability and a willingness to evolve together. Collaborators may encounter unexpected turns, inspirations, or challenges as the project progresses. Sitara draws attention to the fact that flexibility and openness to change are essential qualities that ensure the creative process remains fluid and responsive to the collective vision. Sitara Masilamani
Harmonizing Creative Roles:
Collaborators should harmonize their creative roles to optimize the collaborative process. Defining specific roles, whether focused on lyrics, melody, instrumentation, or production, clarifies each individual's responsibilities and enhances the efficiency of the creative workflow.
Maintaining Flexibility in Roles:
While defined roles are beneficial, maintaining flexibility is equally crucial. Sitara highlights that allowing for cross-collaboration and occasional role-switching fosters a dynamic creative environment where contributors can explore various aspects of the songwriting process.
Effective Decision-Making:
Establishing clear decision-making processes ensures that the collaborative project progresses smoothly. Whether through consensus-building, appointed leaders for specific decisions, or democratic voting, a well-defined decision-making framework prevents creative gridlock and maintains momentum.
Resolving Creative Disputes:
In the collaborative songwriting journey, creative disputes may arise. A proactive approach to resolving conflicts is essential. Open discussions, compromise, and a shared commitment to the overarching vision help navigate creative disagreements constructively.
Celebrating Achievements Together:
As the collaborative project reaches milestones, it's crucial to celebrate achievements collectively. Sitara focuses on recognizing and appreciating each contributor's efforts to build a positive and supportive collaborative culture, reinforcing the sense of shared accomplishment.
Feedback as a Constructive Tool:
Regular feedback sessions are integral to the collaborative songwriting process. Constructive feedback fosters improvement and refinement, ensuring the collective work aligns with the established vision. Openness to receiving and implementing feedback is key to collaborative growth.
Sustaining Motivation and Momentum:
Maintaining motivation throughout the collaborative project is essential. Regular check-ins, goal-setting, and acknowledging progress contribute to sustained momentum. Collaborators should work collectively to overcome challenges, keeping the creative energy alive.
Collaborative songwriting is a dynamic journey that thrives on effective communication, diverse perspectives, and a shared commitment to a collective vision. Successful navigation of the dynamics involves harmonizing creative roles, resolving disputes constructively, and sustaining motivation.
By celebrating achievements together, acknowledging individual contributions, and creating a positive collaborative environment, artists can amplify the magic of collective creativity, leaving an enduring impact on the music they create and the broader artistic community.
| sitaramasi50677 | |
1,884,124 | Dokku's /var/lib/docker/overlay2 too big? | Dokku's /var/lib/docker/overlay2 too big? | 0 | 2024-06-11T08:16:46 | https://dev.to/cerico/dokkus-varlibdockeroverlay2-too-big-3cf | dokku, git | ---
title: Dokku's /var/lib/docker/overlay2 too big?
author: ''
published: true
publishDate: Tue Jun 11 2024
displayDate: 11 Jun
cover: 'https://i.ibb.co/swkd4P2/ccc.jpg'
cover_image: 'https://i.ibb.co/swkd4P2/ccc.jpg'
description: Dokku's /var/lib/docker/overlay2 too big?
tags:
- dokku
- git
---
## Dokku's /var/lib/docker/overlay2 too big?
One of the frustrating things about Dokku, is that pushes often report as succesful when they haven't been. The most obvious example is when it didn't trigger a build (see last post for more on that). But another one is if you're out of disk space, and dokku fills up the /var/lib/overlay2 directory with a lot of images. Dokku's own prune command is very conservative and doesn't make much of an impact at all. And deleting anything from this directory is an absolute no no.
Freeing up space more effectively can be done with
```bash
docker system prune -a
```
This freed me up 21G of space. But it is going to fill up again pretty soon, so this is best set up as a cron job with the -f flag to stop it requesting for confirmation
Hit crontab -e and add the following
```bash
56 10 * * * docker system prune -af
```
And this should keep your /var/lib/docker/overlay2 folder in check
| cerico |
1,884,122 | Maximizing ecommerce Potential With Top-notch Magento Extensions | Want to supercharge your online store? we made a list of best Magento Extension! These handy tools... | 0 | 2024-06-11T08:16:07 | https://dev.to/zumvu25/maximizing-ecommerce-potential-with-top-notch-magento-extensions-3on4 | Want to supercharge your online store? we made a list of best [Magento Extension](https://blog.zumvu.com/magento-extensions-for-ecommerce-store/)! These handy tools add extra features to your eCommerce site, making it easier to manage and more appealing to customers.
From making your site easier to find on Google to simplifying your checkout process, these extensions have got you covered. And with our easy-to-read reviews, you'll know exactly what you're getting before you buy.
So if you're ready to take your online store to the next level, check out our main blog for all the details. With the right Magento Extensions, success is just a click away! | zumvu25 | |
1,884,120 | Promise component for React and Vue | This is a Promise-based component encapsulation method. Designed to simplify the handling of... | 0 | 2024-06-11T08:13:17 | https://dev.to/shixianqin/promise-component-for-react-and-vue-29ma | promise, promisecomponent, react, vue | This is a Promise-based component encapsulation method. Designed to simplify the handling of asynchronous input and
output of components. Its design goal is to implement the software engineering concept
of `High-cohesion and Low-coupling`
## Features
### 🔥 Promise-based invocation
Promise-based invocation allows us to flexibly control the asynchronous input and output flow of components. The
component will be invoked internally at the appropriate time
resolve or reject callback. This invocation follows a normalized pattern of asynchronous operation, making the use and
management of components more reliable and consistent.
### 📦 Independence of calls
Each call to the component spawns a new, independent instance. They don't share call state, and they don't have issues
like state caching. Whether the same component is called multiple times in a single page, or multiple instances of the
same component are used in different pages, they are guaranteed to be independent of each other.
### 🙋 Render on demand
Components are rendered only when they are needed. This rendering method can be triggered according to specific events
or external conditions, making the rendering logic more flexible and controllable. For example, we call a component when
a user clicks a button or when a condition is met. This on-demand rendering method can effectively improve page load
speed and performance, while also reducing unnecessary rendering and resource consumption.
### ♻️ Destroy after use
The result of a component's rendering is temporary and will be destroyed as soon as it is finished, similar to the
effect of burning. This feature is ideal for temporary and one-off scenarios, while also improving program performance.
## Integrations
+ [@promise-components/react](https://github.com/promise-components/promise-components/tree/main/packages/react)
+ [@promise-components/vue](https://github.com/promise-components/promise-components/tree/main/packages/vue)
## Example (React)
Let's implement a user list and include the ability to interactively add and edit user information using a dialog box.
### Initialization
You need to use the shared rendering slot of the Promise component in the root component, which will provide a default
rendering location for the Promise components of the entire application and inheritance of the application context (such
as: store, theme, i18n...).
```tsx
// App.tsx
import { SharedSlot } from '@promise-components/react'
function App () {
return (
<div>
...
<SharedSlot/>
</div>
)
}
export default App
```
### Defining a Promise Component
```tsx
// add-user.tsx
import { PromiseComponent, PromiseResolvers } from '@promise-components/react'
import { FormEvent, useState } from 'react'
interface UserItem {
name: string
age: number
id: number
}
/**
* 🔴 The Props parameter must inherit from PromiseResolvers
*/
interface Props extends PromiseResolvers<UserItem> {
user?: UserItem
}
/**
* 🔴 Create a PromiseComponent instance
*/
export const AddUser = new PromiseComponent((props: Props) => {
const [formData, setFormData] = useState(() => {
return {
name: '',
age: 0,
id: Math.random(),
...props.user, // If editing, fill in the default value
}
})
function handleSubmit () {
if (!formData.name) return alert('Please enter `Name`')
if (!formData.age) return alert('Please enter `Age`')
// 🔴 Call resolve callback
props.resolve(formData)
}
function handleCancel () {
// 🔴 Call reject callback
props.reject()
}
function handleInput (key: keyof UserItem) {
return (evt: FormEvent<HTMLInputElement>) => {
setFormData({
...formData,
[key]: evt.currentTarget.value
})
}
}
return (
<dialog open>
<form>
<p>
<span>Name: </span>
<input value={formData.name} onInput={handleInput('name')} type="text"/>
</p>
<p>
<span>Age: </span>
<input value={formData.age} onInput={handleInput('age')} type="number" min={0}/>
</p>
</form>
<p>
<button onClick={handleCancel}>Cancel</button>
<button onClick={handleSubmit}>Submit</button>
</p>
</dialog>
)
})
```
### Using the Promise component
```tsx
// user-list.tsx
import { useState } from 'react'
import { AddUser } from './add-user.tsx'
interface UserItem {
name: string
age: number
id: number
}
export function UserList () {
const [userList, setUserList] = useState<UserItem[]>([])
async function handleAdd () {
/**
* 🔴 Using component
*/
const newUser = await AddUser.render()
setUserList((prevList) => [...prevList, newUser])
}
async function handleEdit (editIndex: number) {
/**
* 🔴 Using component and providing parameters (Edit mode)
*/
const modifiedUser = await AddUser.render({
user: userList[editIndex],
})
setUserList((prevList) => {
return prevList.map((item, index) => {
return index === editIndex ? modifiedUser : item
})
})
}
return (
<div>
<ul>{
userList.map((item, index) => (
<li key={item.id}>
<span>Name: {item.name}, Age: {item.age}</span>
<button onClick={() => handleEdit(index)}>Edit</button>
</li>
))
}</ul>
<button onClick={handleAdd}>Add</button>
</div>
)
}
```
Well, we have happily completed the development of the user list function based on the Promise component.
Based on the above example, we can see some characteristics:
+ There is no `ON/OFF` variable for modal
+ There is no event listener for modal `Cancel/Confirm`
+ There are no variables to distinguish between `Add/Edit` modes
+ When using the `Add/Edit` function, the program logic is independent and does not interfere with each other
+ The logic of the program is simple, clear and straightforward, and it is very readable and maintainable
Of course, you may think that this example is too simple, but in fact, the principle is the same, no matter how complex
the function, as long as it meets the asynchronous input and output scenarios, this mode can provide you with a more
user-friendly development experience and better program performance. We don't have to care about component rendering
state, we focus on business logic, that's it
The meaning of the Promise component. | shixianqin |
1,884,119 | Protection You Can Count On: Choosing the Right Firefighting Helmet | As fireman, it is essential towards select the appropriate firefighting safety head gear that suits... | 0 | 2024-06-11T08:13:00 | https://dev.to/daniel_rahnket_3442df0a4e/protection-you-can-count-on-choosing-the-right-firefighting-helmet-143k | design | As fireman, it is essential towards select the appropriate firefighting safety head gear that suits correctly as well as offers optimum security
You can't command the severe problems of terminate, however you can easily command exactly how ready you're towards deal with it, we'll be actually talking about the benefits, development, security, as well as high top premium of firefighting safety head gears
Finding out about the most recent innovation as well as ways to utilize your safety head gear will help you conserve lifestyles as well as maintain you risk-free
Benefits of Firefighting Safety head gears:
Firefighting safety head gears are actually developed towards offer optimum security as well as convenience towards the wearer
The helmet's external covering is actually made from a heat-resistant FIREFIGHTER HOOD product that can easily endure heats as well as fires
The internal cellular coating is actually made from a shock-absorbing product that safeguards the move coming from effect as well as infiltration
The Airflows within the safety head gear are actually another profit, it enables firemens towards remain awesome while operating in warm problems
Development in Firefighting Safety head gears:
The most recent innovation in firefighting safety head gears is actually targeted at offering much a lot better exposure in low-light problems, decreasing the helmet's value, as well as enhancing convenience
One instance of this particular is actually using a head-mounted screen (HMD) that allows the firefighter towards translucent smoke as well as darkness
Various other developments consist of using fire-resistant products, like Kevlar as well as Nomex, which offer much a lot better warm protection as well as security
Additionally, LED illuminations as well as reflective strips are actually integrated right in to the safety head gear towards enhance exposure
Security in Firefighting Safety head gears:
In firefighting, security is actually of miraculous significance
A correctly equipped safety head gear can easily reduce the danger of move trauma, concussion, as well as infiltration
Furthermore, the helmet's security is actually likewise essential, as it guarantees that the safety head gear remain on your move throughout extreme motions you might need to create whilst conserving somebody coming from a terminate
The chin band ought to fit as well as tight, maintaining the safety head gear in position without triggering pain
Contemporary safety head gears have actually undergone different examinations towards guarantee that they are actually risk-free
When buying, guarantee that the safety head gear satisfies the requirement demands of your division
Ways to Utilize a Firefighting Safety head gear:
Understanding ways to utilize a FIREFIGHTER HELMETsafety head gear is actually important for optimum security
First of all, Ensure that the helmet's shock absorber is actually correctly adapted to suit your move
The safety headgear ought to be actually degree on the move as well as the rear of the safety headgear ought to remainder around an in over the brows
Inspect towards view that the safety headgear suits firmly, however certainly not as well limited that it triggers pain
Likewise, ensure the chinstrap rests conveniently
Solution as well as High top premium of Firefighting Safety headgears:
The high top premium of your firefighting safety headgear is actually essential, as it might identify exactly how effectively it can easily safeguard you
It is essential towards purchase from reliable business that have actually a great performance history in creating top quality safety headgear
Likewise, bear in mind the grow older of your safety headgear as well as inspect the manufacturer's suggestion around when it requirements to become changed
Prior to purchasing, think about guarantees as well as repair work that might be actually needed
Emergency situation reaction devices service companies can easily likewise offer advisory solutions on the very best safety headgear kind for your requirements
Request of Firefighting Safety head gear
Firefighting safety head gears are actually important FIRE ESCAPE EQUIPMENT items of devices that safeguard firemens coming from dangerous atmospheres
They could be utilized in situations like architectural firefighting, wildland firefighting, saving, as well as various other emergency situation solutions | daniel_rahnket_3442df0a4e |
1,884,118 | Using React Hook Forms to make handling forms easier | Introduction React Hook Form is a powerful library for handling forms in React using... | 0 | 2024-06-11T08:11:56 | https://dev.to/mominmahmud/using-react-hook-forms-to-make-handling-forms-easier-4h7b | webdev, javascript, programming, react | ## Introduction
React Hook Form is a powerful library for handling forms in React using hooks. It simplifies form management by reducing boilerplate code and providing efficient validation. In this extended blog post, we’ll explore how to use React Hook Form’s useFieldArray to create dynamic forms with ease.
## Prerequisites
Before we begin, make sure you have the following installed:
```
Node.js
npm or yarn (for package management)
```
**Setting Up the Project**
Create a new React project using create-react-app or any other preferred method.
**Install React Hook Form:**
```
npm install react-hook-form
# or
yarn add react-hook-form
```
## Creating a Simple Form
Let’s start with a basic form that collects user information. We’ll create a form with fields for name and email. If any field is empty, we’ll display an error message.
```
import React from 'react';
import { useForm } from 'react-hook-form';
const SimpleForm = () => {
const { register, handleSubmit, errors } = useForm();
const onSubmit = (data) => {
console.log(data); // Handle form submission
};
return (
<form onSubmit={handleSubmit(onSubmit)}>
<input
type="text"
name="name"
placeholder="Name"
ref={register({ required: true })}
/>
{errors.name && <p>Name is required</p>}
<input
type="email"
name="email"
placeholder="Email"
ref={register({ required: true, pattern: /^\S+@\S+$/i })}
/>
{errors.email && <p>Valid email is required</p>}
<button type="submit">Submit</button>
</form>
);
};
export default SimpleForm;
```
## Adding Dynamic Fields with useFieldArray
Now, let’s enhance our form by allowing users to add multiple ticket details. We’ll use useFieldArray to manage an array of ticket fields dynamically.
```
import React from 'react';
import { useForm, useFieldArray } from 'react-hook-form';
const DynamicForm = () => {
const { register, handleSubmit, control } = useForm();
const { fields, append, remove } = useFieldArray({
control,
name: 'tickets',
});
const onSubmit = (data) => {
console.log(data); // Handle form submission
};
return (
<form onSubmit={handleSubmit(onSubmit)}>
{fields.map((field, index) => (
<div key={field.id}>
<input
type="text"
name={`tickets[${index}].name`}
placeholder="Ticket Name"
ref={register()}
/>
<input
type="email"
name={`tickets[${index}].email`}
placeholder="Ticket Email"
ref={register()}
/>
<button type="button" onClick={() => remove(index)}>
Remove
</button>
</div>
))}
<button type="button" onClick={() => append({ name: '', email: '' })}>
Add Ticket
</button>
<button type="submit">Submit</button>
</form>
);
};
export default DynamicForm;
```
## Conclusion
In this extended blog post, we covered how to create a simple form using React Hook Form and then extended it to handle dynamic fields with useFieldArray. Feel free to explore more features of React Hook Form to enhance your form-building experience!
Remember to check out the complete example on GitHub and experiment with it yourself. Happy coding! 🚀 | mominmahmud |
1,884,117 | Travel Surity | Premier Flight, Visa, and Tour Package Services in Delhi | Travel Surity is a leading company in the travel industry, specializing in tour package services,... | 0 | 2024-06-11T08:10:22 | https://dev.to/travelsurity/travel-surity-premier-flight-visa-and-tour-package-services-in-delhi-1fdi | [Travel Surity](https://maps.app.goo.gl/axSxn7GzPMgE2MYD8) is a leading company in the travel industry, specializing in tour package services, visa assistance, and flight bookings. Established in 2015, we have built a reputation for providing top-notch customer service and creating unforgettable travel experiences for our clients. Our team of experienced professionals is dedicated to ensuring that every aspect of your trip is taken care of seamlessly, allowing you to relax and enjoy your journey. Learn more about our services and how Travel Surity can enhance your travel experience.
Our Mission and Vision
At Travel Surity, our mission is to make travel planning seamless, enjoyable, and accessible to everyone. We believe that travel is not just about reaching a destination but about experiencing the journey in its intirety. Our vision is to become the most trusted travel partner globally, known for our innovative solutions, exceptional service, and dedication to making travel dreams come true. | travelsurity | |
1,884,116 | Top 10 Kubernetes Security Best Practices | In the rapidly evolving landscape of container orchestration, Kubernetes stands out as a powerful... | 0 | 2024-06-11T08:10:07 | https://www.clouddefense.ai/kubernetes-security-best-practices/ |
In the rapidly evolving landscape of container orchestration, Kubernetes stands out as a powerful platform for managing containerized applications. However, its complexity introduces unique security challenges that need careful consideration to protect your applications and data. Here’s a comprehensive guide to the top 10 Kubernetes security best practices, ensuring robust security for your Kubernetes clusters.
###What is Kubernetes Security?
Kubernetes security is about safeguarding your Kubernetes clusters and the applications they manage. Despite its popularity, Kubernetes has faced security issues due to varying levels of security awareness and expertise among users. Ensuring robust security involves addressing these risks through access controls, network policies, secure image management, and continuous monitoring. The goal is to maintain the integrity, confidentiality, and availability of your containerized applications.
###Why is Kubernetes Security Important?
Kubernetes security is critical across the entire container lifecycle—build, deploy, and runtime. Each phase requires different security measures to address the dynamic and distributed nature of Kubernetes clusters. For example, containers in the build phase are replaced with new images rather than patched, supporting robust version control. However, the transient nature of runtime environments necessitates continuous vigilance to ensure security remains strong and adaptive.
###Key Kubernetes Security Challenges
Kubernetes security faces several challenges. Complex configurations can lead to security issues like open ports or excessive permissions. Containers within Kubernetes clusters may hide vulnerabilities that can be exploited for privilege escalation or data breaches. The orchestrator itself can have vulnerabilities that, if exploited, can compromise the entire cluster. API security is another concern; improper access controls can lead to unauthorized access and potential cluster takeover. Ensuring the security of individual pods is particularly challenging due to their ephemeral nature, requiring robust network policies and runtime security measures.
###Top 10 Kubernetes Security Best Practices
**1. Resource Segregation:** Ensure workload isolation through effective resource allocation and strategic pod placement to limit the impact of potential security breaches.
**2. Role-Based Access Control (RBAC):** Utilize RBAC to define and manage access to the Kubernetes API, allowing only authorized users to interact with your cluster.
**3. API Security:** Secure the API server with robust authentication mechanisms, such as certificates, and restrict access to trusted IP addresses.
**4. Network Policies:** Implement detailed network policies to regulate pod communication, reducing the risk of unauthorized access and data breaches.
**5. Image Security:** Use a container image scanning tool to identify and fix vulnerabilities before deployment. Always use trusted sources for container images.
**6. Container Runtime Security:** Opt for secure container runtimes like Docker or Containerd and ensure the host operating system is regularly updated and patched.
**7. Monitoring and Logging:** Deploy comprehensive monitoring and logging tools like Prometheus, Grafana, and Elasticsearch to detect and respond to potential threats.
**8. Process Whitelisting:** Maintain a list of approved processes and perform runtime analysis to identify and block unauthorized processes, enhancing security.
**9. Enhancing Kubelet Security:** Strengthen Kubelet security with strong authentication, controlled API access, and regular audits to prevent unauthorized changes and vulnerabilities.
**10. Incident Response Plan:** Create and regularly update an incident response plan to quickly detect, isolate, and address security threats, minimizing their impact.
###Conclusion
Adopting these top 10 Kubernetes security best practices is crucial for protecting your containerized applications. Each practice addresses a critical aspect of security, forming a comprehensive strategy to ensure the integrity, confidentiality, and availability of your data and applications. For those looking for an all-in-one solution, CloudDefense.AI's Kubernetes Security Posture Management (KSPM) offers advanced protection, helping organizations secure their Kubernetes environments in the ever-evolving world of cloud-native computing. By integrating these best practices into your Kubernetes security strategy, you can enhance the security of your clusters and ensure a robust defense against potential threats. | clouddefenseai | |
1,884,115 | Best Child Neuro Care Doctor in Hyderabad | Dr. Habib’s Foster CDC | Our therapies are tailored specifically for your child’s special needs Dr. Habib’s Foster CDC’s Child... | 0 | 2024-06-11T08:06:25 | https://dev.to/drhabibcdc/best-child-neuro-care-doctor-in-hyderabad-dr-habibs-foster-cdc-27k4 | behaviouraltherapy, speechtherapy, parenttraining, cognitivebehaviouraltherapy | Our therapies are tailored specifically for your child’s special needs
Dr. Habib’s Foster CDC’s Child Development services help restore maximum functionality and self-sufficiency (skills and functions for daily living) in children who have lost their skills. Children with developmental disabilities and developmental delays need our services.
Child Development Centre Hyderabad – Dr. Habib’s Foster CDC provides a complete range of services for overall development child – visit today | drhabibcdc |
1,884,114 | Xuzhou Minghang Packaging Products Co., Ltd: Your Trusted Packaging Partner | Xuzhou Minghang Product packing Items Carbon monoxide Ltd Your Companion for Risk-free as well as... | 0 | 2024-06-11T08:05:58 | https://dev.to/daniel_rahnket_3442df0a4e/xuzhou-minghang-packaging-products-co-ltd-your-trusted-packaging-partner-94c | design |
Xuzhou Minghang Product packing Items Carbon monoxide Ltd Your Companion for Risk-free as well as Ingenious Product packing Services
Are actually you searching for a relied on companion for all of your product packing requirements Look no more compared to Xuzhou Minghang Product packing Items Carbon monoxide Ltd a business that focuses on production as well as providing top quality product packing items. We provide a wide variety of product packing compartments, consisting of glass containers, plastic containers, containers, as well as lids, towards satisfy the requirements of different markets like meals, drink, cosmetics, as well as pharmaceuticals. Right below are actually some benefits of dealing with our team as your product packing companion
1. Ingenious Product packing Services
At Xuzhou Minghang Product packing Items Carbon monoxide Ltd our team are actually dedicated towards providing ingenious as well as advanced Beverage Glass Bottle product packing services that satisfy the altering requirements of our clients. Our group of professionals leverages the most recent innovation as well as products towards style as well as produce product packing items that stand apart coming from the competitors. Consequently, our clients can easily take advantage of affordable product packing services that improve the security, shelf-life, as well as charm of their items
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| daniel_rahnket_3442df0a4e |
1,884,113 | Allegations of Sexual Misconduct Surface Against Dolkun Isa and Nury Turkel in Human Rights Community | In a shocking revelation, prominent human rights activists Dolkun Isa and Nury Turkel have been... | 0 | 2024-06-11T08:04:41 | https://dev.to/christopher_burns_5aba4cd/allegations-of-sexual-misconduct-surface-against-dolkun-isa-and-nury-turkel-in-human-rights-community-af | In a shocking revelation, prominent human rights activists Dolkun Isa and Nury Turkel have been accused of sexual harassment and misconduct, raising serious concerns within the human rights advocacy community. These allegations, if proven true, could tarnish the reputations of key figures in the fight for Uyghur rights and highlight a broader issue of sexual misconduct in the sector.#sexualassault #WUC #DorikunElsa #Metoo
Dolkun Isa: President of World Uyghur Congress Accused
Esma Gün, a Turkish-Belgian university student, has come forward with allegations against Dolkun Isa, the president of the World Uyghur Congress (WUC). In February 2021, Gün, then 22, received inappropriate messages from Isa, who was 53 at the time. Screenshots of their conversation, reviewed by NOTUS, reveal Isa making unwanted advances. Despite Gün's attempts to change the subject, Isa persisted, expressing a desire to kiss her and suggesting they meet privately.
Gün did not report the incidents to WUC, fearing it would undermine the organization's mission. "I didn’t want people to know their leader is someone like this," she explained. However, the emotional toll led her to eventually quit activism altogether.
Two other women, speaking anonymously, have also accused Isa of making unprofessional sexual advances. Before the publication of this report, Isa declined to comment on these allegations but issued a public apology on X (formerly Twitter), acknowledging "serious errors of judgement" and expressing deep regret for his actions.
Nury Turkel: Allegations at Oslo Freedom Forum
Nury Turkel, chair of the U.S. Commission on International Religious Freedom and a prominent Uyghur advocate, is also facing allegations. According to sources, concerns about Turkel's behavior were raised at the Oslo Freedom Forum. Julie Millsap, a contractor with the Uyghur Human Rights Project (UHRP), learned of these complaints in 2022. Millsap, who had a personal relationship with Turkel, confronted him about the allegations, which he dismissed as misunderstandings.
Despite Turkel’s denials, concerns persisted. Millsap reported these issues internally at UHRP, only to face pushback. In October 2023, UHRP initiated an investigation, which concluded there was no basis for the allegations. However, the investigation acknowledged that Turkel had acted inappropriately in a social setting in 2019.
Broader Implications: A Culture of Silence
The allegations against Isa and Turkel are part of a larger pattern of sexual misconduct within the human rights community. Interviews with 19 women involved in human rights activism revealed a culture where powerful men can act without consequence. Many women fear retaliation or believe that reporting misconduct would harm their careers and the causes they support.
Some organizations, like the Human Rights Foundation and the Hong Kong Democracy Council (HKDC), have begun addressing these issues by establishing internal committees and clear reporting mechanisms. However, many smaller or newly established groups lack the resources and procedures to handle such allegations effectively.
Call for Accountability
Whistleblowers like Millsap argue that human rights organizations must adopt thorough whistleblower policies and ensure multiple levels of accountability. This includes providing external avenues for reporting misconduct to avoid internal biases and potential retaliation.
Grant-making bodies, such as the National Endowment for Democracy, also play a crucial role. By tying funding to the implementation of robust misconduct policies, these organizations can drive meaningful change in the human rights sector.
The revelations about Isa and Turkel underscore the urgent need for a cultural shift in the human rights community. It is imperative that these organizations prioritize the safety and well-being of all activists, ensuring that those who fight for justice are not themselves victims of injustice. | christopher_burns_5aba4cd | |
1,884,112 | A Call for Reform: Addressing the Crisis within the World Uyghur Congress | As members of the World Uyghur Congress (WUC), we find ourselves at a critical juncture. The recent... | 0 | 2024-06-11T08:01:33 | https://dev.to/christopher_burns_5aba4cd/a-call-for-reform-addressing-the-crisis-within-the-world-uyghur-congress-58df | As members of the World Uyghur Congress (WUC), we find ourselves at a critical juncture. The recent allegations of sexual harassment against our chairman, Dolkun Isa, and other prominent leaders have cast a shadow over our organization and our mission. These accusations are deeply troubling and demand a comprehensive response. As we navigate this crisis, it is essential to address the issues head-on and reaffirm our commitment to justice, transparency, and the Uyghur cause.#sexualassault #WUC #DorikunElsa #Metoo
The Allegations and Immediate Response
On May 10, the Allbritton Journalism Institute published a report detailing allegations of sexual harassment against Dolkun Isa. Esma Gün, a Turkish-Belgian university student, along with two other women, accused Isa of using his position to engage in inappropriate behavior. Isa's initial response was to acknowledge a "serious lapse in judgment" while simultaneously downplaying the accusations, claiming he had "not taken any action" that would harm anyone.
The Impact on Our Organization
These revelations have had a profound impact on the WUC and the broader Uyghur human rights movement. Our organization, which has long been a beacon of hope for Uyghurs around the world, now faces scrutiny and doubt. The credibility and integrity of our leadership are under question, and this crisis threatens to undermine years of advocacy and hard work.
Internal Turmoil
Within the WUC, this scandal has led to significant internal strife. As we approach our eighth general assembly in October, where new leadership will be elected, the divisions within our ranks have become more pronounced. The Dolkun Isa faction, which has been dominant in recent years, now faces the possibility of losing influence. Meanwhile, other factions, such as those aligned with Rebiya Kadeer, see this as an opportunity to regain leadership positions.
External Criticism
Externally, various Uyghur organizations and activists have been vocal in their condemnation. The East Turkistan Government in Exile and other independent factions have criticized the WUC for its handling of the allegations and for failing to adequately address issues of misconduct within its ranks. These groups argue that the WUC has not only failed to promote the cause of East Turkistan independence effectively but has also been plagued by corruption and moral failings.
Our Commitment to Reform
In response to this crisis, the WUC is committed to a thorough and transparent process of reform. We recognize that restoring trust requires more than just words; it necessitates concrete actions and systemic changes.
Independent Investigation
We call for an independent investigation into the allegations against Dolkun Isa and any other claims of misconduct within our organization. This investigation must be impartial and thorough, ensuring that all voices are heard, and justice is served.
Strengthening Policies and Procedures
The WUC will implement stricter policies and procedures to prevent sexual harassment and misconduct. This includes establishing clear reporting mechanisms, providing mandatory training for all members, and ensuring that there are robust consequences for those who violate our standards.
Supporting Victims
We stand in solidarity with the victims and are committed to providing them with the support they need. This includes offering counseling services, legal assistance, and ensuring that their allegations are taken seriously and investigated promptly.
Organizational Transparency
Transparency is crucial to rebuilding trust. The WUC will undergo an internal audit to identify any existing vulnerabilities and implement reforms to strengthen our governance. We will regularly update our members and the public on our progress and the steps we are taking to address these issues.
Moving Forward Together
This is undoubtedly a challenging time for the World Uyghur Congress. However, it is also an opportunity for growth and renewal. By addressing these issues head-on and committing to meaningful reform, we can emerge stronger and more united in our mission to advocate for the rights and freedoms of the Uyghur people.
We call on all members, supporters, and allies to join us in this effort. Let us work together to ensure that the WUC remains a trusted and effective voice for the Uyghur cause. Together, we can overcome this crisis and continue our vital work with integrity and dedication.
World Uyghur Congress Propaganda Department
May 28, 2024 | christopher_burns_5aba4cd | |
1,708,317 | Weak memoization in Javascript | Let's dive deep into call stack, react fiber and weakmaps. All to improve our memoization. | 0 | 2024-06-11T07:56:40 | https://dev.to/thekashey/weak-memoization-in-javascript-4po6 | javascript, web, state | ---
title: Weak memoization in Javascript
published: true
description: Let's dive deep into call stack, react fiber and weakmaps. All to improve our memoization.
tags: javascript, web, state
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/i3nlhwcu2c3oqc7a02ja.png
# Use a ratio of 100:42 for best results.
# published_at: 2023-12-26 05:13 +0000
---
I decided to write this article to explain how a few things work as I felt a lack of understanding. Things somehow connected to state management and _memoization_.
We need to talk about something very foundational, as well as about abstractions we can build on top.
This time nothing will be left uncovered. This time you will master worry-free memoization in javascript 😎
----
Memoization is such a common thing in JS world nowadays, common and very important. With the recent [release of Reselect 5.0](https://github.com/reduxjs/reselect/releases/tag/v5.0.1) it also became a little easier than before. Easier not to break fragile selectors without the need to understand all nuances.
> Reselect 5 was released in Dec 2023, but the idea behind the _breakthrough solution_ was boiling for quite a while, [for a few years](https://github.com/reduxjs/reselect/discussions/491) at least.
The first "modern" implementation I was able to find - [weak-memoize](https://github.com/timkendrick/memoize-weak/tree/master) - was created around __8 years__ ago.
I have reason to believe that the _extended adoption_ time was influenced by my less-than-stellar communication skills and the challenge of conveying the principles behind "Weak Memoization," which I originally shared five years ago in [Memoization Forget-Me](https://dev.to/thekashey/memoization-forget-me-bomb-34kh).
Let's give it another shot.
Let’s walk the __full journey__ from something 💁♂️ simple to something quite 👨🔬 extreme.
This time I'll make you believe.
-----
## Level 1 - make it work
Let's write a few lines related to performing an operation “once”.
What would the __simplest memoization__ be?
```tsx
// some place to store results
let storedValue;
let storedArgument;
function memoizedCalculation(arg) {
// is the arg equal to the known one?
if(arg === storedArgument) {
return storedValue;
}
// if not - let's calculate new value
storedValue = functionToMemoize(arg);
storedArgument = arg;
return storedValue;
}
// usage
const value1 = memoizedCalculation(1);
const value2 = memoizedCalculation(2);
const valueN = memoizedCalculation(2); // will be memoized
```
Looks familiar - I reckon a lot of projects have code like this in a few places.
The only real problem - this code is not reusable and… 🤮 global variables that are so hard to control, especially in tests. I reckon the obvious next step is to make it a little more robust and introduce a `level 2` solution
## Level 2 - put it in a box
Handling global variables is a complex job, so would making them local improve the situation?
How we can make this code more "local" and more reusable?
The answer is "factories"
```diff
// reusable function you can "apply" to any other function
+function memoizeCalculation(functionToMemoize) {
let storedValue;
let storedArgument;
return function memoizedCalculation(arg) {
// is the arg equal to the known one?
if(arg === storedArgument) {
return storedValue;
}
// if not - let's calculate new value
storedValue = functionToMemoize();
storedArgument = arg;
return storedValue;
}
+}
// fist create a memoized function
+const memoizedCalculation = memoizeCalculation(functionToMemoize);
// usage
const value1 = memoizedCalculation(1);
const value2 = memoizedCalculation(2);
const valueN = memoizedCalculation(2); // will be memoized
```
Interesting parts - __nothing really changed__ from the usage point of view and nothing really changed from the function implementation - 99% of the code has been preserved, we just put another function around.
While this implementation is screaming "I am simple" - this is exactly how [memoize-one is written](https://github.com/alexreardon/memoize-one/blob/master/src/memoize-one.ts#L31), so it is “simple enough” to handle any production use case 🚀
This is a solution you actually can use. May be add `.clear` method to make ease testing, but that's all.
More importantly - "the original reselect" was also working this way, and that is "not the best way". Nobody was happy.
Something drastically changed in reselect __5__, so let’s move forward and try to __find that precious change__.
## Boss fight - there could be only one
The problem with `reselect` as well as `memoize-one` is that _“one”_ - a __single local variable__ used to store the results of the last invocation. In no circumstances it could be more than one, it just made this way.
> Why its "one"? Everything is connected to the "pattern" being used and one's ability to cleanup the results of previous memoization.
That is the difference between "caching"(with cache-key, storage limits and time-to-life) and memoization free of any "complications".
[Memoization Forget-Me](https://dev.to/thekashey/memoization-forget-me-bomb-34kh) explains these moments in detail.
🤔 How we can improve this? Maybe it's not "how" or "what". May be it's "where"?
🤨 Let me ask you - __where__ this local variable is stored?
The correct answer for JavaScript is:
> 💁♂️ "it’s stored in a function closure”, without defining what is a “closure”
A more helpful answer is
> 🧐 "the variable is stored in a function [stack](https://en.wikipedia.org/wiki/Call_stack)”. The very one that can [overflow](https://en.wikipedia.org/wiki/Stack_overflow).
In technical terms `stack` is an __execution context__ - it stores information about current function arguments, all its local variables and where the function should return execution once it is done. It's a section in a memory holding the real data.
In the simplest situation calling a function "extends" stack and exiting a function "shrinks" it. Here is why calling to many functions can cause the __stack overflow__ as it cannot grow endlessly.
However, in the Javascript world it is not so easy, because we have _closures_ which can "see" variables from dead functions or in other words ➡️ _the lifetime of a closure is unbound from the lifetime of its parent context_. As a result "call stack" in JS is more alike a "graph of boxes" with personal stacks of different functions pointing to each other.
> 💁♂️ So every function has a little box📦 with the data. Very neat.
Here is [an article with a little deep dive](https://mrale.ph/blog/2012/09/23/grokking-v8-closures-for-fun.html) to v8 execution context details.
Every time you call a function it is executed using a different stack, a different context, a different "box". Exactly like __React hooks__ being statically defined in a Function are magically getting values from React Fiber, which is an `execution context` for a __particular__ component.
> just ask yourself - where `useState` holds value. There should be a special place for it. There is always a special place for something, even in Hell...
👏👏 execution context gives an ability to run the __same__ function with __different__ variables 👏👏
You know - that sounds like [this](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/this), which works almost the same way in JavaScript - providing context. And keep in mind - the _keyword we no longer use_ is not only about _classes_ - `this` works for every operation around.
```tsx
myFunction.call(this, arg1);
```
What if we use js context (`this`) instead of CPU context (`stack`)
## Loading level 2 - somewhere else
First of all, I need to point at one [implementation detail of memoize-one](https://github.com/alexreardon/memoize-one/blob/master/src/memoize-one.ts#L31) which considers a potential side effect of a hidden function argument(`this`) potentially leading to different outcomes
Consider the following code
```tsx
class MyClass {
onClick(event) {
return this.process(event, this.state)
}
render() {
return <div onClick={this.onClick}/>
}
}
```
You might forgotten how it works, but in short - it does not 🤣 as we are losing `this` by reading a _shared_ value from it. To correct implementation one need to _inline_ callback
```tsx
class MyClass {
onClick = (event) => {
return this.process(event, this.state)
}
```
In this case, every `this.onClick` would be a very unique and very own `onClick`. For me, it sounds like a memoization.
Wondering how this operation of _assigning_ "class members" works 🤨? [Typescript playground](https://www.typescriptlang.org/play/?#code/MYGwhgzhAECyCeBhcVoG8BQ1oHsB2yAlsANbQC80AFAKYBuNeALgJQUB86W22ATjUwCuvPNCYALQhAB0AB145gNKLQbMANGMkyITMExotuAXwzGgA) to the rescue. But to save a click...
```tsx
class MyClass {
constructor() {
// just stores stuff in "this".
this.onClick = (event) => {
return this.process(event, this.state);
};
}
}
```
Looking back at the original `render` method reading `this.onClick` you might notice that a value of `this` matters.
----
So, let's imagine that `this` is always present. What about updating our memoization function a little bit?
What if we store our memoization results variable __inside context__, so we could have as many memoized results as we need?
Let’s do something very straightforward (and quite similar to the legacy React Context)
```diff
function memoizeCalculation(functionToMemoize) {
- let storedValue;
- let storedArgument;
return function memoizedCalculation(arg) {
// is the arg equal to the known one?
+ // let's store data not in the "function context"
+ // but the "execution context". 🤷♂️ why not?
+ if(arg === this.storedArgument) {
+ return this.storedValue;
}
// if not - let's calculate new value
+ this.storedValue = functionToMemoize();
+ this.storedArgument = arg;
+ return this.storedValue;
}
}
```
Now we have the ability to store __more than one__ result because we store it in __different contexts__.
```tsx
myFunction.call(object1, arg1); // will memoize
myFunction.call(object2, arg1); // will memoize SEPARATELY
myFunction.call(object1, arg1); // will reuse memoization
myFunction.call({storedValue:'return this', storedArgument:args1}, arg1); // will BYPASS 🙀 memoization
```
That would work, but would also create the same problem Legacy context had - naming conflicts. We used it at the last line above, it's cool, but please dont do that in the real code.
Can we do better? Well absolutely! One line will do the magic!
```diff
function memoizeCalculation(functionToMemoize) {
+ // a magic place for our data
+ const storeSymbol = Symbol();
return function memoizedCalculation(arg) {
// is the arg equal to the known one?
+ if(arg === this[storeSymbol]?.storedArgument) {
+ return this[storeSymbol]?.storedValue;
}
// if not - let's calculate new value
+ this[storeSymbol] = {
+ storedValue: functionToMemoize(),
+ storedArgument arg,
+ }
+ return this[storeSymbol]?.storedValue;
}
}
```
That looks great - we created a "magic key" to safely and securely store our data. Many solutions out there use a similar approach.
However, I am still not satisfied because __we penetrate object boundaries__ and store information where we should not.
Could we do better?
## Level 3 - The Better Place
> 🎉 this is the chapter where __weak memoization__ starts!
In the example above we were using `this` to store `information`. We were storing this information directly inside `this`, but the task was always about __tracking relations__, nothing else.
> `information` is related to `this`
- `this[key]=information`
- `this[information]="related`
Every time you encounter such a situation ask yourself - is there a better primitive to handle the job? In database terms, it could be a separate table storing relations, not another field on the `thisTable`
And indeed there is one primitive we could use here - `Map`, or to match our use case a `WeakMap`
> `WeakMap` will hold information about `A->B` and automatically remove the record when A ceases to exist.
Semantically `map.set(A,B)` is equal to `A[B]=true`, but without _hurting_ A
This is how our updates memoization will look like
```diff
function memoizeCalculation(functionToMemoize) {
+ // a magic store
+ const store = new WeakMap();
return function memoizedCalculation(arg) {
// is the arg equal to the known one?
+ const {storedArgument, storedValue} = store.get(this);
+ if(arg === storedArgument) {
+ return storedValue;
}
// if not - let's calculate new value
+ const storedValue = functionToMemoize();
+ // we do not "write into this", we "associate" data
+ store.set(this, {
+ storedValue: functionToMemoize(),
+ storedArgument arg,
+ });
+ return storedValue;
}
}
```
Now we store information related to `this` and `functionToMemoize` in _some other place_.
But the presence of `context` was an assumption, in reality is usually absent.
How we can change this approach to get at least some benefits from the given approach without relaying on `this` presence?
🤷♂️ Easy, just introduce another variable.
```diff
// "master default"
+ let GLOBAL_CONTEXT = {};
function memoizeCalculation(functionToMemoize) {
// a magic store
const store = new WeakMap();
return function memoizedCalculation(arg) {
+ const context = this || GLOBAL_CONTEXT;
// is the arg equal to the known one?
+ const {storedArgument, storedValue} = store.get(context);
```
And we can do another another step forward
What about automatic cleanup for all functions to ease testing (and help catching memory leaks).
```tsx
let GLOBAL_CONTEXT = {};
// instantly invalidates all caches
export const RESET_ALL_CACHES = () =>GLOBAL_CONTEXT={};
```
or
```tsx
+ export const GET_CONTEXT = () => userDefinedWay();
// ...
return function memoizedCalculation(arg) {
+ const context = GET_CONTEXT();
```
So now we actually got this _omnipresent_ `context` and more importantly - we can control the _version_ of store exposed to the memoization by controlling this `GLOBAL_CONTEXT`.
Here we can even start using [Asynchronous context tracking](https://nodejs.org/api/async_context.html) to have per-tread or per-test memoization separation out of the box.
And you know... I would only keep it and remove `this` we do not really use anymore 😎
🤑 BONUS: Just update `GLOBAL_CONTEXT` - all cache would be invalidated with all previous values garbage collected. Magic 🪄!
Cool, the code above is actually useful, but __we are still quite far__ from anything useful and anything as good as `reselect v5`. Let’s follow to the next level!
## Level 4 - cascading
Let’s make a little detour here. Reselect5 was not developed from the scratch, it was inspired by `React.cache` function, which is not deeply documented and not many developers really understand how it works.
So let’s check the code! Here is a [link](https://github.com/facebook/react/blob/f5af92d2c47d1e1f455faf912b1d3221d1038c37/packages/react/src/ReactCacheImpl.js#L57-L65). And here is the first section of the code
```tsx
export function cache(fn) {
return function () {
// try to read some "shared" variable, like `GET_CONTEXT` in the above
const dispatcher = ReactSharedInternals.A;
if (!dispatcher) {
// If there is no dispatcher, then we treat this as not being cached.
return fn.apply(null, arguments);
}
// and get some "fnMap", so alike to our "store"
const fnMap = dispatcher.getCacheForType(createCacheRoot);
```
And it actually looks very close to the code we just written
- some "omni present" variable - `ReactSharedInternals.A` gives us a pointer to the cache store
- and we will "read" and "write" to it
- there could be __more than one__ such context at the same point of time, which is quite valuable for SSR being executed in a parallel
- `React.cache` just stores result in different places for different renders.
But there is another important moment in React's implementation related to a "single result" being stored. `React.cache` uses __cascade__. And [Reselect v5](https://github.com/reduxjs/reselect/blob/master/src/weakMapMemoize.ts#L192) does exactly the same, and [memoize-weak](https://github.com/timkendrick/memoize-weak/blob/master/lib/memoize.js#L52) does the same and [kashe](https://github.com/theKashey/kashe/blob/master/src/weakStorage.ts#L34) does the same
```tsx
for (let i = 0, l = arguments.length; i < l; i++) {
const arg = arguments[i];
if (
typeof arg === 'function' ||
(typeof arg === 'object' && arg !== null)
) {
// Objects go into a WeakMap
cacheNode.o = objectCache = new WeakMap();
objectCache.set(arg, cacheNode);
} else {
// Primitives go into a regular Map
cacheNode.p = primitiveCache = new Map();
primitiveCache.set(arg, cacheNode);
}
}
```
> In some implementation `null` is rerouted to a `const NULL={}` object in order to allow WeakMap usage.
It creates a 🌳Tree-Like structure with nodes being WeakMap or Map, depending on the argument type.
Think about the RedBlack tree from above, with black nodes being `Map` and red nodes being `WeakMap`
One important downside of this approach could be found at [the original issue](https://github.com/facebook/react/pull/25506)
> _I use a WeakMap so that objects that can't be reached again get their cache entries garbage collected. Expandos aren't appropriate here because we also can GC the cache itself_.
> _There are unfortunate cases like `cachedFn('a', 'b', 'c', 'd', {})` will get its value GC:ed but not the path of maps to it. A smarter implementation could put the weakmaps on the outer side but it has to be more clever to ensure that argument index is preserved. I added some tests to preserve this in case we try this._
In the given example first arguments are not weak-mappable, so the `cascade` will be __not garbage collected__, but the values returned by a cached function - will.
- Unless there is no _weakmappable_ objects at all
- But everything will be cleaned up once the current rendering ends and the "main symbol" get's removed.
- so that's not an issue
----
🏆 The `Cascade` is what made Reselect 5 superior to all previous versions. Now it can store more than one value, because it's not a single local variable, its a tree 🏆
----
## Level up - an extra ability
As long as we are using React as an example - there is one more feature connecting the dots between something we talked about - [Taint API](https://react.dev/reference/react/experimental_taintObjectReference)
> taintObjectReference lets you prevent a specific object instance from being passed to a Client Component like a user object.
How does it work? Exactly like the "relations" from above ([link to sources](https://github.com/facebook/react/pull/27445/files#diff-ee5a976890ff41ff3143b55970e3b5543815a0d18dbc99c2ff053c5480479a06R17))
```tsx
export const TaintRegistryObjects = new WeakMap();
export function taintObjectReference(
message,
object,
) {
// here it goes
TaintRegistryObjects.set(object, message);
}
/// ...
const tainted = TaintRegistryObjects.get(value);
if (tainted !== undefined) {
throwTaintViolation(tainted);
}
```
WeakMaps establishing relations and is helping with so many things.
---
## So here it is
I hope you enjoyed this journey, and this _evolution_ of concepts helped you better understand how things are connected and how different primitives can help you.
Go use this new knowledge!
### Quick recap
- every program need to store variables _somewhere_. Usually you don't control this moment, but sometimes you do
- by controlling where values are stored you can create many different things - from weak memoization to react hooks
- there are libraries our there, like the latest generation of reselect, that gives you superpowers to worry less about memoization
- there are still some edge cases where you might need to have a special logic, for example with React separating memoization between different render threads
- [kashe](https://github.com/theKashey/kashe) provides a little more low level control over it, including supporting nodejs's [AsyncLocalStorage for thread separation](https://github.com/theKashey/kashe/blob/master/src/cache-models/async-node-cache.ts). Give it a try.
---
PS: And as I've mentioned React, hooks, and stack -
[The future of React.use and React.useMemo](https://interbolt.org/blog/react-use-selector-optimization) points at the interesting discussion that could be totally understood differently once `hooks` using `fiber` as a "single stack" model will start using something more like closures, ie independent context.
| thekashey |
1,884,105 | How to sign in with LinkedIn in a Strapi and Next.js app with custom authentication | Intro While working on a project for a client, one of the requirements was to allow users... | 0 | 2024-06-11T07:52:27 | https://dev.to/dellboyan/how-to-sign-in-with-linkedin-in-a-strapi-and-nextjs-app-with-custom-authentication-a53 | ## Intro
While working on a project for a client, one of the requirements was to allow users to sign up/sign in using their LinkedIn accounts besides registering with their email/password. In this post we will dive into this implementation using Strapi on the backend, Next.js on the frontend (Authentication handled by next-auth on the client side), issues I encountered and how I solved them, so it might help anyone working on similar features.
## LinkedIn Setup
There are many available providers supported out of the box inside Strapi: auth0, cas, cognito, discord, email, facebook, github, google, instagram, microsoft, patreon, reddit, twitch, twitter, vk, and finally linkedin.
When you open up Strapi admin and go to Settings — Providers you will see these options for LinkedIn. You will need Client ID and Client Secret, but you can completely ignore these settings and leave Linkedin Provider disabled inside the Strapi admin settings, we will not use them for this guide.
You can find LinkedIn Client ID and Client Secret by signing up on the [LinkedIn Developers website](https://developer.linkedin.com/). On the website you’ll have to create a new app and verify your ownership. That will allow you to get the Client ID and Client Secret and add authorized redirects. Additionally, you’ll have to enable the following product: Sign In with LinkedIn using OpenID Connect which will give you openid, profile and email scopes that will allow you to login.
## Strapi Setup and problem encountered
While working on implementing LinkedIn authentication I was following along with Strapi docs available on this url. If you look at the section “Setup the frontend” I got stuck at the final step:
> Create a frontend route like FRONTEND_URL/connect/${provider}/redirect that have to handle the access_token param and that have to request STRAPI_BACKEND_URL/api/auth/${provider}/callback with the access_token parameter.
> The JSON request response will be { "jwt": "...", "user": {...} }.
After I call the backend, I was constantly getting errors that pointed to a authorization problem. After hours of analyzing what could be the issue, I realized LinkedIn changed their scopes required for authentication so they don’t align with what Strapi uses. I opened an issue on Strapi forums and currently there is a Github issue connected with my question, but it’s still not merged and fixed.
```
body: {
serviceErrorCode: 100,
message: 'Not enough permissions to access: GET /me',
status: 403
},
```
According to this error and scopes required for the /me endpoint — [Profile API — LinkedIn | Microsoft Learn](https://learn.microsoft.com/en-us/linkedin/shared/integrations/people/profile-api) seems like Strapi is calling linkedin /v2/me endpoint which requires r_liteprofile, r_basicprofile, r_compliance scopes, while Linkedin is now using /v2/userinfo for authentication and these scopes: openid, profile, email, and that’s why I’m getting the error.
## Workaround Fix for LinkedIn provider
To make Strapi authentication work with LinkedIn I had to ignore the official authentication flow from Strapi and create a custom auth endpoint.
Like I pointed, I’m using Next.js on the frontend side and Next-Auth.js to handle authentication.
To handle authentication on the frontend inside authOptions, LinkedIn provider looks like this:
```
export const authOptions = {
providers: [
LinkedInProvider({
clientId: process.env.LINKEDIN_CLIENT_ID || '',
clientSecret: process.env.LINKEDIN_CLIENT_SECRET || '',
client: { token_endpoint_auth_method: 'client_secret_post' },
issuer: 'https://www.linkedin.com',
profile: (profile: LinkedInProfile) => ({
id: profile.sub,
name: profile.name,
email: profile.email,
image: profile.picture
}),
wellKnown: 'https://www.linkedin.com/oauth/.well-known/openid-configuration',
authorization: {
params: {
scope: 'openid profile email'
}
}
}),
]
}
```
Inside the callback jwt function, if the user is authenticating with LinkedIn I am calling a custom endpoint in Strapi that is handling the authentication and issuing jwt token.
```
callbacks: {
async jwt({ token, user, account }: { user: any; token: any; account: any }) {
if (account?.provider === 'linkedin') {
const res = await fetch(`${process.env.API_URL}/customLinkedinAuthEndpoint`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify(user)
});
const data = await res.json();
token.jwt = data.jwtToken;
} else {
if (user) {
token.jwt = user.jwt;
}
}
return token;
},
},
```
On the Strapi side create your custom endpoint. You will have to update the controller to handle authentication.
Inside your src/api/customLinkedinAuthEndpoint/controllers/ create a new file customLinkedinAuthEndpoint.js
Inside the file we define a function findOrCreateUser() that is handling all the logic. The function is checking if the user already exists and handling different use cases. If the user doesn’t exists it creates a new user. Based on this logic I am issuing the jwt token that the frontend can receive.
```
"use strict";
module.exports = {
linkedinAuth: async (ctx) => {
try {
const linkedinData = ctx.request.body;
const user = await findOrCreateUser(linkedinData);
// Issue a JWT token
const jwtToken = strapi.plugins["users-permissions"].services.jwt.issue({
id: user.id,
});
ctx.send({ jwtToken, user });
} catch (err) {
ctx.body = err;
}
},
};
async function findOrCreateUser(linkedinData) {
// Try to find the user by their LinkedIn ID
let user = await strapi.db.query("plugin::users-permissions.user").findOne({
where: { linkedinId: linkedinData.id },
});
if (!user) {
// If the user doesn't exist, try to find the user by their email
user = await strapi.db.query("plugin::users-permissions.user").findOne({
where: { email: linkedinData.email },
});
if (user && !user.linkedinId) {
// If the user exists but doesn't have a LinkedIn ID, update the user
user = await strapi.db.query("plugin::users-permissions.user").update({
where: { id: user.id },
data: {
confirmed: true,
linkedinId: linkedinData.id,
linkedinImage: linkedinData.image,
},
});
} else if (!user) {
// If the user doesn't exist, create new user
user = await strapi.db.query("plugin::users-permissions.user").create({
data: {
linkedinId: linkedinData.id,
username: linkedinData.name,
email: linkedinData.email,
linkedinImage: linkedinData.image,
role: 1,
confirmed: true,
provider: "local",
},
});
}
}
return user;
}
```
Finally inside the src/api/customLinkedinAuthEndpoint/routes/customLinkedinAuthEndpoint.js update the route
```
module.exports = {
routes: [
{
method: "POST",
path: "/customLinkedinAuthEndpoint",
handler: "customLinkedinAuthEndpoint.linkedinAuth",
config: {
policies: [],
middlewares: [],
},
},
],
};
```
You will also have to update permissions for this custom endpoint inside the Strapi admin to be able to call this endpoint on the client side.
And that’s it, you will be able to get the jwt on the client side with LinkedIn and make authenticated requests to the Strapi backend.
## Conclusion
Hope this guide can help anyone who encounters similar problems while working with Strapi and authentication. Hopefully issue with default auth flow for LinkedIn will be fixed soon but this guide can help anyone who wants to build custom authentication flow.
| dellboyan | |
1,884,111 | Selenium | What is selenium? Selenium is widely used open-source automation testing suite. It was developed... | 0 | 2024-06-11T07:52:11 | https://dev.to/priyanka624/selenium-54l2 | **What is selenium?**
Selenium is widely used open-source automation testing suite. It was developed by-
Jason Huggins in 2004 as an internal tool at thought works. Selenium supports automation across different browsers and platforms. Selenium supports wide range of languages -Java, python, C#, Ruby, JavaScript.
Components of Selenium
1)**Selenium IDE**
Selenium IDE -innovative tool kit for web testing, allowing users to record interactions with web applications.
Selenium IDE was created by “Shinya Kasatani” in 2006.
Features of IDE:
• Record
• Playbacks
• Browser check
• Check Elements
• spotting errors
• Exporting Tests
It is a friendly space for testers and developers.
2)**Selenium RC**
Selenium Remote control allows testers to write automated web application tests in various programming languages like Java, C#.
The Key feature of selenium RC was ability to interact with web browsers using a server which act as intermediary between the testing code and the browser.
3)**Selenium WebDriver**
Selenium web driver is a robust open-source framework for automating web browsers, is a better choice than RC.
Features of web driver are:
• Direct communication with browsers: -unlike RC WebDriver directly interact with web browser leading to most stable and reliable testing.
• Support of parallel execution-WebDriver allows parallel test execution enabling faster test cycles.
• Rich sets of API-WebDriver provide a comprehensive set of APIs for navigating through web pages, managing windows and handling alerts.
4)**Selenium Grid**
Selenium Grid is a server that allows tests to user web browsers instances running on remote machines with selenium grid one server act as hub. Tests contact the hub to obtain access to browser instances.
Features of selenium grid are:
• selenium grid allows running tests in parallel on multiple machines.
• Run tests in browser running on different platforms or operating systems.
**Why do we use selenium for automation? **
Selenium is widely used for automation in web applications testing for several reasons:
1)cross -browser compatibility:
Selenium supports multiple browsers such as chrome, Firefox, safari, edge, and internet explorer, enabling comprehensive testing across different environments.
2: Multi language support:
Selenium support various programming languages, including java, C#, python, ruby, JS making it accessible to a wide range of developers and testers
3)Flexibility and Extensibility
Selenium’s design allows for extensive customization and integration with other tools, frameworks, and libraries, enhancing its capabilities for complex testing scenarios.
4)community and ecosystem:
Selenium has a large and active community, providing a wealth of resources, tutorials and third -party plugins. This community supports helps in resolving issues and sharing best practices.
5)open source:
Being open source, selenium is free to use and has no licensing cost, making it an attractive option for both small projects and large projects.
6.Integration with CI/CD pipeline:
Selenium can be easily integrated into continuous integration/continuous deployment (ci\cd) pipelines, allowing automated tests to be run as part of the software development Lifecyle. Ensuring faster feedback and higher quality releases.
7.real browser interaction
Selenium interacts with browser in a way that closely simulates user behavior, providing more accurate test results comparted to other automation tools that do not operate with a real browser.
8.Sacalabilty with selenium grid
Selenium grid allows tests to be distributed across multiple machines and browsers, enabling
Parallel execution and reducing the time required for test suite to complete.
9.support for modern web technologies
Selenium keeps up with web technology advancements, providing support for html5, css3 and java script -bases dynamic web pages.
10.Robust documentation and tools:
Selenium offers comprehensive documentation. A well-defined API and various tools like selenium ide for recording and playback of tests enhancing productivity and ease of use.
This featured make selenium a powerful and popular choice for web application automation.
| priyanka624 | |
1,884,110 | Introducing FMZ Quant data science research environment | The term “hedging” in quantitative trading and programmatic trading is a very basic concept. In... | 0 | 2024-06-11T07:51:35 | https://dev.to/fmzquant/introducing-fmz-quant-data-science-research-environment-fij | fmzquant, cryptocurrency, trading, data | The term “hedging” in quantitative trading and programmatic trading is a very basic concept. In cryptocurrency quantitative trading, the typical hedging strategies are: Spots-Futures hedging, intertemporal hedging and individual spot hedging.
Most of hedging tradings are based on the price difference of two trading varieties. The concept, principle and details of hedging trading may not very clear to traders who have just entered the field of quantitative trading. That's ok, Let's use the “Data science research environment” tool provided by the FMZ Quant platform to master these knowledge.
On FMZ Quant website Dashboard page, click on "Research" to jump to the page of this tool:
Here I uploaded this analysis file directly:
This analysis file is an analysis of the process of the opening and closing positions in a Spots-Futures hedging trading. The futures side exchange is OKX and the contract is quarterly contract; The spots side exchange is OKX spots trading. The transaction pair is BTC_USDT, The following specific analysis environment file, contains two version of it, both Python and JavaScript.
## Research Environment Python Language File
Analysis of the principle of futures-cash hedging.ipynbDownload
In [1]:
```
from fmz import *
task = VCtx('''backtest
start: 2019-09-19 00:00:00
end: 2019-09-28 12:00:00
period: 15m
exchanges: [{"eid":"Futures_OKCoin","currency":"BTC_USD", "stocks":1}, {"eid":"OKX","currency":"BTC_USDT","balance":10000,"stocks":0}]
''')
# Create a backtest environment
import matplotlib.pyplot as plt
import numpy as np
# Imported drawing library matplotlib and numpy library
```
In [2]:
```
exchanges[0].SetContractType("quarter") # The first exchange object OKX futures (eid: Futures_OKCoin) calls the function that sets the current contract, set to the quarterly contract
initQuarterAcc = exchanges[0].GetAccount() # Account information at the OKEX Futures Exchange, recorded in the variable initQuarterAcc
initQuarterAcc
```
Out[2]:
{'Balance': 0.0, 'FrozenBalance': 0.0, 'Stocks': 1.0, 'FrozenStocks': 0.0}
In [3]:
```
initSpotAcc = exchanges[1].GetAccount() # Account information at the OKX spot exchange, recorded in the variable initSpotAcc
initSpotAcc
```
Out[3]:
{'Balance': 10000.0, 'FrozenBalance': 0.0, 'Stocks': 0.0, 'FrozenStocks': 0.0}
In [4]:
```
quarterTicker1 = exchanges[0].GetTicker() # Get the futures exchange market quotes, recorded in the variable quarterTicker1
quarterTicker1
```
Out[4]:
{'Time': 1568851210000,
'High': 10441.25002,
'Low': 10441.25,
'Sell': 10441.25002,
'Buy': 10441.25,
'Last': 10441.25001,
'Volume': 1772.0,
'OpenInterest': 0.0}
In [5]:
```
spotTicker1 = exchanges[1].GetTicker() # Get the spot exchange market quotes, recorded in the variable spotTicker1
spotTicker1
```
Out[5]:
{'Time': 1568851210000,
'High': 10156.60000002,
'Low': 10156.6,
'Sell': 10156.60000002,
'Buy': 10156.6,
'Last': 10156.60000001,
'Volume': 7.4443,
'OpenInterest': 0.0}
In [6]:
```
quarterTicker1.Buy - spotTicker1.Sell # The price difference between Short selling futures and Buying long spots
```
Out[6]:284.64999997999985
In [7]:
```
exchanges[0].SetDirection("sell") # Set up the futures exchange, the trading direction is short
quarterId1 = exchanges[0].Sell(quarterTicker1.Buy, 10) # The futures are short-selled, the order quantity is 10 contracts, and the returned order ID is recorded in the variable quarterId1.
exchanges[0].GetOrder(quarterId1) # Query the order details of the futures order ID is quarterId1
```
Out[7]:
{'Id': 1,
'Price': 10441.25,
'Amount': 10.0,
'DealAmount': 10.0,
'AvgPrice': 10441.25,
'Type': 1,
'Offset': 0,
'Status': 1,
'ContractType': b'quarter'}
In [8]:
```
spotAmount = 10 * 100 / quarterTicker1.Buy # Calculate the number of cryptocurrency equivalent to 10 contracts, as the spots amount of the order placed
spotId1 = exchanges[1].Buy(spotTicker1.Sell, spotAmount) # Spot exchange placing order
exchanges[1].GetOrder(spotId1) # Query the order details of the spot order ID as spotId1
```
Out[8]:
{'Id': 1,
'Price': 10156.60000002,
'Amount': 0.0957,
'DealAmount': 0.0957,
'AvgPrice': 10156.60000002,
'Type': 0,
'Offset': 0,
'Status': 1,
'ContractType': b'BTC_USDT_OKEX'}
It can be seen that the orders of the order quarterId1 and the spotId1 are all completely filled, that is, the opening position of the hedge is completed.
In [9]:
```
Sleep(1000 * 60 * 60 * 24 * 7) # Hold the position for a while, wait for the difference to become smaller and close the position.
```
After the waiting time has elapsed, prepare to close the position. Get the current quotes quarterTicker2, spotTicker2 and print. The trading direction of the futures exchange object is set to close short positions: exchanges[0].SetDirection("closesell") to close the position. Print the details of the closing positions, showing that the closing position is completely done.
In [10]:
```
quarterTicker2 = exchanges[0].GetTicker() # Get the current market quotes of the futures exchange, recorded in the variable quarterTicker2
quarterTicker2
```
Out[10]:
{'Time': 1569456010000,
'High': 8497.20002,
'Low': 8497.2,
'Sell': 8497.20002,
'Buy': 8497.2,
'Last': 8497.20001,
'Volume': 4311.0,
'OpenInterest': 0.0}
In [11]:
```
spotTicker2 = exchanges[1].GetTicker() # Get the current spot exchange market quotes, recorded in the variable spotTicker2
spotTicker2
```
Out[11]:
{'Time': 1569456114600,
'High': 8444.70000001,
'Low': 8444.69999999,
'Sell': 8444.70000001,
'Buy': 8444.69999999,
'Last': 8444.7,
'Volume': 78.6273,
'OpenInterest': 0.0}
In [12]:
```
quarterTicker2.Sell - spotTicker2.Buy # The price difference of closing position between Short position of futures and the Long position of spot
```
Out[12]:
52.5000200100003
In [13]:
```
exchanges[0].SetDirection("closesell") # Set the current trading direction of the futures exchange to close short position
quarterId2 = exchanges[0].Buy(quarterTicker2.Sell, 10) # The futures exchange closing positions, and records the order ID, recorded to the variable quarterId2
exchanges[0].GetOrder(quarterId2) # Query futures closing position orders detail
```
Out[13]:
{'Id': 2,
'Price': 8497.20002,
'Amount': 10.0,
'DealAmount': 10.0,
'AvgPrice': 8493.95335,
'Type': 0,
'Offset': 1,
'Status': 1,
'ContractType': b'quarter'}
In [14]:
```
spotId2 = exchanges[1].Sell(spotTicker2.Buy, spotAmount) # The spot exchange place order to closing positions, and records the order ID, recorded to the variable spotId2
exchanges[1].GetOrder(spotId2) # Query spots closing order details
```
Out[14]:
{'Id': 2,
'Price': 8444.69999999,
'Amount': 0.0957,
'DealAmount': 0.0957,
'AvgPrice': 8444.69999999,
'Type': 1,
'Offset': 0,
'Status': 1,
'ContractType': b'BTC_USDT_OKEX'}
In [15]:
```
nowQuarterAcc = exchanges[0].GetAccount() # Get current futures exchange account information, recorded in the variable nowQuarterAcc
nowQuarterAcc
```
Out[15]:
{'Balance': 0.0,
'FrozenBalance': 0.0,
'Stocks': 1.021786026184,
'FrozenStocks': 0.0}
In [16]:
```
nowSpotAcc = exchanges[1].GetAccount() # Get current spot exchange account information, recorded in the variable nowSpotAcc
nowSpotAcc
```
Out[16]:
{'Balance': 9834.74705446,
'FrozenBalance': 0.0,
'Stocks': 0.0,
'FrozenStocks': 0.0}
Calculate the profit and loss of this hedging operation by comparing the initial account with the current account.
In [17]:
```
diffStocks = abs(nowQuarterAcc.Stocks - initQuarterAcc.Stocks)
diffBalance = nowSpotAcc.Balance - initSpotAcc.Balance
if nowQuarterAcc.Stocks - initQuarterAcc.Stocks > 0 :
print("profit：", diffStocks * spotTicker2.Buy + diffBalance)
else :
print("profit：", diffBalance - diffStocks * spotTicker2.Buy)
```
Out[17]:
Revenue: 18.72350977580652
Below we look at why the hedge is profitable. We can see the chart drawn, the futures price is the blue line, the spot price is the orange line, both prices are falling, and the futures price is falling faster than the spot price.
In [18]:
```
xQuarter = [1, 2]
yQuarter = [quarterTicker1.Buy, quarterTicker2.Sell]
xSpot = [1, 2]
ySpot = [spotTicker1.Sell, spotTicker2.Buy]
plt.plot(xQuarter, yQuarter, linewidth=5)
plt.plot(xSpot, ySpot, linewidth=5)
plt.show()
```
Out[18]:
Let us look at the changes in the price difference. The difference is 284 when the hedge is opened (that is, shorting the futures, longing the spot), reaching 52 when the position is closed (the futures short positions are closed, and the spot long positions are closed). The difference is from big to small.
In [19]:
```
xDiff = [1, 2]
yDiff = [quarterTicker1.Buy - spotTicker1.Sell, quarterTicker2.Sell - spotTicker2.Buy]
plt.plot(xDiff, yDiff, linewidth=5)
plt.show()
```
Out[19]:
**Let me give an example, a1 is the futures price of time 1, and b1 is the spot price of time 1. A2 is the futures price at time 2, and b2 is the spot price at time 2.**
As long as a1-b1, that is, the futures-spot price difference of time 1 is greater than the futures-spot price difference of a2-b2 of time 2, a1 - a2 > b1 - b2 can be introduced. There are three cases: (the futures-spot holding position are the same size)
- a1 - a2 is greater than 0, b1 - b2 is greater than 0, a1 - a2 is the difference in futures profit, b1 - b2 is the difference in spot loss (because the spot is long position, the price of opening position is higher than the price of closing position, therefore, the position loses money), but the futures profit is greater than the spot loss. So the overall trading operation is profitable. This case corresponds to the chart in step In[8].
- a1 - a2 is greater than 0, b1 - b2 is less than 0, a1 - a2 is the difference of futures profit, b1 - b2 is the difference of spot profit (b1 - b2 is less than 0, indicating that b2 is greater than b1, that is, the price of opening the position is low, the price of selling the position is high, so the position make profit)
- a1 - a2 is less than 0, b1 - b2 is less than 0, a1 - a2 is the difference of futures losses, b1 - b2 is the difference of spot profit due to a1 - a2 > b1 - b2, the absolute value of a1 - a2 is less than b1 - b2 Absolute value, the profit of the spot is greater than the loss of the futures. So the overall trading operation is profitable.
There is no case where a1 - a2 is less than 0 and b1 - b2 is greater than 0, because a1 - a2 > b1 - b2 have been defined. Similarly, if a1 - a2 is equal to 0, since a1 - a2 > b1 - b2 is defined, b1 - b2 must be less than 0. Therefore, as long as the futures are short position and the spot are long position in a long-term hedging method, which meets the conditions a1 - b1 > a2 - b2, the opening and closing position operation is the profit hedging.
For example, the following model is one of the cases:
In [20]:
```
a1 = 10
b1 = 5
a2 = 11
b2 = 9
if a1 - b1 > a2 - b2:
print(a1 - a2 > b1 - b2)
xA = [1, 2]
yA = [a1, a2]
xB = [1, 2]
yB = [b1, b2]
plt.plot(xA, yA, linewidth=5)
plt.plot(xB, yB, linewidth=5)
plt.show()
```
Out[20]:
## Research Environment JavaScript Language File
Research environment not only supports Python, but also supports JavaScript
Below I also give an example of a JavaScript research environment:
In [1]:
```
// Import the required package, click "Save Backtest Settings" on the FMZ Quant "Strategy Editing Page" to get the string configuration and convert it to an object.
var fmz = require("fmz") // Automatically import talib, TA, plot library after import
var task = fmz.VCtx({
start: '2019-09-19 00:00:00',
end: '2019-09-28 12:00:00',
period: '15m',
exchanges: [{"eid":"Futures_OKCoin","currency":"BTC_USD","stocks":1},{"eid":"OKEX","currency":"BTC_USDT","balance":10000,"stocks":0}]
})
```
In [2]:
```
exchanges[0].SetContractType("quarter") // The first exchange object OKEX futures (eid: Futures_OKCoin) calls the function that sets the current contract, set to the quarterly contract
var initQuarterAcc = exchanges[0].GetAccount() // Account information at the OKX Futures Exchange, recorded in the variable initQuarterAcc
initQuarterAcc
```
Out[2]:
{ Balance: 0, FrozenBalance: 0, Stocks: 1, FrozenStocks: 0 }
In [3]:
```
var initSpotAcc = exchanges[1].GetAccount() // Account information at the OKX spot exchange, recorded in the variable initSpotAcc
initSpotAcc
```
Out[3]:
{ Balance: 10000, FrozenBalance: 0, Stocks: 0, FrozenStocks: 0 }
In [4]:
```
var quarterTicker1 = exchanges[0].GetTicker() // Get the futures exchange market quotes, recorded in the variable quarterTicker1
quarterTicker1
```
Out[4]:
{ Time: 1568851210000,
High: 10441.25002,
Low: 10441.25,
Sell: 10441.25002,
Buy: 10441.25,
Last: 10441.25001,
Volume: 1772,
OpenInterest: 0 }
In [5]:
```
var spotTicker1 = exchanges[1].GetTicker() // Get the spot exchange market quotes, recorded in the variable spotTicker1
spotTicker1
```
Out[5]:
{ Time: 1568851210000,
High: 10156.60000002,
Low: 10156.6,
Sell: 10156.60000002,
Buy: 10156.6,
Last: 10156.60000001,
Volume: 7.4443,
OpenInterest: 0 }
In [6]:
```
quarterTicker1.Buy - spotTicker1.Sell // the price difference between Short selling futures and long buying spot
```
Out[6]:
284.64999997999985
In [7]:
```
exchanges[0].SetDirection("sell") // Set up the futures exchange, the trading direction is shorting
var quarterId1 = exchanges[0].Sell(quarterTicker1.Buy, 10) // The futures are short-selled, the order quantity is 10 contracts, and the returned order ID is recorded in the variable quarterId1.
exchanges[0].GetOrder(quarterId1) // Query the order details of the futures order ID is quarterId1
```
Out[7]:
{ Id: 1,
Price: 10441.25,
Amount: 10,
DealAmount: 10,
AvgPrice: 10441.25,
Type: 1,
Offset: 0,
Status: 1,
ContractType: 'quarter' }
In [8]:
```
var spotAmount = 10 * 100 / quarterTicker1.Buy // Calculate the number of cryptocurrency equivalent to 10 contracts, as the amount of the order placed
var spotId1 = exchanges[1].Buy(spotTicker1.Sell, spotAmount) // Spot exchange placing order
exchanges[1].GetOrder(spotId1) // Query the order details of the spot order ID as spotId1
```
Out[8]:
{ Id: 1,
Price: 10156.60000002,
Amount: 0.0957,
DealAmount: 0.0957,
AvgPrice: 10156.60000002,
Type: 0,
Offset: 0,
Status: 1,
ContractType: 'BTC_USDT_OKEX' }
It can be seen that the orders of the order quarterId1 and the spotId1 are all completely filled, that is, the opening of the hedge is completed.
In [9]:
```
Sleep(1000 * 60 * 60 * 24 * 7) // Hold the position for a while, wait for the difference to become smaller and close the position.
```
After the waiting time has passed, prepare to close the position. Get the current market price quarterTicker2and spotTicker2print it.
The trading direction of the futures exchange object is set to close short position: exchanges[0].SetDirection("closesell")place an order to close the position.
Print the details of the closing order, showing that the closing order is fully filled and the closing is completed.
In [10]:
```
var quarterTicker2 = exchanges[0].GetTicker() // Get the current market quote of the futures exchange, recorded in the variable quarterTicker2
quarterTicker2
```
Out[10]:
{ Time: 1569456010000,
High: 8497.20002,
Low: 8497.2,
Sell: 8497.20002,
Buy: 8497.2,
Last: 8497.20001,
Volume: 4311,
OpenInterest: 0 }
In [11]:
```
var spotTicker2 = exchanges[1].GetTicker() // Get the current spot exchange market quotes, recorded in the variable spotTicker2
spotTicker2
```
Out[11]:
{ Time: 1569456114600,
High: 8444.70000001,
Low: 8444.69999999,
Sell: 8444.70000001,
Buy: 8444.69999999,
Last: 8444.7,
Volume: 78.6273,
OpenInterest: 0 }
In [12]:
```
quarterTicker2.Sell - spotTicker2.Buy // the price difference between the short position of futures and the long position of spot
```
Out[12]:
52.5000200100003
In [13]:
```
exchanges[0].SetDirection("closesell") // Set the current trading direction of the futures exchange to close short position
var quarterId2 = exchanges[0].Buy(quarterTicker2.Sell, 10) // The futures exchange place orders to close position, and records the order ID, recorded to the variable quarterId2
exchanges[0].GetOrder(quarterId2) // Query futures closing position order details
```
Out[13]:
{ Id: 2,
Price: 8497.20002,
Amount: 10,
DealAmount: 10,
AvgPrice: 8493.95335,
Type: 0,
Offset: 1,
Status: 1,
ContractType: 'quarter' }
In [14]:
```
var spotId2 = exchanges[1].Sell(spotTicker2.Buy, spotAmount) // The spot exchange place orders to close position, and records the order ID, recorded to the variable spotId2
exchanges[1].GetOrder(spotId2) // Query spot closing position order details
```
Out[14]:
{ Id: 2,
Price: 8444.69999999,
Amount: 0.0957,
DealAmount: 0.0957,
AvgPrice: 8444.69999999,
Type: 1,
Offset: 0,
Status: 1,
ContractType: 'BTC_USDT_OKX' }
In [15]:
```
var nowQuarterAcc = exchanges[0].GetAccount() // Get current futures exchange account information, recorded in the variable nowQuarterAcc
nowQuarterAcc
```
Out[15]:
{ Balance: 0,
FrozenBalance: 0,
Stocks: 1.021786026184,
FrozenStocks: 0 }
In [16]:
```
var nowSpotAcc = exchanges[1].GetAccount() // Get current spot exchange account information, recorded in the variable nowSpotAcc
nowSpotAcc
```
Out[16]:
{ Balance: 9834.74705446,
FrozenBalance: 0,
Stocks: 0,
FrozenStocks: 0 }
Calculate the profit and loss of this hedging operation by comparing the initial account with the current account.
In [17]:
```
var diffStocks = Math.abs(nowQuarterAcc.Stocks - initQuarterAcc.Stocks)
var diffBalance = nowSpotAcc.Balance - initSpotAcc.Balance
if (nowQuarterAcc.Stocks - initQuarterAcc.Stocks > 0) {
console.log("profit：", diffStocks * spotTicker2.Buy + diffBalance)
} else {
console.log("profit：", diffBalance - diffStocks * spotTicker2.Buy)
}
```
Out[17]:
Revenue: 18.72350977580652
Below we look at why the hedge is profitable. We can see the chart drawn, the futures price is the blue line, the spot price is the orange line, both prices are falling, and the futures price is falling faster than the spot price.
In [18]:
```
var objQuarter = {
"index" : [1, 2], // The index 1 for the first moment, the opening position time, and 2 for the closing position time.
"arrPrice" : [quarterTicker1.Buy, quarterTicker2.Sell],
}
var objSpot = {
"index" : [1, 2],
"arrPrice" : [spotTicker1.Sell, spotTicker2.Buy],
}
plot([{name: 'quarter', x: objQuarter.index, y: objQuarter.arrPrice}, {name: 'spot', x: objSpot.index, y: objSpot.arrPrice}])
```
Out[18]:
Let us look at the changes in the price difference. The difference is 284 when the hedge is opened (that is, shorting the futures, longing the spot), reaching 52 when the position is closed (the futures short positions are closed, and the spot long positions are closed). The difference is from big to small.
In [19]:
```
var arrDiffPrice = [quarterTicker1.Buy - spotTicker1.Sell, quarterTicker2.Sell - spotTicker2.Buy]
plot(arrDiffPrice)
```
Out[19]:
**Let me give an example, a1 is the futures price of time 1, and b1 is the spot price of time 1. A2 is the futures price at time 2, and b2 is the spot price at time 2.**
As long as a1-b1, that is, the futures-spot price difference of time 1 is greater than the futures-spot price difference of a2-b2 of time 2, a1 - a2 > b1 - b2 can be introduced. There are three cases: (the futures-spot holding position are the same size)
- a1 - a2 is greater than 0, b1 - b2 is greater than 0, a1 - a2 is the difference in futures profit, b1 - b2 is the difference in spot loss (because the spot is long position, the price of opening position is higher than the price of closing position, therefore, the position loses money), but the futures profit is greater than the spot loss. So the overall trading operation is profitable. This case corresponds to the chart in step In[8].
- a1 - a2 is greater than 0, b1 - b2 is less than 0, a1 - a2 is the difference of futures profit, b1 - b2 is the difference of spot profit (b1 - b2 is less than 0, indicating that b2 is greater than b1, that is, the price of opening the position is low, the price of selling the position is high, so the position make profit)
- a1 - a2 is less than 0, b1 - b2 is less than 0, a1 - a2 is the difference of futures losses, b1 - b2 is the difference of spot profit due to a1 - a2 > b1 - b2, the absolute value of a1 - a2 is less than b1 - b2 Absolute value, the profit of the spot is greater than the loss of the futures. So the overall trading operation is profitable.
There is no case where a1 - a2 is less than 0 and b1 - b2 is greater than 0, because a1 - a2 > b1 - b2 have been defined. Similarly, if a1 - a2 is equal to 0, since a1 - a2 > b1 - b2 is defined, b1 - b2 must be less than 0. Therefore, as long as the futures are short position and the spot are long position in a long-term hedging method, which meets the conditions a1 - b1 > a2 - b2, the opening and closing position operation is the profit hedging.
For example, the following model is one of the cases:
In [20]:
```
var a1 = 10
var b1 = 5
var a2 = 11
var b2 = 9
// a1 - b1 > a2 - b2 get ： a1 - a2 > b1 - b2
var objA = {
"index" : [1, 2],
"arrPrice" : [a1, a2],
}
var objB = {
"index" : [1, 2],
"arrPrice" : [b1, b2],
}
plot([{name : "a", x : objA.index, y : objA.arrPrice}, {name : "b", x : objB.index, y : objB.arrPrice}])
```
Out[20]:
From: https://blog.mathquant.com/2023/03/17/introducing-fmz-quant-data-science-research-environment.html | fmzquant |
1,884,108 | BTC RECOVERY EXPERT | I want to publicly thank Fast Web Recovery, A professional private investigator and a certified... | 0 | 2024-06-11T07:47:33 | https://dev.to/george_bush_344257e22cfd2/btc-recovery-expert-3ojb | I want to publicly thank Fast Web Recovery, A professional private investigator and a certified expert in Bitcoin Recovery Services, for their assistance in helping me recover the money I lost to fraud. An online manipulation artist who represented themselves as knowledgeable and experienced in the field of Crypto investments conned my wife and myself. My $9,356,000 worth of funds that were put into cryptocurrency. I was left helpless after the fraud tricked us and had to spend hours looking for a Crypto recovery service to get my money back. The specialist I found was Fast Web Recovery. I just had to be patient after describing my situation to the expert, and all of my money was returned to my wallet in less than 72 hours. Thank you Fast Web Recovery for your excellent assistance in getting my money back. Fast Web Recovery can be reached through various channels like: fastwebrecovery (at) cybergal (dot) com or WhatsApp: +447448936750 | george_bush_344257e22cfd2 | |
1,539,006 | How to solve reCaptcha v3 Enterprise | Understanding reCAPTCHA v3 Enterprise, what is? ReCAPTCHA is a free service provided by... | 0 | 2023-07-16T16:41:04 | https://dev.to/qwwrtt/how-to-solve-recaptcha-v3-enterprise-58g | recaptchav3enterprise, captcha, solver, tutorial | 
# Understanding reCAPTCHA v3 Enterprise, what is?
ReCAPTCHA is a free service provided by Google that protects your website from spam and abuse. It uses an advanced risk analysis engine and adaptive CAPTCHAs to keep automated software from engaging in abusive activities on your site. It does this while letting your valid users pass through with ease.
However, in its latest iteration, reCAPTCHA v3 Enterprise, some complexities and issues have emerged. Instead of showing a CAPTCHA challenge, reCAPTCHA v3 returns a score so you can choose the most appropriate action for your website. It's a subtle system that operates behind the scenes and allows users to browse websites without interruption.
The reCAPTCHA v3 Enterprise system works by assigning a score to each user interaction, ranging from 0.0 (likely a bot) to 1.0 (likely human). The scoring system is based on interactions across a site, not just on a single page. It uses this score to evaluate whether the interaction is likely to be from a human or a bot.
While the benefits of reCAPTCHA v3 Enterprise include robust protection from automated attacks, there are several concerns and challenges it presents for businesses and users alike.
reCaptcha v3 looks like:
# User Experience and Best Practices
One major issue with reCAPTCHA v3 Enterprise lies in its user experience. While the idea of a non-intrusive, frictionless user experience sounds good in theory, in practice, it's not always as straightforward.
Since reCAPTCHA v3 Enterprise operates in the background, users are often unaware they are being evaluated. This lack of transparency can be off-putting for some users who value clarity about data collection practices. Privacy-conscious users might be uncomfortable with the idea of their interactions being scored without their knowledge or consent.
Furthermore, users who are incorrectly flagged as bots can have a frustrating experience as they may face increased scrutiny or even be blocked from accessing certain parts of a website without understanding why. And while false positives can occur with any CAPTCHA system, the opaque nature of reCAPTCHA v3 Enterprise means users can be left in the dark about why they're experiencing difficulties.
Best practices for a smooth user experience involve clear communication about the use of reCAPTCHA v3 Enterprise on a website. Informing users about how their interactions are being evaluated and the purpose behind it can help alleviate some of the concerns.
# Advanced settings: Understanding scoring
In advanced applications of reCAPTCHA v3 Enterprise, understanding score interpretation is crucial. However, it's not always clear-cut. The exact factors that go into the score aren't transparent, which can make it challenging for website owners to adjust or improve their scoring over time.
Customizing the reCAPTCHA experience is another aspect that could potentially improve user experience, but it comes with its own set of challenges. For example, it's possible to adjust the sensitivity of reCAPTCHA scoring, but finding the right balance to minimize false positives while still effectively blocking bots can be a process of trial and error.
In conclusion, while reCAPTCHA v3 Enterprise offers a sophisticated tool for distinguishing between human users and bots, its lack of transparency and potential for negatively impacting user experience are significant concerns. Balancing security needs with user experience is a challenge for any online platform, and it's clear that reCAPTCHA v3 Enterprise, while a powerful tool, is not without its issues.
# How to identify reCaptcha Enterprise
In the digital world, recognizing the precise security measures employed by a website can be a nuanced task. For those looking to determine if a site is using reCAPTCHA v3 Enterprise, a straightforward method is available. This method involves examining the scripts that the website loads during operation.
One of the identifying features of reCAPTCHA v3 Enterprise is its distinctive script, specifically named 'enterprise.js'. When a website employs reCAPTCHA v3 Enterprise, it must load this script to function correctly. Hence, the presence of this script is a clear indication of the use of reCAPTCHA v3 Enterprise.
The 'enterprise.js' script can be found in the website's source code, generally embedded within a 'script' HTML tag. The source attribute (src) within the 'script' tag points to the location of this JavaScript file. In the case of reCAPTCHA v3 Enterprise, it will point to one of the following URLs:
``https://recaptcha.net/recaptcha/enterprise.js``
``https://google.com/recaptcha/enterprise.js``
The HTML script tags would appear as follows:
```json
<script src="https://recaptcha.net/recaptcha/enterprise.js" async defer></script>
```
or
```json
<script src="https://google.com/recaptcha/enterprise.js" async defer></script>
```
The 'async' and 'defer' attributes are used to control how the script is loaded with respect to the rest of the webpage, ensuring it doesn't negatively impact the website's loading speed and performance.
In summary, the presence of the 'enterprise.js' script within the website's source code, sourced from either of the above URLs, is a reliable indicator that the website is utilizing reCAPTCHA Enterprise for its security measures.
# Step 1: Sign Up for capsolver.com
To start using [capsolver](https://capsolver.com), you need to sign up for an account. Visit the website and click on the ‘Sign Up’ button. You will be prompted to enter your email address and create a password. Once you have provided the necessary information, click on the ‘Sign Up’ button to create your account.
# Step 2: Add Funds to Your Account
Before you can start solving reCaptcha v3, you need to add funds to your capsolver.com account. Click on the ‘Add Funds’ button and select your preferred payment method. Follow the on-screen instructions to complete the payment process.
# How to solve reCaptcha v3 Enterprise
Before we start solving reCaptcha v3 Enterprise, there are some requeriments and points that we need to be aware that they are needed to know
**Requeriments:**
- **Capsolver Key**: This is an essential component in the process. Capsolver Key is a unique identifier that authenticates your requests to the CAPTCHA solving service.
- **Proxy**: While not strictly necessary, the use of a proxy is highly recommended when dealing with reCAPTCHA v3 Enterprise. A proxy server serves as an intermediary for requests from clients seeking resources from other servers, providing an additional layer of security and anonymity. For optimal results, you may consider using a reliable service such as MetaProxies.
While the proxy is optional, remember that reCAPTCHA v3 Enterprise places a high level of importance on the IP address. Therefore, using your own proxy is usually beneficial.
**Points to be aware that if we don't follow, solution will be invalid:**
In order to ensure the effectiveness of the solution, the following points must be meticulously adhered to. Failing to do so may result in an invalid solution:
- **Correct** `pageAction`: The 'pageAction' field must be accurately populated. This value is integral to how reCAPTCHA functions and incorrect entries will lead to a flawed solution.
- **Correct** `websiteUrl`: The website URL must be accurate. Any errors in the website URL will result in reCAPTCHA not being able to function correctly, leading to a lower score.
- **Quality** of `proxy`: The quality of the proxy you use can significantly impact the effectiveness of your solution. Poor quality proxies can lead to low scores.
**Remember, if you opt for proxyless methods (using proxies from capsolver), you might end up with a lower score. Hence, it's recommended that you use your own proxy. Adhering to these points is essential in achieving a reCAPTCHA score between 0.7-0.9.**
For more details on solving reCaptcha v3 Enterprise, please refer to our [documentation](https://docs.capsolver.com/guide/captcha/ReCaptchaV3.html)
For this example, we will only use the required parameters. The task types for reCaptcha v3 Enterprise are:
- `ReCaptchaV3EnterpriseTask`: This task type requires your own proxies.
- `ReCaptchaV3EnterpriseTaskProxyLess` is using the server's built-in proxy.
We will use **ReCaptchaV3EnterprisTask**. The example will be a test page to verify the score of our tokens, this use reCaptcha v3 but not the enterprise version, but we can use as example for testing. The page will be [link](https://antcpt.com/score_detector), we will need proxies (residentials, datacenter, mobile proxies work), capsolver key with balance, correct websiteUrl and correct pageAction.
By default, the pageAction is verify, but the site can customize, so remember that you must check if it’s verify or a custom one, you can also read this to find how [page](https://www.capsolver.com/blog/how-to-identify-and-find-values-of-recaptchav3).
For solve reCaptcha v3 for the test site, we will just need to send to capsolver this information:
# Step 1: Submitting the information to capsolver
```json
POST https://api.capsolver.com/createTask
{
"clientKey":"yourapiKey",
"task":
{
"type":"ReCaptchaV3EnterpriseTask",
"websiteURL":"https://antcpt.com/score_detector",
"websiteKey":"6LcR_okUAAAAAPYrPe-HK_0RULO1aZM15ENyM-Mf",
"pageAction": "homepage",
"proxy":"yourproxy"
}
}
```
# Step 4: Getting the results
We will need to retrieve the `getTaskResult` method until the captcha is solved.
Example:
```json
POST https://api.capsolver.com/getTaskResult
Host: api.capsolver.com
Content-Type: application/json
{
"clientKey":"YOUR_API_KEY",
"taskId": "TASKID OF CREATETASK" //ID created by the createTask method
}
```
After the captcha has been solved, you can check the captcha token by sending the token to the site, example:
```js
var request = require('request');
var options = {
'method': 'POST',
'url': 'https://antcpt.com/score_detector/verify.php',
'headers': {
'Content-Type': 'application/json'
},
body: JSON.stringify({
"g-recaptcha-response": "here the token of capsolver"
})
};
request(options, function (error, response) {
if (error) throw new Error(error);
console.log(response.body);
});
```
Consequently, the test page will provide feedback regarding the token's score.
In summary, while navigating through the complexities of solving reCAPTCHA v3 Enterprise might seem intimidating, utilizing resources such as capsolver.com can streamline the process significantly. By adhering to the procedures specified above, you're well-equipped to effectively solve reCAPTCHA v3 and achieve a score indicative of human interaction.
Capsolver Team 💜
| qwwrtt |
1,884,107 | Unlocking the Potential of VPS Hosting in Pakistan | In the dynamic landscape of web hosting, Virtual Private Servers (VPS) have emerged as a... | 0 | 2024-06-11T07:46:15 | https://dev.to/web_hoster_fd8d313caa846a/unlocking-the-potential-of-vps-hosting-in-pakistan-42ej | In the dynamic landscape of web hosting, Virtual Private Servers (VPS) have emerged as a game-changer, especially in Pakistan's burgeoning digital ecosystem. VPS hosting offers a unique blend of affordability, flexibility, and performance, making it the preferred choice for businesses and individuals alike.
**Understanding VPS Hosting**
VPS hosting operates on the principle of virtualization, where a physical server is divided into multiple virtual compartments. Each compartment acts as an independent server, complete with its own operating system, resources, and dedicated allocation of CPU, RAM, and storage. This isolation ensures enhanced security, stability, and control compared to traditional shared hosting environments.
**
Benefits of VPS Hosting
1. Enhanced Performance and Stability**
In Pakistan's competitive online market, website speed and reliability are paramount. [VPS hosting in pakistan](https://webhoster.pk/cloud-vps-hosting-pakistan/
) provides dedicated resources, eliminating the performance bottlenecks associated with shared hosting. With guaranteed uptime and faster loading times, businesses can deliver seamless user experiences, fostering customer satisfaction and retention.
**2. Scalability and Flexibility**
As businesses in Pakistan grow and evolve, their hosting needs change accordingly. VPS hosting offers scalability on-demand, allowing users to easily upgrade or downgrade their resources based on fluctuating traffic and requirements. This flexibility empowers businesses to adapt to market demands swiftly, without incurring significant downtime or disruption.
**3. Improved Security Measures**
Cybersecurity is a major concern for businesses in Pakistan, given the rising prevalence of cyber threats. VPS hosting enhances security by isolating each virtual server, preventing instances of data breaches or unauthorized access. Additionally, users have the flexibility to implement custom security measures, such as firewalls and encryption protocols, to fortify their online presence further.
**4. Cost-Effectiveness
**
Contrary to popular belief, VPS hosting is remarkably cost-effective, offering an optimal balance between affordability and performance. In Pakistan's economic landscape, where budget constraints often dictate business decisions, VPS hosting emerges as a viable solution for startups, SMEs, and established enterprises seeking robust hosting infrastructure without breaking the bank.
**Choosing the Right VPS Hosting Provider in Pakistan**
Selecting the right VPS hosting provider is crucial to maximizing the benefits of this technology. Factors such as reliability, customer support, infrastructure, and pricing plans should be carefully evaluated before making a decision. In Pakistan, WebHoster.pk stands out as a leading provider of VPS hosting solutions, offering state-of-the-art infrastructure, 24/7 technical support, and competitive pricing plans tailored to meet the diverse needs of businesses and individuals.
**Conclusion**
In conclusion, VPS hosting represents a paradigm shift in the realm of web hosting, offering unparalleled performance, flexibility, and security for businesses and individuals in Pakistan. By embracing VPS hosting, businesses can unlock new opportunities for growth, innovation, and success in the digital age.
To experience the power of VPS hosting in Pakistan, visit [WebHoster.pk](https://webhoster.pk/) today! | web_hoster_fd8d313caa846a | |
1,884,106 | Beyond the Basics: Top Indian PHP Development Companies for Enterprise-Level Applications (2024) | The world of enterprise applications demands power, scalability, and security. For Indian businesses... | 0 | 2024-06-11T07:46:13 | https://dev.to/akaksha/beyond-the-basics-top-indian-php-development-companies-for-enterprise-level-applications-2024-554d | The world of enterprise applications demands power, scalability, and security. For Indian businesses seeking to leverage PHP for complex enterprise-level projects, navigating the vast landscape of development companies can be daunting. This article unveils some of the leading Indian PHP development companies renowned for their expertise in building robust enterprise applications in 2024.
Why PHP for Enterprise Applications?
While often associated with web development, PHP offers several advantages for building enterprise applications:
Maturity and Stability: With a proven track record and extensive libraries, PHP offers a stable foundation for complex applications.
Scalability and Performance: PHP code can be optimized to handle high transaction volumes and large user bases, ensuring your application can grow with your business.
Cost-Effectiveness: Compared to some other languages, [PHP development](https://www.clariontech.com/blog/top-10-php-development-companies-in-india) is generally considered cost-effective, making it an attractive option for large-scale projects.
Integration Capabilities: PHP seamlessly integrates with various databases and third-party tools, allowing for a flexible and customizable development approach.
Choosing the Right Partner for Your Enterprise Needs:
Selecting the ideal PHP development company for your enterprise application requires careful analysis. Consider these factors:
Project Scope: Define the application's functionalities, user base, and expected data volume.
Company Portfolio: Research the company's experience with similar enterprise applications in your industry.
Team Expertise: Evaluate the team's proficiency in PHP frameworks, security practices, and enterprise-grade architecture design.
Scalability and Performance: Ensure the company has experience building applications that can scale with your growth.
Communication and Project Management: Open communication and a proven project management methodology are crucial for successful enterprise application development.
Building the Future with PHP:
Enterprise applications are the backbone of modern businesses. These top Indian PHP development companies are well-positioned to guide Indian businesses through the complexities of building enterprise applications. By partnering with an experienced team, you can leverage the power of PHP to create robust, scalable, and secure solutions that empower your organization to achieve its full potential. | akaksha | |
1,884,104 | Building a tree Gantt | What is a tree Gantt? The tree Gantt is a component where every row is considered either a... | 0 | 2024-06-11T07:42:58 | https://dev.to/lenormor/building-a-tree-gantt-43kf | javascript, webdev, node, typescript | ## What is a tree Gantt?
The tree Gantt is a component where every row is considered either a tree or a leaf. Tree rows have branches linking to other rows that can be trees or leaves. The leaf row is always the most granular and has no further link.
As a developer, working with tree Gantts can be a tedious task, as most of the algorithms use recursion to visit all the vertices.
## Implementing a tree Gantt
To implement a Gantt component in [ScheduleJS](https://schedulejs.com/), the first requirement is to extend the right GanttComponentBase. To build a tree Gantt architecture, your Angular component must extend the DefaultScheduleTreeGanttComoponentBase instead of the regular DefaultScheduleGanttComponentBase.
```
// Create a new tree gantt component
export class MyTreeGanttComponent extends DefaultScheduleTreeGanttComponentBase<MyRow, DefaultScheduleGanttGraphicTreeComponent<MyRow>> { }
```
Storing activities in ScheduleJS always involves an ActivityRepository. There are two different types of repositories:
- The IntervalTreeActivityRepository
- The ListActivityRepository
In the case of a tree Gantt, the default ActivityRepository is an IntervalTreeActivityRepository. It allows your application to perform binary search and ensures higher performance when processing a large number of activities.
Using a tree Gantt component is very similar to using a regular Gantt component, the only difference is that you have to manually call the
```
gantt.refreshTreeRows()
```
method once you are done with modifying your rows. This is done to avoid redundancy in calling this function as it may lead to lower performance.
## The ScheduleJS Viewer activity schedule use case
Now we will have a closer look at the HTML file of the ScheduleJS Viewer main component which implements a tree Gantt: the ScheduleJsViewerActivitySchedule. Let’s explain the typical template implemented for the tree Gantt use case.
```
<!-- Activity schedule component -->
<div class="schedule-js-viewer-activity-schedule-container"
[class.loading]="gantt.isLoading">
<!-- Schedule timeline & Tree table header cells -->
<schedule-js-viewer-activity-schedule-timeline-block [gantt]="gantt"
[scheduleInfoColumns]="scheduleInfoColumns"
[cellsHost]="this">
</schedule-js-viewer-activity-schedule-timeline-block>
<!-- Gantt Graphics -->
<default-schedule-gantt-graphic-tree class="schedule-js-viewer-activity-schedule-graphics"
[gantt]="gantt"
[ganttNgDoCheckBoundingState]="isTabUsingActivitySchedule()"
[ganttContainerElement]="nativeElement"
[viewportAdditionalLoadCount]="getAdditionalLoadCount()"
[rowInfoTemplate]="rowInfoTemplate"
(rowExpandedChange)="gantt.refreshTreeRows()">
<!-- Info columns -->
<ng-template #rowInfoTemplate
let-treeNodeContext>
<schedule-js-viewer-activity-schedule-info-column [cellsHost]="this"
[scheduleInfoColumns]="scheduleInfoColumns"
[gantt]="gantt"
[treeNodeContext]="asTreeNodeContext(treeNodeContext)"
[row]="treeNodeContext.value"
[parenthoodColors]="parenthoodColors">
</schedule-js-viewer-activity-schedule-info-column>
</ng-template>
</default-schedule-gantt-graphic-tree>
<!-- Sub schedules -->
<div *ngFor="let projectFileData of scheduleJsViewerStateService.projectFiles; let index = index">
<schedule-js-viewer-activity-sub-schedule *ngIf="projectFileData"
[file]="projectFileData"
[index]="index"
(timelineSyncChange)="onTimelineSubscription($event, index)">
</schedule-js-viewer-activity-sub-schedule>
</div>
</div>
```
_There's a lot more to say, but if you'd like to see the rest of the article, I suggest you go to_ [ScheduleJS](https://schedulejs.com/en/building-a-tree-gantt/)
| lenormor |
1,884,103 | How to build a blockchain with Rust | Introduction to Blockchain and Rust Blockchain technology, a decentralized digital ledger,... | 27,673 | 2024-06-11T07:41:36 | https://dev.to/rapidinnovation/how-to-build-a-blockchain-with-rust-6i0 | ## Introduction to Blockchain and Rust
Blockchain technology, a decentralized digital ledger, has revolutionized the
way data is stored and transactions are recorded across multiple industries.
Its ability to provide transparency, security, and efficiency in data handling
processes has made it a pivotal technology in today's digital age. Rust, on
the other hand, is a programming language known for its safety and
performance. It is increasingly becoming a popular choice for developing
blockchain applications due to its unique features that align well with the
needs of blockchain technology.
## What is Blockchain?
Blockchain is essentially a distributed database that maintains a continuously
growing list of records, called blocks, which are linked and secured using
cryptography. Each block contains a cryptographic hash of the previous block,
a timestamp, and transaction data, making it extremely secure and resistant to
modification of the data. This structure inherently makes an accurate and
verifiable record of every single transaction made, which is why it is widely
used in cryptocurrencies like Bitcoin. The decentralized nature of blockchain
means it does not rely on a central point of control. Instead, it is managed
by a peer-to-peer network collectively adhering to a protocol for validating
new blocks. This decentralization makes it resistant to the control and
interference of a single entity, enhancing its reliability and security.
## Why Rust for Blockchain Development?
Rust is favored in blockchain development for several reasons. Firstly, its
emphasis on safety and concurrency makes it ideal for handling the complex,
multi-threaded environments typical in blockchain systems. Rust’s ownership
model, which ensures memory safety without garbage collection, contributes to
the robustness and efficiency of blockchain applications. This is crucial in
environments where performance and security are paramount. Moreover, Rust's
powerful type system and pattern matching enhance the ability to write clear
and concise code, which is less prone to bugs. This is particularly beneficial
in blockchain development, where a small error can lead to significant
security vulnerabilities or financial losses. Additionally, Rust's growing
ecosystem and supportive community provide a wealth of libraries and tools
that are specifically tailored for blockchain development, making it easier
for developers to implement complex blockchain functionalities.
## Benefits of Using Rust
Rust is a modern programming language that offers numerous benefits for
developers, particularly in areas requiring high performance and safety. One
of the primary advantages of Rust is its emphasis on memory safety without
sacrificing performance. Rust achieves this through its ownership model, which
ensures that there are no dangling pointers or data races in concurrent code.
This makes Rust an excellent choice for systems programming, where safety and
efficiency are paramount. Another significant benefit of Rust is its powerful
type system and pattern matching, which facilitate writing clear and concise
code that is also robust and predictable. The compiler is incredibly
stringent, catching many errors at compile time that would only be discovered
at runtime in other languages. This not only improves code quality but also
significantly reduces debugging and maintenance time. Rust also boasts a
growing ecosystem and community. The Cargo package manager and Crates.io
ecosystem provide easy access to a wealth of libraries and tools, enhancing
productivity and broadening the scope of projects that can be tackled using
Rust. Moreover, major companies like Microsoft and Google have started
incorporating Rust into their infrastructure, which is a testament to its
reliability and efficiency.
## Setting Up the Development Environment
Setting up a development environment for Rust is straightforward, thanks to
the tools and detailed documentation provided by the Rust community. The first
step in setting up the environment is to install the Rust compiler and
associated tools, which can be done using a tool called rustup. This tool
manages Rust versions and associated tools, making it easy to install and
update your Rust development environment. Once rustup is installed, it
automatically installs the latest stable version of Rust. This setup not only
includes the Rust compiler, rustc, but also Cargo, Rust’s build system and
package manager. Cargo simplifies many tasks in the Rust development process,
such as building executables, running tests, and managing dependencies.
## Installing Rust
Installing Rust is a simple process, facilitated by rustup, which is the
official installer for the stable, beta, and nightly distributions of Rust. To
install Rust, you need to download and run the rustup script from the official
Rust website. This script will install rustup, the Rust compiler (rustc), and
Cargo, Rust’s package manager. During the installation, rustup will prompt you
to configure your installation preferences, allowing you to choose between
different versions of Rust or customize your installation path. Once
installed, rustup provides commands to manage different versions of Rust,
enabling you to easily switch between stable, beta, or nightly releases
depending on your project needs. It's also important to configure your
system’s PATH to ensure that the Rust tools are easily accessible from the
command line. This is typically handled automatically by the rustup script.
## Essential Rust Tools and Libraries
Rust, known for its safety and performance, has a rich ecosystem of tools and
libraries that enhance its usability and efficiency in various applications,
including system programming, web development, and even game development. One
of the most essential tools in the Rust ecosystem is Cargo, the Rust package
manager, which automates many tasks such as building code, downloading
libraries, and managing dependencies. Another vital tool is Rustfmt, which
automatically formats Rust code to ensure that it adheres to the style
guidelines, promoting readability and maintainability. This tool is
particularly useful in collaborative projects where consistency in code style
is crucial. Clippy, on the other hand, is a collection of lints to help
developers write cleaner and more efficient Rust code. It catches common
mistakes and suggests improvements. In terms of libraries, Serde is one of the
most critical for Rust developers. It is a framework for serializing and
deserializing Rust data structures efficiently and generically. Another
significant library is Tokio, an asynchronous runtime for the Rust programming
language. It is designed to make it easy to write network applications,
services, and databases. These tools and libraries not only simplify the
development process but also enhance the performance and reliability of the
applications developed using Rust. #rapidinnovation #BlockchainTechnology
#RustLang #Decentralization #CryptoSecurity #BlockchainDevelopment
https://www.rapidinnovation.io/post/how-to-build-a-blockchain-with-rust
| rapidinnovation | |
1,884,102 | Pikashow APK : an overview | *Unveiling Pikashow APK: Your Gateway to Limitless Entertainment * Introduction: Discover the next... | 0 | 2024-06-11T07:40:06 | https://dev.to/willium_james_8f82ee4aef6/pikashow-apk-an-overview-16hg | pikashow, movies, dramas |
[**Unveiling Pikashow APK: Your Gateway to Limitless Entertainment
**
](https://thepikashowapp.com)
Introduction:
Discover the next level of entertainment with Pikashow APK. Dive into a world where your favorite movies and TV shows are just a tap away, all within a seamless streaming experience.
Endless Variety:
Explore a vast library of content covering every genre imaginable. From action-packed blockbusters to heartwarming dramas, Pikashow APK has something to satisfy every taste and mood.
Ad-Free Experience:
Bid farewell to interruptions and distractions. Pikashow APK offers an ad-free viewing experience, allowing you to immerse yourself fully in your favorite content without any interruptions.
Intuitive Interface:
Navigate effortlessly through Pikashow's user-friendly interface. Discover new releases, trending shows, and hidden gems with ease, enhancing your viewing experience.
High-Definition Streaming:
Experience your favorite movies and TV shows in stunning clarity and audio quality. Pikashow APK ensures seamless playback and high-definition streaming, delivering an immersive entertainment experience.
On-the-Go Access:
Whether you're at home or on the move, Pikashow APK ensures that entertainment is always within reach. Stream your favorite content anytime, anywhere, and never miss a moment of excitement.
Conclusion:
Download Pikashow APK today and unlock a world of endless entertainment possibilities. Rediscover the joy of streaming with Pikashow APK, your ultimate entertainment companion.
| willium_james_8f82ee4aef6 |
1,884,094 | HTML file path and HTML head elements | HTML File Paths A file path describes the location of a file in a web site's folder... | 0 | 2024-06-11T07:25:43 | https://dev.to/wasifali/html-file-path-and-html-head-elements-2nno | webdev, css, learning, html | ## **HTML File Paths**
A file path describes the location of a file in a web site's folder structure.
File paths are used when linking to external files, like:
Web pages
Images
Style sheets
JavaScript
## **Absolute File Paths**
An absolute file path is the full URL to a file
## **Example**
```
<img src="https://www.w3schools.com/images/picture.jpg" alt="Mountain">
```
## **Relative File Paths**
A relative file path points to a file relative to the current page.
## **Example:**
```
<img src="/images/picture.jpg" alt="Mountain">
```
This example shows that the file path points to a file in the images folder located in the current folder.
## **The HTML <head> Element**
The `<head>` element is a container for metadata (data about data) and is placed between the `<html>` tag and the `<body>` tag.
The HTML `<head>` element is a container for the following elements: `<title>`, `<style>`, `<meta>`, `<link>`, `<script>`, and `<base>.`
## **The HTML <title> Element**
The `<title>` element defines the title of the document. The title must be text-only
The `<title>` element is required in HTML documents
The `<title>` element:
defines a title in the browser
provides a title for the page
displays a title for the page in search engine-results
## **Example**
```
<!DOCTYPE html>
<html>
<head>
<title>A Meaningful Page Title</title>
</head>
<body>
The content of the document
</body>
</html>
```
## **The HTML `<style>` Element**
The `<style>` element is used to define style information for a single HTML page
## **Example**
```
<style>
body {background-color: powderblue;}
h1 {color: red;}
p {color: blue;}
</style>
```
## **The HTML `<link>` Element**
The `<link>` element defines the relationship between the current document and an external resource.
The `<link>` tag is most often used to link to external style sheets.
## **Example**
```
`<link rel="stylesheet" href="mystyle.css">`
```
## **The HTML `<meta>` Element**
The `<meta>` element is typically used to specify the character set, page description, keywords, author of the document, and viewport settings.
## **Examples**
```
Define the character set used:
<meta charset="UTF-8">
```
## **Example of `<meta>` tags:**
```
<meta charset="UTF-8">
<meta name="description" content="Free Web tutorials">
<meta name="keywords" content="HTML, CSS, JavaScript">
<meta name="author" content="John Doe">
```
## **The HTML `<script>` Element**
The `<script>` element is used to define client-side JavaScript.
## **Example**
```
<script>
function myFunction() {
document.getElementById("demo").innerHTML = "Hello JavaScript!";
}
</script>
```
## **The HTML `<base>` Element**
The `<base>` element specifies the base URL
## **Example:**
```
<head>
<base href="https://www.w3schools.com/" target="_blank">
</head>
<body>
<img src="images/stickman.gif" width="24" height="39" alt="Stickman">
<a href="tags/tag_base.asp">HTML base Tag</a>
</body>
```
| wasifali |
1,884,099 | Top 10 AI Tools for Front-End Developers: Enhancing Productivity and Value | Artificial Intelligence (AI) is revolutionizing the way front-end developers work, offering tools... | 0 | 2024-06-11T07:32:15 | https://dev.to/futuristicgeeks/top-10-ai-tools-for-front-end-developers-enhancing-productivity-and-value-5al | webdev, javascript, programming, developers | Artificial Intelligence (AI) is revolutionizing the way front-end developers work, offering tools that can automate repetitive tasks, enhance code quality, and streamline the development process. Here are the top 10 AI tools that are particularly valuable for front-end developers, along with insights into how they increase productivity and add value.
1. GitHub Copilot
2. TabNine
3. DeepCode
4. Figma with AI Plugins
5. Sketch2Code
6. CodeOcean
7. Visual Studio IntelliCode
8. Sourcery
9. DeepTabNine
10. TensorFlow.js
Read the detailed article here: https://futuristicgeeks.com/top-10-ai-tools-for-front-end-developers-enhancing-productivity-and-value/
Follow us for more tech insights! | futuristicgeeks |
1,884,098 | What makes RDPextra's server the best choice for users? | RDPextra's server stands out for its unparalleled performance and reliability. Users benefit from... | 0 | 2024-06-11T07:28:32 | https://dev.to/evan_355e0089343f226f9453/what-makes-rdpextras-server-the-best-choice-for-users-47k | RDPextra's server stands out for its unparalleled performance and reliability. Users benefit from lightning-fast speeds that make data analysis efficient and hassle-free. The highlight is the 24/7 customer support, ensuring [](https://rdpextra.com/residential-att-rotating-rdp/)a dedicated team promptly addresses any issues. This combination of high-speed performance and exceptional customer service makes RDPextra the best choice for users seeking a robust and dependable RDP solution.
| evan_355e0089343f226f9453 | |
1,884,097 | Master Python Like a Pro: Essential Best Practices for Developers | Python has become a staple in the toolkit of developers and data scientists due to its readability,... | 0 | 2024-06-11T07:27:55 | https://dev.to/futuristicgeeks/master-python-like-a-pro-essential-best-practices-for-developers-140h | webdev, python, developers, datascience | Python has become a staple in the toolkit of developers and data scientists due to its readability, simplicity, and extensive libraries. However, to maximize efficiency and maintainability, it’s crucial to follow best practices. This article outlines essential guidelines for writing clean, efficient, and robust Python code, whether you’re developing applications or working with data.
## 1. Writing Clean Code
**a. Follow PEP 8**
PEP 8 is the style guide for Python code. Adhering to it ensures consistency and readability across your codebase.
- Indentation: Use 4 spaces per indentation level.
- Line Length: Limit lines to 79 characters.
- Blank Lines: Use blank lines to separate functions and classes, and larger blocks of code inside functions.
- Imports: Import one module per line and group standard library imports, third-party imports, and local imports separately.
import os
import sys
import numpy as np
import pandas as pd
from my_module import my_function
**b. Use Meaningful Variable Names**
Choose descriptive names for variables, functions, and classes to make the code self-documenting.
# Bad
a = 10
# Good
number_of_apples = 10
**c. Write Docstrings**
Docstrings are essential for documenting modules, classes, functions, and methods. They help others understand the purpose and usage of your code.
def calculate_area(radius):
"""
Calculate the area of a circle given its radius.
Parameters:
radius (float): The radius of the circle.
Returns:
float: The area of the circle.
"""
return 3.14159 * radius ** 2
## 2. Efficient Data Handling
**a. Use Vectorized Operations with NumPy and Pandas**
Avoid using loops for operations on large datasets. Instead, use vectorized operations provided by libraries like NumPy and Pandas.
import numpy as np
# Bad
numbers = [1, 2, 3, 4, 5]
squared_numbers = []
for number in numbers:
squared_numbers.append(number ** 2)
# Good
numbers = np.array([1, 2, 3, 4, 5])
squared_numbers = numbers ** 2
**b. Leverage Pandas for Data Manipulation**
Pandas is a powerful library for data manipulation and analysis. Familiarize yourself with its capabilities to handle data more efficiently.
import pandas as pd
# Load data
df = pd.read_csv('data.csv')
# Select columns
df = df[['column1', 'column2']]
# Filter rows
df = df[df['column1'] > 10]
# Group and aggregate
grouped_df = df.groupby('column1').mean()
**c. Optimize Memory Usage**
When working with large datasets, optimizing memory usage is crucial. Use appropriate data types and consider using libraries like Dask for parallel computing.
# Use appropriate data types
df['column'] = df['column'].astype('float32')
# Use Dask for parallel computing
import dask.dataframe as dd
ddf = dd.read_csv('large_data.csv')
result = ddf.groupby('column').mean().compute()
## 3. Enhancing Code Performance
**a. Profile Your Code**
Use profiling tools to identify performance bottlenecks. The cProfile module in
Python provides detailed profiling information.
import cProfile
def my_function():
# Your code here
cProfile.run('my_function()')
**b. Use Built-in Functions and Libraries**
Built-in functions and libraries are often optimized for performance. Use them instead of writing custom implementations.
# Bad
squared_numbers = [number ** 2 for number in range(1000)]
# Good
squared_numbers = list(map(lambda x: x ** 2, range(1000)))
**c. Implement Caching**
Caching can significantly improve performance by storing the results of expensive function calls and reusing them when the same inputs occur again.
from functools import lru_cache
@lru_cache(maxsize=100)
def expensive_function(x):
# Expensive computation
return x ** 2
## 4. Ensuring Code Quality
**a. Write Unit Tests**
Unit tests are essential for verifying the correctness of your code. Use frameworks like unittest or pytest to write and run tests.
import unittest
def add(a, b):
return a + b
class TestAddFunction(unittest.TestCase):
def test_add(self):
self.assertEqual(add(2, 3), 5)
self.assertEqual(add(-1, 1), 0)
if __name__ == '__main__':
unittest.main()
**b. Continuous Integration**
Set up continuous integration (CI) to automatically run tests and checks on your codebase. Tools like GitHub Actions, Travis CI, or Jenkins can help automate this process.
c. Code Reviews
Regular code reviews help maintain code quality and share knowledge among team members. Use platforms like GitHub or GitLab to facilitate code reviews.
## 5. Effective Use of Python Libraries
**a. Utilize Python’s Extensive Standard Library**
Python’s standard library is rich with modules and functions that can save you time and effort. Familiarize yourself with libraries like os, sys, json, and datetime.
import json
import os
# Load JSON data
with open('data.json', 'r') as file:
data = json.load(file)
# Get environment variables
home_dir = os.getenv('HOME')
**b. Explore Popular Third-Party Libraries**
In addition to the standard library,Python has a vast ecosystem of third-party libraries that can extend its functionality.
Requests: For making HTTP requests.
BeautifulSoup: For web scraping.
Pandas: For data manipulation and analysis.
NumPy: For numerical computing.
Matplotlib/Seaborn: For data visualization.
import requests
from bs4 import BeautifulSoup
# Fetch web page
response = requests.get('https://example.com')
soup = BeautifulSoup(response.text, 'html.parser')
# Extract and print title
title = soup.title.string
print(title)
Read the complete article on: https://futuristicgeeks.com/master-python-like-a-pro-essential-best-practices-for-developers/ | futuristicgeeks |
1,884,096 | Hello World!! | Hello! My name is Jae. I am a new dev in the making. Looking to enrich my journey with the wisdom of... | 0 | 2024-06-11T07:27:11 | https://dev.to/queenibbytes/hello-world-5226 | Hello! My name is Jae. I am a new dev in the making. Looking to enrich my journey with the wisdom of the abundance of devs out there already and the knowledge you can share. | queenibbytes | |
1,884,095 | Integrate nearly real-time free multi-language translation in the application, based on Chrome AI API | Chrome has integrated AI capabilities in the latest version of Chrome Dev (version 127.0.6512.0 and... | 0 | 2024-06-11T07:26:51 | https://dev.to/sagacheng/integrate-nearly-real-time-free-multi-language-translation-in-the-application-based-on-chrome-ai-api-2d5m | webdev, chrome, ai | Chrome has integrated AI capabilities in the latest version of Chrome Dev (version 127.0.6512.0 and above), provided in the form of experimental flags.
Download the latest Chrome Dev: https://www.google.com/intl/en_us/chrome/dev/
## Chrome Dev Configuration
1. Verify that the Chrome Dev version is higher than 127.0.6512.0
2. In the URL input: `chrome://flags/#optimization-guide-on-device-model`, choose `Enabled BypassPerfRequirement` to allow the model to download smoothly.
3. In the URL input: `chrome://flags/#prompt-api-for-gemini-nano`, select `Enabled`.
4. Wait for the model to finish downloading. You can check whether the download is complete at `chrome://components/`. If it does not start downloading automatically, you can click `Check for update` to force the download, which will need to download about 1GB of content. When you see Version: 2024.65.2205, it means it can be used. Restart Chrome Dev.
## API Capability Testing
Open the command line with `cmd + option + I`, enter `await window.ai.canCreateTextSession();`, when you see "readily" it means it can be used.
### Case 1: Rewriting the tone of the text
We can see that with just two lines of code, we can solve the text expression problem that troubles many people, and it can be done with extremely fast speed and excellent privacy.
### Case Study 2: Text Translation
Complete text translation in a fast and free way, making multi-language display of any application more convenient.
## Integration within the application
Our app [https://timmerse.com](https://timmerse.com/) is a customizable 3D immersive world, suitable for work and entertainment. Create a space to achieve immersive connections between people. Combining video calls and custom 3D worlds, integrating AI NPC, makes gatherings in work and life more creative and enjoyable.
When playing videos in the OpenDay scene, we can easily translate and display the original English subtitles into bilingual subtitles in real time according to the user's Chrome language preference.
Of course, the llm model is not just for translation. With the wide spread of various end-side models and multimodal, it will definitely change the way people interact with devices in various ways, improving the efficiency of life and work. | sagacheng |
1,884,093 | Significance of App Scalability Testing: Ensuring Seamless Performance in a Growing User Base | In today's digital era, where mobile applications have become an integral part of our lives, ensuring... | 0 | 2024-06-11T07:24:07 | https://dev.to/talenttinaapi/significance-of-app-scalability-testing-ensuring-seamless-performance-in-a-growing-user-base-3l8l | testing, automation, mobile, scalability | In today's digital era, where mobile applications have become an integral part of our lives, ensuring seamless performance and scalability is crucial for an app’s success. App scalability testing plays a vital role in identifying potential bottlenecks and ensuring that the application can handle an ever-growing user base without compromising performance or user experience. This article explores the significance of app scalability testing and why it should be an integral part of the app development process.
**What is Scalability Testing? Why is it Important?**
Scalability refers to the ability of an application to handle increased workload and user demands as the user base grows. As an app gains popularity and attracts more users, it must be capable of handling the increased traffic, data processing, and concurrent user interactions. Failure to scale appropriately can result in sluggish performance, crashes, or even complete downtime, leading to user frustration, negative reviews, and ultimately, loss of users and revenue.
App scalability testing helps identify performance limitations and bottlenecks in the application architecture, infrastructure, or codebase before it's deployed to a larger audience. By subjecting the application to realistic and higher-than-normal user loads, scalability testing simulates real-world usage scenarios and provides valuable insights into how the app performs under stress.
One of the primary goals of scalability testing is to determine the maximum capacity of the application. Testers gradually increase the workload and measure how the system responds to the additional load. This process helps identify the breaking point or the threshold beyond which the app's performance starts to degrade. By identifying this critical limit, developers can make informed decisions to optimize the app's architecture, infrastructure, or code to handle higher loads.
Additionally, scalability testing also helps identify performance bottlenecks within the application. It helps pinpoint areas where the application might struggle to handle increased traffic or concurrent user interactions. These bottlenecks can be caused by inefficient algorithms, poorly optimized database queries, network latency, or other architectural weaknesses. By identifying these bottlenecks early on, developers can take corrective measures to enhance the app's performance, improve response times, and ensure a smooth user experience.
Furthermore, scalability testing allows developers to evaluate the application's ability to scale horizontally or vertically. Horizontal scaling involves adding more instances or servers to distribute the workload, while vertical scaling involves increasing the resources (CPU, memory, etc.) of a single instance. By testing the application's scalability, developers can determine the most effective scaling strategy for their specific application and infrastructure.
App scalability testing is not a one-time activity but an iterative process. As an application evolves and grows, its scalability needs may change. Regular scalability testing allows developers to validate the effectiveness of optimization measures, infrastructure upgrades, or code changes implemented to improve performance. It ensures that the application remains scalable and capable of handling the increasing demands of its user base.
**Conclusion**
App scalability testing is of paramount importance in today's competitive app landscape. It enables developers to identify performance limitations, optimize the application's architecture and infrastructure, and ensure a seamless user experience as the user base grows. By subjecting the application to realistic and higher-than-normal user loads, scalability testing helps uncover bottlenecks and allows developers to take proactive measures to enhance performance and scalability. Incorporating scalability testing as a crucial part of the app development process helps build robust and scalable applications that can handle the demands of an ever-growing user base. | talenttinaapi |
1,884,092 | Folder structure in an industry-standard project | In this blog, we will see how to organize files and folders in a way so that they can be manageable... | 0 | 2024-06-11T07:22:59 | https://dev.to/md_enayeturrahman_2560e3/folder-structure-in-an-industry-standard-project-271b | javascript, node, express, typescript | - In this blog, we will see how to organize files and folders in a way so that they can be manageable as well as scalable. This is the second blog of a series of blogs about how to create industry-standard projects. You can read the first blog from the following link.
https://dev.to/md_enayeturrahman_2560e3/how-to-set-up-eslint-and-prettier-1nk6
- The structure can be visually shown as follows
```
my-express-app/
│
├── .env
├── .eslintignore
├── .eslintrc.json
├── .gitignore
├── .prettierrc.json
├── package.json
├── tsconfig.json
│
├── node_modules/
│
├── src/
│ ├── app/
│ │ ├── builder/
│ │ │ └── QueryBuilder.ts
│ │ ├── config/
│ │ │ └── index.ts
│ │ ├── errors/
│ │ │ ├── AppError.ts
│ │ │ ├── handleCastError.ts
│ │ │ ├── handleDuplicateError.ts
│ │ │ ├── handleValidationError.ts
│ │ │ └── handleZodError.ts
│ │ ├── interface/
│ │ │ ├── error.ts
│ │ │ └── index.d.ts
│ │ ├── middleware/
│ │ │ ├── auth.ts
│ │ │ ├── globalErrorhandler.ts
│ │ │ ├── notFound.ts
│ │ │ └── validateRequest.ts
│ │ ├── modules/
│ │ │ ├── Admin/
│ │ │ │ ├── AdminConstant.ts
│ │ │ │ ├── AdminController.ts
│ │ │ │ ├── AdminInterface.ts
│ │ │ │ ├── AdminModel.ts
│ │ │ │ ├── AdminRoute.ts
│ │ │ │ └── AdminValidation.ts
│ │ │ ├── Auth/
│ │ │ │ ├── AuthConstant.ts
│ │ │ │ ├── AuthController.ts
│ │ │ │ ├── AuthInterface.ts
│ │ │ │ ├── AuthModel.ts
│ │ │ │ ├── AuthRoute.ts
│ │ │ │ └── AuthValidation.ts
│ │ │ ├── Course/
│ │ │ │ ├── CourseConstant.ts
│ │ │ │ ├── CourseController.ts
│ │ │ │ ├── CourseInterface.ts
│ │ │ │ ├── CourseModel.ts
│ │ │ │ ├── CourseRoute.ts
│ │ │ │ └── CourseValidation.ts
│ │ │ ├── Faculty/
│ │ │ │ ├── FacultyConstant.ts
│ │ │ │ ├── FacultyController.ts
│ │ │ │ ├── FacultyInterface.ts
│ │ │ │ ├── FacultyModel.ts
│ │ │ │ ├── FacultyRoute.ts
│ │ │ │ └── FacultyValidation.ts
│ │ │ ├── OfferedCourse/
│ │ │ │ ├── OfferedCourseConstant.ts
│ │ │ │ ├── OfferedCourseController.ts
│ │ │ │ ├── OfferedCourseInterface.ts
│ │ │ │ ├── OfferedCourseModel.ts
│ │ │ │ ├── OfferedCourseRoute.ts
│ │ │ │ └── OfferedCourseValidation.ts
│ │ │ ├── AcademicDepartment/
│ │ │ │ ├── AcademicDepartmentConstant.ts
│ │ │ │ ├── AcademicDepartmentController.ts
│ │ │ │ ├── AcademicDepartmentInterface.ts
│ │ │ │ ├── AcademicDepartmentModel.ts
│ │ │ │ ├── AcademicDepartmentRoute.ts
│ │ │ │ └── AcademicDepartmentValidation.ts
│ │ │ ├── AcademicFaculty/
│ │ │ │ ├── AcademicFacultyConstant.ts
│ │ │ │ ├── AcademicFacultyController.ts
│ │ │ │ ├── AcademicFacultyInterface.ts
│ │ │ │ ├── AcademicFacultyModel.ts
│ │ │ │ ├── AcademicFacultyRoute.ts
│ │ │ │ └── AcademicFacultyValidation.ts
│ │ │ ├── AcademicSemester/
│ │ │ │ ├── AcademicSemesterConstant.ts
│ │ │ │ ├── AcademicSemesterController.ts
│ │ │ │ ├── AcademicSemesterInterface.ts
│ │ │ │ ├── AcademicSemesterModel.ts
│ │ │ │ ├── AcademicSemesterRoute.ts
│ │ │ │ └── AcademicSemesterValidation.ts
│ │ │ ├── SemesterRegistration/
│ │ │ │ ├── SemesterRegistrationConstant.ts
│ │ │ │ ├── SemesterRegistrationController.ts
│ │ │ │ ├── SemesterRegistrationInterface.ts
│ │ │ │ ├── SemesterRegistrationModel.ts
│ │ │ │ ├── SemesterRegistrationRoute.ts
│ │ │ │ └── SemesterRegistrationValidation.ts
│ │ │ ├── Student/
│ │ │ │ ├── StudentConstant.ts
│ │ │ │ ├── StudentController.ts
│ │ │ │ ├── StudentInterface.ts
│ │ │ │ ├── StudentModel.ts
│ │ │ │ ├── StudentRoute.ts
│ │ │ │ └── StudentValidation.ts
│ │ │ ├── User/
│ │ │ │ ├── UserConstant.ts
│ │ │ │ ├── UserController.ts
│ │ │ │ ├── UserInterface.ts
│ │ │ │ ├── UserModel.ts
│ │ │ │ ├── UserRoute.ts
│ │ │ │ └── UserValidation.ts
│ │ ├── routes/
│ │ │ └── index.ts
│ │ ├── utils/
│ │ │ ├── catchAsync.ts
│ │ │ └── sendResponse.ts
│ ├── app.ts
│ └── server.js
```
- In your root directory there should be two folders- src and dist. The content of the dist folder will be created automatically when the typescript file is converted to a javascript file. So you need not have to add anything to this folder. Just create it.
- The src folder is where you should organize all your code files. We will discuss it later first let's look at what files you should keep in the root folder.
- The root folder should contain various configuration files like .eslintignore, .eslintrc.json, .gitignore, .prettierrc.json, jackage.json, tsconfig.json, etc.
- Inside the src folder there should be app.ts and server.ts files. The server.ts file will be the entry point of your project. It will mainly contain the database connection and server close logic. A sample of code will be as follows
```javascript
import { Server } from 'http';
import mongoose from 'mongoose';
import app from './app';
import config from './app/config';
let server: Server;
async function main() {
try {
await mongoose.connect(config.database_url as string);
server = app.listen(config.port, () => {
console.log(`app is listening on port ${config.port}`);
});
} catch (err) {
console.log(err);
}
}
main();
process.on('unhandledRejection', () => {
console.log(`😈 unahandledRejection is detected , shutting down ...`);
if (server) {
server.close(() => {
process.exit(1);
});
}
process.exit(1);
});
process.on('uncaughtException', () => {
console.log(`😈 uncaughtException is detected , shutting down ...`);
process.exit(1);
});
```
- The app.ts file will initiate the express, containing code related to body-parser, cookie parser, cors, base route, global error handler, and not found route handler. A sample code will be as follows:
```javascript
import cookieParser from 'cookie-parser';
import cors from 'cors';
import express, { Application } from 'express';
import globalErrorHandler from './app/middlewares/globalErrorhandler';
import notFound from './app/middlewares/notFound';
import router from './app/routes';
const app: Application = express();
//parsers
app.use(express.json());
app.use(cookieParser());
app.use(cors({ origin: ['http://localhost:5173'] }));
// application routes
app.use('/api/v1', router);
app.use(globalErrorHandler);
//Not Found
app.use(notFound);
export default app;
```
- Inside the src folder there should be an app folder that will hold all the remaining codes of the projects. We will alphabetically explain them below:
- The first folder inside the app folder will be the builder folder. This will contain files such as QueryBuilder.ts. This file contains all the code related to the query e.g. search, filter, sort, paginate, fields, etc. This file is typically connected with the service file of a given route. Its sample code will be as follows
```javascript
import { FilterQuery, Query } from 'mongoose';
class QueryBuilder<T> {
public modelQuery: Query<T[], T>;
public query: Record<string, unknown>;
constructor(modelQuery: Query<T[], T>, query: Record<string, unknown>) {
this.modelQuery = modelQuery;
this.query = query;
}
search(searchableFields: string[]) {
const searchTerm = this?.query?.searchTerm;
if (searchTerm) {
this.modelQuery = this.modelQuery.find({
$or: searchableFields.map(
(field) =>
({
[field]: { $regex: searchTerm, $options: 'i' },
}) as FilterQuery<T>,
),
});
}
return this;
}
filter() {
const queryObj = { ...this.query }; // copy
// Filtering
const excludeFields = ['searchTerm', 'sort', 'limit', 'page', 'fields'];
excludeFields.forEach((el) => delete queryObj[el]);
this.modelQuery = this.modelQuery.find(queryObj as FilterQuery<T>);
return this;
}
sort() {
const sort =
(this?.query?.sort as string)?.split(',')?.join(' ') || '-createdAt';
this.modelQuery = this.modelQuery.sort(sort as string);
return this;
}
paginate() {
const page = Number(this?.query?.page) || 1;
const limit = Number(this?.query?.limit) || 10;
const skip = (page - 1) * limit;
this.modelQuery = this.modelQuery.skip(skip).limit(limit);
return this;
}
fields() {
const fields =
(this?.query?.fields as string)?.split(',')?.join(' ') || '-__v';
this.modelQuery = this.modelQuery.select(fields);
return this;
}
}
export default QueryBuilder;
```
- Then comes the config folder that contains index.ts file. This file is used to organize all the environmental variables from the .env file. It acts as a single point that exports all the environmental variables. Its content looks as follows:
```javascript
import dotenv from "dotenv";
dotenv.config();
export default {
NODE_ENV: process.env.NODE_ENV,
port: process.env.PORT,
database_url: process.env.DATABASE_URL,
bcrypt_salt_rounds: process.env.BCRYPT_SALT_ROUNDS,
default_password: process.env.DEFAULT_PASS,
jwt_access_secret: process.env.JWT_ACCESS_SECRET,
jwt_refresh_secret: process.env.JWT_REFRESH_SECRET,
jwt_access_expires_in: process.env.JWT_ACCESS_EXPIRES_IN,
jwt_refresh_expires_in: process.env.JWT_REFRESH_EXPIRES_IN,
};
```
- Then comes the errors folder. It is very important in an industry-grade project. Handling errors is crucial for the proper functioning of an app. There are several files that deal with different types of errors. Different type of error files that can be used in a project is explained below:
- The AppError.ts file is normally used to deal status code and stack of an error. For proper managing and maintaining of code, it uses Class to handle errors. Its content could be as follows
```javascript
class AppError extends Error {
public statusCode: number;
constructor(statusCode: number, message: string, stack = '') {
super(message);
this.statusCode = statusCode;
if (stack) {
this.stack = stack;
} else {
Error.captureStackTrace(this, this.constructor);
}
}
}
export default AppError;
```
- Then comes handleCastError.ts file that deals with cast errors as suggested by the name. Its sample content will be as follows:
```javascript
import mongoose from 'mongoose';
import { TErrorSources, TGenericErrorResponse } from '../interface/error';
const handleCastError = (
err: mongoose.Error.CastError,
): TGenericErrorResponse => {
const errorSources: TErrorSources = [
{
path: err.path,
message: err.message,
},
];
const statusCode = 400;
return {
statusCode,
message: 'Invalid ID',
errorSources,
};
};
export default handleCastError;
```
- Then comes handleDuplicateError.ts file and from the name we can understand what kind of error it deals it. Its sample content could be as follows:
```javascript
/* eslint-disable @typescript-eslint/no-explicit-any */
import { TErrorSources, TGenericErrorResponse } from '../interface/error';
const handleDuplicateError = (err: any): TGenericErrorResponse => {
// Extract value within double quotes using regex
const match = err.message.match(/"([^"]*)"/);
// The extracted value will be in the first capturing group
const extractedMessage = match && match[1];
const errorSources: TErrorSources = [
{
path: '',
message: `${extractedMessage} is already exists`,
},
];
const statusCode = 400;
return {
statusCode,
message: 'Invalid ID',
errorSources,
};
};
export default handleDuplicateError;
```
- After that handleValidationError.ts file comes. This file typically deals with the mongoose error. Its typical content will be as follows:
```javascript
import mongoose from 'mongoose';
import { TErrorSources, TGenericErrorResponse } from '../interface/error';
const handleValidationError = (
err: mongoose.Error.ValidationError,
): TGenericErrorResponse => {
const errorSources: TErrorSources = Object.values(err.errors).map(
(val: mongoose.Error.ValidatorError | mongoose.Error.CastError) => {
return {
path: val?.path,
message: val?.message,
};
},
);
const statusCode = 400;
return {
statusCode,
message: 'Validation Error',
errorSources,
};
};
export default handleValidationError;
```
- At last comes handleZodError.ts file that deals with errors sent by Zod. Its typical content will be as follows:
```javascript
import { ZodError, ZodIssue } from 'zod';
import { TErrorSources, TGenericErrorResponse } from '../interface/error';
const handleZodError = (err: ZodError): TGenericErrorResponse => {
const errorSources: TErrorSources = err.issues.map((issue: ZodIssue) => {
return {
path: issue?.path[issue.path.length - 1],
message: issue.message,
};
});
const statusCode = 400;
return {
statusCode,
message: 'Validation Error',
errorSources,
};
};
export default handleZodError;
```
- All the above file is used not only to catch errors but also managed them in a uniform way so that the front end receives the same message irrespective of the type and message of the error.
- There will be another blog in this series that will explain how to manage errors in an industry-grade project with an explanation and beginning to the end.
- Now comes the interface file. Interfaces related to each module are kept in their respective folder. This folder hosts an interface that is general in nature. e.g. error.ts file host interface related to error message. index.d.ts contain an interface related to jwt. The sample code is given below:
```javascript
export type TErrorSources = {
path: string | number;
message: string;
}[];
export type TGenericErrorResponse = {
statusCode: number;
message: string;
errorSources: TErrorSources;
};
```
```javascript
import { JwtPayload } from 'jsonwebtoken';
declare global {
namespace Express {
interface Request {
user: JwtPayload;
}
}
}
```
- Now comes the middleware folder that holds all the middleware functions of the project. In our case, we have four files inside this folder. The auth.ts file holds token verification logic. Example code is as follows
```javascript
import { NextFunction, Request, Response } from 'express';
import httpStatus from 'http-status';
import jwt, { JwtPayload } from 'jsonwebtoken';
import config from '../config';
import AppError from '../errors/AppError';
import { TUserRole } from '../modules/user/user.interface';
import { User } from '../modules/user/user.model';
import catchAsync from '../utils/catchAsync';
const auth = (...requiredRoles: TUserRole[]) => {
return catchAsync(async (req: Request, res: Response, next: NextFunction) => {
const token = req.headers.authorization;
// checking if the token is missing
if (!token) {
throw new AppError(httpStatus.UNAUTHORIZED, 'You are not authorized!');
}
// checking if the given token is valid
const decoded = jwt.verify(
token,
config.jwt_access_secret as string,
) as JwtPayload;
const { role, userId, iat } = decoded;
// checking if the user exists
const user = await User.isUserExistsByCustomId(userId);
if (!user) {
throw new AppError(httpStatus.NOT_FOUND, 'This user is not found !');
}
// checking if the user has already deleted
const isDeleted = user?.isDeleted;
if (isDeleted) {
throw new AppError(httpStatus.FORBIDDEN, 'This user is deleted !');
}
// checking if the user is blocked
const userStatus = user?.status;
if (userStatus === 'blocked') {
throw new AppError(httpStatus.FORBIDDEN, 'This user is blocked ! !');
}
if (
user.passwordChangedAt &&
User.isJWTIssuedBeforePasswordChanged(
user.passwordChangedAt,
iat as number,
)
) {
throw new AppError(httpStatus.UNAUTHORIZED, 'You are not authorized !');
}
if (requiredRoles && !requiredRoles.includes(role)) {
throw new AppError(
httpStatus.UNAUTHORIZED,
'You are not authorized hi!',
);
}
req.user = decoded as JwtPayload;
next();
});
};
export default auth;
```
- Then we have globalErrorhandler.ts file that holds all the error-related logic. Its content is as follows:
```javascript
import { ErrorRequestHandler } from 'express';
import { ZodError } from 'zod';
import config from '../config';
import AppError from '../errors/AppError';
import handleCastError from '../errors/handleCastError';
import handleDuplicateError from '../errors/handleDuplicateError';
import handleValidationError from '../errors/handleValidationError';
import handleZodError from '../errors/handleZodError';
import { TErrorSources } from '../interface/error';
const globalErrorHandler: ErrorRequestHandler = (err, req, res, next) => {
//setting default values
let statusCode = 500;
let message = 'Something went wrong!';
let errorSources: TErrorSources = [
{
path: '',
message: 'Something went wrong',
},
];
if (err instanceof ZodError) {
const simplifiedError = handleZodError(err);
statusCode = simplifiedError?.statusCode;
message = simplifiedError?.message;
errorSources = simplifiedError?.errorSources;
} else if (err?.name === 'ValidationError') {
const simplifiedError = handleValidationError(err);
statusCode = simplifiedError?.statusCode;
message = simplifiedError?.message;
errorSources = simplifiedError?.errorSources;
} else if (err?.name === 'CastError') {
const simplifiedError = handleCastError(err);
statusCode = simplifiedError?.statusCode;
message = simplifiedError?.message;
errorSources = simplifiedError?.errorSources;
} else if (err?.code === 11000) {
const simplifiedError = handleDuplicateError(err);
statusCode = simplifiedError?.statusCode;
message = simplifiedError?.message;
errorSources = simplifiedError?.errorSources;
} else if (err instanceof AppError) {
statusCode = err?.statusCode;
message = err.message;
errorSources = [
{
path: '',
message: err?.message,
},
];
} else if (err instanceof Error) {
message = err.message;
errorSources = [
{
path: '',
message: err?.message,
},
];
}
//ultimate return
return res.status(statusCode).json({
success: false,
message,
errorSources,
err,
stack: config.NODE_ENV === 'development' ? err?.stack : null,
});
};
export default globalErrorHandler;
```
- After that there is notFound.ts file that holds the logic for notFound route and it is connected to the app.ts file.
```javascript
import { NextFunction, Request, Response } from 'express';
import httpStatus from 'http-status';
const notFound = (req: Request, res: Response, next: NextFunction) => {
return res.status(httpStatus.NOT_FOUND).json({
success: false,
message: 'API Not Found !!',
error: '',
});
};
export default notFound;
```
- Then comes validateRequest.ts file which contains zod related validation code.
```javascript
import { NextFunction, Request, Response } from 'express';
import { AnyZodObject } from 'zod';
import catchAsync from '../utils/catchAsync';
const validateRequest = (schema: AnyZodObject) => {
return catchAsync(async (req: Request, res: Response, next: NextFunction) => {
await schema.parseAsync({
body: req.body,
cookies: req.cookies,
});
next();
});
};
export default validateRequest;
```
- The modules folder is the main folder that holds interface, model, schema, controller, validation, service, etc code. In our modules folder, we have sub-folders for different routes such as Admin, Auth, Course, Faculty, OfferedCourse, AcademicDepartment, AcademicFaculty, AcademicSemester, Student, and User. In your project, these folders will vary depending on your project requirement.
- Typically inside a module folder following files are kept. A route.ts file that contains all routes related to that module. A controller.ts file that contains the controller for each route. A service.ts file that contains all the business logic. An interface.ts file that holds the interface. A model.ts file that contains mongoose schema and model. A validation.ts file that contains zod validation-related code. A constant.ts file that contains constant code. The sample code for each file is given below:
```javascript
// student.constant.ts
export const studentSearchableFields = [
'email',
'name.firstName',
'presentAddress',
];
```
```javascript
// student.controller.ts
import { RequestHandler } from 'express';
import httpStatus from 'http-status';
import catchAsync from '../../utils/catchAsync';
import sendResponse from '../../utils/sendResponse';
import { StudentServices } from './student.service';
const getSingleStudent = catchAsync(async (req, res) => {
const { id } = req.params;
const result = await StudentServices.getSingleStudentFromDB(id);
sendResponse(res, {
statusCode: httpStatus.OK,
success: true,
message: 'Student is retrieved succesfully',
data: result,
});
});
const getAllStudents: RequestHandler = catchAsync(async (req, res) => {
const result = await StudentServices.getAllStudentsFromDB(req.query);
sendResponse(res, {
statusCode: httpStatus.OK,
success: true,
message: 'Student are retrieved succesfully',
data: result,
});
});
const updateStudent = catchAsync(async (req, res) => {
const { id } = req.params;
const { student } = req.body;
const result = await StudentServices.updateStudentIntoDB(id, student);
sendResponse(res, {
statusCode: httpStatus.OK,
success: true,
message: 'Student is updated succesfully',
data: result,
});
});
const deleteStudent = catchAsync(async (req, res) => {
const { id } = req.params;
const result = await StudentServices.deleteStudentFromDB(id);
sendResponse(res, {
statusCode: httpStatus.OK,
success: true,
message: 'Student is deleted succesfully',
data: result,
});
});
export const StudentControllers = {
getAllStudents,
getSingleStudent,
deleteStudent,
updateStudent,
};
```
```javascript
// student.interface.ts
import { Model, Types } from 'mongoose';
export type TUserName = {
firstName: string;
middleName: string;
lastName: string;
};
export type TGuardian = {
fatherName: string;
fatherOccupation: string;
fatherContactNo: string;
motherName: string;
motherOccupation: string;
motherContactNo: string;
};
export type TLocalGuardian = {
name: string;
occupation: string;
contactNo: string;
address: string;
};
export type TStudent = {
id: string;
user: Types.ObjectId;
name: TUserName;
gender: 'male' | 'female' | 'other';
dateOfBirth?: Date;
email: string;
contactNo: string;
emergencyContactNo: string;
bloogGroup?: 'A+' | 'A-' | 'B+' | 'B-' | 'AB+' | 'AB-' | 'O+' | 'O-';
presentAddress: string;
permanentAddress: string;
guardian: TGuardian;
localGuardian: TLocalGuardian;
profileImg?: string;
admissionSemester: Types.ObjectId;
academicDepartment: Types.ObjectId;
isDeleted: boolean;
};
//for creating static
export interface StudentModel extends Model<TStudent> {
isUserExists(id: string): Promise<TStudent | null>;
}
// for creating an instance
// export interface StudentMethods {
// isUserExists(id: string): Promise<TStudent | null>;
// }
// export type StudentModel = Model<
// TStudent,
// Record<string, never>,
// StudentMethods
// >;
```
```javascript
// student.model.ts
import { Schema, model } from 'mongoose';
import {
StudentModel,
TGuardian,
TLocalGuardian,
TStudent,
TUserName,
} from './student.interface';
const userNameSchema = new Schema<TUserName>({
firstName: {
type: String,
required: [true, 'First Name is required'],
trim: true,
maxlength: [20, 'Name can not be more than 20 characters'],
},
middleName: {
type: String,
trim: true,
},
lastName: {
type: String,
trim: true,
required: [true, 'Last Name is required'],
maxlength: [20, 'Name can not be more than 20 characters'],
},
});
const guardianSchema = new Schema<TGuardian>({
fatherName: {
type: String,
trim: true,
required: [true, 'Father Name is required'],
},
fatherOccupation: {
type: String,
trim: true,
required: [true, 'Father occupation is required'],
},
fatherContactNo: {
type: String,
required: [true, 'Father Contact No is required'],
},
motherName: {
type: String,
required: [true, 'Mother Name is required'],
},
motherOccupation: {
type: String,
required: [true, 'Mother occupation is required'],
},
motherContactNo: {
type: String,
required: [true, 'Mother Contact No is required'],
},
});
const localGuradianSchema = new Schema<TLocalGuardian>({
name: {
type: String,
required: [true, 'Name is required'],
},
occupation: {
type: String,
required: [true, 'Occupation is required'],
},
contactNo: {
type: String,
required: [true, 'Contact number is required'],
},
address: {
type: String,
required: [true, 'Address is required'],
},
});
const studentSchema = new Schema<TStudent, StudentModel>(
{
id: {
type: String,
required: [true, 'ID is required'],
unique: true,
},
user: {
type: Schema.Types.ObjectId,
required: [true, 'User id is required'],
unique: true,
ref: 'User',
},
name: {
type: userNameSchema,
required: [true, 'Name is required'],
},
gender: {
type: String,
enum: {
values: ['male', 'female', 'other'],
message: '{VALUE} is not a valid gender',
},
required: [true, 'Gender is required'],
},
dateOfBirth: { type: Date },
email: {
type: String,
required: [true, 'Email is required'],
unique: true,
},
contactNo: { type: String, required: [true, 'Contact number is required'] },
emergencyContactNo: {
type: String,
required: [true, 'Emergency contact number is required'],
},
bloogGroup: {
type: String,
enum: {
values: ['A+', 'A-', 'B+', 'B-', 'AB+', 'AB-', 'O+', 'O-'],
message: '{VALUE} is not a valid blood group',
},
},
presentAddress: {
type: String,
required: [true, 'Present address is required'],
},
permanentAddress: {
type: String,
required: [true, 'Permanent address is required'],
},
guardian: {
type: guardianSchema,
required: [true, 'Guardian information is required'],
},
localGuardian: {
type: localGuradianSchema,
required: [true, 'Local guardian information is required'],
},
profileImg: { type: String },
admissionSemester: {
type: Schema.Types.ObjectId,
ref: 'AcademicSemester',
},
isDeleted: {
type: Boolean,
default: false,
},
academicDepartment: {
type: Schema.Types.ObjectId,
ref: 'AcademicDepartment',
},
},
{
toJSON: {
virtuals: true,
},
},
);
//virtual
studentSchema.virtual('fullName').get(function () {
return this?.name?.firstName + this?.name?.middleName + this?.name?.lastName;
});
// Query Middleware
studentSchema.pre('find', function (next) {
this.find({ isDeleted: { $ne: true } });
next();
});
studentSchema.pre('findOne', function (next) {
this.find({ isDeleted: { $ne: true } });
next();
});
studentSchema.pre('aggregate', function (next) {
this.pipeline().unshift({ $match: { isDeleted: { $ne: true } } });
next();
});
//creating a custom static method
studentSchema.statics.isUserExists = async function (id: string) {
const existingUser = await Student.findOne({ id });
return existingUser;
};
export const Student = model<TStudent, StudentModel>('Student', studentSchema);
```
```javascript
// student.route.ts
import express from 'express';
import validateRequest from '../../middlewares/validateRequest';
import { StudentControllers } from './student.controller';
import { updateStudentValidationSchema } from './student.validation';
const router = express.Router();
router.get('/', StudentControllers.getAllStudents);
router.get('/:id', StudentControllers.getSingleStudent);
router.patch(
'/:id',
validateRequest(updateStudentValidationSchema),
StudentControllers.updateStudent,
);
router.delete('/:id', StudentControllers.deleteStudent);
export const StudentRoutes = router;
```
```javascript
// student.service.ts
import httpStatus from 'http-status';
import mongoose from 'mongoose';
import QueryBuilder from '../../builder/QueryBuilder';
import AppError from '../../errors/AppError';
import { User } from '../user/user.model';
import { studentSearchableFields } from './student.constant';
import { TStudent } from './student.interface';
import { Student } from './student.model';
const getAllStudentsFromDB = async (query: Record<string, unknown>) => {
/*
const queryObj = { ...query }; // copying req.query object so that we can mutate the copy object
let searchTerm = ''; // SET DEFAULT VALUE
// IF searchTerm IS GIVEN SET IT
if (query?.searchTerm) {
searchTerm = query?.searchTerm as string;
}
// HOW OUR FORMAT SHOULD BE FOR PARTIAL MATCH :
{ email: { $regex : query.searchTerm , $options: i}}
{ presentAddress: { $regex : query.searchTerm , $options: i}}
{ 'name.firstName': { $regex : query.searchTerm , $options: i}}
// WE ARE DYNAMICALLY DOING IT USING LOOP
const searchQuery = Student.find({
$or: studentSearchableFields.map((field) => ({
[field]: { $regex: searchTerm, $options: 'i' },
})),
});
// FILTERING fUNCTIONALITY:
const excludeFields = ['searchTerm', 'sort', 'limit', 'page', 'fields'];
excludeFields.forEach((el) => delete queryObj[el]); // DELETING THE FIELDS SO THAT IT CAN'T MATCH OR FILTER EXACTLY
const filterQuery = searchQuery
.find(queryObj)
.populate('admissionSemester')
.populate({
path: 'academicDepartment',
populate: {
path: 'academicFaculty',
},
});
// SORTING FUNCTIONALITY:
let sort = '-createdAt'; // SET DEFAULT VALUE
// IF sort IS GIVEN SET IT
if (query.sort) {
sort = query.sort as string;
}
const sortQuery = filterQuery.sort(sort);
// PAGINATION FUNCTIONALITY:
let page = 1; // SET DEFAULT VALUE FOR PAGE
let limit = 1; // SET DEFAULT VALUE FOR LIMIT
let skip = 0; // SET DEFAULT VALUE FOR SKIP
// IF limit IS GIVEN SET IT
if (query.limit) {
limit = Number(query.limit);
}
// IF page IS GIVEN SET IT
if (query.page) {
page = Number(query.page);
skip = (page - 1) * limit;
}
const paginateQuery = sortQuery.skip(skip);
const limitQuery = paginateQuery.limit(limit);
// FIELDS LIMITING FUNCTIONALITY:
// HOW OUR FORMAT SHOULD BE FOR PARTIAL MATCH
fields: 'name,email'; // WE ARE ACCEPTING FROM REQUEST
fields: 'name email'; // HOW IT SHOULD BE
let fields = '-__v'; // SET DEFAULT VALUE
if (query.fields) {
fields = (query.fields as string).split(',').join(' ');
}
const fieldQuery = await limitQuery.select(fields);
return fieldQuery;
*/
const studentQuery = new QueryBuilder(
Student.find()
.populate('user')
.populate('admissionSemester')
.populate({
path: 'academicDepartment',
populate: {
path: 'academicFaculty',
},
}),
query,
)
.search(studentSearchableFields)
.filter()
.sort()
.paginate()
.fields();
const result = await studentQuery.modelQuery;
return result;
};
const getSingleStudentFromDB = async (id: string) => {
const result = await Student.findById(id)
.populate('admissionSemester')
.populate({
path: 'academicDepartment',
populate: {
path: 'academicFaculty',
},
});
return result;
};
const updateStudentIntoDB = async (id: string, payload: Partial<TStudent>) => {
const { name, guardian, localGuardian, ...remainingStudentData } = payload;
const modifiedUpdatedData: Record<string, unknown> = {
...remainingStudentData,
};
/*
guardain: {
fatherOccupation:"Teacher"
}
guardian.fatherOccupation = Teacher
name.firstName = 'Mezba'
name.lastName = 'Abedin'
*/
if (name && Object.keys(name).length) {
for (const [key, value] of Object.entries(name)) {
modifiedUpdatedData[`name.${key}`] = value;
}
}
if (guardian && Object.keys(guardian).length) {
for (const [key, value] of Object.entries(guardian)) {
modifiedUpdatedData[`guardian.${key}`] = value;
}
}
if (localGuardian && Object.keys(localGuardian).length) {
for (const [key, value] of Object.entries(localGuardian)) {
modifiedUpdatedData[`localGuardian.${key}`] = value;
}
}
const result = await Student.findByIdAndUpdate(id, modifiedUpdatedData, {
new: true,
runValidators: true,
});
return result;
};
const deleteStudentFromDB = async (id: string) => {
const session = await mongoose.startSession();
try {
session.startTransaction();
const deletedStudent = await Student.findByIdAndUpdate(
id,
{ isDeleted: true },
{ new: true, session },
);
if (!deletedStudent) {
throw new AppError(httpStatus.BAD_REQUEST, 'Failed to delete student');
}
// get user _id from deletedStudent
const userId = deletedStudent.user;
const deletedUser = await User.findByIdAndUpdate(
userId,
{ isDeleted: true },
{ new: true, session },
);
if (!deletedUser) {
throw new AppError(httpStatus.BAD_REQUEST, 'Failed to delete user');
}
await session.commitTransaction();
await session.endSession();
return deletedStudent;
} catch (err) {
await session.abortTransaction();
await session.endSession();
throw new Error('Failed to delete student');
}
};
export const StudentServices = {
getAllStudentsFromDB,
getSingleStudentFromDB,
updateStudentIntoDB,
deleteStudentFromDB,
};
```
```javascript
// student.validation.ts
import { z } from 'zod';
const createUserNameValidationSchema = z.object({
firstName: z
.string()
.min(1)
.max(20)
.refine((value) => /^[A-Z]/.test(value), {
message: 'First Name must start with a capital letter',
}),
middleName: z.string(),
lastName: z.string(),
});
const createGuardianValidationSchema = z.object({
fatherName: z.string(),
fatherOccupation: z.string(),
fatherContactNo: z.string(),
motherName: z.string(),
motherOccupation: z.string(),
motherContactNo: z.string(),
});
const createLocalGuardianValidationSchema = z.object({
name: z.string(),
occupation: z.string(),
contactNo: z.string(),
address: z.string(),
});
export const createStudentValidationSchema = z.object({
body: z.object({
password: z.string().max(20),
student: z.object({
name: createUserNameValidationSchema,
gender: z.enum(['male', 'female', 'other']),
dateOfBirth: z.string().optional(),
email: z.string().email(),
contactNo: z.string(),
emergencyContactNo: z.string(),
bloogGroup: z.enum(['A+', 'A-', 'B+', 'B-', 'AB+', 'AB-', 'O+', 'O-']),
presentAddress: z.string(),
permanentAddress: z.string(),
guardian: createGuardianValidationSchema,
localGuardian: createLocalGuardianValidationSchema,
admissionSemester: z.string(),
profileImg: z.string(),
academicDepartment: z.string(),
}),
}),
});
const updateUserNameValidationSchema = z.object({
firstName: z.string().min(1).max(20).optional(),
middleName: z.string().optional(),
lastName: z.string().optional(),
});
const updateGuardianValidationSchema = z.object({
fatherName: z.string().optional(),
fatherOccupation: z.string().optional(),
fatherContactNo: z.string().optional(),
motherName: z.string().optional(),
motherOccupation: z.string().optional(),
motherContactNo: z.string().optional(),
});
const updateLocalGuardianValidationSchema = z.object({
name: z.string().optional(),
occupation: z.string().optional(),
contactNo: z.string().optional(),
address: z.string().optional(),
});
export const updateStudentValidationSchema = z.object({
body: z.object({
student: z.object({
name: updateUserNameValidationSchema,
gender: z.enum(['male', 'female', 'other']).optional(),
dateOfBirth: z.string().optional(),
email: z.string().email().optional(),
contactNo: z.string().optional(),
emergencyContactNo: z.string().optional(),
bloogGroup: z
.enum(['A+', 'A-', 'B+', 'B-', 'AB+', 'AB-', 'O+', 'O-'])
.optional(),
presentAddress: z.string().optional(),
permanentAddress: z.string().optional(),
guardian: updateGuardianValidationSchema.optional(),
localGuardian: updateLocalGuardianValidationSchema.optional(),
admissionSemester: z.string().optional(),
profileImg: z.string().optional(),
academicDepartment: z.string().optional(),
}),
}),
});
export const studentValidations = {
createStudentValidationSchema,
updateStudentValidationSchema,
};
```
- The same structure will be followed for all other modules.
- Then comes the routes folder that contains index.ts file that contains all the paths and route names and acts as a single point where all paths will be declared and it will be connected to the app.ts file. Its typical content will be as follows
```javascript
import { Router } from 'express';
import { AdminRoutes } from '../modules/Admin/admin.route';
import { AuthRoutes } from '../modules/Auth/auth.route';
import { CourseRoutes } from '../modules/Course/course.route';
import { FacultyRoutes } from '../modules/Faculty/faculty.route';
import { offeredCourseRoutes } from '../modules/OfferedCourse/OfferedCourse.route';
import { AcademicDepartmentRoutes } from '../modules/academicDepartment/academicDepartment.route';
import { AcademicFacultyRoutes } from '../modules/academicFaculty/academicFaculty.route';
import { AcademicSemesterRoutes } from '../modules/academicSemester/academicSemester.route';
import { semesterRegistrationRoutes } from '../modules/semesterRegistration/semesterRegistration.route';
import { StudentRoutes } from '../modules/student/student.route';
import { UserRoutes } from '../modules/user/user.route';
const router = Router();
const moduleRoutes = [
{
path: '/users',
route: UserRoutes,
},
{
path: '/students',
route: StudentRoutes,
},
{
path: '/faculties',
route: FacultyRoutes,
},
{
path: '/admins',
route: AdminRoutes,
},
{
path: '/academic-semesters',
route: AcademicSemesterRoutes,
},
{
path: '/academic-faculties',
route: AcademicFacultyRoutes,
},
{
path: '/academic-departments',
route: AcademicDepartmentRoutes,
},
{
path: '/courses',
route: CourseRoutes,
},
{
path: '/semester-registrations',
route: semesterRegistrationRoutes,
},
{
path: '/offered-courses',
route: offeredCourseRoutes,
},
{
path: '/auth',
route: AuthRoutes,
},
];
moduleRoutes.forEach((route) => router.use(route.path, route.route));
export default router;
```
- At last, we have a utils folder that contains various files related to utility functions. In our case, we have files for the utility function catchAsync and send response. The catchAsync.ts file is used for reducing the duplication of the try-catch block. Its content is as follows
```javascript
import { NextFunction, Request, RequestHandler, Response } from 'express';
const catchAsync = (fn: RequestHandler) => {
return (req: Request, res: Response, next: NextFunction) => {
Promise.resolve(fn(req, res, next)).catch((err) => next(err));
};
};
export default catchAsync;
```
- The sendResponse.ts file holds the response format for all routes. Its code is as follows:
```javascript
import { Response } from 'express';
type TResponse<T> = {
statusCode: number;
success: boolean;
message?: string;
data: T;
};
const sendResponse = <T>(res: Response, data: TResponse<T>) => {
res.status(data?.statusCode).json({
success: data.success,
message: data.message,
data: data.data,
});
};
export default sendResponse;
```
- There could be many other folders and files included in an industry grade. The files and folders mentioned in this blog are some that can be used in any project. | md_enayeturrahman_2560e3 |
1,884,090 | A Practical Guide to Achieving Six-Pack Abs for All Ages | The pursuit of defined abdominal muscles frequently appertained to as six-pack abs, is a... | 0 | 2024-06-11T07:22:09 | https://dev.to/fitness/a-practical-guide-to-achieving-six-pack-abs-for-all-ages-56p9 | webdev, javascript | The pursuit of defined abdominal muscles frequently appertained to as six-pack abs, is a garden-variety fitness thing for numerous individualities. While the conception of a twelve-pack may be interesting, it’s essential to extrapolate that achieving visible abs requires a combination of proper diet, harmonious exercise, and healthy life choices. This companion will explore how both grown-ps and youngish individualities, particularly 12- time- pasts, can work towards a strong and healthy core.
The quest for defined abdominal muscles, or "abs," is a common fitness goal. The idea of a 12- pack abs might sound charming, but it's important to extrapolate the materialities and myths girding this conception. This companion will address the possibility of achieving 12- pack abs, give a drill plan, and offer practical advice for achieving a six- pack, particularly for youngish individualities
Achieving a six-pack is a common goal for many fitness enthusiasts, including younger individuals. For 12-year-olds, developing a strong core and visible abs is possible through a combination of healthy eating, regular exercise, and lifestyle habits. This guide provides practical advice and a 12-week workout plan to help young people work towards their goal in a safe and healthy manner.
Understanding the Myth of 12-Pack Abs
First, it's important to address the idea of "12-pack abs." Anatomically, the rectus abdominis muscle, which forms the visible abs, is divided into segments by tendinous intersections. Most people can develop a six-pack, and some may naturally have an eight-pack due to genetic variations. The notion of a twelve-pack is more of a myth and marketing term rather than a realistic goal.
How to Achieve Six-Pack Abs
Diet and Nutrition:
· Balanced Diet: Focus on lean proteins, healthy fats, complex carbohydrates, and plenty of fruits and vegetables.
· Caloric Deficit: To reveal abs, you need to reduce body fat. This usually means consuming fewer calories than you burn.
· Hydration: Drink plenty of water to help with metabolism and muscle function.
Exercise Regimen:
· Cardio: Incorporate regular cardiovascular exercise such as running, cycling, or swimming to burn fat.
· Strength Training: Full-body workouts that include compound movements like squats, deadlifts, and bench presses build muscle and boost metabolism.
· Core Workouts: Specific exercises targeting the abs, such as planks, crunches, and leg raises, should be included.
Consistency and Patience:
· Regular Routine: Stick to your workout and diet plan consistently.
· Rest and Recovery: Allow your muscles time to recover with adequate sleep and rest days.
For 12-Year-Olds
Balanced Diet:
· Healthy Eating: Encourage a diet rich in whole foods, such as fruits, vegetables, lean proteins, and whole grains.
· Avoid Junk Food: Limit sugary snacks and fast food.
Physical Activity:
· Regular Exercise: Encourage participation in sports, dance, or other physical activities.
· Fun Workouts: Make exercise enjoyable with activities like swimming, biking, or playing soccer.
· Core Exercises: Simple exercises like planks, sit-ups, and bicycle crunches can be introduced in a fun and engaging way.
Healthy Habits:
· Active Lifestyle: Promote an active lifestyle with less screen time and more outdoor play.
· Proper Rest: Ensure they get adequate sleep for growth and recovery.
A Sample 12-Minute Six-Pack Workout
Here’s a quick and effective 12-minute workout that can be done at home:
Warm-Up (2 minutes):
· Jumping jacks
· High knees
Main Workout (8 minutes):
· Plank (1 minute): Hold a plank position, keeping your body straight and core tight.
· Bicycle Crunches (1 minute): Lie on your back and alternate bringing opposite elbows to knees.
· Russian Twists (1 minute): Sit with your legs bent, lean back slightly, and twist your torso side to side.
· Leg Raises (1 minute): Lie on your back and lift your legs straight up and down without touching the floor.
· Mountain Climbers (1 minute): In a plank position, alternate bringing your knees to your chest.
· Rest (30 seconds): Catch your breath.
· Repeat the Circuit (4 minutes): Go through the above exercises again.
Cool Down (2 minutes):
· Stretch your core and overall body with gentle movements.
Is It Possible to Get 12-Pack Abs?
· Understanding Abdominal Anatomy
The rectus abdominis muscle, which forms the visible "six-pack," is divided by tendinous intersections. Most people have the potential to develop a six-pack, and some may have an eight-pack due to genetic differences. The idea of a 12-pack is largely a myth, as it does not align with typical human anatomy. The appearance of multiple segments beyond eight is extremely rare and often exaggerated.
Can You Get a 12-Pack?
In reality, achieving a 12-pack as commonly portrayed is not feasible due to anatomical limitations. However, focusing on developing a strong and defined core is achievable and beneficial for overall health and fitness.
How to Achieve a Six-Pack
Diet and Nutrition:
· Balanced Diet: Emphasize lean proteins, healthy fats, complex carbohydrates, and plenty of fruits and vegetables.
· Caloric Deficit: To reveal abs, reducing body fat through a caloric deficit is essential.
· Hydration: Drink plenty of water to support metabolism and muscle function.
Exercise Regimen:
· Cardio: Regular cardiovascular exercise such as running, cycling, or swimming helps burn fat.
· Strength Training: Include compound movements like squats, deadlifts, and bench presses to build muscle and boost metabolism.
· Core Workouts: Target the abs with exercises such as planks, crunches, and leg raises.
Consistency and Patience:
· Regular Routine: Maintain a consistent workout and diet plan.
· Rest and Recovery: Ensure adequate sleep and rest days for muscle recovery.
For 12-Year-Olds
Balanced Diet:
· Healthy Eating: Encourage a diet rich in whole foods like fruits, vegetables, lean proteins, and whole grains.
· Limit Junk Food: Reduce consumption of sugary snacks and fast food.
Physical Activity:
· Regular Exercise: Promote participation in sports, dance, or other physical activities.
· Fun Workouts: Make exercise enjoyable with activities like swimming, biking, or playing soccer.
· Core Exercises: Introduce simple exercises like planks, sit-ups, and bicycle crunches in a fun way.
Healthy Habits:
· Active Lifestyle: Encourage an active lifestyle with less screen time and more outdoor play.
· Proper Rest: Ensure sufficient sleep for growth and recovery.
Sample 12-Week Plan for Achieving a Six-Pack
· Week 1-4: Building the Foundation
· Cardio: 20-30 minutes of moderate cardio (e.g., running, cycling) 3 times a week.
· Strength Training: Full-body workouts 3 times a week, focusing on compound movements.
· Core Workouts: Basic exercises like planks, crunches, and leg raises, 3 times a week.
· Week 5-8: Increasing Intensity
· Cardio: Increase to 30-40 minutes, incorporating intervals.
· Strength Training: Continue full-body workouts, adding more weight or resistance.
· Core Workouts: Add more advanced exercises like Russian twists and mountain climbers.
· Week 9-12: Maximizing Definition
· Cardio: 40-50 minutes with high-intensity intervals.
· Strength Training: Focus on muscle endurance and definition.
· Core Workouts: High-intensity core circuits, increasing frequency to 4 times a week.
Understanding the Basics
Key Principles
· Healthy Eating: Nutrition plays a critical role in developing abs. A balanced diet with plenty of whole foods is essential.
· Regular Exercise: Consistent physical activity that includes both cardio and strength training helps build muscle and reduce body fat.
· Rest and Recovery: Adequate sleep and rest are crucial for muscle growth and overall health.
· Safety First
· Consultation: Before starting any new exercise program, it’s important for 12-year-olds to consult with a healthcare provider or a fitness professional.
· Moderation: Avoid overtraining and ensure that workouts are age-appropriate to prevent injuries.
How to Get Six-Pack Abs for 12-Year-Olds
Healthy Eating Habits
1. Balanced Diet: Focus on whole foods like fruits, vegetables, lean proteins (chicken, fish, beans), whole grains (brown rice, oats), and healthy fats (nuts, seeds, avocado).
2. Limit Junk Food: Reduce the intake of sugary snacks, sodas, and fast food.
3. Hydration: Drink plenty of water throughout the day.
Regular Physical Activity
· Sports and Activities: Encourage participation in sports like soccer, basketball, swimming, or dance.
· Outdoor Play: Promote outdoor activities like biking, hiking, or playing tag with friends.
Core Exercises
Here are some age-appropriate core exercises for 12-year-olds:
· Planks: Hold the plank position for 20-30 seconds, gradually increasing the time.
· Sit-Ups: Perform sit-ups with proper form, focusing on using the core muscles.
· Bicycle Crunches: Lie on your back, alternate bringing opposite elbows to knees.
· Leg Raises: Lie on your back, lift your legs straight up and down without touching the floor.
· Russian Twists: Sit with legs bent, lean back slightly, and twist your torso side to side.
Lifestyle Habits
1. Active Lifestyle: Reduce screen time and encourage more physical activities.
2. Proper Sleep: Aim for 8-10 hours of sleep per night to support growth and recovery.
12-Week Plan for Achieving Six-Pack Abs
· Weeks 1-4: Building the Foundation
· Cardio: Engage in 20-30 minutes of moderate cardio (running, cycling, swimming) 3 times a week.
· Core Workouts: Perform basic core exercises like planks, sit-ups, and leg raises, 3 times a week.
· Strength Training: Include bodyweight exercises like push-ups, squats, and lunges, 2 times a week.
· Weeks 5-8: Increasing Intensity
· Cardio: Increase to 30-40 minutes, adding interval training for variety.
· Core Workouts: Add more advanced exercises such as bicycle crunches and Russian twists.
· Strength Training: Continue bodyweight exercises, adding more repetitions or sets.
· Weeks 9-12: Maximizing Definition
· Cardio: 40-50 minutes with high-intensity intervals.
· Core Workouts: High-intensity core circuits, including all previous exercises, 4 times a week.
· Strength Training: Focus on muscle endurance and overall fitness.
Sample Weekly Workout Plan
Monday:
· Cardio: 30 minutes
· Core: Planks, Sit-Ups, Leg Raises
Tuesday:
· Strength: Push-Ups, Squats, Lunges
Wednesday:
· Cardio: 30 minutes
· Core: Bicycle Crunches, Russian Twists
Thursday:
· Rest or Light Activity (walking, stretching)
Friday:
· Cardio: 30 minutes
· Core: Planks, Sit-Ups, Leg Raises
Saturday:
· Strength: Push-Ups, Squats, Lunges
Sunday:
· Rest or Light Activity (family activities, hiking)
Conclusion
Ringing up visible abs is a grueling thing that requires fidelity to an able-bodied life. For grown-ups, it involves a disciplined approach to diet and exercise. For 12-time- pasts, the focus should be on encouraging healthy habits and an active life. Flashback, thickness, and tolerance are crucial, and results will approach with time and trouble. Always consult with a healthcare provider or mr-fitness professional before starting any new fitness regimen, especially for younger individuals.
While the conception of 12-pack abs is an additional myth than reality, achieving a strong and delineated six-pack is a realistic and worthwhile thing. For grown-ups, it involves a disciplined passage to diet and exercise. For 12-time- pasts, the focus should be on erecting healthy habits and an active life. thickness, tolerance, and a balanced approach are crucial to supernova. Always consult with a healthcare provider or fitness professional before starting any new fitness regimen, especially for younger individuals.
Achieving a six-pack at the age of 12 is about building a strong foundation of healthy habits, balanced nutrition, and regular physical activity. The key is to maintain a fun and engaging routine that promotes overall health and fitness. Always prioritize safety and consult with a healthcare professional before starting any new exercise program. With consistency and patience, young individuals can work towards their fitness goals in a healthy and sustainable way.
| fitness |
1,884,089 | Vite - Code Splitting Strategy | The Problem Solved by Code Splitting Firstly, let's look at the problems with the... | 0 | 2024-06-11T07:21:06 | https://dev.to/markliu2013/vite-code-splitting-strategy-5a69 | vite | ## The Problem Solved by Code Splitting
Firstly, let's look at the problems with the traditional single chunk packaging mode:
1. Can not import on demand
All the code is bundled into one chunk, which means that the code needed for page initialization and the code for the route components are all bundled together.
2. Can not use network cache
Normally, the name of a chunk is generated based on the hash value of the file content. Therefore, every time the code is modified, the name of the chunk changes, which prevents the browser from using the local cache.
Code splitting is aimed at resolving these issues to enhance page load performance.
## Vite's Default Chunk Splitting Strategy
### Before version 2.9
- One chunk corresponds to one CSS file.
- Logic code will be packaged into one chunk.
- Third-party dependencies are packaged into one chunk.
### After version 2.9
The changed place is that both the third-party packages and the business code are now in one chunk.
If you want to control the code splitting strategy with a finer granularity, you need to use the [manualChunks](https://rollupjs.org/configuration-options/#output-manualchunks) configuration. The config is approximately as follows:
```ts
export default defineConfig({
build: {
rollupOptions: {
output: {
/**
* 1. Use in object form
* Package the lodash module into a chunk, named lodash
*/
manualChunks: {
lodash: ['lodash'],
},
/**
* 2. Use in function form
* Package all third-party packages into one chunk, named vendor
*/
manualChunks(id, { getModuleInfo, getModuleIds }) {
if (id.includes('node_modules')) {
return 'vendor';
}
},
},
},
},
});
``` | markliu2013 |
1,884,082 | Web Scraping With PowerShell | PowerShell is a command-line shell and scripting language that you can use to automate tasks, manage... | 0 | 2024-06-11T07:20:39 | https://dev.to/felipe_ishihara/web-scraping-with-powershell-1nad | windows, scraping, powershell, tutorial | PowerShell is a command-line shell and scripting language that you can use to automate tasks, manage systems, and perform several operations.
It has been the default shell for Windows since 2016, but unless you're a system or server administrator, chances are you've rarely used it. Most people don't realize how powerful it is.
But why PowerShell? Well, depends on your use case, but it's useful for quickly checking our APIs, without having to setup anything or change your project. You can also automate the execution of scripts to run them periodically.
I'm using PowerShell 5.1, but the examples below run on newer versions and PowerShell Core. If you want to upgrade it in Windows, please refer to [Microsoft's documentation](https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-windows?view=powershell-7.4).
If you’re not a Windows user, don’t worry! PowerShell is cross-platform, and you can check how to install it on [Linux](https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-linux?view=powershell-7.4) and [MacOS](https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-macos?view=powershell-7.4).
## The Basics of PowerShell
Here's PowerShell in a nutshell:
- In PowerShell, named commands are called `cmdlets` (pronounced _command-lets_).
- `cmdlets` follow a _Verb-Noun_ convention.
- Variables in PowerShell always start with a `$` like PHP.
- By convention, variables in PowerShell use PascalCase.
- Everything is an object in PowerShell.
For this tutorial we're going to use a single cmdlet: `Invoke-RestMethod`. This cmdlet sends a request to a REST API and returns an object formatted differently depending on the response.
To understand `Invoke-RestMethod` better, let's use two other cmdlets first:
- Invoke-WebRequest
- ConvertFrom-Json
`Invoke-WebRequest` is PowerShell's version of cURL. It makes a request and returns a response. And `ConvertFrom-Json` converts a JSON string into an object (or hash table for later versions of PowerShell).
## Using SerpApi
Let's use the URL in SerpApi's web page where it says "Easy integration" and pass it to PowerShell using the `-Uri` flag:
```bash
Invoke-WebRequest -Uri "https://serpapi.com/search.json?q=Coffee&location=Austin,+Texas,+United+States&hl=en&gl=us&google_domain=google.com&api_key=YOUR_API_KEY"
```
This will give us a response like this (with some of its content redacted for brevity):
```bash
StatusCode : 200
StatusDescription : OK
Content : {...}
RawContent : HTTP/1.1 200 OK
Connection: keep-alive
CF-Ray: 883ac74bedb8f655-NRT
CF-Cache-Status: EXPIRED
Vary: Accept-Encoding
referrer-policy: strict-origin-when-cross-origin
serpapi-search-id: 664350bfe93...
Forms : {}
Headers : {...}
Images : {}
InputFields : {}
Links : {}
ParsedHtml : System.__ComObject
RawContentLength : 48676
```
The JSON we actually want is inside the `Content` property. We could [pipe](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_pipelines?view=powershell-7.4) `Invoke-WebRequest` output into the `Select-Object` cmdlet to access `Content`, by using the `-ExpandProperty` flag with `Content` as the property we want to expand. Since everything is an object in PowerShell, we can also access `Content` by using dot notation:
```bash
# Getting Content with Select-Object
Invoke-WebRequest -Uri "https://serpapi.com/search.json?q=Coffee&location=Austin,+Texas,+United+States&hl=en&gl=us&google_domain=google.com&api_key=YOUR_API_KEY" | Select-Object -ExpandProperty Content
# Getting Content with dot notation
(Invoke-WebRequest -Uri "https://serpapi.com/search.json?q=Coffee&location=Austin,+Texas,+United+States&hl=en&gl=us&google_domain=google.com&api_key=YOUR_API_KEY").Content
```
Either way, we can now access the JSON we want:
```json
{
"search_metadata": {
"id": "664350bfe93ff45eb2993ec0",
"status": "Success",
"json_endpoint": "https://serpapi.com/searches/3bc827959d2dd083/664350bfe93ff45eb2993ec0.json",
"created_at": "2024-05-14 11:53:35 UTC",
"processed_at": "2024-05-14 11:53:35 UTC",
"google_url": "https://www.google.com/search?q=Coffee&oq=Coffee&uule=w+CAIQICIaQXVzdGluLFRleGFzLFVuaXRlZCBTdGF0ZXM&hl=en&gl=us&sourceid=chrome&ie=UTF-8",
"raw_html_file": "https://serpapi.com/searches/3bc827959d2dd083/664350bfe93ff45eb2993ec0.html",
"total_time_taken": 1.16
},
...
}
```
We can then pipe this into the `ConvertFrom-Json` cmdlet to convert the JSON string into an object we can use. To make it easier to access later, we'll assign everything to a variable. Here's how your command should look like:
```bash
$Json = Invoke-WebRequest -Uri "https://serpapi.com/search.json?q=Coffee&location=Austin,+Texas,+United+States&hl=en&gl=us&google_domain=google.com&api_key=YOUR_API_KEY" | Select-Object -ExpandProperty Content | ConvertFrom-Json
```
Now let's go back to `Invoke-RestMethod`. What it does is wrap everything we just did in a single command. Instead of running the command above, we could use:
```bash
$Json = Invoke-RestMethod -Uri "https://serpapi.com/search.json?q=Coffee&location=Austin,+Texas,+United+States&hl=en&gl=us&google_domain=google.com&api_key=YOUR_API_KEY"
```
Since we used a variable, there's no output this time. You can type the variable name and press `Enter` to have its entire content printed out to the console. You can also [redirect](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_redirection?view=powershell-7.4) the output to a file in its current working directory by using the `>` operator:
```bash
$Json > out.json
```
You can now see the JSON response inside the `out.json` file. If you're having encoding problems, consider using the [Out-File](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/out-file?view=powershell-7.4) cmdlet instead of the `>` operator. If you want to export it as a CSV instead, take a look at the [Export-CSV](https://learn.microsoft.com/en-gb/powershell/module/microsoft.powershell.utility/export-csv?view=powershell-7.4) cmdlet and combine it with the `>` operator.
We can access keys inside this `$Json` object by using dot notation like we did before when accessing the response `Content` property.
For example, `$Json.search_metadata` will return all the keys and values inside `search_metadata`, and `$Json.search_metadata.id` will return just the value `664350bfe93ff45eb2993ec0`.
For keys that have arrays as its value, you can use brackets notation to access specific elements inside the array.
For example, `$Json.organic_results` will return all 8 search results, while `$Json.organic_results[0]` will return the first one.
You can then use dot notation again to get a specific value from this specific organic result. For example, `$Json.organic_results[0].link` will return the first organic results' URL.
You can also use the snippet of code below instead of having everything inside a single line:
```bash
$Uri = "https://serpapi.com/search.json"
$Parameters = @{
q = "Coffee"
location = "Austin,+Texas,+United+States"
hl = "en"
gl = "us"
google_domain = "google.com"
api_key = "YOUR_API_KEY"
}
$Json = Invoke-RestMethod -Uri $Uri -Body $Parameters
```
Note: If you don’t want to keep opening the terminal every time, you can also save everything in a PowerShell script file. Just open a text file, paste the snippet of code, save and give it a `.ps1` extension. Now you can run it by double-clicking the file.
## Wrapping up
I hope this beginners tutorial was able to showcase some of PowerShell's capabilities. It's pretty much a full-fledged programming language, so this is just a small taste of its power. You can use PowerShell to do everything something like Python can do.
While this isn’t an in-depth tutorial, if you want to parse the HTML directly, you could combine `Invoke-WebRequest` with the [PSParseHTML](https://github.com/EvotecIT/PSParseHTML) module or [AngleSharp](https://github.com/AngleSharp/AngleSharp) .NET libraries. With this, you can scrape data from web pages, not just the search results we provide.
Feel free to access our [Google Search Engine Results API](https://serpapi.com/search-api) and modify the parameters to test our API, and don't forget to [sign up](https://serpapi.com/users/sign_up) for a free account to get 100 credits/month if you haven't already. That's plenty for testing and simple task automation.
If you have any questions or concerns, feel free to contact our team at <u>contact@serpapi.com</u>!
## Learn more about PowerShell
- [Microsoft Learn: Introduction to PowerShell](https://learn.microsoft.com/en-us/training/modules/introduction-to-powershell/)
- [PowerShell Documentation](https://learn.microsoft.com/en-gb/powershell/)
- [Weekend Scripter: The Best Ways to Learn PowerShell](https://devblogs.microsoft.com/scripting/weekend-scripter-the-best-ways-to-learn-powershell/)
- [Invoke-WebRequest](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/invoke-webrequest?view=powershell-7.4)
- [ConvertFrom-Json](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/convertfrom-json?view=powershell-7.4)
- [Select-Object](https://learn.microsoft.com/en-us/powershell/module/Microsoft.PowerShell.Utility/Select-Object?view=powershell-7.4)
- [Invoke-RestMethod](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/invoke-restmethod?view=powershell-7.4) | felipe_ishihara |
1,884,075 | The Bitcoin Block Size War: Vitalik Buterin’s Perspective | The Bitcoin block size war has become one of the most important discussions in the cryptocurrency... | 0 | 2024-06-11T07:20:36 | https://36crypto.com/the-bitcoin-block-size-war-vitalik-buterins-perspective/ | cryptocurrency, news | The Bitcoin block size war has become one of the most important discussions in the cryptocurrency community and remains relevant to this day. In particular, the dispute highlights fundamental questions about scalability, decentralization, and the very future of the digital asset. And recently, Ethereum founder Vitalik Buterin delved into this controversial war over the size of the Bitcoin block in his [blog](https://vitalik.eth.limo/general/2024/05/31/blocksize.html).
**Buterin Overview of Different Views**
Buterin decided to revisit this controversy after recently reading two historical books that cover the issue from opposing sides. The first book, “The Blocksize War” by Jonathan Bier, tells the story from the perspective of small block supporters, and the second, “Hijacking Bitcoin” by Roger Ver and Steve Patterson, is from the perspective of big block supporters.
The essence of the differences between small and big blockers was in their management philosophy and technical priorities. The small ones valued ease of node management and support for decentralization, believing that Bitcoin should remain accessible to ordinary users. They feared that large players could dominate the network, jeopardizing its decentralized principle.
At the same time, big blockers prioritized lower transaction fees and scalability, arguing that larger blocks would keep Bitcoin affordable for users and prevent reliance on centralized layer-2 solutions.
Vitalik Buterin openly admits that he initially favored “big blockers” because of concerns about high fees and the untested nature of layer-2 solutions. The expert criticizes those in favor of small blocks for not defining a clear consensus mechanism for significant changes. Buterin emphasizes that they prefer to maintain the status quo, which is in line with their conservative views on development.
_“I found myself agreeing with Ver more often on big-picture questions, but with Bier more often on individual details. In my view, big blockers were right on the central question that blocks needed to be bigger, and that it was best to accomplish this with a clean simple hard fork like Satoshi described, but small blockers committed far fewer embarrassing technical faux pas, and had fewer positions that led to absurd outcomes if you tried to take them to their logical conclusion,”_ Buterin [said](https://vitalik.eth.limo/general/2024/05/31/blocksize.html).
The expert notes that both sides have failed to integrate innovative technologies that could solve scalability and security issues. He emphasizes the potential of [ZK-SNARK](https://blog.whitebit.com/en/what-is-zero-knowledge-proof-in-blockchain/) and other advanced cryptographic methods to improve scalability and privacy, which were ignored during the fight over block size.
**Open Source as a Key to Equitable Finance**
Solana co-founder Anatoly Yakovenko recently made a compelling case for the company’s ability to change equity in finance. Responding to Buterin’s thoughts, he emphasizes Solana’s approach. Yakovenko explains that the approach is not about competing with existing currencies, but about making financial systems more accessible and fair through the use of blockchain technology.
Unlike Buterin, Solana’s co-founder believes that low latency and high bandwidth can simplify access to financial services. _“Fairness in finance is all about who can access information first and who can act on it,”_ Yakovenko [notes](https://x.com/aeyakovenko/status/1796965266896900443).
According to him, Solana’s technology uses the most affordable hardware to push the boundaries of decentralized systems, potentially eliminating many of the inequities in traditional finance.
Raj Gokal, another co-founder of Solana, [entered](https://x.com/rajgokal/status/1784120679174156572) the discussion by emphasizing the unconventional but key role meme coins play in attracting a diverse user base. He also emphasized the community’s mixed attitude towards meme coins, suggesting that while some consider them a distraction, others see them as vital to the growth and development of the blockchain space.
_“Meme coins are scaring away serious builders,”_ Gokal noted, urging the community to recognize the broader impact of these projects behind their often frivolous appearance.
**Summary**
The Bitcoin block size debate raises fundamental questions of scalability and decentralization, and new thoughts and ideas on the topic continue to add to it. Vitalik Buterin and his perspective on the issue analyzes both sides of the debate and demonstrates their strengths and weaknesses. He also emphasizes the importance of innovations such as ZK-SNARK in overcoming scalability and security issues that were missed during the historical debate. At the same time, Anatoliy Yakovenko adds his thoughts to the discussion, emphasizing the need for accessibility and fairness in financial systems. Such disputes over Bitcoin block size demonstrate not only technological challenges but also divergent views on the future of cryptocurrencies. | hryniv_vlad |
1,884,046 | Skin Specialist Pune | Skin and Scalps, founded in 2019 by Dr. Sohana Sharma and her family, is now well-known for providing... | 0 | 2024-06-11T07:19:49 | https://dev.to/skinandscalps_clinic/skin-specialist-pune-241h | skin, skinspecialsit, skincare | Skin and Scalps, founded in 2019 by Dr. Sohana Sharma and her family, is now well-known for providing high-quality services.
Dr. Sohana Sharma is a well-regarded dermatologist and skin expert. Known for being one of the best skin specialist Pune.
Skin and Scalps is a fast expanding medical, surgical, and cosmetic dermatology clinic. Skin and Scalps Clinic’s doctors are highly skilled, experienced, and completely devoted to meeting the highest quality and service standards.
If you’re seeking a skin specialist in Pune and are concerned about your skin, look no further. Consider visiting Skin & Scalps today. Dr. Sohana treats both men’s and women’s skin problems. She also provides acne, pigmentation, cellulite, and hair loss treatments.
Our primary goal is to enhance the health of your skin, which we accomplish by tailoring your treatment to your specific skin challenges and needs. We treat patients of all ages at Skin & Scalps Clinic. Our dermatologists have extensive expertise diagnosing and treating acne, eczema, psoriasis, rosacea, leg ulcers, skin cancer, skin lumps (warts, moles, and skin tags), as well as hair and nail disorders in children and adults.
Treatments are carried out in our clinic to properly address your problems, based on your concerns and treatment goals. Your at-home tailored regimen is critical in maintaining and preserving your skin in between clinic visits.
Our skin is constantly subjected to environmental factors. An active focused skincare program can assist to reduce and restore these negative effects, as well as protect your skin.
From UV light from the sun to cold, dry weather to pollution, dust, and chemicals, all of these factors contribute to aging. Nevertheless, today’s fast-paced lifestyle, poor eating habits, smoking, hormonal shifts, restless nights, and stress all have an impact on the skin. Because your skin is unique, all treatments at Skin & Scalps are tailored and customized just for you.
Our team combines the knowledge, expertise, and equipment required to execute a wide range of surgical and medicinal dermatological treatments. Among some of the conditions we address are:
Acne, Scarring
Rosacea
Age Spots
Autominue disorders
Dermatitis
Eczema
Genetic disorders
Moles
Psoriasis
Skin Infections
Skin Allergies
Sun-damaged skin
It is well accepted that the professional entrusted with the maintenance of your skin must have two primary characteristics: enthusiasm and experience.
Dr. Sohana has these characteristics in excess; with years of knowledge and an unrivaled passion for skincare, she is indeed the definitive skin expert.
Dr. Sohana has the expertise with many skin types, but no one’s skin is ever genuinely the same, which is why she integrates her knowledge, experience, and dedication into an entirely unique treatment experience within the clinic for each patient.
If you’re looking for a skin specialist Pune, worried about your skin? Dr. Sohana takes care of the skin issues of both men and women. She also offers treatments for acne, pigmentation, cellulite, and hair loss. | skinandscalps_clinic |
1,884,045 | PHP 8.1 ile Gelen Enum'lar: Kodunuzu Daha Güvenli ve Anlaşılır Hale Getirin | PHP 8.1'in tanıtılmasıyla birlikte birçok yeni özellik ve iyileştirme geldi. Bu özelliklerden biri de... | 0 | 2024-06-11T07:19:19 | https://dev.to/baris/php-81-ile-gelen-enumlar-kodunuzu-daha-guvenli-ve-anlasilir-hale-getirin-3g44 | PHP 8.1'in tanıtılmasıyla birlikte birçok yeni özellik ve iyileştirme geldi. Bu özelliklerden biri de `enum`'lar. Bu yazıda, enum'ların ne olduğunu, PHP'de nasıl kullanıldığını ve yazılım geliştirme sürecinizde neden bu kadar önemli olduklarını detaylı bir şekilde inceleyeceğiz.
#### Enum Nedir?
Enum (enumeration), belirli bir sabit değerler kümesini tanımlayan bir veri türüdür. Enum'lar, özellikle bir değişkenin belirli, sabit bir grup değerden birini alması gerektiğinde kullanılır. Bu, kodun okunabilirliğini ve bakımını kolaylaştırır ve hataları azaltır.
#### PHP'de Enum'lar
PHP 8.1 ile birlikte gelen enum'lar, aşağıdaki şekilde tanımlanabilir:
```php
<?php
enum Status {
case Pending;
case Approved;
case Rejected;
}
// Kullanım
$status = Status::Pending;
if ($status === Status::Approved) {
echo "Status is approved.";
}
?>
```
#### Enum'ların Temel Amacı Nedir?
Enum'ların temel amacı, belirli bir grup değeri daha güvenli ve anlaşılır bir şekilde yönetmektir. Bu, kodun okunabilirliğini ve bakımını kolaylaştırır ve hataları azaltır. Özellikle belirli bir değişkenin sadece belirli değerler alması gerektiğinde kullanışlıdır.
#### Enum Kullanım Senaryoları
1. **Durum Yönetimi:** Sipariş durumları, kullanıcı hesap durumları gibi.
2. **Hata Kodları:** Belirli hata türlerini tanımlamak için.
3. **Rol Yönetimi:** Kullanıcı rolleri (Admin, User, Guest) gibi.
4. **Ödeme Yöntemleri:** Kredi kartı, banka havalesi, PayPal gibi ödeme yöntemlerini tanımlamak için.
#### Enum Tanımlamadığımızda Olabilecek Problemler
Enum'lar kullanılmadığında, belirli bir grup sabit değeri yönetmek için genellikle sabitler veya stringler kullanılır. Bu, aşağıdaki problemlere yol açabilir:
1. **Hata Yapma Riski:** Bir string ya da sabit yanlış yazıldığında (örneğin, 'approved' yerine 'aproved'), hata ayıklamak zor olabilir.
2. **Kod Okunabilirliği:** Sabitler veya stringler kullanıldığında, kodun okunabilirliği ve anlaşılabilirliği azalabilir.
3. **Bakım Zorluğu:** Değerlerde bir değişiklik gerektiğinde (örneğin, 'pending' yerine 'awaiting'), tüm kod tabanını güncellemek zor olabilir.
#### PHP'de Enum İle İlgili İleri Düzey Özellikler
PHP'de enum'lar, sadece sabit değerlerin bir koleksiyonunu tanımlamakla kalmaz, aynı zamanda enum sınıflarına metotlar da ekleyebilirsiniz:
```php
<?php
enum Status {
case Pending;
case Approved;
case Rejected;
public function getLabel(): string {
return match($this) {
self::Pending => 'Pending',
self::Approved => 'Approved',
self::Rejected => 'Rejected',
};
}
}
// Kullanım
$status = Status::Pending;
echo $status->getLabel(); // Output: Pending
?>
```
#### Enum'ların Avantajları
- **Güvenlik:** Hataları ve yanlış değerleri önler.
- **Okunabilirlik:** Kodun daha anlaşılır ve okunabilir olmasını sağlar.
- **Bakım Kolaylığı:** Değerlerin yönetimini ve güncellenmesini kolaylaştırır.
- **Tutarlılık:** Değerlerin tutarlı bir şekilde kullanılmasını sağlar.
### Özetleyelim
PHP 8.1 ile birlikte gelen enum'lar, kodunuzun güvenliğini, okunabilirliğini ve bakımını büyük ölçüde artırır. Belirli sabit değerlerin kullanıldığı her yerde enum'ları tercih ederek kodunuzu daha sağlam ve anlaşılır hale getirebilirsiniz. Özellikle durum yönetimi, hata kodları ve rol yönetimi gibi alanlarda enum'ların gücünden faydalanmak, yazılım geliştirme sürecinizi daha verimli hale getirecektir.
| baris | |
1,884,044 | Will AI Replace Developers? Examining the Future of Software Development | The rapid advancement of artificial intelligence (AI) has sparked considerable debate about its... | 0 | 2024-06-11T07:17:04 | https://dev.to/jottyjohn/will-ai-replace-developers-examining-the-future-of-software-development-49cn | ai, softwaredevelopment, developers |
The rapid advancement of artificial intelligence (AI) has sparked considerable debate about its potential to transform various professions, including software development. With AI's growing capabilities in automating tasks, generating code, and even creating entire applications, many wonder whether it will eventually replace human developers. To understand the implications, we need to explore AI's current role in development, its limitations, and the value human developers bring to the table.
**The Current Role of AI in Development**
AI has already made significant contributions to the software development process, enhancing efficiency and productivity in several ways:
- Code Generation and Auto-completion:
AI-powered tools like GitHub Copilot can suggest code snippets, complete lines of code, and even generate entire functions based on the developer's context. This reduces repetitive tasks and accelerates the coding process.
- Bug Detection and Fixing:
AI-driven tools such as DeepCode and SonarQube can analyze code to identify bugs, suggest fixes, and sometimes automatically correct errors. These tools improve code quality and reduce the time spent on debugging.
- Automated Testing:
AI can generate test cases, execute them, and analyze the results, ensuring more comprehensive testing coverage and faster feedback loops. Tools like Testim leverage AI to streamline testing processes.
- Natural Language Processing (NLP):
AI models can understand and process human language, enabling developers to interact with code repositories using natural language queries. This enhances the usability and accessibility of development tools.
**Limitations of AI in Development**
Despite its impressive capabilities, AI has limitations that prevent it from fully replacing human developers:
- Creativity and Innovation:
Software development often requires creative problem-solving and innovative thinking, areas where AI still falls short. AI can assist with routine tasks but struggles with novel and complex challenges.
- Context Understanding:
AI lacks a deep understanding of the broader context in which a project operates. Human developers possess domain knowledge and contextual awareness that AI cannot replicate.
- Ethical and Social Considerations:
Developing software involves making ethical and social decisions that require human judgment. AI cannot adequately address these considerations, which are critical in many projects.
- Collaborative and Interpersonal Skills:
Successful software development relies on collaboration and communication within teams and with stakeholders. Human developers bring interpersonal skills that AI cannot match.
**The Value of Human Developers**
While AI can automate and enhance certain aspects of development, human developers bring irreplaceable value to the field:
- Innovation and Vision:
Developers drive innovation, envisioning and creating new technologies and solutions that AI cannot independently conceive.
- Critical Thinking and Adaptability:
Developers excel at critical thinking and adapting to changing requirements, ensuring that software meets evolving needs and expectations.
- Ethical Judgment:
Human developers consider the ethical implications of their work, making decisions that align with societal values and norms.
- Collaboration and Leadership:
Developers foster collaboration, lead teams, and mentor junior developers, cultivating a productive and supportive development environment.
To conclude, while AI is transforming software development by automating routine tasks and enhancing productivity, it is unlikely to replace human developers entirely. Instead, AI will continue to serve as a powerful tool that augments the capabilities of developers, enabling them to focus on more creative, complex, and meaningful aspects of their work. The future of software development will likely see a symbiotic relationship between AI and human developers, where both complement each other's strengths to drive innovation and build better software. | jottyjohn |
1,884,043 | Modern NextJS Portfolio | In this video, we'll walk you through building a modern and eye-catching portfolio website using... | 0 | 2024-06-11T07:16:53 | https://dev.to/tony_xhepa_30ccaae4237e4a/modern-nextjs-portfolio-308n | react, nextjs, tailwindcss, portfolio | {% embed https://youtu.be/5_tLD6YKjOs %}
In this video, we'll walk you through building a modern and eye-catching portfolio website using Next.js. We'll leverage the power of Next.js for a performant and SEO-friendly foundation, and then add some flair with animations using a popular library like Framer Motion.
Here's what you'll learn:
Setting up a Next.js project for your portfolio
Building a clean and responsive layout
Integrating smooth animations for a captivating user experience
Highlighting your skills and experience in a professional way
(Optional) Deploying your portfolio website to the web
By the end of this video, you'll have a stunning and interactive portfolio that showcases your development expertise!
This video is perfect for:
Developers looking to build a modern portfolio
Anyone who wants to learn Next.js and Framer Motion
Designers who want to add animations to their web projects
Leave a comment below and let us know what kind of animations you'd like to see in your portfolio!
GitHub: https://github.com/codewithtonyofficial/nextjs-portfolio-with-aos | tony_xhepa_30ccaae4237e4a |
1,884,041 | #2 PHP’de Final Sınıflar ve Readonly Sınıflar: Readonly Class | Readonly sınıflar, PHP 8.2 ile birlikte tanıtılan bir özelliktir. Readonly sınıflar, sınıfın tüm... | 0 | 2024-06-11T07:15:59 | https://dev.to/baris/2-phpde-final-siniflar-ve-readonly-siniflar-readonly-class-1ci6 | Readonly sınıflar, PHP 8.2 ile birlikte tanıtılan bir özelliktir. Readonly sınıflar, sınıfın tüm özelliklerinin (properties) yalnızca okunabilir olduğu ve yalnızca sınıfın oluşturulması (instantiation) sırasında atanabileceği anlamına gelir. Bu sınıflar, veri tutarlılığını sağlamak ve nesnelerin durumlarının değiştirilmesini önlemek için kullanılır.
### Readonly Sınıflar Nedir?
Readonly sınıflar, tüm özelliklerin `readonly` olduğu sınıflardır. Bu, sınıfın tüm özelliklerinin sadece okunabilir olduğu ve oluşturulduktan sonra değiştirilemeyeceği anlamına gelir.
### Readonly Sınıf Tanımlaması
Readonly sınıflar şu şekilde tanımlanır:
```php
<?php
readonly class Point {
public function __construct(
public int $x,
public int $y,
) {}
}
$point = new Point(10, 20);
// Özelliklere atama yapılabilir:
echo $point->x; // 10
echo $point->y; // 20
// Ancak özellikler değiştirilemez:
$point->x = 30; // Hata: Cannot modify readonly property Point::$x
?>
```
### Neden Readonly Sınıflara İhtiyaç Duyarız?
1. **Veri Tutarlılığı:** Readonly sınıflar, bir nesnenin durumunun değişmesini önleyerek veri tutarlılığını sağlar. Bu, özellikle kritik sistemlerde ve önemli verilerin manipülasyonunun istenmediği durumlarda önemlidir.
2. **Güvenlik:** Readonly sınıflar, nesnelerin durumunun değiştirilememesi gereken durumlarda güvenliği artırır. Bu, hatalı veya kötü niyetli kodun veri üzerinde değişiklik yapmasını önler.
3. **Kolay Anlaşılabilirlik:** Readonly sınıflar, sınıfın kullanımını daha anlaşılır hale getirir. Bir sınıfın tüm özelliklerinin yalnızca okunabilir olduğunu bilmek, kodun nasıl çalıştığını anlamayı kolaylaştırır.
4. **Yan Etkiyi Azaltma:** Nesnelerin durumunun değiştirilememesi, yan etkileri azaltır ve kodun daha tahmin edilebilir olmasını sağlar. Bu, özellikle fonksiyonel programlamada ve yan etkilerin minimumda tutulması gereken durumlarda faydalıdır.
### Örnek Kullanım Senaryoları
1. **Koordinatlar veya Noktalar:** Coğrafi koordinatlar gibi değişmemesi gereken verileri tutmak için kullanılabilir.
2. **Konfigürasyon Verileri:** Uygulamanın çalışma süresince değişmemesi gereken konfigürasyon ayarlarını tutmak için kullanılabilir.
3. **Kimlik Bilgileri:** Kullanıcı kimlik bilgileri gibi, değiştirilemez olması gereken verileri saklamak için kullanılabilir.
### Readonly Sınıfların Alternatifleri
Readonly sınıflar kullanılmadan önce, benzer işlevselliği sağlamak için getter metotları ve özel setter metotları kullanılırdı. Ancak bu yöntemler, readonly sınıflar kadar doğrudan ve anlaşılır değildir.
```php
<?php
class Point {
private int $x;
private int $y;
public function __construct(int $x, int $y) {
$this->x = $x;
$this->y = $y;
}
public function getX(): int {
return $this->x;
}
public function getY(): int {
return $this->y;
}
}
$point = new Point(10, 20);
// Özelliklere atama yapılabilir:
echo $point->getX(); // 10
echo $point->getY(); // 20
// Ancak özellikler değiştirilemez:
$point->x = 30; // Hata: Cannot access private property Point::$x
?>
``` | baris | |
1,884,040 | #1 PHP’de Final Sınıflar ve Readonly Sınıflar: Final Class | Final Sınıflar Nedir? Final sınıflar, başka bir sınıf tarafından kalıtılamayan... | 0 | 2024-06-11T07:14:52 | https://dev.to/baris/1-phpde-final-siniflar-ve-readonly-siniflar-final-class-2m4o | ### Final Sınıflar Nedir?
Final sınıflar, başka bir sınıf tarafından kalıtılamayan (inheritance) sınıflardır. Bir sınıfı final olarak tanımlamak, o sınıfın alt sınıflarının oluşturulmasını engeller. PHP'de bir sınıfı `final` anahtar kelimesiyle tanımlayarak bu sınırlamayı getirebilirsiniz.
### Final Sınıf Tanımlaması
Final sınıflar şu şekilde tanımlanır:
```php
<?php
final class FinalClass {
public function sayHello() {
echo "Hello from FinalClass!";
}
}
// Hata: FinalClass'tan türetilemez
class AnotherClass extends FinalClass {
}
$finalClass = new FinalClass();
$finalClass->sayHello(); // "Hello from FinalClass!"
?>
```
### Neden Final Sınıflara İhtiyaç Duyarız?
1. **Tasarımın Korunması:** Final sınıflar, bir sınıfın tasarımının korunmasını sağlar. Sınıfın davranışının değiştirilmesini veya genişletilmesini istemediğiniz durumlarda kullanılır.
2. **Güvenlik:** Özellikle güvenlik açısından kritik sınıfların veya hassas işlevlerin değiştirilememesi gerektiğinde kullanılır.
3. **Performans:** PHP'de final sınıflar, JVM (Java Virtual Machine) gibi dillerde olduğu kadar belirgin olmasa da, performans iyileştirmeleri sağlayabilir. Derleyici, final sınıfların kalıtılmayacağını bilerek optimizasyon yapabilir.
### Örnek Kullanım Senaryoları
1. **Utility Sınıflar:** Helper veya utility fonksiyonları içeren sınıflar genellikle final olarak tanımlanır çünkü bu sınıfların kalıtılması genellikle mantıklı değildir.
2. **Singleton Deseni:** Singleton tasarım deseninde kullanılan sınıfın yalnızca bir kez örneklenmesini ve kalıtılmasını önlemek için final olarak tanımlanır.
3. **Güvenlik Katmanları:** Belirli bir güvenlik politikası uygulayan sınıflar, bu politikaların değiştirilememesi için final olarak tanımlanabilir.
### Final Metotlar
Ayrıca, sınıfın kendisi olmasa da, belirli metotları `final` olarak tanımlayabilirsiniz. Bu, metodun alt sınıflar tarafından geçersiz kılınmasını (override) engeller.
```php
<?php
class BaseClass {
public final function sayHello() {
echo "Hello from BaseClass!";
}
}
class DerivedClass extends BaseClass {
// Hata: final method BaseClass::sayHello cannot be overridden
public function sayHello() {
echo "Hello from DerivedClass!";
}
}
$baseClass = new BaseClass();
$baseClass->sayHello(); // "Hello from BaseClass!"
?>
``` | baris | |
1,884,039 | Top 5 Reasons to Pick React for Frontend Web Development | React is an open-source, front-end JavaScript library developed by Facebook. Created to build dynamic... | 0 | 2024-06-11T07:14:17 | https://dev.to/nicholaswinst14/top-5-reasons-to-pick-react-for-frontend-web-development-b1d | react, frontend, webdev, javascript | React is an open-source, front-end JavaScript library developed by Facebook. Created to build dynamic and responsive user interfaces, React quickly gained popularity among developers and businesses due to its several advantages over competitors. Since its release in 2013, it has made a tremendous impact on modern web development. It has become one of the most popular tools for web application development.
Several key factors are driving React’s widespread adoption and enduring popularity. Several benefits are aiding React's popularity, from component-based architecture, the Virtual DOM, the strong community and ecosystem to the backing of major companies, including Facebook, and its flexibility and integration capabilities. By understanding these factors, businesses can better appreciate why React has become a default choice of modern web development and whether React.js development services meet their requirements.
## **5 Key Factors Driving React's Popularity**
React.js is not the only popular Javascript in the market. Two popular web development frameworks that utilize JavaScript include Node.js and React.js. However, React’s popularity among [front-end developers](https://www.capitalnumbers.com/front-end-development.php?utm_source=Devto&utm_medium=cngblog&utm_id=gp0624dev) has been rising lately, almost close to Node.js, leading for now. This is mainly due to its intuitive features and powerful capabilities. So, what exactly makes React such a game-changer?
Let’s examine the five key factors driving React's dominance to understand why developers worldwide are adopting it.
### **- Component-Based Architecture**
One of the biggest reasons behind React’s popularity is its component-based architecture. It is a design approach where a web application uses modular, self-contained components. Each component represents a specific user interface part, such as a button, form, or navigation bar. These individual parts encapsulate their own logic, rendering, and state management. These components work independently, meaning they can be developed, tested, and maintained separately from the rest of the application.
One of the fundamental principles of this architecture is reusability. This means that once a component is created, it can be reused across different parts of the application or even in other projects, promoting consistency and efficiency. The component-based architecture offers several other advantages. The most evident is the enhanced code reusability and maintainability. This is possible since components are modular and self-contained; they can be easily reused, reducing duplication. It also ensures that updates to a component are reflected throughout the application without redundant coding efforts.
Secondly, debugging and testing are simplified. Isolated components allow React.js developers to test individual application parts in isolation, making identifying and fixing issues easier. Finally, this architecture enables the ease of scaling applications. As projects become complex, the modular nature of components allows for adding new features. It can be added by integrating new components without overhauling the entire codebase, streamlining the development process, and supporting efficient project scalability.
### **- Virtual DOM**
The Virtual DOM (Document Object Model) is a programming concept where a virtual user interface representation is kept in memory and synced with the real DOM by a library such as React. Unlike the traditional DOM, which updates the entire UI whenever a change, the Virtual DOM allows React to update only the changed parts. This efficient update process involves creating a lightweight copy of the actual DOM, making changes to the virtual version, and then applying only the necessary updates to the real DOM.
The Virtual DOM enhances performance by minimizing direct manipulation of the real DOM, which is often slow and resource-intensive. By updating only the changed elements rather than the whole DOM, the Virtual DOM reduces the number of reflows and repaints required, leading to faster rendering and a more responsive user experience. Thus, [interactive UI design](https://dev.to/nicholaswinst14/front-end-development-making-intelligence-visible-by-design-4mj) with React is hassle-free due to virtual DOM. It makes updating changes throughout the system efficient and easy compared to other popular frameworks/libraries. For example, in applications with complex UIs or high-frequency updates, the Virtual DOM ensures smoother interactions and quicker load times, providing a better overall performance.
React uses the Virtual DOM to achieve efficient rendering through a reconciliation process. When the state of a component changes, React updates the Virtual DOM first. It then compares this updated Virtual DOM with the previous version to identify the differences. Only the changed elements are updated in the real DOM, which optimizes rendering performance. The Virtual DOM provides advantages in various scenarios, where quick and efficient updates are crucial for maintaining a seamless user experience. This includes dynamic data dashboards, real-time collaborative tools, and interactive user interface designs, making a wide range of applications possible.
### **- Backing by Facebook and Major Companies**
As the original creator and primary maintainer of React, Facebook’s continuous support and development of React have greatly impacted its growth and credibility in the developer community. Facebook ensures that the library is regularly updated, well-documented, and supported with extensive resources. This backing from a major tech company instills trust and confidence among React.js developers and businesses, knowing that React is built and maintained by one of the industry’s leading technology firms. Facebook’s active involvement in React’s development guarantees that the library evolves with cutting-edge features and adheres to high performance and security standards as technology evolves.
The adoption of React by other major companies further reinforces its reliability and effectiveness. Leading organizations like Instagram, Airbnb, and Netflix use React to build dynamic and interactive user interface designs. For instance, Instagram uses React to provide a seamless and responsive user experience, while Airbnb maintains consistency and efficiency across its platform. Netflix utilizes React to deliver fast and engaging streaming services.
These prominent companies' widespread adoption of React drives further trust and development within the React ecosystem. This corporate adoption enhances React’s reputation and contributes to a vibrant community that continuously innovates and supports the framework. It also encourages developers and businesses to adopt and invest in React for their web development projects.
### **- Flexibility and Integration**
React is known for its flexibility and ability to integrate seamlessly with other libraries and frameworks. This interoperability allows React.js developers to enhance their projects with additional functionalities without being locked into a single technology stack. For instance, React can be easily combined with Node.js for server-side rendering. This provides a full-stack JavaScript solution that improves performance and user experience.
Similarly, integrating React with GraphQL or RESTful APIs allows efficient data querying and management, optimizing how applications fetch and update data. This flexibility makes React a versatile choice for diverse projects, from simple web applications to complex single-page applications (SPAs). This ability to tailor the tech stack to specific needs unlocks innovative use cases. For instance, it enables building a [headless WordPress](https://www.soup.io/headless-wordpress-pioneering-the-future-of-web-development) website with React. This approach allows utilizing React's component-based architecture to build dynamic and interactive user interfaces while benefiting from WordPress's content management capabilities.
Moreover, React Native or React.js extends its capabilities to mobile app development. It allows React.js developers to build native mobile applications for iOS and Android using the same principles and components as React for web development. This approach provides significant benefits, including the ability to share a substantial portion of the codebase between web and mobile platforms, reducing development time and effort.
By using React Native, developers can create high-performance mobile applications with a native look and feel while maintaining the efficiency and simplicity of React’s component-based architecture. This unified development experience enhances productivity and ensures consistency across different platforms, making React a powerful tool for web and mobile development.
Further, the combination of React and Next.js has contributed to React's popularity due to its exceptional flexibility and seamless integration capabilities. Next.js enhances React by offering server-side rendering and static site generation, which improve performance and SEO, making it an ideal choice for dynamic and high-performance web applications.
### - **Strong Community and Ecosystem**
The React community is large, highly active, and deeply engaged. It contributes to the framework's ongoing development and the broader ecosystem. This vibrant community includes React.js developers, companies, and enthusiasts who continually create, share and improve tools, libraries, and best practices. The developers’ community's active participation in forums, conferences, and online platforms fosters a collaborative environment where knowledge and resources are freely exchanged. Their collective efforts ensure that React remains cutting-edge and responsive to the changing needs of developers worldwide.
The React ecosystem has tools and libraries that complement and enhance development. Popular tools like Redux for state management and React Router for routing in single-page applications are integral to many React projects. These tools streamline development processes, making it easier to manage complex applications. Such tools, developed and maintained by the developers' community, extend the capabilities of React and simplify common development tasks, enhancing overall productivity and project quality. Official documentation is comprehensive and regularly updated, providing clear guidance on using React’s features and best practices.
Additionally, numerous tutorials, online courses, and articles created by community members offer practical insights and help developers at all skill levels. This wealth of resources ensures that beginners and experienced developers can quickly learn, troubleshoot, and innovate using React, contributing to its widespread adoption and continued success. However, it can still be tricky to execute and utilize the various tools to their potential without the expertise. Businesses with more sophisticated and niche requirements can outsource [React.js development services](https://www.capitalnumbers.com/reactjs-development.php?utm_source=Devto&utm_medium=cngblog&utm_id=gp0624dev) to get the most out of using the framework.
## **The Future of React**
The future outlook for React is highly promising, with the framework positioned for continued growth and innovation in web development. React's flexibility, efficiency, and robust ecosystem ensure that it remains a top choice for developers as the demand for dynamic and high-performing user interfaces increases. One emerging trend is the increasing adoption of functional components and hooks. It simplifies code and enhances performance by enabling developers to use state and other React features without writing classes.
Other significant trends are WordPress performance optimization with React and the rise of static site generation with tools like Next.js, which uses React to create fast, SEO-friendly static websites while offering dynamic capabilities when needed. These advancements highlight React’s ability to evolve with industry trends and developer needs. With its strong foundation, active community support, and continuous enhancements, React is well-positioned to maintain its leadership in front-end development, offering a stable and innovative platform for future projects.
| nicholaswinst14 |
1,884,038 | Hire Software Developer | Are you looking to hire a software developer? Hire a Software Developer from TalentOnLease to make... | 0 | 2024-06-11T07:13:41 | https://dev.to/talentonlease01/hire-software-developer-2552 | softwaredevelopment, hire | Are you looking to hire a software developer? **[Hire a Software Developer](https://talentonlease.com/hire-software-developer)** from TalentOnLease to make your concept a reality. Enjoy the ease of having top software development expertise under one roof, suited to your specific business requirements. TalentOnLease's extensive experience in both frontend and backend technologies guarantees fast communication and smooth integration.
Experience speedier development cycles and more cost-effective solutions, all tailored to boost your market presence. Maintain your business with the best talents and customized software solutions. Choose TalentOnLease for excellent outcomes and expert service.
| talentonlease01 |
1,884,037 | API Testing: A Comprehensive Guide | Introduction to API Testing In the realm of software development, APIs (Application Programming... | 0 | 2024-06-11T07:10:50 | https://dev.to/keploy/api-testing-a-comprehensive-guide-5a4h | api, testing, ai, opensource |
**Introduction to API Testing**
In the realm of software development, APIs (Application Programming Interfaces) play a crucial role in enabling different software systems to communicate with each other. They act as intermediaries, allowing applications to interact with external services, databases, or other applications. Given the critical role APIs play, ensuring their reliability, functionality, and performance through [API testing](https://keploy.io/api-testing) becomes essential.
**What is API Testing?**
API testing is a type of software testing that focuses on verifying that APIs work as expected. Unlike traditional UI testing, which involves testing the graphical interface of an application, API testing is concerned with the backend, testing the logic and data-handling capabilities of the API. This process includes testing endpoints, methods, data validation, error handling, security, and performance.
**Importance of API Testing**
1. **Functionality:** Ensures that the API performs the intended tasks correctly and consistently.
2. **Reliability:** Verifies that the API can handle different inputs and conditions without failure.
3. **Performance:** Assesses the speed and efficiency of the API under various conditions.
4. **Security:** Identifies vulnerabilities and ensures data is protected.
5. **Interoperability:** Confirms that the API can interact seamlessly with other systems and APIs.
**Key Concepts in API Testing**
Endpoints
Endpoints are specific addresses where APIs can access the resources they need to perform their functions. Each endpoint represents a specific function or data point within the API.
Methods
Common HTTP methods used in API testing include:
• **GET**: Retrieves data from a server.
• **POST**: Sends new data to a server.
• **PUT**: Updates existing data on a server.
• **DELETE**: Removes data from a server.
**Request and Response**
An API request includes the endpoint and method, often accompanied by headers and a body. The response from the API includes a status code, headers, and sometimes a body containing data or an error message.
**Status Codes**
Standard HTTP status codes indicate the result of the API request:
• 200 OK: Request succeeded.
• 201 Created: Resource successfully created.
• 400 Bad Request: Client error in the request.
• 401 Unauthorized: Authentication required.
• 404 Not Found: Endpoint not found.
• 500 Internal Server Error: Server encountered an error.
**Steps in API Testing**
1. **Understand the API Requirements**
Before testing, it's crucial to have a thorough understanding of the API's purpose, endpoints, methods, and expected inputs and outputs. This information is typically found in the API documentation.
2. **Set Up the Test Environment**
Ensure that the environment for API testing is properly configured. This includes setting up servers, databases, and any necessary network configurations.
3. **Choose the Right Tools**
Selecting the appropriate tools can significantly streamline the testing process. Popular API testing tools include:
• Postman: Widely used for manual and automated API testing.
• SoapUI: Ideal for SOAP and REST API testing.
• JMeter: Primarily used for performance testing.
• REST Assured: A Java library for testing REST APIs.
4. **Create Test Cases**
Develop detailed test cases that cover various scenarios, including:
• Positive Tests: Validate expected behavior with valid inputs.
• Negative Tests: Check API's handling of invalid or unexpected inputs.
• Edge Cases: Test boundaries and limits.
• Performance Tests: Assess response times and throughput under load.
5. **Execute Tests**
Run the test cases and carefully observe the responses. Ensure that the API returns the correct status codes, headers, and data.
6. Validate Responses
Compare the actual responses against the expected outcomes. Look for discrepancies in data, incorrect status codes, and improper error messages.
7. **Report and Fix Issues**
Document any issues found during testing, detailing the steps to reproduce them and their potential impact. Collaborate with the development team to address these issues.
8. **Retest and Regression Testing**
After fixing issues, retest the API to ensure the fixes work. Conduct regression testing to verify that the changes haven't introduced new problems.
**Best Practices in API Testing**
Comprehensive Test Coverage
Ensure that your tests cover all possible scenarios, including edge cases and failure modes. This helps in identifying potential issues that might not be evident in positive test cases.
**Automation**
Automate as many tests as possible to increase efficiency and repeatability. Automated tests can be run frequently, providing quick feedback on the API's health.
**Data-Driven Testing**
Use data-driven testing to run the same test cases with different data inputs. This approach helps in validating the API's behavior under various conditions.
**Mocking and Virtualization**
In cases where the API depends on external services, use mocking and service virtualization to simulate those services. This allows for isolated testing and helps in identifying issues related to external dependencies.
**Security Testing**
Conduct thorough security testing to identify vulnerabilities such as SQL injection, cross-site scripting (XSS), and other common security threats. Ensure that sensitive data is properly encrypted and authenticated.
**Performance Testing**
Regularly perform load testing to ensure that the API can handle the expected number of requests. Use tools like JMeter to simulate different load conditions and analyze the API's performance.
**Continuous Integration**
Integrate API testing into the continuous integration (CI) pipeline. This ensures that tests are run automatically whenever code changes are made, providing immediate feedback and reducing the risk of introducing new issues.
**Challenges in API Testing**
**Lack of Documentation**
Incomplete or outdated documentation can make it challenging to understand the API's functionality and expected behavior.
**Handling Asynchronous APIs**
Testing asynchronous APIs requires a different approach, as the responses may not be immediate. Proper handling of callbacks and promises is necessary.
**Data Dependencies**
APIs often depend on specific data states, which can make setting up test cases complex. Using test data management strategies can help mitigate this challenge.
**Versioning**
APIs may have multiple versions in use simultaneously. Ensuring compatibility and testing across different versions can be challenging but necessary.
**Conclusion**
API testing is a critical aspect of ensuring the reliability, functionality, and performance of modern software applications. By following a structured approach and employing best practices, testers can effectively identify and address issues, leading to robust and reliable APIs. As the landscape of software development continues to evolve, the importance of thorough API testing cannot be overstated, making it an indispensable part of the development lifecycle.
| keploy |
1,884,036 | The Ultimate Guide to Choosing Data Engineering Services for Your Enterprise | Data is the backbone of modern business. Every enterprise, regardless of its size, generates large... | 0 | 2024-06-11T07:10:42 | https://dev.to/mlpds011/the-ultimate-guide-to-choosing-data-engineering-services-for-your-enterprise-1815 | datascience, dataanalytics, ai, machinelearning | Data is the backbone of modern business. Every enterprise, regardless of its size, generates large volumes of data that need to be efficiently processed and analyzed to extract insights and make informed decisions. To do this effectively, many enterprises are turning to data engineering services. However, choosing the right data engineering service provider can be an overwhelming task, given the abundance of options and the complexity of the field. In this article, we'll walk you through the ultimate guide to choosing the right data engineering services for your enterprise.
## Identify your Needs and Objectives
The first step in choosing data engineering services is to identify your needs and objectives. This includes taking stock of your existing data infrastructure and identifying the types of data you generate, your data processing needs, and your desired outcomes. Additionally, you should determine the level of expertise you have in-house and identify potential gaps in technical skills and tools.
With this information in hand, you can better evaluate [data engineering service](https://www.techmango.net/data-engineering-services) providers' capabilities and expertise. Look for providers that fulfill your most essential requirements and specialize in the services you need. A provider with experience in your industry or a specific type of data engineering may be more suitable than a generalist provider.
## Evaluate Technical Expertise
Data engineering services rely heavily on technical expertise, so it is crucial to evaluate providers' technical capabilities. Providers should be up-to-date with the latest tools and technologies and have experience with different data processing and storage frameworks.
When evaluating a data engineering provider's technical expertise, pay particular attention to the following areas:
* Data architecture and modeling
* Data integration
* Data storage and retrieval
* Data processing and transformation
* Data quality management
* Data security and governance
The ability to scale services to accommodate growing data volumes and changing business needs is also essential.
## Consider Data Platforms and Tools
Data engineering services often require access to different data platforms and tools, such as databases, data warehouses, and cloud computing platforms. Identify the data platforms and tools your enterprise is currently using, and evaluate potential data engineering providers' experience and proficiency with the same platforms.
Additionally, providers should be able to work with the tools and platforms that best suit your data processing needs as your business grows and changes.
## Review Data Security and Privacy
Data security and privacy are critical in data engineering services, given the sensitive nature of enterprise data. When choosing a provider, make sure they have robust data security and privacy policies. The provider should comply with all necessary data protection regulations and have strict data access control policies.
Ask potential providers how they intend to keep your data secure. Look for providers that perform regular security audits and have a disaster recovery plan in case of data loss or theft.
## Evaluate Experience and Reputation
Experience and reputation are essential in data engineering services. Look for a provider with a track record of delivering high-quality data engineering services to clients. Read online reviews and testimonials, and ask for references. Ask the provider to share case studies or examples of similar projects they have completed in the past to assess their experience in your industry and the complexity of your data engineering needs.
## Consider Costs and Contract Details
Cost is a significant consideration in data engineering services, especially for small and medium-sized enterprises. When evaluating providers, look for providers that can tailor their services to your budget while delivering value for money.
Consider the provider's pricing model and the services included in the contract. Some providers offer a project-based fee, and others offer ongoing managed services. Determine which model works best for your business and negotiate contract details that align with your goals.
## Conclusion
Choosing the right [data engineering services](https://www.techmango.net/data-engineering-services) for your enterprise is a complex process that requires careful consideration and evaluation of several factors. By identifying your needs and objectives, evaluating providers' technical expertise and experience, considering data platforms and tools, reviewing data security and privacy policies, and considering costs and contract details, you can choose a provider that can help your enterprise process and analyze data effectively, make informed decisions, and achieve your business objectives.
| mlpds011 |
1,884,034 | Best way to start learning Machine Learning | "As soon as it works, no one calls it AI anymore" - John McCarthy Recently I have started to learn... | 27,745 | 2024-06-11T07:09:33 | https://nibodhdaware.hashnode.dev/best-way-to-start-learning-machine-learning | ai, machinelearning | > "As soon as it works, no one calls it AI anymore" - John McCarthy
Recently I have started to learn a new field of Computer Science, Machine Learning. But there are so many resources on Machine Learning out there it becomes very difficult to filter out what resources to begin with, so in this post I am going to list out ways one can start learning this new exciting field.
In my opinion, there are 2 kinds of people who want to learn machine learning:
1\. People who are interested in maths behind it.
2\. People who just want to code and have fun with it.
I definitely fall in the second category as I can do and understand a little bit of math but when I read equations in a ML book or in a research paper I seem to get a little dizzy.
For the people in the first category, I will definitely recommend reading books and research papers and try to understand how everything works, especially, [this](https://www.youtube.com/playlist?list=PLRDl2inPrWQW1QSWhBU0ki-jq_uElkh2a) playlist should help you
This post is for the people in the second category, people who don't want to know a lot of math.
# Types in Machine Learning
Machine learning as a whole is divided into 3 types: Unsupervised, Supervised and Reinforcement
[This](https://www.youtube.com/watch?v=qDbpYUbf3e0) video explains all the types really well, well here's the gist of it if you don't want to watch the video.
Any type of Machine Learning needs data to make the machine learn, well you can give just the data and the model will sort and group the similar data together without any external input, this is Unsupervised Learning, where the data is surely provided but the data is not labeled or given any information on how to group or sort the data, it just groups the data based on similar features.
Supervised Learning is the opposite of it, where we do give the data some labels to nudge the model in the right direction, based on these labels the data is grouped and used by the model.
Reinforcement Learning is where you teach and train a particular model to behave a certain way, the video you watch on youtube of people teaching AI how to walk or play a game like chess or tick tack toe are using Reinforcement Learning.
# Ways to start learning ML
First and foremost you need to understand what are you going to learn in ML? From the 3 types elaborated above, For example I am interested in more graphical and fun stuff like teaching AIs how to walk and play, so I am going to go and learn Reinforcement Learning deeply.
For you it may be you are interested in knowing how ChatGPT works or want to make a OCR system from scratch.
Knowing why you want to learn anything is a great way to be interested in learning that in the long run.
# Nailing the basics
Whatever you do you must nail the basics. In ML it is having a little basic understanding of how statistic and probability works, for that I would recommend you to have a shot at doing [High School Statistics by Khan Academy](https://www.khanacademy.org/math/probability).
Then you must know how to use a library or some ML algorithms, libraries like scikit-learn would be a great start, [this](https://www.youtube.com/watch?v=0B5eIE_1vpU) crash course should help you get started.
Then dive deep into one of the types of machine learning. I would recommend start with learning supervised learning as that would cover most of the topics that you would use elsewhere.
# Conclusion
Machine Learning is this exciting new field that was growing slowly in the background and has grown to the point that it has started to impact everyone's lives and continuous learning is the only way forward.
| nibodhdaware |
1,884,033 | Best Ayurvedic Clinic & Doctors in Delhi NCR | Welcome to Divyarishi, your ultimate destination for Ayurvedic solutions online. As the Best... | 0 | 2024-06-11T07:08:54 | https://dev.to/divyarishi/best-ayurvedic-clinic-doctors-in-delhi-ncr-5f65 | health, ayurveda, doctors, ayurvedic | Welcome to Divyarishi, your ultimate destination for Ayurvedic solutions online. As the [Best Ayurvedic Clinic and Doctors in Delhi NCR](https://www.divyarishi.com/), we pride ourselves on offering holistic treatments rooted in the ancient wisdom of Ayurveda. Our online platform provides access to a plethora of Ayurvedic medicines tailored to address various health concerns, ranging from digestive issues to skin ailments and beyond. At Divyarishi, we understand the importance of personalized care, which is why our team of experienced Ayurvedic doctors is dedicated to crafting customized treatment plans that cater to individual needs. With our commitment to quality and authenticity, we ensure that our products and services adhere to the highest standards, guaranteeing optimal efficacy and safety for our customers. Whether you're seeking relief from chronic conditions or simply aiming to enhance your overall well-being, Divyarishi is here to guide you on your journey to health and vitality. Explore our range of Ayurvedic remedies and discover the transformative power of natural healing today. | divyarishi |
1,884,031 | Top 5 Mistakes Engineering Managers Do 🤦🏻 | Just became a manager or aspire to be one soon? This post might save you a couple of weeks by... | 0 | 2024-06-11T07:08:44 | https://dev.to/middleware/top-5-mistakes-engineering-managers-do-2819 | engineering, management, growth, leadership | Just became a manager or aspire to be one soon? This post might save you a couple of weeks by bringing you insights and learnings from other engineering managers’ mistakes.
In my past two companies, I’ve had the privilege of leading an engineering team. During this time, I experienced and learnt from the common mistakes that managers tend to make. Believe me, it can drastically hamper the team productivity and growth. When I started Middleware, I was fortunate enough to interact with 100s of engineering leaders and learn from their experiences.
In this article, I’ll be sharing the top 5 mistakes engineering managers make and their possible solutions.
Let’s dive right in!
## Mistake 1: Macro management first, Micro management later
Every manager starts with high trust on their team. Hence, they start off by purely delegating the tasks to the report assuming it’ll be done. However, it is not un-common to get blocked or stuck during execution of the task. In the case where a manager is oblivious to this blockage, they only get to know when the task is on a delay.
That’s when they panic and start micro managing because now they don’t trust. Of course, this lack of trust does make their people unhappy(even more unhappier than they were happy) leading to burnouts.
Hence, always..
> “Trust, but verify”
What you can instead do is, micro manage first and macro manage later. Here’s how:
Create a detailed plan with the team
Bring a consensus on a timeline which they believe is right
Now, always follow up on the execution of that plan and be available to unblock them whenever they need you
This makes the discussion objective and constructive than a blameful one and hence fosters more trust and ownership in the team.
## Mistake 2: Never say “No”
Said yes to ad hoc tasks every sprint and now you can’t seem to complete the spilled tasks?
This is what you call a negative spiral. I’ll give you an example of our team’s early days.
A few sprints back, my team was working constantly while still spilling their planned work. They were starting to feel burnt out and that’s when I observed the sprint flow below.
Our ad-hoc task % was rising sprint on sprint and that made our team de-focus from the planned work, resulting into spillage and hence missing the product delivery targets.
Solution: We put a threshold of 20% on the ad-hoc tasks. This meant, we dedicated only 20% of our effort towards ad-hoc. Anything beyond 20% was alarmed(by Middleware) and said “No” to those tasks. This reduced our planned task spillage and also team burnout. A tool like [Middleware](https://github.com/middlewarehq/middleware) can help track this
The result of it? Our product delivery became more predictable.
In fact, in the sprints where there was no ad-hoc work, we started shipping tech level enhancements more!
In all, I’m glad we started saying “no” beyond our threshold. It’s simply because it was not aligned with our goal.
## Mistake 3: Become the most important person in the room
If you think that you are the most important person in the room, it’s time to flip your perspective.
Instead of being part of every discussion, empower the team to run without you. It not only enhances productivity of each team member, but boosts their morale too! As a bonus, you also get time on your hands to make other vital decisions.
Now, how to relinquish control when all you have been doing is ensuring that you are part of each and every discussion?
Let’s talk about this with the help of a common example:
The majority of meetings on your calendar are product discussions with the team where you also need to give approval on what is supposed to go as a part of development.
Till now, you were conducting meetings to give your context. Now what you can do is to just pass over a note of context and expected outcomes to the concerned team members.
To prevent another open discussion, the devs can use technical documents to achieve success.
Lastly, in case there is any context missing, you can write it in the same doc itself. Easy-peasy, right?
## Mistake 4: Expect the product managers to give perfectly written tickets
Chances are, you must have faced these situations as an engineering manager -
“The team is blocked because the stories didn’t have the details”
“The stories have the edge case missing, please revert on those”
These scenarios block product delivery.
To avoid the above situations from occurring, an engineering manager should not directly pass the user story written by the product manager to the engineer.
Instead, you should sit with the product manager and refine these user stories to add engineering details like constraints of scale and the expected deliverables. You should also break down the user story into atomic deliverables.
I call it the “pre-planning” stage.
After this, the developer gets the complete context and they can then act upon these atomic deliverables.
The advantage of this entire practice? It saves tons of back and forth.
**Pro-tip:** If you’re able to break down the user story into independent tasks, you can also get them built in parallel. Doing so will decrease your time for delivery.
## Mistake 5: Have different definitions of “Done”
Let’s admit it — We all have faced this at some point of time in our work journeys.
Having different definitions of “Done” can lead to no or delayed delivery to the actual customer. Hence, it becomes more important than ever to ensure everyone you are working with is on the same page with what “Done” actually means!
“Done” means released to the customer. That’s it, that’s the definition it should have.
**Pro Tip:** As you know, multiple team members are involved on one particular feature. What you can do is, create a primary owner for the feature. This means, this person will communicate about the feature’s progress on behalf of the entire group. The benefit of it all?
Apart from fostering a sense of ownership among your team members, it will also highlight the visibility of your team’s efforts.
## Bonus Mistake: Only focus on tickets and not on development pipeline
A lot of managers end up only doing general management focusing only on tickets, making excel sheets and manual follow ups with the team. Engineering is one of the special teams whose most operational work is digital and most of the times the productivity gains are hidden in the simplest of things - PR review delays/rework, deployment pipeline being slow or errors pushing back our team from working on new stuff - Essentially key stages of shipping software once planning is done.
As an engineering manager, you can do much better! You can take care of the small things like these processes and the big things(delivery) will fall into place. You can use a tool like Middleware for measuring the pipeline improvements for your team using DORA metrics!
{% embed https://github.com/middlewarehq/middleware %}
Say goodbye to manual follow ups and never ending RCAs, welcome a process excellence mindset which will help you add method to the madness 😄
## Learning from the mistakes!
Since there is no silver bullet to engineering management, every manager has to pave their own path. However, it helps to learn from the common ‘eeks’ and ‘oops’ of the people who have walked this path before you.
Hope you recognised some of the mistakes you would have encountered, let me know in the comments 💬
If you’re interested to know the next 5 mistakes, comment on this story and as we hit 5 comments, I’ll write the next 5 mistakes and their remedies ✨
| dhruvagarwal |
1,884,032 | Building a Web Scraping Tool with Python: Extracting News Headlines | Introduction Web scraping allows us to automatically extract data from websites. In this... | 0 | 2024-06-11T07:08:39 | https://dev.to/pranjol-dev/building-a-web-scraping-tool-with-python-extracting-news-headlines-5ak8 | python, tutorial, beautifulsoup, opensource | ## Introduction
Web scraping allows us to automatically extract data from websites. In this tutorial, we'll use Python along with the `requests` and `beautifulsoup4` libraries to build a web scraping tool. Our goal is to fetch news headlines from the BBC News website.
## Prerequisites
Before we start, ensure you have the following:
- Basic understanding of Python programming.
- Python installed on your machine (Python 3.6 or higher).
- Familiarity with HTML and CSS basics (helpful but not required).
## Step 1: Setting Up Your Environment
### Installing Libraries
First, let's install the necessary Python libraries. Open your terminal and run the following command:
```bash
pip install requests beautifulsoup4
```
These libraries will help us make HTTP requests (`requests`) to fetch web pages and parse HTML (`beautifulsoup4`) to extract data.
## Step 2: Writing the Web Scraping Script
### Fetching HTML Content
Now, let's create a Python script named `scraper.py`. Open your favorite code editor and start by importing the required libraries:
```python
import requests
from bs4 import BeautifulSoup
```
Next, define the URL of the BBC News website we want to scrape:
```python
url = 'https://www.bbc.com/news'
```
### Function to Fetch HTML Content
We'll create a function `fetch_html` to fetch the HTML content from a given URL using `requests`:
```python
def fetch_html(url):
try:
response = requests.get(url)
response.raise_for_status() # Raise an HTTPError for bad responses
return response.text
except requests.exceptions.RequestException as e:
print(f"Error fetching HTML: {e}")
return None
```
This function sends a GET request to the URL and returns the HTML content if successful. It handles exceptions to ensure robust error handling.
### Function to Scrape Website for News Headlines
Now, let's define a function `scrape_website` to parse the HTML and extract news headlines using `BeautifulSoup`:
```python
def scrape_website(url):
html = fetch_html(url)
if html:
soup = BeautifulSoup(html, 'html.parser')
headlines = soup.find_all('h3', class_='gs-c-promo-heading__title')
for headline in headlines:
title = headline.text.strip()
print(title)
else:
print("Failed to fetch HTML.")
```
Here's what this function does:
- It calls `fetch_html(url)` to get the HTML content of the BBC News page.
- If the HTML content is retrieved (`if html:`), it uses `BeautifulSoup` to parse the HTML (`soup = BeautifulSoup(html, 'html.parser')`).
- It then finds all `<h3>` elements with the class `gs-c-promo-heading__title`, which typically contain news headlines on the BBC News website.
- For each headline found (`for headline in headlines:`), it extracts the text (`headline.text.strip()`) and prints it.
### Running the Script
To execute the scraping script, add the following code at the end of `scraper.py`:
```python
if __name__ == "__main__":
scrape_website(url)
```
This will run the `scrape_website` function when you run `python scraper.py` in your terminal.
## Step 3: Handling Data and Output
### Storing Data
To store the extracted headlines in a structured format (e.g., CSV or JSON), you can modify the `scrape_website` function to save the data into a file instead of printing it.
### Advanced Scraping Techniques
For more advanced scraping tasks, you might explore:
- Handling pagination (navigating through multiple pages of results).
- Dealing with dynamic content (using tools like Selenium for JavaScript-heavy websites).
- Implementing rate limiting to avoid overwhelming the target website's servers.
## Conclusion
Congratulations! You've built a web scraping tool with Python to extract news headlines from the BBC News website. Web scraping opens up possibilities for automating data collection tasks. Always scrape responsibly and respect the website's terms of service.
## GitHub Repository
I've uploaded the complete code to GitHub. You can view it [here](https://github.com/Pranjol-Dev/web-scraping-tool).
| pranjol-dev |
1,884,030 | Testing and Quality Assurance in Invoice Software Development | Ensuring the reliability, security, and functionality of invoice software requires rigorous testing... | 0 | 2024-06-11T07:05:15 | https://dev.to/tarunnagar/testing-and-quality-assurance-in-invoice-software-development-2a8n | webdev | Ensuring the reliability, security, and functionality of invoice software requires rigorous testing and quality assurance (QA) processes. This article will explore the key aspects of testing and QA in invoice software development, providing practical examples and code snippets to illustrate best practices.
## Importance of Testing and QA
Testing and QA are crucial in software development to:
• Ensure Functionality: Verify that the software performs as intended.
• Enhance Security: Identify and fix vulnerabilities to protect sensitive data.
• Improve User Experience: Ensure the software is user-friendly and free from bugs.
• Maintain Compliance: Adhere to regulatory requirements for data handling and privacy.
Types of Tests for Invoice Software
1. Unit Testing
2. Integration Testing
3. Functional Testing
4. Performance Testing
5. Security Testing
6. User Acceptance Testing (UAT)
Let's delve into each type, including examples and coding practices.
## 1. Unit Testing
Unit tests validate individual components or functions in isolation. For invoice software, this might include testing invoice generation logic, calculations, and data validations.
Example: Unit Test for Invoice Calculation
Using a testing framework like JUnit for Java:
```
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
public class InvoiceCalculatorTest {
@Test
public void testCalculateTotalAmount() {
InvoiceCalculator calculator = new InvoiceCalculator();
double result = calculator.calculateTotalAmount(100, 0.2); // 100 base amount, 20% tax
assertEquals(120, result, "Total amount should be 120");
}
}
class InvoiceCalculator {
public double calculateTotalAmount(double baseAmount, double taxRate) {
return baseAmount * (1 + taxRate);
}
}
```
## 2. Integration Testing
Integration tests check the interaction between different components or systems. For example, testing the integration between the invoice module and the payment gateway.
Example: Integration Test for Payment Gateway Integration
Using Spring Boot Test for a Java application:
```
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.web.servlet.MockMvc;
@SpringBootTest
@AutoConfigureMockMvc
public class PaymentIntegrationTest {
@Autowired
private MockMvc mockMvc;
@Test
public void testPaymentProcess() throws Exception {
String paymentRequestJson = "{\"amount\": 100, \"currency\": \"USD\", \"paymentMethod\": \"credit_card\"}";
mockMvc.perform(post("/processPayment")
.contentType("application/json")
.content(paymentRequestJson))
.andExpect(status().isOk());
}
}
```
## 3. Functional Testing
Functional tests ensure that the software behaves according to the specified requirements. This includes testing user interactions and business processes.
Example: Functional Test for Invoice Generation
Using Selenium WebDriver for a web application:
```
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class InvoiceGenerationTest {
private WebDriver driver;
@BeforeEach
public void setUp() {
driver = new ChromeDriver();
driver.get("http://localhost:8080");
}
@AfterEach
public void tearDown() {
driver.quit();
}
@Test
public void testGenerateInvoice() {
WebElement amountInput = driver.findElement(By.id("amount"));
WebElement taxRateInput = driver.findElement(By.id("taxRate"));
WebElement generateButton = driver.findElement(By.id("generateInvoice"));
amountInput.sendKeys("100");
taxRateInput.sendKeys("0.2");
generateButton.click();
WebElement totalAmount = driver.findElement(By.id("totalAmount"));
assertEquals("120", totalAmount.getText());
}
}
```
## 4. Performance Testing
Performance testing evaluates the software's responsiveness, stability, and scalability under load.
Example: Performance Test with JMeter
JMeter can be used to simulate multiple users generating invoices simultaneously.
```
<testPlan>
<ThreadGroup>
<num_threads>100</num_threads>
<ramp_time>10</ramp_time>
<LoopController>
<loops>1</loops>
</LoopController>
<HTTPSamplerProxy>
<domain>localhost</domain>
<port>8080</port>
<path>/generateInvoice</path>
<method>POST</method>
<Arguments>
<Argument>
<name>amount</name>
<value>100</value>
</Argument>
<Argument>
<name>taxRate</name>
<value>0.2</value>
</Argument>
</Arguments>
</HTTPSamplerProxy>
</ThreadGroup>
</testPlan>
```
## 5. Security Testing
Security testing identifies vulnerabilities and ensures that the software protects sensitive data and transactions.
Example: Security Test for SQL Injection
Using OWASP ZAP to scan for SQL injection vulnerabilities.
```
zap-cli quick-scan --self-contained --start-options '-config api.disablekey=true' http://localhost:8080
```
## 6. User Acceptance Testing (UAT)
UAT involves end-users testing the software to ensure it meets their needs and requirements. This can be done through beta testing and feedback collection.
Example: UAT Feedback Collection
Using tools like SurveyMonkey to gather feedback from beta testers:
```
<form action="https://www.surveymonkey.com/r/your-survey-id" method="post">
<label for="feedback">Please provide your feedback:</label>
<textarea id="feedback" name="feedback"></textarea>
<input type="submit" value="Submit">
</form>
```
## Best Practices for QA in Invoice Software
Automate Testing: Use automation tools for repetitive tests to save time and improve accuracy.
Continuous Integration (CI): Integrate automated tests into CI pipelines to ensure code quality with each update.
Test Coverage: Ensure comprehensive test coverage, including edge cases and potential failure points.
Regular Audits: Conduct regular security and performance audits to maintain software quality.
User Feedback: Continuously collect and incorporate user feedback to improve the software.
## Conclusion
Implementing thorough testing and QA processes is essential for developing reliable, secure, and user-friendly invoice software. By leveraging various testing methodologies and best practices, developers can ensure their software meets high-quality standards and satisfies user requirements. Automation tools and continuous integration further streamline the QA process, making it more efficient and effective. Comprehensive testing is a critical component of [invoice software development](https://devtechnosys.com/invoice-software-development.php), ensuring the final product is robust, scalable, and ready for deployment in real-world scenarios.
| tarunnagar |
1,884,029 | AI Bubble?, Dev Summer '24 Guide & Unverified User Emails | This is a weekly newsletter of interesting Salesforce content See the most interesting... | 25,293 | 2024-06-11T07:02:10 | https://dev.to/sfdcnews/ai-bubble-dev-summer-24-guide-unverified-user-emails-k0j | salesforce, salesforcedevelopment, salesforceadministration, salesforceadmin | # This is a weekly newsletter of interesting Salesforce content
See the most interesting #Salesforce content of the last days 👇
✅ **[Are We in a Dot-Com Style Artificial Intelligence Bubble?](https://www.salesforceben.com/are-we-in-a-dot-com-style-artificial-intelligence-bubble/)**
Since November 2022, the world has been buzzing with AI excitement, especially after the release of ChatGPT. Despite the hype, the actual impact on daily life has been minimal. Some internet entrepreneurs quickly jumped on the AI bandwagon, offering courses and claiming to be experts. But really, using AI chatbots isn't that complicated. The overzealous marketing tactics are a sign that we may be in an AI bubble.
✅ **[The Salesforce Developer's Guide to the Summer '24 Release](https://developer.salesforce.com/blogs/2024/05/summer24-developers.html)**
The Summer '24 release is here! In this post, we highlight what's new for developers across the Salesforce ecosystem.
✅ **[Find Salesforce Users with Unverified Email Addresses](https://www.infallibletechie.com/2023/08/find-salesforce-users-with-unverified-email-addresses.html)**
We can use the TwoFactorMethodsInfo object/entity to query the users who haven't verified their email addresses yet in Salesforce. Admins or Users need the "Manage Multi-Factor Authentication in API" permission at Profile or Permission Set level to query or use SOQL against the TwoFactorMethodsInfo object/entity.
✅ **[Leverage Apex Cursor for Enhanced SOQL Query Result Handling](https://sfdclesson.com/2024/05/05/leverage-apex-cursor-for-enhanced-soql-query-result-handling/)**
In the Summer'24 release, Salesforce introduced Apex cursors (Beta) to help developers handle large SOQL query results in manageable pieces within a single transaction. This feature is beneficial for dealing with extensive result sets that may exceed memory or processing limits. Cursors allow incremental traversal of result sets for forward and backward navigation, offering an alternative to batch Apex with enhanced capabilities for resource-intensive processing jobs.
✅ **[Salesforce Profile Compare Tool : Crazy Compare](https://www.sfdckid.com/2022/10/salesforce-crazy-compare-chrome.html)**
The Crazy Compare Extension is a tool that helps users compare two different profiles in Salesforce quickly and easily. It eliminates the need to manually compare field, object, apex class, and visualforce page access levels. Users can install the Chrome extension and compare profiles directly within their browser, without the need for external data processing. Best of all, it's free to use.
Check these and other manually selected links at https://news.skaruz.com
Click a Like button if you find it useful.
Thanks.
| sfdcnews |
1,884,028 | Ultimate WhatsApp Business Solution | Welcome to Go4Whatsup – Your Ultimate WhatsApp Business Solution! At Go4Whatsup, we know... | 0 | 2024-06-11T07:01:57 | https://dev.to/go4whatsup/ultimate-whatsapp-business-solution-4cl5 | automation, businessapi, whatsappbusinesssolution, whatsappbusinessapi |
**Welcome to Go4Whatsup – Your Ultimate [WhatsApp Business Solution](https://www.go4whatsup.com/)!**
At Go4Whatsup, we know communication is key to business success. That's why we created a WhatsApp Business solution just for you. It boosts your customer engagement to new levels.
**Who We Are:**
Go4Whatsup is a platform that helps businesses communicate better on WhatsApp. Our team offers tools to make your customer interactions smoother and save you time, boosting your profits.
**What Sets Us Apart:**
**Chatbot Creation:** With Go4Whatsup, you can easily make smart and customizable chatbots. These chatbots engage with customers 24/7, answer questions, guide users, and give instant replies for a smooth experience.
**Automated Messaging:** Use our automated messaging to send timely messages to your customers. Whether it's promos, order updates, or announcements, Go4Whatsup lets you schedule and send them easily, keeping your audience engaged.
**Effortless Conversation Management:** Our platform makes managing customer conversations simple. Track and respond to messages efficiently, so no question is left unanswered. Go4Whatsup's interface keeps all your communication organized.
**Why Choose Go4Whatsup:**
**Increased Efficiency:** Save time by automating routine tasks, letting your team focus on strategic business aspects.
**Enhanced Customer Engagement:** Use WhatsApp to connect personally with your audience. Go4Whatsup helps build strong relationships and brand loyalty through timely, interactive communication.
**Scalability:** Whether you're a small startup or a large company, Go4Whatsup grows with you. Our solution adapts to your needs, ensuring you succeed in the digital world.
**Join the Go4Whatsup Community:**
See the difference Go4Whatsup can make for your business. Join our community of users who have transformed their customer engagement with our WhatsApp Business solution.
At Go4Whatsup, we're more than a platform – we're your partner in success. Improve your communication, boost customer satisfaction, and **[grow your business with Go4Whatsup today](https://www.go4whatsup.com/contact-us/)**! | go4whatsup |
1,884,027 | How to Remove an Item from an Array in React State | Removing an item from an array in React state is straightforward using the filter method. This method... | 0 | 2024-06-11T07:00:52 | https://dev.to/szwn/how-to-remove-an-item-from-an-array-in-react-state-2dl | react, array, filter | Removing an item from an array in React state is straightforward using the filter method. This method creates a new array without the specified item.
### Example
Initial Array:
```jsx
const arr = [1, 2, 3];
```
Create a New Array without the Item:
```jsx
const new_arr = arr.filter((item) => item !== 2);
```
Result:
```jsx
console.log(new_arr); // [1, 3]
```
## Implementation in React
### State Initialization
The state `items` is initialized with an array of strings.
```jsx
const [items, setItems] = useState([
"Item One",
"Item Two",
"Item Three",
"Item Four",
"Item Five",
]);
```
### Removing an Item
The `removeItem` function uses `setItems` to update the state. It filters out the item to be removed by creating a new array that excludes the specified item.
```jsx
const removeItem = (itemToRemove) => {
setItems((prevItem) => prevItem.filter((item) => item !== itemToRemove));
};
```
### Rendering Items
The items are mapped to display each one with a `Delete` button. Clicking the button triggers `removeItem` to update the state.
```jsx
<div className="p-8 flex flex-col gap-4 items-start">
{items.map((item) => (
<div key={item} className="text-sm flex border px-2 py-1 items-center">
<p className="w-32">{item}</p>
<button
className="border rounded bg-red-600 p-1 text-slate-200"
onClick={() => removeItem(item)}
>
Delete
</button>
</div>
))}
</div>
```
### Full code
```jsx
import { useState } from "react";
export default function App() {
const [items, setItems] = useState([
"Item One",
"Item Two",
"Item Three",
"Item Four",
"Item Five",
]);
const removeItem = (itemToRemove) => {
setItems((prevItem) => prevItem.filter((item) => item !== itemToRemove));
};
return (
<div className="p-8 flex flex-col gap-4 items-start">
{items.map((item) => (
<div key={item} className="text-sm flex border px-2 py-1 items-center">
<p className="w-32">{item}</p>
<button
className="border rounded bg-red-600 p-1 text-slate-200"
onClick={() => removeItem(item)}
>
Delete
</button>
</div>
))}
</div>
);
}
```
## Conclusion
Using the `filter` method in React allows you to effectively manage and update arrays in the state, ensuring a clean and efficient way to remove items. | szwn |
1,884,026 | 43Win - Dang Nhap Chinh Thuc - No Hu - Ban Ca Casino Truc Tuyen | 43Win Dang nhap nhan tien cuoc free · Tang 100% nap dau tien No hu ban ca. · Boi thuong cuoc thua 5%... | 0 | 2024-06-11T07:00:44 | https://dev.to/43winclub/43win-dang-nhap-chinh-thuc-no-hu-ban-ca-casino-truc-tuyen-4maf | 43wincom | 43Win Dang nhap nhan tien cuoc free · Tang 100% nap dau tien No hu ban ca. · Boi thuong cuoc thua 5% tai The thao, Slot Ban ca. · Tang +0,5% cuoc thua cho tat ca khach hang Dang ky nhan khuyen mai dac biet khi dang ky thanh vien moi.
Dia chi: 239 Ng. 68 D. Phu Dien, Phu Dien, Bac Tu Liem, Ha Noi, Viet Nam
Email: ottyhafkpishqv@tmt.steinermolanoigens.org
Website: https://43win.club/
Post Code: 11900
#43win #43wincom
Social:
https://www.facebook.com/43winclub/
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https://hub.docker.com/u/43winclub | 43winclub |
1,884,529 | 5 Practical Ways to Add Polly to Your C# Application [2024] | Polly is a .NET library that helps to increase the resiliency of your application. It offers a... | 27,554 | 2024-06-12T10:53:28 | https://blog.postsharp.net/polly.html | dotnet, dotnetcore, csharp, polly | ---
title: 5 Practical Ways to Add Polly to Your C# Application [2024]
published: true
date: 2024-06-12 07:00:02 UTC
tags: dotnet, dotnetcore, csharp, polly
canonical_url: https://blog.postsharp.net/polly.html
series: The Timeless .NET Engineer
---
Polly is a .NET library that helps to increase the resiliency of your application. It offers a myriad of strategies such as Retry, Circuit Breaker, Timeout, Rate Limiter, Fallback, and Hedging to manage unexpected behaviors. Polly also offers chaos engineering features, enabling you to introduce unexpected behaviors into your app, allowing you to test your resilience setup without waiting for a real incident. In this article, we will focus on practical implementation strategies to add Polly to your .NET app.
We will describe the following approaches:
1. [Using built-in support in the client API](approach-1), typically in `HttpClient`.
2. [Adding Polly to your business code](approach-2), doing things manually.
3. [Using the Type Decorator pattern](approach-3) to reduce boilerplate.
4. [Reducing boilerplate with an aspect](approach-4) featuring Metalama as another, more general approach to boilerplate reduction.
5. [Adding Polly to ASP.NET inbound requests](approach-5) using ASP.NET middleware.
## 1. Using built-in support in the client API
Certain components are designed with Polly in mind. One of them is the `HttpClient` class that comes with .NET. Microsoft provides the [`Microsoft.Extensions.Http.Resilience`](https://www.nuget.org/packages/Microsoft.Extensions.Http.Resilience) and [`Microsoft.Extensions.Resilience`](https://www.nuget.org/packages/Microsoft.Extensions.Resilience) libraries. These libraries are built with Polly and simplify the integration of resilience into the .NET application.
Here’s a straightforward example that retrieves data from an HTTP endpoint and retries when there’s a failure. It calls the `AddStandardResilienceHandler` method to inject pre-configured resilience policies into the `HttpClient`.
```cs
const string httpClientName = "MyClient";
var services = new ServiceCollection()
.AddLogging( b => b.AddConsole().SetMinimumLevel( LogLevel.Debug ) )
.AddHttpClient( httpClientName )
.AddStandardResilienceHandler()
.Services
.BuildServiceProvider();
var clientFactory = services.GetRequiredService<IHttpClientFactory>();
var client = clientFactory.CreateClient( httpClientName );
var response = await client.GetAsync(
"http://localhost:52394/FailEveryOtherTime" );
Console.WriteLine( await response.Content.ReadAsStringAsync() );
```
> The full source code for this article is available from [blog.postsharp.net](https://blog.postsharp.net/polly.html).
You can customize the resilience policies by passing options as an argument to the `AddStandardResilienceHandler` method. You can learn more about the resilience strategies in the [Polly documentation](https://www.pollydocs.org/).
### Avoid creating HttpClient instances yourself
The `AddStandardResilienceHandler` method will work only if you get your `HttpClient` instances by using the `IHttpCientFactory` you get from the service provider. It won’t handle the case where an `HttpClient` instance is created using its constructor. It might be challenging to remember this rule. Luckily, software architecture validation tools, like Metalama, can prevent developers from writing code that breaks this rule. Adding the following code to your project would trigger warnings wherever the `HttpClient`’s constructor is used explicitly:
```cs
internal class AvoidInstantiatingHttpClientFabric : ProjectFabric
{
public override void AmendProject( IProjectAmender amender )
{
amender
.Verify()
.SelectTypes( typeof(HttpClient) )
.SelectMany( t => t.Constructors )
.CannotBeUsedFrom(
r => r.Always(),
$"Use {nameof(IHttpClientFactory)} instead." );
}
}
```
With this code in your project, code using the `HttpClient` constructor will immediately be reported with a warning.
## 2. Adding Polly to your business code
There are a few cases where you might need to call Polly directly from your business code or data access layer. One of those is when there’s no component-specific API for managing application resilience. The second is when the business logic involves several steps that must be retried as a whole.
Let’s consider a method that executes SQL commands on a cloud database service. This is a money transfer operation, where both account updates must be performed atomically in a transaction.
```cs
public async Task TransferAsync(
int sourceAccountId,
int targetAccountId,
int amount,
CancellationToken cancellationToken = default )
{
var transaction = await connection.BeginTransactionAsync( cancellationToken );
try
{
await using ( var command = connection.CreateCommand() )
{
command.CommandText =
"UPDATE accounts SET balance = balance - $amount WHERE id = $id";
command.AddParameter( "$id", sourceAccountId );
command.AddParameter( "$amount", amount );
await command.ExecuteNonQueryAsync( cancellationToken );
}
await using ( var command = connection.CreateCommand() )
{
command.CommandText =
"UPDATE accounts SET balance = balance + $amount WHERE id = $id";
command.AddParameter( "$id", targetAccountId );
command.AddParameter( "$amount", amount );
await command.ExecuteNonQueryAsync( cancellationToken );
}
await transaction.CommitAsync( cancellationToken );
}
catch
{
await transaction.RollbackAsync( cancellationToken );
throw;
}
}
```
Occasionally, an influx of requests may temporarily overload the database. In such cases, we might want to retry the whole transaction.
The best way to add Polly to your services is to [use dependency injection](https://www.pollydocs.org/advanced/dependency-injection.html) and to add a resilience policy to the `IServiceCollection`. We configure the policy with a [Retry Strategy](https://www.pollydocs.org/strategies/retry.html) that reacts when the database commands fail on the `DbException`, waits initially 1 second, followed by [an exponential backoff strategy](https://www.pollydocs.org/strategies/retry.html?q=exponential#calculation-of-the-next-delay), and retries no more than 3 times:
```cs
services.AddResiliencePipeline(
"db-pipeline",
pipelineBuilder =>
{
pipelineBuilder.AddRetry(
new RetryStrategyOptions
{
ShouldHandle = new PredicateBuilder()
.Handle<DbException>(),
Delay = TimeSpan.FromSeconds( 1 ),
MaxRetryAttempts = 3,
BackoffType = DelayBackoffType.Exponential
} )
.ConfigureTelemetry( LoggerFactory.Create(
loggingBuilder => loggingBuilder.AddConsole() ) );
} );
```
With the pipeline in place, we can consume it from the `Accounts` service.
```cs
internal class Accounts(
DbConnection connection,
[FromKeyedServices( "db-pipeline" )]
ResiliencePipeline resiliencePipeline )
```
We can wrap the method to be retried with a call to the policy’s `Execute` method.
```cs
public async Task TransferAsync(
int sourceAccountId,
int targetAccountId,
int amount,
CancellationToken cancellationToken = default )
{
await resiliencePipeline.ExecuteAsync(
async t =>
{
var transaction = await connection.BeginTransactionAsync( t );
try
{
await using ( var command = connection.CreateCommand() )
{
command.CommandText =
"UPDATE accounts SET balance = balance - $amount WHERE id = $id";
command.AddParameter( "$id", sourceAccountId );
command.AddParameter( "$amount", amount );
await command.ExecuteNonQueryAsync( t );
}
await using ( var command = connection.CreateCommand() )
{
command.CommandText =
"UPDATE accounts SET balance = balance + $amount WHERE id = $id";
command.AddParameter( "$id", targetAccountId );
command.AddParameter( "$amount", amount );
await command.ExecuteNonQueryAsync( t );
}
await transaction.CommitAsync( t );
}
catch
{
await transaction.RollbackAsync( t );
throw;
}
},
cancellationToken );
}
```
## 3. Using the Type Decorator pattern
Instead of editing all code locations that use a `DbCommand`, an alternative approach is to inject the Polly logic into the `DbCommand` itself. Since `DbCommand` is an abstract class, we can implement a [Type Decorator pattern](https://blog.postsharp.net/decorator-pattern) and wrap the call to the real database client with a call to Polly.
Some database connectors, like the [SqlConnection](https://learn.microsoft.com/en-us/dotnet/api/microsoft.data.sqlclient.sqlconnection.retrylogicprovider) class, already have their retry mechanism and would not benefit from an additional decorator.
Here is a partial implementation of `ResilientDbCommand` that follows the Type Decorator pattern:
```cs
public partial class ResilientDbCommand(
DbCommand underlyingCommand,
ResiliencePipeline resiliencePipeline ) : DbCommand
{
public override int ExecuteNonQuery()
=> resiliencePipeline.Execute( underlyingCommand.ExecuteNonQuery );
public override object? ExecuteScalar()
=> resiliencePipeline.Execute( underlyingCommand.ExecuteScalar );
protected override DbDataReader ExecuteDbDataReader(
CommandBehavior behavior )
=> resiliencePipeline.Execute( () =>
underlyingCommand.ExecuteReader( behavior ) );
public override void Prepare()
=> resiliencePipeline.Execute( underlyingCommand.Prepare );
public override void Cancel()
=> resiliencePipeline.Execute( underlyingCommand.Cancel );
}
```
And here is how the connection is initialized.
```cs
await using var connection = new UnreliableDbConnection( new SqliteConnection( "Data Source=:memory:" ) );
var resiliencePipeline = CreateRetryOnDbExceptionPipeline();
var resilientConnection = new ResilientDbConnection(
connection, resiliencePipeline );
services.AddSingleton<DbConnection>( resilientConnection );
```
In this manner, the data layer code remains unchanged.
There is a fundamental difference between the two previous approaches: while the type-decorator approach retries an individual `DbCommand`, the data-layer approach retries the whole transaction. This difference can be significant if the `DbCommand` executes a non-transactional, multi-step operation, such as a stored procedure.
## 4. Reducing boilerplate with an aspect
When the Type Decorator pattern is not possible or convenient, there is still a better approach than using Polly directly in the business code. Imagine that your business code does not have a single method as in this simplistic example, but hundreds or thousands. Do you really want to repeat the Polly boilerplate for each of them? Probably not.
Fortunately, there are tools that allow you to add features to methods without modifying their source code, thus keeping the code readable. One such tool is [Metalama](https://www.postsharp.net/metalama). Metalama allows for moving the wrapping logic to a [custom attribute](https://learn.microsoft.com/en-us/dotnet/standard/attributes/), called an _aspect_. You can compare an aspect to a [code template](https://doc.postsharp.net/metalama/conceptual/aspects/templates).
Without going into details, here is the source code of the aspect, where `OverrideMethod` is the template for non-async methods.
```cs
public partial class RetryAttribute : OverrideMethodAspect
{
private readonly string _pipelineName;
[IntroduceDependency]
private readonly ResiliencePipelineProvider<string> _resiliencePipelineProvider;
public RetryAttribute( string pipelineName = "default" )
{
this._pipelineName = pipelineName;
}
public override dynamic? OverrideMethod()
{
var pipeline = this._resiliencePipelineProvider
.GetPipeline( this._pipelineName );
return pipeline.Execute( Invoke );
object? Invoke( CancellationToken cancellationToken = default )
{
return meta.Proceed();
}
}
}
```
If we add the aspect to our method, the code template will be expanded at compile time. As a bonus, we also implemented transaction handling as an aspect:
```cs
[Retry]
[DbTransaction]
public async Task TransferAsync(
int sourceAccountId,
int targetAccountId,
int amount,
CancellationToken cancellationToken = default )
{
await using ( var command = this._connection.CreateCommand() )
{
command.CommandText =
"UPDATE accounts SET balance = balance - $amount WHERE id = $id";
command.AddParameter( "$id", sourceAccountId );
command.AddParameter( "$amount", amount );
await command.ExecuteNonQueryAsync( cancellationToken );
}
await using ( var command = this._connection.CreateCommand() )
{
command.CommandText =
"UPDATE accounts SET balance = balance + $amount WHERE id = $id";
command.AddParameter( "$id", targetAccountId );
command.AddParameter( "$amount", amount );
await command.ExecuteNonQueryAsync( cancellationToken );
}
}
```
As you can see, we got rid of most of the boilerplate code in this code.
## 5. Adding Polly to ASP.NET inbound requests
We have seen approaches to add Polly to _client_ endpoints (both HTTP and database), and approaches to add Polly in your business code. A third possibility is to add Polly at your _server_ endpoint, that is, to wrap your entire request processing in a Polly policy.
Indeed, in ASP.NET Core apps, Polly can be easily introduced as a middleware. To illustrate this approach, let’s consider a microservice that processes data of a public API endpoint. Since we have no control over the endpoint, we need to handle any transient failures on our app’s side.
Any class with an `InvokeAsync` method of the proper signature can be an ASP.NET Core middleware. Here is ours. It consumes the Polly policy named `middleware`, which we need to configure exactly as in the above examples. The only difficulty to overcome is that we need to supply a _restartable_ `HttpContext` to the downstream handler because an exception could happen in the middle of writing the HTTP response, and retrying the whole operation could cause a duplication of the output that has been written before the exception.
```cs
// Noted that keyed service does not seem available for middleware.
public class ResilienceMiddleware( RequestDelegate next, ResiliencePipelineProvider<string> pipelineProvider )
{
public async Task InvokeAsync( HttpContext httpContext )
{
var pipeline = pipelineProvider.GetPipeline( "middleware" );
var bufferingContext = new RestartableHttpContext( httpContext );
await bufferingContext.InitializeAsync( httpContext.RequestAborted );
await pipeline.ExecuteAsync(
async _ =>
{
bufferingContext.Reset();
await next( bufferingContext );
},
httpContext.RequestAborted );
await bufferingContext.AcceptAsync();
}
}
```
To add the middleware in the ASP.NET Core pipeline, use the `UseMiddleware` method:
```cs
var app = builder.Build();
app.UseMiddleware<ResilienceMiddleware>();
```
Now all the requests served by our microservice are handled by Polly. The microservice then behaves more reliably, even when depending on services that experience transient failures.
## Summary
Polly is a useful .NET library that helps make our .NET app resilient using various strategies. Polly can be added using a component-specific API, directly to your code, or using the decorator pattern, either by creating a wrapping type, or by moving the resiliency logic to method decorators (aspect-oriented), to keep your code clean, maintainable, and scalable, without losing the resiliency power of Polly.
This article was first published on a [https://blog.postsharp.net](https://blog.postsharp.net) under the title [5 Practical Ways to Add Polly to Your C# Application [2024]](https://blog.postsharp.net/polly.html). | gfraiteur |
1,878,473 | Building a Travel Agency Website with the Rapyd Payment Gateway | By Marshall Chikari The Rapyd Collect API simplifies online payments on your website while also... | 0 | 2024-06-11T07:00:00 | https://community.rapyd.net/t/building-a-travel-agency-website-with-the-rapyd-payment-gateway/59353 | ecommerce, payments, fintech, rapydtuts | By **Marshall Chikari**
The [Rapyd Collect API](https://docs.rapyd.net/en/rapyd-collect-363484.html) simplifies online payments on your website while also handling payments from all over the world with different currencies and methods. Rapyd is an API first company that allows you to collect, hold, and disburse funds in various countries using local payment methods.
In this tutorial, you'll use a travel agency website as an example to see just how easy it is to use this API. By the end of the tutorial, you'll know how to integrate an effective payment system that you can use in many other web development projects. You'll be using Python Flask for the backend, React.js for the frontend, and SQLite for the database, so you'll be well equipped to handle payments for any online venture.
## Prerequisites
Before you begin, make sure you have the following:
- [Python and Flask](https://flask.palletsprojects.com/en/2.3.x/)
- [React.js](https://react.dev/)
- [SQLite](https://www.sqlalchemy.org/) for the database
- [Rapyd Client Portal account](https://dashboard.rapyd.net/) for accessing the Collect API
## Setting Up the Project Structure
Let's start by setting up the project structure.
First, create a new project directory:
```bash
mkdir python-react-rapyd
cd python-react-rapyd
```
Initialize a virtual environment for Flask:
```bash
python -m venv venv
source venv/bin/activate # On Windows, use `venv\Scripts\activate`
```
Virtual environments are essential for isolating Python dependencies used in different projects. By creating a virtual environment named `venv`, you ensure that the packages and dependencies required for our Flask backend won't interfere with other Python projects on the system. Activating the virtual environment with the source `venv/bin/activate` or `venv\Scripts\activate on Windows` ensures that any installed packages are contained within this environment.
Create a Flask project:
```bash
pip install flask flask-sqlalchemy flask-bcrypt PyJWT flask-cors requests
mkdir python-backend
touch python-backend/app.py
```
Flask is a lightweight and flexible Python web framework that you'll use to build the backend of the travel agency website. By installing Flask and creating a dedicated directory for the backend `python-backend`, you establish the foundation for your server-side logic. You'll place all Flask-related code and files within this directory. The **app.py** file created within `python-backend` will serve as the entry point for our Flask application, where you define routes, database models, and other server-side functionality.
## Adding User Registration and Login (Flask Backend)
You'll next enhance the Flask backend to include user registration and login functionality. Visit the [GitHub repository](https://github.com/Rapyd-Samples/Building-a-Travel-Agency-Website-with-the-Rapyd-Payment-Gateway-Python-Flask-and-React) for the complete code.
You need to define a user model in `python-backend/app.py` to represent user data. Add the following code within your Flask app:
```python
class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(50), unique=True, nullable=False)
password = db.Column(db.String(60), nullable=False)
```
You'll now create a new route for user registration. Add the following code to your **app.py** file to create a user registration endpoint:
```python
@app.route('/api/register', methods=['POST'])
def register():
data = request.get_json()
username = data.get('username')
password = data.get('password')
if not username or not password:
return jsonify({'message': 'Username and password are required'}), 400
hashed_password = bcrypt.generate_password_hash(password).decode('utf-8')
new_user = User(username=username, password=hashed_password)
db.session.add(new_user)
try:
db.session.commit()
return jsonify({'message': 'User registered successfully'}), 201
except Exception as e:
db.session.rollback()
if 'UNIQUE constraint failed' in str(e):
return jsonify({'message': 'Username already exists'}), 400
else:
return jsonify({'message': 'An error occurred'}), 500
```
To create a user login endpoint, add this code to **app.py**:
```python
@app.route('/api/login', methods=['POST'])
def login():
data = request.get_json()
username = data.get('username')
password = data.get('password')
if not username or not password:
return jsonify({'message': 'Username and password are required'}), 400
user = User.query.filter_by(username=username).first()
if user and bcrypt.check_password_hash(user.password, password):
token = generate_token(username)
return jsonify({'user_id': user.id, 'token': token, 'message': 'Login successful'}), 200
else:
return jsonify({'message': 'Invalid username or password'}), 401
```
To run the Flask app, use the following command in your terminal while you're in the directory `python-backend`:
```bash
python app.py
```
This creates an instance of the database and the necessary tables, as you can see in the following screenshot:
## Create React Frontend
Open your terminal and navigate to your project's root directory (`python-react-rapyd`).
Run the following command to create a new React application called `react-frontend`:
```js
npx create-react-app react-frontend
```
This command sets up a new React project with the default project structure.
### Remove Unnecessary Files
By default, `create-react-app` generates many files and folders that you might not need for this project. Let's clean up the project structure.
Navigate to the `react-frontend` directory, go into the `src` directory, and remove all files from the `components` directory except for **App.js**. Your `src` directory should now contain only the following files:
```bash
App.js
index.js
index.css
```
You'll next create the necessary components for login, registration, and trip listing. Inside the `src` directory, create a new folder called `components`:
```bash
mkdir src/components
```
Inside the `src/components` directory, add the following files to create the new components:
```bash
Login.js
Register.js
TripList.js
```
Now that you have the necessary components, update `src/App.js` to include routing for login, registration, and trip listing pages. You can use the `react-router-dom` library for this purpose.
Install `react-router-dom` by running the following command inside the `react-frontend` directory:
```bash
npm install react-router-dom
```
Update `src/App.js` to include routing for the components by adding the following code:
```jsx
import React from "react";
import { BrowserRouter as Router, Route, Redirect, Switch } from "react-router-dom";
import Login from "./components/Login";
import Register from "./components/Register";
import TripList from "./components/TripList";
function App() {
return (
<Router>
<Switch>
<Route exact path="/login">
<Login />
</Route>
<Route exact path="/register">
<Register />
</Route>
<Route exact path="/trips">
<TripList />
</Route>
<Redirect to="/login" />
</Switch>
</Router>
);
}
export default App;
```
Implement the login functionality in the **Login.js** component. This component will include a form where users can enter their username and password to log in. When the user submits the form, it will make an API request to the Flask backend for authentication.
Here's the code for the **Login.js** component:
```jsx
import React, { useState } from "react";
import { useCookies } from "react-cookie";
import axios from "axios";
function Login() {
const [username, setUsername] = useState("");
const [password, setPassword] = useState("");
const [cookies, setCookie] = useCookies(["token"]);
const [loginError, setLoginError] = useState("");
async function handleSubmit(event) {
event.preventDefault();
try {
const response = await axios.post("http://localhost:5000/v1/login", {
username,
password,
});
const { token, user_id } = response.data;
setCookie("token", token, { path: "/" });
setCookie("user_id", user_id, { path: "/" });
window.location.href = "/";
} catch (error) {
if (error.response && error.response.data.message) {
setLoginError(error.response.data.message);
} else {
setLoginError("Login failed. Please try again.");
}
}
}
return (
<div>
<h2>Login</h2>
{loginError && <p style={{ color: "red" }}>{loginError}</p>}{" "}
<form onSubmit={handleSubmit}>
<label>
Username:
<input
type="text"
value={username}
onChange={(e) => setUsername(e.target.value)}
/>
</label>
<br />
<label>
Password:
<input
type="password"
value={password}
onChange={(e) => setPassword(e.target.value)}
/>
</label>
<br />
<input type="submit" value="Submit" />
</form>
</div>
);
}
export default Login;
```
In the code above, you use the `axios` library to make an API request to the Flask backend when the user submits the login form. In the `handleSubmit` function, you use **axios.post** to send a POST request to the Flask login endpoint (`http://localhost:5000/v1/login`). You then pass the username and password from the component's state as the request data. If the login is successful, you receive a response that typically includes a token and user ID, like in the image below:
To run the React application, run the following command in the directory `react-frontend`:
```bash
npm start
```
Here is a demonstration of the features of the base application, which involves creating a user account and making a booking.
### Integrate the Hosted Checkout Page in Your App
Before you can use Rapyd's payment services, you need to obtain API keys.
Visit the [Rapyd Client Portal](https://dashboard.rapyd.net/) and retrieve your access keys by navigating to the **Developers** section:
## Set Up the Checkout Page
You can also update your checkout page to fit your brand. Just head over to the **Branding** section in the Rapyd Client Portal under **Settings > Branding**.
Here, you can pick the type of hosted page you want, like the hosted checkout, and add your company's logo to make it truly yours. You can even play with button colors, set up a fallback URL for a smoother user experience, and explore other branding options that fit your style. Don't forget to hit **Save** to put your changes into action. Whether you run a travel agency or any online business, these tweaks will help you craft a checkout experience that feels just right for your customers.
### Implement Checkout in React
You'll now incorporate Rapyd Checkout into your travel agency website, allowing your users to securely make payments on a Rapyd hosted checkout page. Begin by integrating the provided code snippet into your **TripList.js** component:
```jsx
import React, { useState, useEffect } from "react";
import axios from "axios";
import { useCookies } from "react-cookie";
function TripList() {
const [trips, setTrips] = useState([]);
const [cookies] = useCookies(["token"]);
const [bookingMessage, setBookingMessage] = useState(""); // State to track booking message
useEffect(() => {
const token = cookies.token;
if (!token) {
console.error("Token is missing");
return;
}
// Fetch the list of trips when the component mounts
axios
.get("http://localhost:5000/v1/trips", {
headers: {
Authorization: token,
},
})
.then((response) => {
setTrips(response.data.trips);
})
.catch((error) => {
console.error("Error fetching trips:", error);
});
}, [cookies.token]);
const handleBookTrip = (tripId) => {
const token = cookies.token;
const userId = cookies.user_id;
if (!token || !userId) {
console.error("Token or user ID is missing");
return;
}
// Make a POST request to your backend to initiate the Rapyd payment
axios
.post(
"http://localhost:5000/v1/bookings",
{ trip_id: tripId, user_id: userId },
{
headers: {
Authorization: token,
},
}
)
.then((response) => {
if (response.status === 201) {
if (
response.data.payment_response &&
response.data.payment_response.redirect_url
) {
const redirectUrl = response.data.payment_response.redirect_url;
// Redirect the user to the Rapyd hosted checkout page
window.location.href = redirectUrl;
} else {
setBookingMessage("Redirect URL not provided in the response!");
}
} else {
setBookingMessage("Booking failed");
}
})
.catch((error) => {
setBookingMessage("Error booking a trip");
console.log("Error booking trip:", error);
});
};
return (
<div>
<h2>Trip List</h2>
<ul>
{trips.map((trip) => (
<li key={trip.id}>
{trip.name} - ${trip.price} - {""}
<button onClick={() => handleBookTrip(trip.id)}>Book</button>
</li>
))}
</ul>
{bookingMessage && <p>{bookingMessage}</p>}{" "}
{/* Display booking success message */}
</div>
);
}
export default TripList;
```
This component, **TripList.js**, uses the `useEffect` hook to fetch a list of trips from your backend API when it mounts. It uses the `axios` library to make a GET request to the `/v1/trips` endpoint, passing the authorization token in the header. The `handleBookTrip` function is called when the user clicks the **Book** button for a specific trip. It makes a `POST` request to your backend's `/v1/bookings` endpoint, passing the `trip_id` and `user_id` to initiate the booking process. When the `POST` request is successful (`HTTP status code 201`), it receives a response containing payment details, including the `redirect_url`. If the `redirect_url` is provided, the user is redirected to the Rapyd hosted checkout page.
If there's an error during the booking process, appropriate error messages are displayed using the `bookingMessage` state.
### Rapyd Utility Functions
The **rapyd_utils.py** file contains utility functions for interacting with the Rapyd API. These functions help with generating signatures and timestamps and making requests to Rapyd's API.
Here's a brief explanation of the key functions:
- `generate_salt`: generates a random string that is used as a salt
- `get_unix_time`: returns the current Unix timestamp
- `update_timestamp_salt_sig`: generates a signature for the API request based on the HTTP method, path, body, and API keys
- `current_sig_headers`: creates headers including access key, salt, timestamp, signature, and idempotency for the API request
- `pre_call`: prepares data (body, salt, timestamp, and signature) before making an API call
- `create_headers`: creates headers for the API request
- `make_request`: makes an HTTP request to the Rapyd API using the provided HTTP method, path, and body
These utility functions are used in your Flask backend to interact with the Rapyd API and initiate the payment process. Make sure to replace 'SECRET_KEY' and 'ACCESS_KEY' with your actual Rapyd API keys in the **rapyd_utils.py** file when you integrate it with your backend.
Here is a demo image of the integration:
## Get the Code
Get the [**code**](https://github.com/Rapyd-Samples/Building-a-Travel-Agency-Website-with-the-Rapyd-Payment-Gateway-Python-Flask-and-React), build something amazing with the Rapyd API, and share it with us here in the developer community. Hit reply below if you have questions or comments.
| uxdrew |
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