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1,922,543 | Elevate Your MySQL Mastery with the 'MySQL Practice Challenges' Course | The article is about the 'MySQL Practice Challenges' course, which is designed to help both beginner and experienced SQL developers hone their MySQL skills through a series of practical exercises and real-world scenarios. The course covers a wide range of topics, including writing efficient and optimized queries, handling complex data manipulation tasks, improving database performance, and maintaining data integrity. By the end of the course, learners will be able to confidently tackle a variety of MySQL challenges, enhance their problem-solving skills, and demonstrate their MySQL expertise to stand out in the job market or as a freelance developer. The article highlights the course's comprehensive curriculum, hands-on approach, and the opportunity for learners to elevate their MySQL mastery. | 27,755 | 2024-07-13T17:26:41 | https://dev.to/labex/elevate-your-mysql-mastery-with-the-mysql-practice-challenges-course-3obl | labex, programming, course, mysql |
Unlock your full potential as a SQL developer and take your skills to new heights with the comprehensive 'MySQL Practice Challenges' course. Whether you're a beginner seeking to build a solid foundation or an experienced professional aiming to refine your expertise, this course offers a dynamic and engaging learning experience that will transform the way you approach database-related tasks.
## Dive into Practical MySQL Exercises
The [MySQL Practice Challenges course](https://labex.io/courses/mysql-practice-challenges) is designed to challenge you with a diverse range of practical exercises and real-world scenarios. By immersing yourself in these hands-on challenges, you'll have the opportunity to apply your MySQL knowledge in a meaningful way, honing your problem-solving abilities and developing a deeper understanding of SQL concepts.
## Enhance Your SQL Proficiency
Throughout the course, you'll explore a wide array of topics that will elevate your MySQL proficiency. From writing efficient and optimized queries to mastering complex data manipulation techniques, such as filtering, aggregation, and joins, you'll gain the skills needed to tackle even the most intricate database-related tasks.
## Optimize Database Performance and Maintain Data Integrity
In addition to sharpening your SQL coding skills, the course will also delve into best practices for improving database performance and ensuring data integrity. You'll learn techniques for optimizing your MySQL code, as well as strategies for maintaining data quality and consistency in your applications.
## Become a SQL Problem-Solving Powerhouse
By the end of the 'MySQL Practice Challenges' course, you'll emerge as a confident and versatile SQL problem-solver. You'll be equipped with the knowledge and skills to tackle a wide range of MySQL challenges, demonstrating your expertise and standing out in the job market or as a freelance developer.
## Unlock Your Full Potential
Invest in your professional growth and [enroll in the 'MySQL Practice Challenges' course](https://labex.io/courses/mysql-practice-challenges) today. Elevate your MySQL mastery, enhance your problem-solving abilities, and position yourself as a sought-after SQL expert in the dynamic world of database management.
## Empowering Learners with Hands-On Experiences and AI-Driven Support
At the heart of LabEx lies its commitment to providing an immersive and interactive learning environment for aspiring programmers. Each course on the platform is accompanied by a dedicated Playground, where learners can put their newfound knowledge into practice and hone their skills in a real-world setting.
Recognizing the needs of beginners, LabEx offers meticulously crafted, step-by-step tutorials that guide learners through the learning process. These tutorials are designed to be user-friendly and intuitive, with built-in automated verification mechanisms that provide timely feedback on the learner's progress. This ensures that learners can track their understanding and make adjustments as they progress.
To further enhance the learning experience, LabEx has integrated an AI-powered learning assistant that offers a range of support services. From providing code corrections and explanations to clarifying conceptual doubts, this intelligent assistant empowers learners to overcome challenges and deepen their comprehension of the subject matter. With this innovative approach, LabEx aims to create a learning environment that is both engaging and effective, enabling learners to unlock their full potential as aspiring programmers.
---
## Want to Learn More?
- 🌳 Explore [20+ Skill Trees](https://labex.io/learn)
- 🚀 Practice Hundreds of [Programming Projects](https://labex.io/projects)
- 💬 Join our [Discord](https://discord.gg/J6k3u69nU6) or tweet us [@WeAreLabEx](https://twitter.com/WeAreLabEx) | labby |
1,922,544 | 100 Days of Cloud: Day 3 - Dockerizing a Go App for Dita Daystar (Apologies for the Delay!) | Hey everyone, I'm writing to apologize for the late submission for Day 3 of the 100 Days of Cloud... | 0 | 2024-07-13T17:27:10 | https://dev.to/tutorialhelldev/100-days-of-cloud-day-3-dockerizing-a-go-app-for-dita-daystar-apologies-for-the-delay-1hgi | Hey everyone,
I'm writing to apologize for the late submission for Day 3 of the 100 Days of Cloud challenge. I ran into some unexpected roadblocks, but I'm here now to conquer Docker and document the process for you all!
Today, we'll be diving into Docker and how to use it to containerize a Go application for our school club, Dita Daystar,my UNI.They have given me permission to document this whole process as a way to learn. Buckle up, and let's get started!
What is Docker and Why Do We Need It?
Imagine a world where your applications are self-contained packages that include everything they need to run – code, libraries, and configurations. That's the magic of Docker! Docker containers are like little virtual machines that isolate your application from the underlying system. This isolation ensures consistent behavior regardless of the environment, making your application more portable and reliable.
Here are some key benefits of using Docker:
Portability: Docker containers run consistently on any system with Docker installed, making your application deployment a breeze across different environments.
Isolation: Containers isolate applications from each other and the underlying system, preventing conflicts and ensuring a clean running environment.
Reproducibility: Once you define a Dockerfile (a recipe for building your container), you can be sure your application will run the same way everywhere.
Scalability: Spinning up new Docker containers is quick and easy, allowing you to scale your application up or down as needed.
Creating a Dockerfile: Step-by-Step
Now that we understand the power of Docker, let's see how to create a Dockerfile to containerize our Go application for Dita Daystar:
Base Image: We start by specifying the base image using the FROM instruction. In our case, we'll use the official golang:latest image, which provides a ready-made environment for building and running Go applications.
Copying Application Code: The COPY instruction is used to copy our application code from the current directory (".") to the /app/ directory within the container. This places our code in a designated location within the container filesystem.
Setting the Working Directory: We use the WORKDIR instruction to set the working directory for any subsequent commands within the Dockerfile. Here, we're setting it to /app/, which is where our application code resides.
Dependency Management: The RUN instruction allows us to execute commands within the container build process. We'll use this to run go mod tidy, which ensures our project has the necessary dependencies and cleans up any unused dependencies.
Defining the Command: Finally, the CMD instruction specifies the command that will be executed when the container starts. In our case, we're instructing the container to run our Go application using go run main.go. This will execute our main Go program upon container startup.
Here's the complete Dockerfile we've built:
Dockerfile
`FROM golang:latest
COPY . /app/
WORKDIR /app
RUN go mod tidy
CMD ["go" "run" "cmd/main.go"]`
Application Functionality (and Tomorrow's Debugging Challenge!)
Our Go application for Dita Daystar is ready to be containerized! However, there's a catch – it won't connect to a Postgres database yet. That's the challenge for tomorrow! We'll be debugging the connection issue and ensuring our application interacts seamlessly with Postgres within the container.
Possible Fixes for Connecting to Postgres:
There are a couple of reasons why your container might not be connecting to Postgres. Here are a few things to check:
Postgres Configuration: Ensure your Go application code has the correct connection details for your Postgres database. Double-check the host, port, username, and password within your code.
Network Connectivity: Verify that your container can reach the Postgres database. You might need to configure your Docker network to allow communication between the container and the Postgres instance.
Postgres Service: Make sure the Postgres service is running and accessible on the host machine where your Docker container is deployed.
By troubleshooting these potential issues, we should be able to get our Go application talking to Postgres within the container.
Let's try debugging the connection:
I was thinking I should double-check the connection details (host, port, username, password) in my Go application code to make sure they match my Postgres database configuration.
I could also try to ping the Postgres host from within the container to verify network connectivity.
Finally, I'll check if the Postgres service is up and running. | tutorialhelldev | |
1,922,545 | Understanding Dependencies in Node.js Projects | Understanding Dependencies in Node.js Projects When working on a Node.js project, managing... | 0 | 2024-07-13T17:27:48 | https://dev.to/tushar_pal/understanding-dependencies-in-nodejs-projects-44i3 | webdev, beginners, basic, javascript |
# Understanding Dependencies in Node.js Projects
When working on a Node.js project, managing dependencies is a crucial aspect that ensures your project runs smoothly. Dependencies are the libraries or packages your project needs to function. There are two main types of dependencies you should be aware of: devDependencies and normal dependencies.
## Types of Dependencies
### DevDependencies
These are the packages required only during the development phase. They are not needed in the production environment. For example, tools like parcel, webpack, or babel, which help in building or bundling your project, are usually listed as devDependencies.
Here's an example of how to define a devDependency in your `package.json` file:
```json
"devDependencies": {
"parcel": "^2.8.3"
}
```
### Normal Dependencies
These are the packages that your project needs in both development and production environments. Examples include frameworks like React, libraries for making HTTP requests, or any other code that your application relies on to run.
## Understanding Versioning Symbols
In the `package.json` file, you might notice symbols like `^` or `~` before the version numbers. These symbols are used to specify version ranges:
- **Caret (`^`)**: This symbol allows updates to minor versions. For example, `"parcel": "^2.8.3"` means any version from `2.8.3` to less than `3.0.0` is acceptable.
- **Tilde (`~`)**: This symbol allows updates to patch versions. For example, `"parcel": "~2.8.3"` means any version from `2.8.3` to less than `2.9.0` is acceptable.
## package.json and package-lock.json
Both `package.json` and `package-lock.json` are essential for managing dependencies in a Node.js project, but they serve different purposes:
- **package.json**: This file lists the dependencies your project needs and can include version ranges (`^` or `~`).
- **package-lock.json**: This file locks down the exact versions of each dependency, ensuring that every time you or someone else installs the project, the same versions are used.
## Understanding the Configuration and Node Modules
The `package.json` file can be seen as part of your project's configuration, specifying which packages are needed and their respective versions. The `node_modules` folder is like a database where all these packages are installed.
## Transitive Dependencies
Dependencies can have their own dependencies, creating a chain known as transitive dependencies. For example, Parcel might depend on other packages, and those packages might depend on even more packages. This chain is automatically managed for you, ensuring that all necessary packages are installed.
---
I hope this gives you a clearer understanding of how dependencies work in Node.js projects. Managing these correctly ensures your project runs efficiently and as expected, both during development and in production. | tushar_pal |
1,922,547 | Simple yet powerful react table component | Simple yet Powerful React Table Component In the ever-evolving landscape of front-end... | 0 | 2024-07-13T17:46:59 | https://dev.to/abdoseadaa/simple-yet-powerful-react-table-component-1inm | react, table, gadwal, frontend | ## Simple yet Powerful React Table Component
In the ever-evolving landscape of front-end development, having efficient and customizable components is crucial for building robust applications. Today, I'm excited to introduce "Gadwal," a simple yet powerful React table component that can enhance your data presentation effortlessly.
### Features
Gadwal stands out with the following features:
- Customizable Columns: Define the structure and content of your table with ease.
- Custom Rendering for Each Cell: Tailor the display of data in each cell to suit your needs.
- Tailwind CSS Support: Seamlessly integrate with Tailwind CSS for consistent styling.
- open source
## Usage
```tsx
import React from 'react';
import Table from 'gadwal';
const data = [
{
id: 1,
name: "Leanne Graham",
username: "Bret",
email: "oqkz9@example.com",
website: "hildegard.org",
phone: "1-770-736-8031 x56442",
company: {
name: "Romaguera-Crona",
catchPhrase: "Multi-layered client-server neural-net",
bs: "harness real-time e-markets",
},
}
];
const table = [
{ header: "id", name: "id", size: 2 },
{ header: "name", name: "name", size: 5 },
{ header: "email", name: "email", size: 5 },
{ header: "website", name: "website", size: 4 },
{ header: "phone", name: "phone", size: 4 },
{ header: "company", name: "company", size: 4, custom: (d) => d.company.name },
];
function App() {
return (
<div className="flex w-full">
<Table data={data} table={table} />
</div>
);
}
export default App;
```
## output
## it can do more complex tables
```tsx
import Table, { GadwalRow } from 'gadwal';
import { teammates, TeamMatesSchema } from './data.test';
import { _date } from '@helpers/date.helpers';
const userStatus = {
"invited" : <div className='text-[#063EF8] bg-[#063EF8]/10 w-fit px-3 py-1 rounded-md '> invited</div> ,
"active" : <div className='text-[#00A774] bg-[#00A774]/10 w-fit px-3 py-1 rounded-md '> active</div> ,
"inactive" : <div className='text-[#A70027] bg-[#A70027]/10 w-fit px-3 py-1 rounded-md '> inactive</div>
}
export default function Test() {
const table: GadwalRow<TeamMatesSchema>[] = [
{ header : "email" , name : "email" , size : 7, custom : d =>{
return <div className='flex items-center'>
<div className="w-[50px] h-[50px] rounded-full overflow-hidden mr-2">
<img src="https://images.pexels.com/photos/220453/pexels-photo-220453.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1" alt="profile" className="w-full h-full rounded-full object-cover" />
</div>
<div className="flex-1">
<p className="capitalize mb-0 text-black">abdelrahman seada</p>
<p className="capitalize mb-0">{d.email}</p>
</div>
</div>
} },
{ header : "status" , name : "status" , size : 4 , custom : d => userStatus[d.status] },
{ header : "role" , name :"type" , size : 4 , custom : d => <span className='capitalize'>{d.type.split(":")[1]}</span> },
{ header : "invited date" , name : "updated_at" , size : 4 , custom : d => _date(d.updated_at).local() }
];
return (
<Table
data={teammates}
table={table}
bodyProps={{ className : "border-b-[1px] items-center h-[90px] !p-0" }}
headerProps={{ className : "border-b-[1px] items-center cap h-[90px]" }}
fixedHeight={false}
/>
)
}
```
### output table
## typescript support
if we have an interface of our data like the following
```ts
export interface TeamMatesSchema {
status: "invited" | "active" | "inactive";
user_name: string;
_id: string;
type: string;
email: string;
updated_at: string;
}
```
using Generic GadwalRow will help you to know what is the data looks like in the name key (which should match the data key between table and api data to display it)
```ts
GadwalRow<TeamMatesSchema>[]
```
also for custom cell rendering
## props
| props | usage |required | default |
| ----------------- | ------------------------------------------------------------------ | --------- |---------|
| data | table data that is going to be rendred| true | -|
| table | coulums of the table each represents a cell | true| - |
| fixedHeight | to force each table row to a fixed height (50px) | false | true |
| animated | animate table content | false | false |
| stripped | make table rows stripped | false | true |
| bodyProps | to pass custom styles , classes , ...etc all div attributes to each row of data | false | {} |
| headerProps | to pass custom styles , classes , ...etc all div attributes to only table head | false | {} |
| bodyCellProps | to pass custom styles , classes , ...etc all div attributes to each row cells of data | false | {} |
| headerCellProps | to pass custom styles , classes , ...etc all div attributes to only table head cells | false | {} |
## notes
with props bodyProps, headerProps, bodyCellProps, headerCellProps you can pass any kind of attributes that could be passed to a normal html div element for the whole row (bodyProps) or each cell in the row (bodyCellProps) also for table header (headerProps) or each cell in the header (headerCellProps) , attributes like classes id onClick and and many more...
## and many more it's up to your creativity and imaginations
more about installation and configuration on npm gadwal page [gadwal on npm](https://www.npmjs.com/package/gadwal?activeTab=readme) | abdoseadaa |
1,922,548 | Introducing WeedX.io: A Comprehensive Platform for the Cannabis Industry | Hello Dev.to community, I'm excited to share with you our latest project at Selnox Infotech Pvt Ltd... | 0 | 2024-07-13T17:49:18 | https://dev.to/sandeep_kourav_bab12bd1bc/introducing-weedxio-a-comprehensive-platform-for-the-cannabis-industry-22nd | weedx, cannabis | Hello Dev.to community,
I'm excited to share with you our latest project at Selnox Infotech Pvt Ltd - [WeedX.io](https://weedx.io) . 🚀
What is WeedX.io?
WeedX.io is a robust platform designed to cater to the diverse needs of the cannabis industry. Our goal is to streamline the connection between dispensaries, delivery services, and customers, all in one place.
Key Features:
Dispensary Listing: Find local dispensaries with ease.
Delivery Listing: Discover delivery services in your area.
Brand Listing: Explore various cannabis brands and their products.
Order Placement: Customers can place orders for delivery or pick-up.
Location-Based Services: Get personalized recommendations based on your location.
Our Journey
At [Selnox Infotech](https://selnox.com/), we are committed to leveraging technology to simplify and enhance the cannabis business ecosystem. WeedX.io represents our vision of creating a seamless experience for both businesses and consumers in the cannabis industry.
Get Involved
We'd love to hear your thoughts and feedback on WeedX.io. If you're interested in learning more or have any questions, feel free to comment below or reach out to us directly.
Thank you for your support!
Best regards,
sandeep kourav
Founder & CEO, Selnox Infotech Pvt Ltd
---
Feel free to check out WeedX.io at [https://weedx.io](https://weedx.io) and explore what we have to offer!
| sandeep_kourav_bab12bd1bc |
1,922,549 | Power Up Your Earnings with These Telegram Projects | The Web3 revolution is democratizing finance, offering exciting money-making opportunities for... | 0 | 2024-07-13T17:56:10 | https://dev.to/bujji/power-up-your-earnings-with-these-telegram-projects-2673 | beginners, airdrop, blockchain, bitcoin | The Web3 revolution is democratizing finance, offering exciting money-making opportunities for everyone. If you're a budding developer eager to get your feet wet in the crypto space, look no further than Telegram.
This platform has emerged as a breeding ground for innovative projects, particularly in the "tap-to-earn" realm. Remember the phenomenal success of Notcoin? This project launched on Telegram, allowing users to passively earn tokens through simple taps. Upon listing, Notcoin skyrocketed, transforming many early participants into millionaires.
Inspired by Notcoin's success, a wave of new projects has flooded Telegram, each vying for your attention. To help you navigate this dynamic landscape, here are 7 top contenders with strong earning potential:
# **Hamster Kombat**
Hamster Kombat capitalizes on the immense popularity of Telegram mining bots. Boasting over 51 million Telegram subscribers, 30 million+ YouTube followers, and 11 million+ Twitter followers, this project is poised to be a major player. With an upcoming July launch, joining early could be your ticket to significant rewards.
If you don’t want to miss the tide, consider [**Kombat**](https://t.me/hAmster_kombat_bot/start?startapp=kentId6270913166) as well.
REMEMBER, the steps to joining this airdrop and the (following) remain the same.
[Start here](https://t.me/hAmster_kombat_bot/start?startapp=kentId6270913166) 👈
So, let me save your precious time by not repeating the same steps over and over again.
# Tapswap
Tapswap is another prominent tap-to-earn game on Telegram, attracting over 20 million users. Earning is straightforward - simply join and start accumulating coins.
[Start here 👈](https://t.me/tapswap_mirror_1_bot?start=r_6583655458)
# MemeFI
MemeFI stands out for its commitment to the community. A whopping 90% of the coin's supply is allocated to users, creating a strong incentive for early participation. Don't miss out on this potentially lucrative opportunity.
[Start here 👈](https://t.me/memefi_coin_bot?start=r_8daa21ae86)
# Blum
Blum boasts a team with experience at Binance, a leading cryptocurrency exchange. This pedigree inspires confidence and suggests a well-designed project. Dedicate just 3 minutes a day and witness the potential rewards.
[Start here 👈](https://t.me/memefi_coin_bot?start=r_8daa21ae86)
# Gamee
Gamee is the top gaming platform in telgram and it’s recently launched Watpoints and It’s has a huge chance that you can receive massive amount of dollar from here.
[Start here 👈](https://t.me/memefi_coin_bot?start=r_8daa21ae86)
# HOT
HOT, a trending Telegram wallet, offers a simple approach to earning. By joining and starting to mine HOT, you could be accumulating significant value for the future.
[Start here 👈](https://t.me/memefi_coin_bot?start=r_8daa21ae86)
# CEXIO
CEXIO is a rising star in the crypto exchange landscape, akin to Binance. With an upcoming launch, securing CEX points now could prove highly advantageous.
[Start here 👈](https://t.me/memefi_coin_bot?start=r_8daa21ae86)
| bujji |
1,922,550 | Mathematics for Machine Learning - Day 6 | Technically it takes the exact same steps... But we're not splitting hairs here. Also, I'm late :D ... | 27,993 | 2024-07-13T17:56:52 | https://www.pourterra.com/blogs/6 | machinelearning, learning, tutorial, beginners |
Technically it takes the exact same steps... But we're not splitting hairs here. Also, I'm late :D
## Row-Echelon Form (REF)
To know REF, a few definitions need to be established.
1. A leading coefficient / pivot: The first non-zero number in a row starting from the left
2. Staircase structure: Each following pivot is strictly on the right of the matrix. Meaning, if row 1 pivot is on a12, row 2 pivot cannot be at 21 or at a22, but it can skip a column, so a23 is fine.
### Rule
1. All rows that contain only zeros are at the bottom.
2. All rows containing at least one non-zero will form a staircase structure.
### Example
#### Not row echelon form:
Why? Because on the fourth and fifth row, the pivot is on the same column.
{% katex %}
\begin{pmatrix}
-2 & 4 & -2 & -1 & 4 \\\
0 & -8 & 3 & -3 & 1 \\\
0 & 0 & 6 & -1 & 1 \\\
0 & 0 & 0 & -3 & 4 \\\
0 & 0 & 0 & -3 & 1
\end{pmatrix}
{% endkatex %}
#### Row echelon form:
I'm happy to announce that these are in fact both row echelon form and upper triangle matrix!
The first example might be a non-brainer, but the second one is interesting because it's not the typical style of a `sound` matrix. But the pivots are on different and subsequent columns while having the zero row at the bottom, so both example 1 and 2 are row-echelon form!
{% katex %}
\text{Example 1} = \begin{pmatrix}
-2 & 4 & -2 & -1 & 4 \\\
0 & -8 & 3 & -3 & 1 \\\
0 & 0 & 2 & -1 & 1 \\\
0 & 0 & 0 & -3 & 4 \\\
0 & 0 & 0 & 0 & 1
\end{pmatrix} \\\
\text{Example 2} = \begin{pmatrix}
-2 & 4 & -2 & -1 & 4 \\\
0 & -8 & 3 & -3 & 1 \\\
0 & 0 & 2 & -1 & 1 \\\
0 & 0 & 0 & 0 & 4 \\\
0 & 0 & 0 & 0 & 0
\end{pmatrix}
{% endkatex %}
### Regarding Day 5
I was right!, REF is a upper triangle like in LU decomposition method Though there is a caveat when searching further and a few discussion forums online.
Upper triangle matrix can on be defined on square matrices, while row-echelon form does not, meaning, REF is only a upper triangle and vice versa on square matrices, not on rectangular (though there was a forum saying that they can be...)
## Reduced Row Echelon Form (RREF) / Row Canonical Form
### Rule
1. It's in REF (Meaning it needs to retain the rule of REF)
2. Every pivot is 1
### Explanation and difference between REF
It's... a simplified version of an REF, what's the main difference? After you've obtain a REF matrix, on each row you divide using elementary transformation based on the pivot.
Take the previous matrix as an example:
{% katex %}
\text{This is a REF} = \\\
\begin{array}{ccccc|c}
-2 & 4 & -2 & -1 & 4 & 0 \\\
0 & -8 & 3 & -3 & 1 & -2 \\\
0 & 0 & 2 & -1 & 1 & 1 \\\
0 & 0 & 0 & -3 & 4 & -2 \\\
0 & 0 & 0 & 0 & 1 & -2
\end{array} \\\
{% endkatex %}
But if you divide each row by it's pivot, it becomes:
{% katex %}
\text{This is a RREF} = \\\
\begin{array}{ccccc|c}
1 & -2 & 1 & \frac{1}{2} & -2 & 0 \\\
0 & 1 & \frac{3}{8} & -\frac{3}{8} & \frac{1}{8} & \frac{1}{4} \\\
0 & 0 & 1 & -\frac{1}{2} & \frac{1}{2} & \frac{1}{2} \\\
0 & 0 & 0 & 1 & -\frac{4}{3} & \frac{2}{3} \\\
0 & 0 & 0 & 0 & 1 & -2 \\\
\end{array} \\\
{% endkatex %}
Please keep in mind, the reason I use augmented matrix is to show that the result also change based on the division and not just the matrix itself!
### Now this is where the previous day comes in as well! Remember this matrix?
This is an example of a reduced row echelon matrix form in augmented matrix, with the non-transformed matrix being complicated, what we did was transforming it into an RREF.
{% katex %}
\begin{array}{ccccc|c}
1 & -2 & 1 & -1 & 1 & 0 \\\
0 & 0 & 1 & -1 & 3 & -2 \\\
0 & 0 & 0 & 1 & -2 & 1 \\\
0 & 0 & 0 & 0 & 0 & a + 1
\end{array}
{% endkatex %}
## Calculating Inverse
This is where I spent a lot of time on today, because I couldn't wrap my head around the concept, but fear not! I think I understand it correctly.
{% katex %}
\left[\begin{array}{c|c}
A & I
\end{array}\right] =
\left[\begin{array}{c|c}
I & A^{-1}
\end{array}\right]
{% endkatex %}
If you're confused, I feel you, basically what I'm going to show you and provide proof (from a non mathematician) regarding this concept.
### Let's start with an example!, then the proof.
#### Example:
Given:
{% katex %}
A = \begin{pmatrix}
4 & 2 & 2 \\\
3 & 1 & 2 \\\
2 & 1 & 2
\end{pmatrix}
{% endkatex %}
We create an augmented matrix with A on the left side and an identity matrix on the right.
{% katex %}
\left[\begin{array}{c|c}
A & I
\end{array}\right] =
\left[\begin{array}{ccc|ccc}
4 & 2 & 2 & 1 & 0 & 0 \\\
3 & 1 & 2 & 0 & 1 & 0 \\\
2 & 1 & 2 & 0 & 0 & 1
\end{array}\right]
{% endkatex %}
##### Step 1: Subtract R1 with R2
{% katex %}
\overset{R_1 - R_2 \rightarrow R_1}
{
\left[\begin{array}{ccc|ccc}
1 & 1 & 0 & 1 & -1 & 0 \\\
3 & 1 & 2 & 0 & 1 & 0 \\\
2 & 1 & 2 & 0 & 0 & 1
\end{array}\right]
}
{% endkatex %}
##### Step 2: Subtract R2 with R3
{% katex %}
\overset{R_2 - R_3 \rightarrow R_2}
{
\left[\begin{array}{ccc|ccc}
1 & 1 & 0 & 1 & -1 & 0 \\\
3 & 1 & 2 & 0 & 1 & 0 \\\
1 & 0 & 0 & 0 & 1 & -1
\end{array}\right]
}
{% endkatex %}
##### Step 3: Subtract R1 with R2
{% katex %}
\overset{R_1 - R_2 \rightarrow R_1}
{
\left[\begin{array}{ccc|ccc}
-2 & 0 & -2 & 1 & -2 & 0 \\\
3 & 1 & 2 & 0 & 1 & 0 \\\
1 & 0 & 0 & 0 & 1 & -1
\end{array}\right]
}
{% endkatex %}
##### Step 4: Swap R1 with R2
{% katex %}
\overset{R_1 \leftrightarrow R_2}
{
\left[\begin{array}{ccc|ccc}
1 & 0 & 0 & 0 & 1 & -1 \\\
0 & 1 & 0 & 1 & -2 & 1 \\\
2 & 1 & 2 & 0 & 0 & 1
\end{array}\right]
}
{% endkatex %}
##### Step 5: Subtract R3 with R2 and 2R1
{% katex %}
\overset{R_3 - R_2 - 2R_1 \rightarrow R_3}
{
\left[\begin{array}{ccc|ccc}
1 & 0 & 0 & 0 & 1 & -1 \\\
0 & 1 & 0 & 1 & -2 & 1 \\\
0 & 0 & 2 & -1 & 0 & 2
\end{array}\right]
}
{% endkatex %}
##### Step 6: Divide R3 by 2
{% katex %}
\overset{\frac{R3}{2} \rightarrow R_3}
{
\left[\begin{array}{ccc|ccc}
1 & 0 & 0 & 0 & 1 & -1 \\\
0 & 1 & 0 & 1 & -2 & 1 \\\
0 & 0 & 1 & -\frac{1}{2} & 0 & 1
\end{array}\right]
}
{% endkatex %}
#### Conclusion
{% katex %}
\left[\begin{array}{c|c}
I & A^{-1}
\end{array}\right] =
\left[\begin{array}{ccc|ccc}
1 & 0 & 0 & 0 & 1 & -1 \\\
0 & 1 & 0 & 1 & -2 & 1 \\\
0 & 0 & 1 & -\frac{1}{2} & 0 & 1
\end{array}\right]
{% endkatex %}
#### Proof
For those who are really curious on why this works, I've got you covered!. Let's dive even deeper inside this math for your curiosity and to justify myself spending hours on this that isn't even about machine learning anymore.
##### So, like before we have this augmented matrix
{% katex %}
\left[\begin{array}{c|c}
A & I
\end{array}\right]
{% endkatex %}
##### Our goal is to use elementary transformations to change A to I.
So it should look something like this:
{% katex %}
E_k E_{k-1} \cdots E_2 E_1 A = I
{% endkatex %}
With Ek, ..., E2, E1 being the transformations we did, so with the example I showed, we did 6 transformations that made A into I
P.S. That's why just for today I added steps :D
##### Then, on both sides, we multiply by inverse A
{% katex %}
E_k E_{k-1} \cdots E_2 E_1 AA^{-1} = IA^{-1}
{% endkatex %}
##### Remember the property of matrix and its inverse? We'll apply them here!
{% katex %}
AA^{-1} = I \\\
IA^{-1} = A^{-1}
{% endkatex %}
Making the equation into:
{% katex %}
E_k E_{k-1} \cdots E_2 E_1 I = A^{-1}
{% endkatex %}
##### Finally, we get the full formula
{% katex %}
E_k E_{k-1} \cdots E_2 E_1
\left[\begin{array}{c|c}
A & I
\end{array}\right] = \left[\begin{array}{c|c}
I & A^{-1}
\end{array}\right]
{% endkatex %}
Meaning that with elementary transformation we can inverse the matrix!
##### Side note:
###### I skipped a section called Minus-1 Trick, I didn't feel it gave anything to the solution given we can already answer the problem being given on the example with just the normal method, but it's should be called out :D
---
## Acknowledgement
I can't overstate this: I'm truly grateful for this book being open-sourced for everyone. Many people will be able to learn and understand machine learning on a fundamental level. Whether changing careers, demystifying AI, or just learning in general, this book offers immense value even for _fledgling composer_ such as myself. So, Marc Peter Deisenroth, A. Aldo Faisal, and Cheng Soon Ong, thank you for this book.
Source:
Deisenroth, M. P., Faisal, A. A., & Ong, C. S. (2020). Mathematics for Machine Learning. Cambridge: Cambridge University Press.
https://mml-book.com | pourlehommes |
1,922,551 | Introducing Cannabaze: Your Ultimate POS System for the Cannabis Industry | In the rapidly evolving cannabis industry, efficient and reliable management solutions are crucial... | 0 | 2024-07-13T17:58:07 | https://dev.to/sandeep_kourav_bab12bd1bc/introducing-cannabaze-your-ultimate-pos-system-for-the-cannabis-industry-5ehd | In the rapidly evolving cannabis industry, efficient and reliable management solutions are crucial for success. Enter [Cannabaze](https://cannabaze.com/), the ultimate Point of Sale (POS) system designed specifically for the cannabis business. Whether you’re running a dispensary, delivery service, or brand, Cannabaze is your go-to solution for streamlined operations and enhanced customer experiences.
Why Choose Cannabaze?
Tailored for the Cannabis Industry
Cannabaze is not just another POS system. It's built with the unique needs of the cannabis industry in mind. From compliance with regulatory requirements to managing inventory and sales, Cannabaze has you covered.
Seamless Integration
Integrate Cannabaze with your existing systems and workflows effortlessly. Whether you're using WeedX.io for dispensary listings or delivery services, Cannabaze syncs seamlessly to provide a unified and efficient operational experience.
Comprehensive Inventory Management
Stay on top of your stock with Cannabaze’s robust inventory management features. Track products in real-time, manage suppliers, and ensure you never run out of your best-selling items.
Enhanced Customer Experience
Cannabaze enables you to provide a superior customer experience with quick and easy transactions. Our user-friendly interface ensures that your staff can focus on what matters most – serving your customers.
Advanced Reporting and Analytics
Make informed business decisions with Cannabaze’s advanced reporting and analytics. Gain insights into sales trends, customer preferences, and inventory turnover to optimize your operations and increase profitability.
Secure and Compliant
Cannabaze prioritizes security and compliance. Our system is designed to meet the stringent regulatory requirements of the cannabis industry, ensuring that your business remains compliant while protecting sensitive customer data.
24/7 Support
Our dedicated support team is available around the clock to assist you with any issues or questions. We’re committed to ensuring that your Cannabaze experience is smooth and trouble-free.
Transform Your Cannabis Business with Cannabaze
In an industry where efficiency and reliability are key, Cannabaze stands out as the ultimate POS system. Simplify your operations, enhance your customer service, and grow your business with the power of Cannabaze. Join the ranks of successful cannabis businesses that trust Cannabaze for their point-of-sale needs.
Ready to take your cannabis business to the next level? Discover the Cannabaze difference today! | sandeep_kourav_bab12bd1bc | |
1,922,552 | RELIABLE-FAST AND GUARANTEED CYBER EXPERTISE HIRE PRO WIZARD GIlBERT RECOVERY | In 2020, amidst the economic fallout of the pandemic, I found myself unexpectedly unemployed and... | 0 | 2024-07-13T17:58:27 | https://dev.to/michael_harrell_30b677a5f/reliable-fast-and-guaranteed-cyber-expertise-hire-pro-wizard-gilbert-recovery-28i0 | In 2020, amidst the economic fallout of the pandemic, I found myself unexpectedly unemployed and turned to Forex trading in hopes of stabilizing my finances. Like many, I was drawn in by the promise of quick returns offered by various Forex robots, signals, and trading advisers. However, most of these products turned out to be disappointing, with claims that were far from reality. Looking back, I realize I should have been more cautious, but the allure of financial security clouded my judgment during those uncertain times. Amidst these disappointments, Profit Forex emerged as a standout. Not only did they provide reliable service, but they also delivered tangible results—a rarity in an industry often plagued by exaggerated claims. The positive reviews from other users validated my own experience, highlighting their commitment to delivering genuine outcomes and emphasizing sound financial practices. My journey with Profit Forex led to a net profit of $11,500, a significant achievement given the challenges I faced. However, my optimism was short-lived when I encountered obstacles trying to withdraw funds from my trading account. Despite repeated attempts, I found myself unable to access my money, leaving me frustrated and uncertain about my financial future. Fortunately, my fortunes changed when I discovered PRO WIZARD GIlBERT RECOVERY. Their reputation for recovering funds from fraudulent schemes gave me hope in reclaiming what was rightfully mine. With a mixture of desperation and cautious optimism, I reached out to them for assistance. PRO WIZARD GIlBERT RECOVERY impressed me from the start with their professionalism and deep understanding of financial disputes. They took a methodical approach, using advanced techniques to track down the scammers responsible for withholding my funds. Throughout the process, their communication was clear and reassuring, providing much-needed support during a stressful period. Thanks to PRO WIZARD GIlBERT RECOVERY's expertise and unwavering dedication, I finally achieved a resolution to my ordeal. They successfully traced and retrieved my funds, restoring a sense of justice and relief. Their intervention not only recovered my money but also renewed my faith in ethical financial services. Reflecting on my experience, I've learned invaluable lessons about the importance of due diligence and discernment in navigating the Forex market. While setbacks are inevitable, partnering with reputable recovery specialists like PRO WIZARD GIlBERT RECOVERY can make a profound difference. Their integrity and effectiveness have left an indelible mark on me, guiding my future decisions and reinforcing the value of trustworthy partnerships in achieving financial goals. I wholeheartedly recommend PRO WIZARD GIlBERT RECOVERY to anyone grappling with financial fraud or disputes. Their expertise and commitment to client satisfaction are unparalleled, offering a beacon of hope in challenging times. Thank you, PRO WIZARD GIlBERT RECOVERY, for your invaluable assistance in reclaiming what was rightfully mine. Your service not only recovered my funds but also restored my confidence in navigating the complexities of financial markets with greater caution and awareness.
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WhatsApp: +1 (516) 347‑9592 | michael_harrell_30b677a5f | |
1,922,553 | Be an Energy Radiator: Ignite Your Influence | In a world teeming with noise, the ability to shine is a superpower. To be an energy radiator is to... | 27,967 | 2024-07-13T18:37:16 | https://dev.to/rishiabee/be-an-energy-radiator-ignite-your-influence-48ke | leadership, leaders, motivational, strongteams | In a world teeming with noise, the ability to shine is a superpower. To be an energy radiator is to not just exist, but to illuminate. It's about captivating hearts, inspiring minds, and leaving an indelible mark.
## Why Be an Energy Radiator?
Being an energy radiator is more than a title; it's a strategic choice. It's about maximizing your potential, building authentic connections, and driving positive change. When you radiate energy, you:
- **Attract opportunities:** People gravitate towards enthusiasm and optimism.
- **Build a loyal following:** Your passion becomes contagious.
- **Drive innovation:** Your energy fosters a creative environment.
- **Overcome challenges:** A positive outlook builds resilience.
- **Inspire others:** Your light can ignite the spark in others.
## How to Be an Energy Radiator
### 1. Be Visible:
- **Step into the spotlight:** Don't shy away from opportunities to share your thoughts, ideas, or expertise.
- **Leverage technology:** Use social media, blogs, and podcasts to amplify your voice.
- **Network strategically:** Build relationships with people from diverse backgrounds.
> _Story: Alex, a budding entrepreneur, was hesitant to share her business idea. But after overcoming her fear and pitching at a startup event, she attracted investors and mentors._
### 2. Connect Deeply:
- **Build authentic relationships:** Focus on quality over quantity.
- **Practice empathy:** Understand and share the feelings of others.
- **Active listening:** Pay attention to what others are saying and feeling.
> _Story: Sarah, a customer service representative, turned a frustrated customer into a loyal advocate by genuinely listening to their concerns and finding a solution._
### 3. Explain Your Decisions:
- **Transparency builds trust:** Share your thought process behind decisions.
- **Seek feedback:** Value input from others.
- **Communicate clearly:** Use simple, understandable language.
> _Story: Mark, a team leader, increased employee morale by openly discussing the reasons behind a new project and involving the team in decision-making._
### 4. Encourage Your People:
- **Believe in their potential:** Offer support and encouragement.
- **Celebrate successes:** Recognize and reward achievements.
- **Provide constructive feedback:** Help them grow and improve.
> _Story: Olivia, a mentor, helped a young employee overcome self-doubt by highlighting their strengths and setting achievable goals._
### 5. Project Positivity:
1. **Cultivate optimism:** Focus on the bright side.
2. **Practice gratitude:** Appreciate what you have.
3. **Spread positivity:** Be a source of light for others.
> _Story: Ethan, a sales representative, turned a challenging sales call into a positive experience by focusing on solutions and finding common ground._
### 6. Watch Your Language:
- **Choose words wisely:** Use language that inspires and motivates.
- **Avoid negativity:** Eliminate pessimistic language.
- **Practice effective communication:** Be clear and concise.
> _Story: Maya, a public speaker, transformed a nervous audience into an engaged crowd by using powerful, uplifting language._
### 7. Celebrate Effort as Well as Success:
- **Recognize hard work:** Acknowledge dedication and perseverance.
- **Learn from failures:** View setbacks as opportunities for growth.
- **Build a culture of encouragement:** Foster a supportive environment.
> _Story: Riley, a coach, helped a struggling athlete regain confidence by emphasizing their improvement and progress._
### 8. Be Approachable:
- **Openness invites connection:** Be receptive to others.
- **Active engagement:** Participate in conversations and activities.
- **Show genuine interest:** Care about people and their experiences.
> _Story: Ben, a new employee, quickly integrated into the team by being friendly, inclusive, and willing to help._
### 9. Keep Perspective:
- **Maintain balance:** Prioritize well-being and relationships.
- **Learn from challenges:** Grow through adversity.
- **Stay grounded:** Remember your roots and values.
> _Story: Anya, a high-achieving executive, prevented burnout by taking time for relaxation, hobbies, and spending quality time with loved ones._
---
Remember, being an energy radiator is a journey, not a destination. Consistent effort and a genuine desire to uplift others are key. By embodying these principles, you can create a ripple effect of positivity that transforms lives and communities.
---
## Leaders Who Inspire
**Nelson Mandela:** His unwavering belief in equality and forgiveness, coupled with his ability to unite a nation, made him a beacon of hope.
**Martin Luther King Jr.:** A powerful orator and civil rights leader, his dream of a world without racial discrimination continues to inspire.
**Oprah Winfrey:** Her journey from hardship to media mogul is a testament to resilience and the power of empathy.
## Artists and Entertainers Who Captivate
**Beyoncé:** Known for her powerful performances and empowering lyrics, Beyoncé is a role model for many.
**Steve Jobs:** His visionary leadership and ability to transform technology into art made him an iconic figure.
**Lady Gaga:** Her fearless expression of individuality and advocacy for mental health have resonated with millions.
##Everyday Heroes
**The local volunteer firefighter:** Risking their lives to protect their community, they embody courage and selflessness.
**The dedicated teacher:** Inspiring young minds and shaping the future, they are the architects of tomorrow.
**The community organizer:** Bringing people together to address shared challenges, they create a sense of belonging.
---
## Common Traits of Energy Radiators
These individuals, from world leaders to everyday heroes, share several key characteristics:
- **Passion:** They are deeply committed to their cause or craft.
- **Vision:** They have a clear sense of purpose and direction.
- **Empathy:** They connect with others on a human level.
- **Resilience:** They overcome obstacles with determination.
- **Authenticity:** They are true to themselves.
---
# Embarking on the journey of becoming an energy radiator is exciting! | rishiabee |
1,922,557 | What is OpenGL, WebGL, Three.js, and WebXR? | OpenGL OpenGL (Open Graphics Library) is a cross-language, cross-platform application... | 0 | 2024-07-13T18:08:01 | https://dev.to/kda/what-is-opengl-webgl-threejs-and-webxr-2hmn | webdev, webgraphics, beginners |
## **OpenGL**
OpenGL (Open Graphics Library) is a cross-language, cross-platform application programming interface (API) for rendering 2D and 3D vector graphics. The API is typically used to interact with a graphics processing unit (GPU), to achieve hardware-accelerated rendering. It is widely used in video games, CAD, virtual reality, scientific visualization, and more.
Resources:
[OpenGL](https://www.opengl.org/)
## **WebGL**
WebGL (Web Graphics Library) is a JavaScript API for rendering interactive 2D and 3D graphics within any compatible web browser without the use of plug-ins. It is based on OpenGL ES (a subset of OpenGL for embedded systems).
Major browser vendors Apple (Safari), Google (Chrome), Microsoft (Edge), and Mozilla (Firefox) are members of the WebGL Working Group.
Resources:
[WebGL](https://www.khronos.org/webgl/)
[WebGL: 2D and 3D graphics for the web](https://developer.mozilla.org/en-US/docs/Web/API/WebGL_API)
## **Three.js**
Three.js is a popular JavaScript library that simplifies the creation and display of 3D graphics in a web browser using WebGL. It supports VR and AR, offers cross-browser compatibility via WebGL, provides extensive tools for adding materials, textures, and animations, and allows for the integration of models from other 3D modeling software.
**Key Features**
- Scene Graph: It uses a scene graph structure, allowing developers to create and manage 3D objects, cameras, lights, and other elements in a hierarchical manner.
- Geometries and Materials: Three.js provides a variety of built-in geometries (e.g., cubes, spheres, planes) and materials (e.g., basic, lambert, phong, standard) that can be easily customized and combined.
- Animation: The library supports animations, including skeletal animations, morph targets, and keyframe animations, making it suitable for creating animated 3D content.
- Shaders and Post-Processing: Three.js allows the use of custom shaders written in GLSL and supports post-processing effects such as bloom, depth of field, and motion blur.
Resources:
[Three.js](https://threejs.org/)
[Fundamentals](https://threejs.org/manual/#en/fundamentals)
[Discover threejs](https://discoverthreejs.com/book/)
Other graphic libraries:
[Babylon.js](https://www.babylonjs.com/ )
[A-Frame](https://aframe.io/)
## **WebXR**
WebXR (Web Extended Reality) is a web standard that provides support for both virtual reality (VR) and augmented reality (AR) experiences directly in web browsers.
Resources:
[WebXR](https://immersiveweb.dev/)
[Fundamentals of WebXR](https://developer.mozilla.org/en-US/docs/Web/API/WebXR_Device_API/Fundamentals)
## **React Three Fiber (R3F)**
React Three Fiber (R3F) is a powerful library that brings the capabilities of Three.js into the React ecosystem.
Resources:
[R3F documentation](https://docs.pmnd.rs/react-three-fiber/getting-started/introduction)
[Building an interactive 3D event badge with React Three Fiber](https://vercel.com/blog/building-an-interactive-3d-event-badge-with-react-three-fiber)
**Conclusion**
OpenGL is a powerful API for creating high-performance graphics applications across various domains. WebGL extends these capabilities to the web, enabling rich, interactive graphics directly in browsers and integrating seamlessly with HTML5. Three.js further simplifies web-based 3D graphics creation with its extensive features, making it a popular choice for both simple visualizations and complex animations. WebXR brings VR and AR capabilities to the web, allowing developers to build immersive, cross-device experiences. React Three Fiber combines Three.js with React's declarative nature, making 3D graphics development more accessible and manageable in React applications. | kda |
1,922,559 | The Future of the MERN Stack: A Bright Horizon for Web Development | The MERN stack, comprising MongoDB, Express.js, React, and Node.js, has gained immense popularity in... | 0 | 2024-07-13T18:08:58 | https://dev.to/shubham_kolkar/the-future-of-the-mern-stack-a-bright-horizon-for-web-development-1h27 | The MERN stack, comprising MongoDB, Express.js, React, and Node.js, has gained immense popularity in the web development community. As an end-to-end JavaScript solution, it offers a streamlined and efficient approach to building modern web applications. Looking ahead, several trends and technological advancements suggest a promising future for the MERN stack. Here, we explore the factors contributing to its sustained relevance and potential growth in the coming years.
## 1. JavaScript Dominance
JavaScript continues to be the backbone of web development, and the MERN stack leverages its full potential. With the entire stack built around JavaScript, developers benefit from a consistent and coherent development experience. This uniformity reduces the cognitive load, making it easier for developers to switch between front-end and back-end tasks. As JavaScript evolves and new features are introduced, the MERN stack will naturally integrate these advancements, maintaining its cutting-edge status.
## 2. Growing Popularity of Single-Page Applications (SPAs)
Single-page applications provide a seamless and responsive user experience by loading a single HTML page and dynamically updating content as users interact with the app. React, the front-end component of the MERN stack, excels in building SPAs due to its virtual DOM and component-based architecture. As businesses increasingly demand SPAs for their superior performance and user experience, the MERN stack is well-positioned to meet this growing need.
## 3. Scalability and Flexibility
MongoDB, the NoSQL database in the MERN stack, offers flexibility and scalability that traditional relational databases struggle to match. Its schema-less nature allows developers to adapt to changing requirements without major disruptions. This adaptability is crucial for startups and enterprises alike, as it enables rapid iteration and scaling of applications. Node.js, with its event-driven architecture, further enhances the stack’s scalability by efficiently handling concurrent connections, making the MERN stack ideal for high-traffic applications.
## 4. Microservices and Serverless Architectures
The shift towards microservices and serverless architectures aligns perfectly with the strengths of the MERN stack. Node.js is particularly suited for building microservices due to its lightweight and non-blocking I/O model. By decomposing applications into smaller, independent services, developers can achieve greater modularity and maintainability. Furthermore, serverless platforms like AWS Lambda and Google Cloud Functions support Node.js, allowing MERN developers to build and deploy scalable serverless functions effortlessly.
## 5. Community and Ecosystem Support
The MERN stack benefits from a vibrant and active community. Open-source contributions, comprehensive documentation, and a wealth of online resources ensure that developers have ample support and tools at their disposal. The continuous growth of npm (Node Package Manager) enriches the ecosystem with reusable libraries and modules, accelerating development processes and promoting best practices.
## 6. Corporate Adoption and Job Market Demand
Leading tech companies, including Netflix, Airbnb, and Uber, have embraced the MERN stack for its efficiency and performance. This corporate adoption drives the demand for MERN stack developers in the job market. As more companies recognize the benefits of a full-stack JavaScript solution, the demand for skilled MERN developers is expected to rise, ensuring a steady stream of career opportunities for those proficient in the stack.
## 7. Future Innovations and Integration
The future holds exciting possibilities for the MERN stack as new tools and technologies emerge. Integration with AI and machine learning frameworks, enhanced performance through WebAssembly, and advancements in web standards will further elevate the capabilities of the MERN stack. Additionally, improvements in developer tooling, such as better debugging and testing utilities, will streamline the development process, making the stack even more attractive to developers.
## Conclusion
The MERN stack’s future is undoubtedly bright, driven by the continuous evolution of JavaScript, the growing demand for SPAs, and the stack’s inherent scalability and flexibility. With strong community support, corporate adoption, and an expanding ecosystem, the MERN stack is set to remain a cornerstone of modern web development. As new innovations and technologies emerge, the MERN stack will adapt and thrive, empowering developers to build robust and dynamic web applications well into the future. | shubham_kolkar | |
1,922,560 | Let’s VPN: Secure and Fast Internet Access | In today’s digital age, online security and privacy have become paramount concerns for internet... | 0 | 2024-07-13T18:11:53 | https://dev.to/fasts_vpn/lets-vpn-secure-and-fast-internet-access-5b73 | networking, vpn |
In today’s digital age, online security and privacy have become paramount concerns for internet users. With increasing cyber threats and the need to access content without geographical restrictions, Virtual Private Networks (VPNs) have emerged as essential tools. One such reliable and efficient VPN service is Let’s VPN. This article delves into the features, benefits, and download process of Let’s VPN, also known as [快连](https://www.fastsvpn.com/) in Chinese.快连
What is Let’s VPN?
Let’s VPN is a robust VPN service designed to provide users with a secure, fast, and unrestricted internet experience. It encrypts your internet connection, ensuring that your online activities remain private and protected from prying eyes. Whether you’re looking to bypass geographical restrictions, safeguard your personal information, or simply browse the internet anonymously, Let’s VPN is a great choice.[快连下载](https://www.fastsvpn.com/)
Key Features of Let’s VPN
1. High-Speed Connectivity
One of the standout features of Let’s VPN is its high-speed connectivity. Unlike many VPNs that slow down your internet connection, Let’s VPN is optimized for speed, allowing you to stream videos, play online games, and download files without interruption.[快连vpn](https://www.fastsvpn.com/)
2. Enhanced Security and Privacy
Let’s VPN employs advanced encryption protocols to secure your data. This ensures that your personal information, such as passwords and credit card details, are protected from hackers and other malicious entities. Additionally, it masks your IP address, making your online activities virtually untraceable.[快连vpn下载](https://www.fastsvpn.com/)
3. Easy-to-Use Interface
User-friendliness is a hallmark of Let’s VPN. The application features a straightforward and intuitive interface, making it easy for users of all technical levels to navigate and use. With just a few clicks, you can connect to a secure server and start browsing safely.[快连官方](https://www.fastsvpn.com/)
4. Wide Range of Servers
Let’s VPN boasts a vast network of servers located in various countries around the globe. This extensive server network allows users to bypass geographical restrictions and access content from different regions. Whether you want to watch a TV show that’s only available in another country or access a website that’s blocked in your location, Let’s VPN has got you covered.[快连官方下载](https://www.fastsvpn.com/)
5. No-Logs Policy
Privacy is a critical aspect of any VPN service, and Let’s VPN takes this seriously. The service adheres to a strict no-logs policy, meaning that it does not track or store your browsing activities. This commitment to privacy ensures that your online behavior remains confidential.letsvpn
How to Download Let’s VPN (快连官方下载)
Downloading and installing Let’s VPN is a simple process. Follow these steps to get started:
Visit the Official Website: Go to the official Let’s VPN website to download the application. Ensure that you are downloading from a legitimate source to avoid any security risks.letsvpn download
Choose Your Platform: Let’s VPN is available for multiple platforms, including Windows, macOS, Android, and iOS. Select the appropriate version for your device.
Download and Install: Click the download button and follow the on-screen instructions to install the application on your device.
Launch the Application: Once installed, open Let’s VPN and sign up for an account if you don’t already have one. If you’re a returning user, simply log in with your credentials.
Connect to a Server: Select a server from the list and click the connect button. You are now ready to enjoy a secure and unrestricted internet experience.
Conclusion
In an era where online privacy and security are of utmost importance, Let’s VPN stands out as a reliable and efficient solution. With its high-speed connectivity, robust security features, user-friendly interface, and extensive server network, Let’s VPN provides a seamless and secure internet experience. Whether you’re looking to protect your personal information, bypass geographical restrictions, or simply browse the internet anonymously, Let’s VPN is an excellent choice. Download Let’s VPN today and take control of your online privacy and security. | fasts_vpn |
1,922,561 | Attention Mechanisms in Deep Learning: Unlocking New Capabilities | Attention mechanisms have become a cornerstone of modern deep learning architectures, particularly in... | 27,893 | 2024-07-13T18:13:33 | https://dev.to/monish3004/attention-mechanisms-in-deep-learning-unlocking-new-capabilities-5hho | beginners, ai, learning, machinelearning | Attention mechanisms have become a cornerstone of modern deep learning architectures, particularly in natural language processing (NLP) and computer vision. Introduced as a solution to the limitations of traditional sequence models, attention mechanisms allow models to dynamically focus on different parts of input data, leading to significant improvements in performance and flexibility. This blog explores the fundamentals, types, and applications of attention mechanisms in deep learning.
**Why Attention Mechanisms?**
Traditional models like RNNs and CNNs have limitations in handling long-range dependencies and varying importance of input elements. Attention mechanisms address these issues by enabling models to weigh the relevance of different parts of the input data dynamically. This ability to focus selectively allows for more nuanced and effective processing of complex data.
**Fundamentals of Attention Mechanisms**
At its core, an attention mechanism computes a weighted sum of input elements, where the weights represent the importance of each element. The attention process can be summarized in three steps:
1. **Scoring**: Calculate a score that represents the relevance of each input element with respect to the current task.
2. **Weighting**: Apply a softmax function to convert the scores into probabilities, ensuring they sum to one.
3. **Summation**: Compute a weighted sum of the input elements based on the probabilities.
The general formula for the attention mechanism is:
**Types of Attention Mechanisms**
**1.Additive (Bahdanau) Attention**
Introduced by Bahdanau et al., additive attention uses a feed-forward network to compute the alignment scores. It is particularly useful in sequence-to-sequence models for machine translation.
**2.Dot-Product (Luong) Attention**
Proposed by Luong et al., dot-product attention computes the alignment scores using the dot product between the query and key vectors. It is computationally more efficient than additive attention.
**3.Scaled Dot-Product Attention**
Scaled dot-product attention, used in transformers, scales the dot products by the square root of the key dimension to prevent the gradients from vanishing or exploding.
**4.Self-Attention**
Self-attention, or intra-attention, allows each element of a sequence to attend to all other elements. It is the backbone of the transformer architecture and is crucial for capturing dependencies in sequences.
**5.Multi-Head Attention**
Multi-head attention involves using multiple sets of queries, keys, and values, allowing the model to attend to information from different representation subspaces. It enhances the ability to focus on various parts of the input.
**Applications of Attention Mechanisms**
**1.Natural Language Processing**
- **Machine Translation**: Attention mechanisms allow translation models to focus on relevant words in the source sentence.
- **Text Summarization**: They help models identify key sentences and phrases to generate coherent summaries.
- **Question Answering**: Attention helps models find the answer span in a context paragraph.
**2.Computer Vision**
- **Image Captioning**: Attention mechanisms can highlight important regions of an image when generating descriptive captions.
- **Object Detection**: They help models focus on relevant parts of the image to detect and classify objects.
**3.Speech Recognition**
Attention mechanisms enhance the ability of models to focus on relevant parts of an audio signal, improving transcription accuracy.
**4.Healthcare**
In medical imaging, attention mechanisms can help models focus on critical areas, such as tumors or lesions, improving diagnostic accuracy.
**Conclusion**
Attention mechanisms have revolutionized deep learning by providing models with the ability to dynamically focus on relevant parts of the input data. This capability has led to significant advancements in various fields, including NLP, computer vision, and speech recognition. By understanding and leveraging attention mechanisms, researchers and practitioners can build more powerful and efficient models, pushing the boundaries of what is possible with deep learning. | monish3004 |
1,922,562 | O que é DTO? Por que usar? | Olá pessoal, sou Jean e vim trazer um artigo sobre DTO. Aqui é apenas a teoria e não terá código... | 0 | 2024-07-13T18:13:35 | https://dev.to/jeanv0/o-que-e-dto-por-que-usar-ehh | webdev, java, solidprinciples, dto | Olá pessoal, sou Jean e vim trazer um artigo sobre DTO. Aqui é apenas a teoria e não terá código prático. Espero que aproveitem!
## Introdução
DTO, ou "Objeto de Transferência de Dados" (do inglês, Data Transfer Object), como o nome sugere, é um objeto utilizado para enviar e receber dados. Normalmente é utilizado no backend de aplicações mais estruturadas.
## Mas por que usar DTO?
DTO é uma forma de simplificar e separar, proporcionando vários benefícios como:
1. **Encapsulamento**: Baseado na arquitetura limpa (clean architecture) e nos princípios SOLID, é uma maneira de agrupar/limitar dados para melhor organização e separação da lógica de negócios e outras camadas.
2. **Redução de Acoplamento**: Com a redução do acoplamento, há um melhor controle na manutenção e escalabilidade do código, além de possibilitar testes e outros tipos de manipulação.
3. **Segurança e Controle**: Ao separar e controlar melhor os dados, é possível implementar validadores, sistemas de segurança ou validação, e reduzir vazamentos de informações sensíveis.
4. **Desempenho**: Embora em alguns casos não haja melhoria direta, o uso de DTOs permite melhor controle e redução de dados desnecessários, resultando em pacotes de rede menores e potencialmente melhorando a performance.
5. **Facilidade de Testes**: Ao isolar partes do sistema, é possível simular cenários (mock), realizar testes isolados, e ter melhor visibilidade do fluxo de dados.
## Como utilizá-lo?
Existem várias formas de implementação, e aqui estão alguns exemplos em diferentes linguagens:
1. **JavaScript**: [DTOs in JavaScript](https://dev.to/tareksalem/dtos-in-javascript-118p)
2. **TypeScript**: [Simplifying DTO Management in Express.js with Class Transformer](https://dev.to/mdmostafizurrahaman/simplifying-dto-management-in-expressjs-with-class-transformer-56mh)
3. **Rust** (reddit): [Are DTOs and Entities the Right Way?](https://www.reddit.com/r/rust/comments/174o3ph/are_dtos_and_entities_the_right_way/)
## Quando utilizar DTO?
Listarei alguns contextos para explicar por que utilizar DTO:
- **Aplicações de web service**: Melhor controle do fluxo de dados para receber e retornar informações, estabelecendo um contrato claro entre cliente e servidor.
- **Sistemas distribuídos**: Em arquiteturas de microserviços e APIs, é benéfico para controlar e obter uma visão melhor do sistema, além de reduzir a latência devido à diminuição do tráfego de rede.
## Conclusão
O DTO é uma excelente forma de organizar, separar, otimizar, testar e realizar diversas outras tarefas dentro de uma aplicação. O conceito é semelhante ao do GRPC, que também utiliza uma estrutura bem definida. Enfim, espero que tenham gostado. | jeanv0 |
1,922,563 | How the internet works | What is internet The internet in a lay man terms can be perceive as a network of cables... | 0 | 2024-07-13T18:28:43 | https://dev.to/jideotetic/how-the-internet-works-4ocd | internet | ## What is internet
The internet in a lay man terms can be perceive as a network of cables that runs through out the world and this cables are the means in which computers from different locations can communicate with each other, the computers can be any form of device from a server to a laptop or even smartphones, at a very basic level, computers can communicate with each other by connecting via cables.
The solution in the picture above can be optimised with the use of a router (routers are computers that ensure a message sent from one computer find it way to the target computer). Instead of connecting each computer to one another via a cable, they are all connected to the router and when a computer sends a message out to another computer it goes through the router which will figure out the computer the message is meant for and deliver it.
### How does this local network communicate with other network outside
Internet Service Provider (ISP is a company that manages some special routers that are all linked together and can also access other ISPs' routers) helps connect our local network via a modem through the ISP router to get to our destination network.
### Finding a computer
Each computer can be identified by an internet protocol address (IP address) which is how a message sent from one computer can travel through the cables and find the right computer the message is meant for. The IP address is an address made of a series of four numbers separated by dots, for example: `192.0.2.172` but because the IP address are not easy to remember for humans, each IP address is given a domain name that is easily readable and can be remembered easily. Take a user for example on a laptop trying to access the google server, the google server IP address `142.250.190.78` (this can change in the future) can be type in a browser the google server will respond with the google search page.
If this article is helpful, consider liking, sharing, and following me; connect with me on [Twitter](https://x.com/Jideotetic) and [Linkedin](https://www.linkedin.com/in/jideotetic).
Happy coding. | jideotetic |
1,922,564 | Oracle Database Object List | { Abhilash Kumar Bhattaram : Follow on LinkedIn } One of the traditional problems of DBA's... | 0 | 2024-07-13T18:35:37 | https://dev.to/nabhaas/oracle-database-object-list-1bko | database, cloud, sql, developer | [](
<style>
.libutton {
display: flex;
flex-direction: column;
justify-content: center;
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text-align: center;
outline: none;
text-decoration: none !important;
color: #ffffff !important;
width: 200px;
height: 32px;
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background-color: #0A66C2;
font-family: "SF Pro Text", Helvetica, sans-serif;
{ Abhilash Kumar Bhattaram : </style> <a class="libutton" href="https://www.linkedin.com/comm/mynetwork/discovery-see-all?usecase=PEOPLE_FOLLOWS&followMember=abhilash-kumar-85b92918" target="_blank">Follow on LinkedIn</a>) }
One of the traditional problems of DBA's are to keep a track of the Oracle Database objects before and after any major application deployment. Most Database deployments would have a change on all kinds of objects which a development team may not be able to clarify in numbers. In addition to the tables and indexes which are seen as probably the most visible changes many DBA's lose track of the status of objects during deployments. The different kind of objects are table , index , synonym , package , procedure , function , etc.
The below script would show you the distinct objects in your database in case you are looking at this the first time.
```
SQL> select distinct(object_type) from all_objects;
```
It's very difficult to get a snapshot of the current objects , so I came up with my utility objlst.sql . This will quickly give me a snapshot of all database objects accounts segregated per database user and their sum.
Below is the my objlst utility
[https://github.com/abhilash-8/ora-tools/blob/master/objlst.sql](https://github.com/abhilash-8/ora-tools/blob/master/objlst.sql)
Below is a pictorial representation of what the SQL would do
Summary of Objects per user
Summary of Invalid Objects per user
Now as you can see having such a script would not only help me get a snapshot of my objects but also helps me compare the objects after a database deployment.
Many applications are sensitive to invalid objects , this scripts clearly points out which objetcs are invalid without much of an effort.
| abhilash8 |
1,922,565 | Detect cycle in linked list | Another linked list algorithm. Detect a cycle in a linked list. This is actually not that bad.... | 27,729 | 2024-07-13T18:15:58 | https://dev.to/johnscode/detect-cycle-in-linked-list-ib5 | go, interview, programming | Another linked list algorithm.
Detect a cycle in a linked list.
This is actually not that bad. There are at least 3 different ways to do it O(n) time.
The easiest way requires modifying the linked list node to include a flag that denotes if a node has been visited. As the list is traversed, if we encounter a node that has been visited then there is a cycle.
Another technique uses a hashmap containing visited nodes or references to them. As the list is traversed nodes, or their references, are inserted into the hash. If we encounter a node that is already represented in the hashmap, then a cycle exists. While this technique only requires a single traversal, it does require more memory due to the hashmap.
For this post, I am going to use Floyd's algorithm to detect the cycle. It's pretty simple.
```
func DetectCycle[T any](ll *LinkedList[T]) bool {
slow := ll.Head
fast := ll.Head
for fast != nil && fast.Next != nil {
slow = slow.Next
fast = fast.Next.Next
if fast == slow {
return true
}
}
return false
}
```
This technique uses 2 pointers into the list. As the list is traversed, one pointer moves one node at a time and the other moves two nodes at a time. If the 2 pointers ever meet, a cycle exists.
Why does this work? As the list is traversed, the distance between the two pointers increases. If there is a cycle, the fast pointer will 'lap' the slow one.
Is there a more efficient implementation? Are any boundary conditions missing? Let me know in the comments.
Thanks!
_The code for this post and all posts in this series can be found [here](https://github.com/johnscode/gocodingchallenges)_ | johnscode |
1,922,566 | 快连vpn安卓下载 | Top 10 Features of连vpn下载 In the digital age, online privacy has become paramount for internet users... | 0 | 2024-07-13T18:17:22 | https://dev.to/fasts_vpn/kuai-lian-vpnan-zhuo-xia-zai-4imk | 快连vpn, 快连vpn下载, 快连vpn安卓破解版 |
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1,922,567 | Developer diary #15. ChatGPT and Taro | I have heard so funny story today. One person, who like Taro card and Numerology, tried to use... | 0 | 2024-07-13T18:19:36 | https://dev.to/kiolk/developer-diary-15-chatgpt-and-taro-4l36 | programming, ai, management, java | I have heard so funny story today. One person, who like Taro card and Numerology, tried to use ChatGPT for prediction and for checking past events. She uploaded some data about itself, also she added exact time of her birth. In output, she got several past events about marriage and divorce that were very close to real dates. This moment inspired her to ask about future events. I don't know what she got, but It can determine her future behavior.
I like to use several models to solve some programming problems. I have recognized that output is very often different and depends on data that was used for training model. Sometimes result absolute irrelevant because API of some library was changed.
I think, many people trust ChatGPT because they heard about some news when model helped to recognize some disease or similar. But they don't understand about what amount and quality of data should be laid in base to get relevant and correct information. | kiolk |
1,923,713 | Terasop APP | Short Description (80/80 characters) Terasop: App with Telegram bot to download and stream... | 0 | 2024-07-15T05:31:46 | https://dev.to/terasop/terasop-app-a8a | terabox | ### Short Description (80/80 characters)
Terasop: App with Telegram bot to download and stream Terabox video files seamlessly.
### Description
Terasop is a versatile app designed to enhance your Terabox experience. With Terasop, you can effortlessly download and stream Terabox video files directly through the app or using the integrated Telegram bot (@terasop_bot). This app provides a convenient way to access your video content without the hassle of multiple steps, ensuring a seamless and user-friendly experience.
### Privacy Policy
**Privacy Policy for Terasop**
Effective Date: 1 January 2028
At Terasop, we value your privacy and are committed to protecting your personal information. This Privacy Policy outlines how we collect, use, and safeguard your data when you use our app and Telegram bot.
**1. Information We Collect**
- **User Data**: We collect your Telegram user ID and other relevant details to provide personalized services.
- **Usage Data**: We may collect information about how you interact with the app and bot, including commands issued and files downloaded or streamed.
**2. How We Use Your Information**
- **Service Delivery**: To deliver the features and functionalities of Terasop.
- **Improvement**: To understand usage patterns and improve the app’s and bot’s performance and features.
- **Communication**: To send you updates and important information about the app and bot.
**3. Data Sharing and Disclosure**
We do not sell, trade, or otherwise transfer your personal information to outside parties. However, we may share your information:
- **With service providers**: Who assist us in operating the app and bot and providing services to you, provided they agree to keep this information confidential.
- **When required by law**: To comply with legal obligations or respond to lawful requests by public authorities.
**4. Data Security**
We implement a variety of security measures to maintain the safety of your personal information. Your data is stored securely and is only accessible by authorized personnel.
**5. Your Rights**
You have the right to access, correct, or delete your personal information. You can do this by contacting us through the support options provided in the app and bot.
**6. Changes to This Privacy Policy**
We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on our app and bot. You are advised to review this Privacy Policy periodically for any changes.
**7. Contact Us**
If you have any questions about this Privacy Policy, please contact us at [Contact Information].
By using Terasop, you agree to the collection and use of information in accordance with this policy.
| banmyaccount |
1,922,591 | Seeking Recommendations for a Real-Time Database for High-Speed Data Fetching and Updating | I'm currently working on an exciting project involving a telemetry dashboard for a rocket's avionics... | 0 | 2024-07-13T18:25:39 | https://dev.to/anshugupta/seeking-recommendations-for-a-real-time-database-for-high-speed-data-fetching-and-updating-732 | I'm currently working on an exciting project involving a telemetry dashboard for a rocket's avionics system. The core of this project involves capturing and displaying real-time data at high speed. To achieve this, I'm using pyserial to fetch data from the avionics system.
**The Challenge**
The primary challenge is finding a database solution that can keep up with the high-speed data updates and fetches required for this project. The data stream from pyserial is continuous and needs to be stored and retrieved almost instantaneously for real-time display.
**Requirements**
High-Speed Data Ingestion: The database must handle rapid data insertion without performance degradation.
Efficient Data Retrieval: Quick query response times for real-time data display.
Scalability: Ability to scale as the amount of data grows.
Reliability: Ensuring data integrity and availability.
I would greatly appreciate any insights, experiences, or recommendations you can share. Thank you in advance for your help! | anshugupta | |
1,922,593 | Ridge Regression, Regression: Supervised Machine Learning | Higher Order Polynomial Higher-order polynomial regression allows for modeling complex... | 0 | 2024-07-13T19:46:39 | https://dev.to/harshm03/ridge-regression-regression-supervised-machine-learning-1h10 | machinelearning, datascience, python, tutorial | ### Higher Order Polynomial
Higher-order polynomial regression allows for modeling complex relationships between the independent variable and the dependent variable. This approach can capture nonlinear trends that linear regression might miss but also runs the risk of overfitting if the degree is too high.
#### Python Code Example
```python
# Import Libraries
import numpy as np
import matplotlib.pyplot as plt
from sklearn.model_selection import train_test_split
from sklearn.preprocessing import PolynomialFeatures
from sklearn.linear_model import LinearRegression
from sklearn.metrics import mean_squared_error, r2_score
# Generate Sample Data
np.random.seed(42)
X = np.linspace(0, 10, 100).reshape(-1, 1)
y = 3 * X.ravel() + np.sin(2 * X.ravel()) * 5 + np.random.normal(0, 1, 100)
# Split the Dataset
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)
# Function to create and evaluate model
degree = 3 # Change this value for different polynomial degrees
poly = PolynomialFeatures(degree=degree)
X_poly_train = poly.fit_transform(X_train)
X_poly_test = poly.transform(X_test)
model = LinearRegression()
model.fit(X_poly_train, y_train)
y_pred = model.predict(X_poly_test)
mse = mean_squared_error(y_test, y_pred)
r2 = r2_score(y_test, y_pred)
print(f'\nDegree {degree}:')
print(f'Mean Squared Error: {mse:.2f}')
print(f'R-squared: {r2:.2f}')
print(f'Coefficients: {model.coef_}')
# Plot the Results
plt.figure(figsize=(10, 6))
plt.scatter(X, y, color='blue', alpha=0.5, label='Data Points')
X_grid = np.linspace(0, 10, 1000).reshape(-1, 1)
y_grid = model.predict(poly.transform(X_grid))
plt.plot(X_grid, y_grid, color='red', linewidth=2, label=f'Fitted Polynomial (Degree {degree})')
plt.title(f'Polynomial Regression (Degree {degree})')
plt.xlabel('X')
plt.ylabel('Y')
plt.legend()
plt.grid(True)
plt.show()
```
##### Polynomial Regression of Degree 3
In this example, we set the polynomial degree to 3. This allows us to model the relationship between our generated data points in a way that can capture some of the underlying trends effectively.
```python
# Function to create and evaluate model
degree = 3 # Degree of the polynomial
```
`Output:`
`Model Coefficients: [ 0., 0.18306778, 0.51199233, -0.02726728 ] are very small`
##### Polynomial Regression of Degree 6
To explore a more complex relationship, we can increase the degree to 6.
```python
# Function to create and evaluate model
degree = 6 # Degree of the polynomial
```
`Output:`
`Model Coefficients: [ 0.00000000e+00, -6.83739429e+00, 5.74000805e+00, -1.99306116e+00, 3.95724255e-01, -3.92559946e-02, 1.48453341e-03 ] are large`
##### Polynomial Regression of Degree 12
For an even more complex fit, we can use a polynomial degree of 12.
```python
# Function to create and evaluate model
degree = 12 # Degree of the polynomial
```
`Output:`
`Model Coefficients: [ 0.00000000e+00, 6.75571349e+01, -1.72887982e+02, 2.52401492e+02, -2.23210296e+02, 1.21467320e+02, -4.18694825e+01, 9.38693129e+00, -1.38544413e+00, 1.33478833e-01, -8.07459293e-03, 2.78272006e-04, -4.16589951e-06 ] are very large`
By varying the polynomial degree, we can observe how the model fits the data, balancing the need for complexity with the risk of overfitting. The coefficients change as the degree increases, reflecting the model's adaptation to capture the underlying patterns in the data more closely.
### Ridge Regression
Ridge regression, also known as L2 regularization, is a linear regression technique that incorporates a penalty term in the ordinary least squares (OLS) loss function. This penalty helps to prevent overfitting, especially in situations where multicollinearity (correlation among independent variables) is present.
The ridge regression loss function can be expressed as:
`Loss = Σ(yi - ŷi)^2 + λ * Σ(wj^2)`
where:
- yi is the actual value,
- ŷi is the predicted value,
- wj represents the coefficients,
- λ (lambda) is the regularization parameter.
In this equation:
- The term `Σ(yi - ŷi)^2` is the Ordinary Least Squares (OLS) part, which represents the sum of squared residuals (the differences between observed and predicted values).
- The term `λ * Σ(wj^2)` is the L2 penalty term, which adds the penalty for the size of the coefficients.
#### Key Concepts
1. **Ordinary Least Squares (OLS)**:
In standard linear regression, the goal is to minimize the sum of squared residuals. The loss function for OLS is the sum of squared errors.
2. **Adding L2 Penalty**:
Ridge regression modifies the OLS loss function by adding an L2 penalty term, which is the sum of the squares of the coefficients multiplied by the regularization parameter (lambda). This penalty stabilizes coefficient estimates.
3. **Regularization Parameter (λ)**:
The value of lambda controls the strength of the penalty. A larger lambda increases the penalty on the size of the coefficients, leading to more regularization, while a smaller lambda allows for larger coefficients, approaching the OLS solution. When lambda is zero, ridge regression becomes equivalent to ordinary least squares.
### Coefficients in L2 Regularization (Ridge Regression)
**Penalty Term**: The L2 penalty term is the sum of the squares of the coefficients.
- **Equation**: `Loss = Σ(yi - ŷi)^2 + λ * Σ(wj^2)`
- **Effect on Coefficients**: L2 regularization shrinks the coefficients uniformly, preventing them from becoming excessively large. However, it rarely drives them to exactly zero.
- **Usage**: This technique is useful for addressing multicollinearity and generally results in smaller, more stable coefficients.
- **Pattern in Coefficient Plotting**: In coefficient plots for L2 regularization, all coefficients are reduced smoothly as the regularization parameter increases, without any coefficients dropping out entirely.
- **As λ Approaches Zero**: When lambda is zero, the model behaves like ordinary least squares (OLS) regression, where coefficients can take on large values.
- **As λ Approaches Infinity**: As lambda moves towards infinity, all coefficients approach zero, causing the model to underfit the data by becoming overly simplistic.
### Ridge Regression Example
Ridge regression is a technique that applies L2 regularization to linear regression, which helps mitigate overfitting by adding a penalty term to the loss function. This example uses a polynomial regression approach with ridge regression to demonstrate how to model complex relationships while controlling for overfitting.
#### Python Code Example
**1. Import Libraries**
```python
import numpy as np
import matplotlib.pyplot as plt
from sklearn.model_selection import train_test_split
from sklearn.preprocessing import PolynomialFeatures
from sklearn.linear_model import Ridge
from sklearn.metrics import mean_squared_error, r2_score
```
This block imports the necessary libraries for data manipulation, plotting, and machine learning.
**2. Generate Sample Data**
```python
np.random.seed(42) # For reproducibility
X = np.linspace(0, 10, 100).reshape(-1, 1)
y = 3 * X.ravel() + np.sin(2 * X.ravel()) * 5 + np.random.normal(0, 1, 100)
```
This block generates sample data representing a relationship with some noise, simulating real-world data variations.
**3. Split the Dataset**
```python
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)
```
This block splits the dataset into training and testing sets for model evaluation.
**4. Create Polynomial Features**
```python
degree = 12 # Change this value for different polynomial degrees
poly = PolynomialFeatures(degree=degree)
X_poly_train = poly.fit_transform(X_train)
X_poly_test = poly.transform(X_test)
```
This block generates polynomial features from the training and testing datasets, allowing the model to capture non-linear relationships.
**5. Create and Train the Ridge Regression Model**
```python
model = Ridge(alpha=1.0) # Alpha is the regularization strength
model.fit(X_poly_train, y_train)
```
This block initializes the ridge regression model and trains it using the polynomial features derived from the training dataset.
**6. Make Predictions**
```python
y_pred = model.predict(X_poly_test)
```
This block uses the trained model to make predictions on the test set.
**7. Plot the Results**
```python
plt.figure(figsize=(10, 6))
plt.scatter(X, y, color='blue', alpha=0.5, label='Data Points')
X_grid = np.linspace(0, 10, 1000).reshape(-1, 1)
y_grid = model.predict(poly.transform(X_grid))
plt.plot(X_grid, y_grid, color='red', linewidth=2, label=f'Fitted Polynomial (Degree {degree})')
plt.title(f'Ridge Regression (Polynomial Degree {degree})')
plt.xlabel('X')
plt.ylabel('Y')
plt.legend()
plt.grid(True)
plt.show()
```
`Output with alpha = 0.1:`
`Output with alpha = 1000:`
This block creates a scatter plot of the actual data points versus the predicted values from the ridge regression model, visualizing the fitted polynomial curve.
This structured approach demonstrates how to implement and evaluate ridge regression with polynomial features. By controlling for overfitting through L2 regularization, ridge regression effectively models complex relationships in data, enhancing the robustness of predictions while retaining interpretability. | harshm03 |
1,922,594 | 2751. Robot Collisions | 2751. Robot Collisions Hard There are n 1-indexed robots, each having a position on a line, health,... | 27,523 | 2024-07-13T18:40:16 | https://dev.to/mdarifulhaque/2751-robot-collisions-49ge | php, leetcode, algorithms, programming | 2751\. Robot Collisions
Hard
There are `n` **1-indexed** robots, each having a position on a line, health, and movement direction.
You are given **0-indexed** integer arrays `positions`, `healths`, and a string `directions` (`directions[i]` is either **'L'** for **left** or **'R'** for **right**). All integers in `positions` are **unique**.
All robots start moving on the line **simultaneously** at the **same speed** in their given directions. If two robots ever share the same position while moving, they will **collide**.
If two robots collide, the robot with **lower health** is **removed** from the line, and the health of the other robot **decreases by one**. The surviving robot continues in the **same** direction it was going. If both robots have the **same** health, they are both removed from the line.
Your task is to determine the **health** of the robots that survive the collisions, in the same **order** that the robots were given, i.e. final heath of robot 1 (if survived), final health of robot 2 (if survived), and so on. If there are no survivors, return an empty array.
Return _an array containing the health of the remaining robots (in the order they were given in the input), after no further collisions can occur_.
**Note:** The positions may be unsorted.
**Example 1:**
- **Input:** positions = [5,4,3,2,1], healths = [2,17,9,15,10], directions = "RRRRR"
- **Output:** [2,17,9,15,10]
- **Explanation:** No collision occurs in this example, since all robots are moving in the same direction. So, the health of the robots in order from the first robot is returned, [2, 17, 9, 15, 10].
**Example 2:**
- **Input:** positions = [3,5,2,6], healths = [10,10,15,12], directions = "RLRL"
- **Output:** [14]
- **Explanation:** There are 2 collisions in this example. Firstly, robot 1 and robot 2 will collide, and since both have the same health, they will be removed from the line. Next, robot 3 and robot 4 will collide and since robot 4's health is smaller, it gets removed, and robot 3's health becomes 15 - 1 = 14. Only robot 3 remains, so we return [14].
**Example 3:**
- **Input:** positions = [1,2,5,6], healths = [10,10,11,11], directions = "RLRL"
- **Output:** []
- **Explanation:** Robot 1 and robot 2 will collide and since both have the same health, they are both removed. Robot 3 and 4 will collide and since both have the same health, they are both removed. So, we return an empty array, [].
**Constraints:**
- <code>1 <= positions.length == healths.length == directions.length == n <= 10<sup>5</sup></code>
- <code>1 <= positions[i], healths[i] <= 10<sup>9</sup></code>
- `directions[i] == 'L'` or `directions[i] == 'R'`
- All values in `positions` are distinct
**Hint:**
1. Process the robots in the order of their positions to ensure that we process the collisions correctly.
2. To optimize the solution, use a stack to keep track of the surviving robots as we iterate through the positions.
3. Instead of simulating each collision, check the current robot against the top of the stack (if it exists) to determine if a collision occurs.
**Solution:**
Here's the step-by-step approach:
1. **Sort the robots by their positions**: Since the positions are unique, sorting will help us process collisions in the correct order.
2. **Use a stack to manage collisions**: As we iterate through the robots, we'll use a stack to keep track of the robots that are still on the line. When a robot moving to the left meets a robot moving to the right, they will collide and we will determine the result based on their healths.
3. **Handle collisions**: If a collision happens, the robot with the lower health will be removed and the robot with higher health will continue with reduced health. If both have the same health, both will be removed.
Here's the implementation in PHP: **[2751. Robot Collisions](https://github.com/mah-shamim/leet-code-in-php/tree/main/algorithms/002751-robot-collisions)**
```php
<?php
// Example1 usage
$positions = [1, 2, 5, 6];
$healths = [10, 10, 11, 11];
$directions = "RLRL";
print_r(robotCollisions($positions, $healths, $directions));
//Output: [2,17,9,15,10]
// Example2 usage
$positions = [3,5,2,6];
$healths = [10,10,15,12];
$directions = "RLRL";
print_r(robotCollisions($positions, $healths, $directions));
//Output: [14]
// Example3 usage
$positions = [1,2,5,6];
$healths = [10,10,11,11];
$directions = "RLRL";
print_r(robotCollisions($positions, $healths, $directions));
//Output: []
?>
```
### Explanation
1. **Data Preparation**: We prepare an array of robots that include their positions, healths, directions, and original indices.
2. **Sorting**: We sort the robots based on their positions to ensure that we process potential collisions in the correct order.
3. **Stack Processing**: We use a stack to manage the robots. Robots moving to the right are simply pushed onto the stack. When a robot moving to the left is encountered, we handle collisions by popping from the stack and comparing healths.
4. **Result Preparation**: Finally, we prepare the result array based on the original indices of the robots, ensuring that the order is maintained.
This solution ensures that we efficiently handle up to <code>(10<sup>5</sup>)</code> robots with the given constraints.
**Contact Links**
If you found this series helpful, please consider giving the **[repository](https://github.com/mah-shamim/leet-code-in-php)** a star on GitHub or sharing the post on your favorite social networks 😍. Your support would mean a lot to me!
If you want more helpful content like this, feel free to follow me:
- **[LinkedIn](https://www.linkedin.com/in/arifulhaque/)**
- **[GitHub](https://github.com/mah-shamim)**
| mdarifulhaque |
1,922,596 | Every product needs a design system | A design system provides a set of standards, guidelines, and reusable components to ensure... | 0 | 2024-07-17T12:25:00 | https://dev.to/woovi/every-product-needs-a-design-system-1g7e | design, designsystem, frontend | A design system provides a set of standards, guidelines, and reusable components to ensure consistency and efficiency in the design and development of digital products.
Below is a list of benefits that you have when your product is built on top of a design system
## Consistency
A design system ensures that all components of a product look and feel the same, providing a seamless experience for users. Consistency in design elements like colors, typography, and spacing helps build brand identity and user trust.
## Efficiency
With a design system, designers and developers can reuse pre-defined components and guidelines, speeding up the design and development process. This reduces the need to reinvent the wheel for each new feature or page.
## Scalability
As a product grows, a design system helps maintain design quality and coherence across different platforms and devices. It provides a scalable solution for adding new features without compromising the user experience.
## Collaboration
Design systems facilitate better collaboration between designers, developers, and other stakeholders. Clear guidelines and documentation ensure that everyone is on the same page, reducing miscommunication and errors.
## Maintenance
A design system makes it easier to update and maintain a product. Changes to the design or new features can be implemented more smoothly and consistently.
## User Experience
Consistent and well-designed interfaces enhance the overall user experience. Users can navigate and interact with the product more intuitively, leading to higher satisfaction and engagement.
## Brand Identity
A cohesive design system reinforces brand identity by ensuring that all visual elements align with the brand’s guidelines and values. This helps create a strong and recognizable brand presence.
## Cost-Effectiveness
By reducing the time and resources needed to create and maintain design elements, a design system can be cost-effective in the long run. It minimizes redundancy and streamlines the workflow.
## In Conclusion
You don't need to build your design system from scratch, you can build on top of existing libraries like material-ui, `shadcn`, or others.
Your developers will ship faster and more consistent frontend when they have a design system.
You also reduce the time of the designers for new screens, as you can just reuse existing components, and don't need to think about UI for simple screens.
If you don't have a design system, it is a good idea to start one today.
---
Woovi
[Woovi](https://www.woovi.com) is a Startup that enables shoppers to pay as they like. Woovi provides instant payment solutions for merchants to accept orders to make this possible.
If you want to work with us, we are [hiring](https://woovi.com/jobs/)! | sibelius |
1,922,597 | How to publish your React Native app to Expo Store 2024 | I recently tried publishing my React Native app to the Expo store, only to discover that most... | 0 | 2024-07-13T22:33:29 | https://dev.to/lucky_oniovosa_2da4ce3a99/how-to-publish-your-react-native-app-to-expo-store-2024-3hpf | reactnative, expo | I recently tried publishing my React Native app to the Expo store, only to discover that most articles on this topic are obsolete.
This article aims to help anyone trying to publish their React Native app to the Expo Store by following these simple steps.
- **Create your project**
```
npx create-expo-app@latest
```
- **Install EAS CLI**
```
sudo npm install --global eas-cli
```
- **Ensure you have an account on Expo**
> [Create Expo account here](https://expo.dev/)
- **Login to your Expo account on the terminal**
```
npx expo login
```
- **Create or link to your Expo project**
To create a new project, use the command below
```
eas init
```
if you already have an existing project on your Expo dashboard, use this command
```
eas init --id [paste your project ID gotten from your dashboard]
```
- **Deploy to expo**
```
eas update
```
If you encountered an error like I did while deploying, you might want to clear the cache and re-deploy.
To clear the cache
```
sudo npm cache clean --force
```
I hope you find this article helpful,
Happy reading, Happy Coding😀 | lucky_oniovosa_2da4ce3a99 |
1,922,598 | this is blacnk | helklo darkness m old frein di have come to talk toyou agian so do you really get of form ne | 0 | 2024-07-13T18:57:50 | https://dev.to/ako_mawlood_d224fb581fad5/this-is-blacnk-c2m | helklo darkness m old frein di have come to talk toyou agian so do you really get of form ne | ako_mawlood_d224fb581fad5 | |
1,922,603 | Wix Studio Challenge with Special Guest Judge Ania Kubów | This is a submission for the Wix Studio Challenge . What I Built i built the project... | 0 | 2024-07-13T19:16:46 | https://dev.to/jupli_69a6c746ecb2a6ea653/wix-studio-challenge-with-special-guest-judge-ania-kubow-ba6 | devchallenge, wixstudiochallenge, webdev, javascript | *This is a submission for the [Wix Studio Challenge ](https://dev.to/challenges/wix).*
## What I Built
<!-- Share an overview about your project. -->
i built the project ecommerce for selling men's wear outfits
## Demo
<!-- Share a link to your Wix Studio app and include some screenshots here. -->
https://jupli5033.wixstudio.io/menleisures
## Development Journey
<!-- Tell us how you leveraged Wix Studio’s JavaScript development capabilities-->
it was so easy to use and much more users friendly to use
<!-- Which APIs and Libraries did you utilize? -->
CMS (Catalog,Product,inventories) and button interactions
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
<!-- Don't forget to add a cover image (if you want). -->
<!-- Thanks for participating! → | jupli_69a6c746ecb2a6ea653 |
1,922,604 | AWS GuardDuty: The Unstoppable Sentinel - Mastering Cloud Threat Detection with AI-Powered Vigilance | Embarking on an odyssey that shall unveil the inner workings of AWS GuardDuty, equipping you with the... | 0 | 2024-07-13T19:19:12 | https://dev.to/ikoh_sylva/aws-guardduty-the-unstoppable-sentinel-mastering-cloud-threat-detection-with-ai-powered-vigilance-8a7 | aws, cloudcomputing, cloudskills, cloudstorage | Embarking on an odyssey that shall unveil the inner workings of AWS GuardDuty, equipping you with the knowledge and strategies to wield its power and elevate your threat detection capabilities to new heights. Brace yourselves, for this journey will not only illuminate the path to unparalleled security vigilance but also fortify your defences against the ever-evolving onslaught of cyber threats and also an intriguing real-world scenario from Our Anonymous AWS Security Specialist on “The Phantom Menace: A Harrowing Tale of Cloud Infiltration Defused”
## The Watchful Guardian: Understanding AWS GuardDuty
At its core, AWS GuardDuty is a comprehensive threat detection service, employing advanced machine learning algorithms and continuously evolving threat intelligence to monitor your AWS accounts for potential security threats. Much like a tireless sentry, GuardDuty scans your resource configurations, network activity, and account behaviour for anomalies that may indicate the presence of malicious actors or compromised resources.
This relentless vigilance empowers security professionals, cloud architects, and administrators to proactively identify and respond to potential threats, mitigating the risk of data breaches, unauthorized access, and other nefarious activities that could jeopardize the integrity of their cloud environments.
## The Unblinking Eye: Unveiling AWS GuardDuty's Capabilities
AWS GuardDuty's prowess extends far beyond mere threat detection, offering a multitude of capabilities that enable us to harness the power of continuous monitoring and advanced threat intelligence for enhanced security posture and incident response.
- Comprehensive Threat Detection: AWS GuardDuty continuously monitors your AWS environments for a wide range of potential threats, including: Compromised instances and account takeovers, Malicious reconnaissance activities, Unauthorized access attempts, Suspicious network traffic patterns, Crypto currency mining activities,Escalated privileges and policy violations
- Machine Learning-Powered Threat Identification: At the heart of AWS GuardDuty lies a powerful machine learning engine, which continuously analyses vast troves of data from AWS CloudTrail, VPC Flow Logs, and DNS logs to identify potential threats. This advanced analytics capability enables GuardDuty to detect even the most sophisticated and evasive attacks, adapting and evolving with each new threat encountered.
- Intelligent Threat Intelligence Integration: AWS GuardDuty is fuelled by a continuously expanding knowledge base of threat intelligence, encompassing data from AWS' global network of security researchers, third-party threat intelligence providers, and real-world customer environments. This integration ensures that GuardDuty remains ever-vigilant, capable of detecting emerging threats and adapting to the rapidly evolving threat landscape.
- Seamless Integration with AWS Services: AWS GuardDuty seamlessly integrates with a plethora of AWS services, enabling you to orchestrate comprehensive security workflows and automate incident response actions. Leverage Amazon CloudWatch for centralized monitoring and alerting, Amazon EventBridge for event-driven automation, and AWS Lambda for custom remediation and response actions.
- Flexible Deployment and Configuration: AWS GuardDuty offers flexible deployment options, allowing you to enable threat detection across multiple AWS accounts and regions with ease. Customize your threat detection settings, configure trusted IP lists, and fine-tune GuardDuty's sensitivity to align with your organization's unique security requirements and risk tolerance levels.
## Unleashing the Guardian's Fury: A Comprehensive AWS GuardDuty Deployment Strategy
To unleash the full potential of AWS GuardDuty and fortify your cloud defences against the ever-present threat of malicious actors, a well-orchestrated deployment strategy is essential. Let us embark on this journey together, unveiling the steps to unlock GuardDuty's prowess and ensuring your cloud environment remains an impregnable fortress.
- Enable AWS GuardDuty across all Accounts and Regions: AWS GuardDuty operates on a per-account and per-region basis, meaning that you must explicitly enable and configure it for each AWS account and region in which you have resources. By enabling GuardDuty across all accounts and regions, you ensure comprehensive visibility and threat detection coverage, leaving no blind spots within your cloud infrastructure.
- Integrate with AWS CloudTrail and VPC Flow Logs: AWS GuardDuty relies on AWS CloudTrail and VPC Flow Logs as critical data sources for its threat detection capabilities. Ensure that CloudTrail and VPC Flow Logs are enabled and properly configured within your accounts, providing GuardDuty with the necessary data to perform its analysis and identify potential threats.
- Configure Trusted IP Lists and Threat Detection Settings: AWS GuardDuty allows you to define trusted IP lists, ensuring that legitimate traffic from known sources is not flagged as suspicious. Additionally, you can fine-tune GuardDuty's threat detection settings, adjusting the sensitivity levels to align with your organization's risk tolerance and security posture.
- Establish Monitoring and Alerting Mechanisms: AWS GuardDuty generates findings, which are detailed reports of potential threats detected within your environment. Leverage Amazon CloudWatch to centralize the monitoring and alerting of these findings, enabling you to receive real-time notifications and respond swiftly to potential security incidents.
- Integrate with Security Information and Event Management (SIEM) Solutions: To further enhance your security posture and incident response capabilities, integrate AWS GuardDuty with your existing Security Information and Event Management (SIEM) solutions. This integration allows you to consolidate threat intelligence data, streamline security workflows, and leverage advanced analytical capabilities for comprehensive threat detection and response.
- Automate Incident Response with AWS Lambda and EventBridge: Harness the power of AWS Lambda and Amazon EventBridge to automate your incident response processes. Leverage EventBridge to trigger Lambda functions based on GuardDuty findings, enabling you to execute custom remediation actions, such as isolating compromised resources, revoking access keys, or initiating forensic investigations.
- Foster a Culture of Continuous Improvement: Threat detection is an ever-evolving battleground, and complacency is the enemy of resilience. Continuously monitor your GuardDuty configurations, findings, and incident response processes, identifying areas for optimization and improvement. Stay vigilant for new threats, emerging best practices, and evolving regulatory requirements, adapting your security strategy accordingly.
## The Phantom Menace: A Harrowing Tale of Cloud Infiltration Defused
Deep within the labyrinthine corridors of our meticulously architected cloud infrastructure, an insidious presence lurked, its malevolent intentions veiled by a cloak of subterfuge. Unbeknownst to us, this phantom menace had silently infiltrated our defences, siphoning precious data and leaving a trail of digital breadcrumbs in its wake.
It was a routine security audit that first unveiled the chilling truth – anomalous network traffic patterns, unauthorized access attempts, and tell-tale signs of privilege escalation. The alarm bells rang deafeningly, summoning our elite cloud security team to marshal their forces and confront this unseen adversary.
AWS GuardDuty, our ever-vigilant sentinel, whose machine learning prowess and vast troves of threat intelligence had already begun unravelling the threads of this sinister plot. With bated breath, we pored over the detailed findings, tracing the phantom's movements and uncovering a sophisticated multi-vector attack that threatened to compromise the very fabric of our cloud kingdom.
But we were not defenceless, for the unblinking eye of AWS GuardDuty had already set in motion a series of countermeasures, seamlessly integrating with our Amazon CloudWatch monitoring systems and Amazon EventBridge automation pipelines.
In a symphony of digital warfare, our AWS Lambda functions sprang into action, executing custom remediation scripts and isolating the compromised resources before they could inflict further harm. Simultaneously, our Security Information and Event Management (SIEM) solutions, fortified by GuardDuty's threat intelligence data, illuminated the phantom's tactics, enabling us to fortify our defences and plug the vulnerabilities through which it had slithered.
The battle raged on, with our security teams working tirelessly to thwart the phantom's advances, guided by the relentless vigilance of AWS GuardDuty. Each time the menace shifted tactics, our sentinel adapted, its machine learning algorithms evolving in real-time to detect and neutralize the ever-changing threats.
Finally, after a gruelling campaign that pushed our cloud defences to their limits, the phantom's grip began to wane. Its last desperate attempts to evade detection were swiftly quelled by GuardDuty's intelligent threat intelligence integration, which had already disseminated countermeasures to our global security network.
As the digital smoke cleared, we stood victorious, our cloud kingdom once again secure, its borders fortified by the unwavering guardianship of AWS GuardDuty. In the aftermath, we convened a council of cloud architects and security experts, meticulously analysing the incident and identifying areas for further hardening and optimization.
From this harrowing ordeal, we emerged with a renewed appreciation for the power of AWS GuardDuty and its AI-powered vigilance. We fortified our threat detection strategies, implementing stringent monitoring protocols, automating incident response workflows, and fostering a culture of continuous learning and adaptation.
With AWS GuardDuty as our unstoppable sentinel, we stand ready to confront the phantoms that lurk in the digital shadows, safeguarding our cloud empires with relentless resolve and uncompromising vigilance.
## The Invaluable Lessons Learned.
The invaluable lessons learned during this epic clash against the insidious forces of cyber threats have become sacred tenets that we now impart to our fellow cloud enthusiasts, equipping them with the knowledge and fortitude to weather the tempests of digital warfare.
- Embrace Proactive Threat Hunting and Continuous Monitoring: The phantom menace's cunning infiltration underscored the dire consequences of adopting a reactive security posture. Relying solely on traditional perimeter defences and incident response proved woefully inadequate in the face of such a sophisticated, multi-vector attack.
In the aftermath, we doubled down on our commitment to proactive threat hunting and continuous monitoring, leveraging AWS GuardDuty's advanced threat detection capabilities to stay ever-vigilant for the faintest whispers of malicious activity. Embracing a proactive mind-set empowered us to identify and neutralize threats before they could wreak havoc on our cloud kingdom.
- Foster a Culture of Security Vigilance and Collaborative Response: The phantom menace's near-victory was a stark reminder that complacency and siloed operations are the sworn enemies of cyber resilience. In the heat of battle, our security teams' ability to swiftly coordinate and leverage each other's strengths proved instrumental in thwarting the adversary's advances.
We now foster a culture of security vigilance, where every member of our cloud architecture and operations teams is trained to recognize potential threats and empowered to escalate concerns. Additionally, we have established cross-functional incident response teams, fostering collaboration and knowledge-sharing across disciplines, ensuring a unified front against the ever-evolving onslaught of cyber threats.
- Leverage Automation and Orchestration for Rapid Response: During the phantom menace's relentless assault, our ability to rapidly isolate compromised resources and execute remediation scripts proved pivotal in containing the damage and preventing further infiltration. This experience highlighted the critical importance of embracing automation and orchestration in our security workflows.
We now leverage AWS Lambda and Amazon EventBridge to automate incident response actions, enabling us to swiftly execute pre-defined remediation playbooks based on GuardDuty's threat intelligence. This automation not only accelerates our response times but also ensures consistency and minimizes the risk of human error during high-stress security incidents.
- Integrate Threat Intelligence and SIEM Solutions: The phantom menace's ever-shifting tactics demonstrated the need for a comprehensive, centralized view of our security posture. Relying solely on GuardDuty's findings proved insufficient in unravelling the adversary's complex attack vectors and identifying potential vulnerabilities.
In response, we doubled down on our integration efforts, seamlessly incorporating AWS GuardDuty's threat intelligence data into our Security Information and Event Management (SIEM) solutions. This integration empowered us to correlate disparate security events, analyse historical data, and uncover patterns that illuminated the phantom's modus operandi, enabling us to fortify our defences and stay one step ahead of the adversary.
- Embrace Continuous Learning and Adaptation: The phantom menace's uncanny ability to adapt and evolve its tactics was a sobering reminder that the realm of cyber threats is a constantly shifting battleground. Relying solely on static defences and outdated knowledge is a sure fire path to defeat.
We now foster a culture of continuous learning and adaptation within our organization, encouraging our team members to attend industry events, participate in knowledge-sharing sessions, and pursue AWS security certifications to deepen their expertise. Additionally, we have implemented rigorous incident review processes, meticulously analysing every security event and updating our playbooks and configurations to reflect the latest threats and best practices.
In the ever-evolving theatre of cloud warfare, vigilance and adaptability are the hallmarks of true cyber resilience. By embracing these hard-won lessons and wielding the unstoppable power of AWS GuardDuty, you too shall ascend to the ranks of the elite cloud guardians, safeguarding your digital empires against the phantom menaces that lurk in the shadows of the digital frontier.
## The Guardian's Legacy: Unleashing the Power of AWS GuardDuty
As we navigate the treacherous landscapes of cyber threats, the implementation of AWS GuardDuty bestows upon us a myriad of advantages, fortifying our defences and elevating our threat detection capabilities to new heights of mastery.
- Proactive Threat Identification and Mitigation: AWS GuardDuty's continuous monitoring and advanced threat detection capabilities empower you to proactively identify potential security threats before they can wreak havoc on your cloud environment. This proactive approach minimizes the risk of data breaches, unauthorized access, and other malicious activities, protecting your organization's valuable assets and ensuring business continuity.
- Enhanced Incident Response and Forensics: GuardDuty's detailed findings and integration with SIEM solutions provide invaluable insights and forensic data, enabling your security teams to rapidly investigate and respond to potential security incidents. This streamlined incident response process mitigates the impact of threats, reduces recovery time, and minimizes the potential for data loss or system downtime.
- Compliance and Regulatory Adherence: Maintaining compliance with industry regulations and security frameworks is a critical aspect of modern cloud operations. AWS GuardDuty's comprehensive threat detection capabilities and detailed audit trails provide the necessary evidence and documentation to demonstrate adherence to various compliance requirements, mitigating the risk of non-compliance penalties and reputational damage.
- Cost-Effective and Scalable Security: Implementing a robust threat detection solution can be a daunting and resource-intensive endeavour, especially for organizations with limited security expertise or budget constraints. AWS GuardDuty offers a cost-effective and scalable solution, leveraging AWS' global network of security researchers and continuously evolving threat intelligence, ensuring that your organization remains protected without the need for substantial upfront investments.
## The Never-Ending Vigil: Vigilance and Adaptation
As we conclude our exploration of AWS GuardDuty, it is crucial to acknowledge that the pursuit of unrelenting threat detection and cyber resilience is a continuous journey, one that demands unwavering vigilance and a willingness to adapt to evolving threats, best practices, and technological advancements.
Embrace a proactive mind-set, staying abreast of emerging security trends, threat intelligence reports, and innovations in cloud security. Also clinch the power of the unblinking sentinel, and let AWS GuardDuty be your guiding light, illuminating the path to relentless threat detection and unwavering cyber resilience in the ever-evolving realm of cloud computing.
I am Ikoh Sylva a Cloud Computing Enthusiast with few months hands on experience on AWS. I’m currently documenting my Cloud journey here from a beginner’s perspective. If this sounds good to you kindly like and follow, also consider recommending this article to others who you think might also be starting out their cloud journeys.
You can also consider following me on social media below;
[LinkedIn](http://www.linkedin.com/in/ikoh-sylva-73a208185) [Facebook](https://www.facebook.com/Ikoh.Silver) [X](https://www.x.com/Ikoh_Sylva)
| ikoh_sylva |
1,922,614 | # Installing Laravel 11: A Step-by-Step Guide | Laravel 11 is a powerful PHP framework that helps developers build robust and scalable web... | 0 | 2024-07-13T19:34:12 | https://dev.to/jsandaruwan/-installing-laravel-11-a-step-by-step-guide-2mkj | webdev, beginners, programming, laravel | Laravel 11 is a powerful PHP framework that helps developers build robust and scalable web applications. This guide will walk you through the installation process and outline the dependencies required to get your Laravel 11 application up and running.
## Prerequisites
Before you install Laravel 11, ensure you have the following prerequisites installed on your machine:
1. **PHP**: Laravel 11 requires PHP 8.1 or higher.
2. **Composer**: Laravel uses Composer to manage its dependencies.
3. **Web Server**: Apache or Nginx is recommended.
4. **Database**: MySQL, PostgreSQL, SQLite, or SQL Server.
## Step 1: Install PHP
Make sure you have PHP 8.1 or higher installed. You can download the latest version of PHP from the [official PHP website](https://www.php.net/downloads).
Verify the installation by running:
```bash
php -v
```
## Step 2: Install Composer
Composer is a dependency manager for PHP. Download and install Composer from the [official Composer website](https://getcomposer.org/download/).
Verify the installation by running:
```bash
composer -v
```
## Step 3: Install Laravel 11
With PHP and Composer installed, you can now install Laravel 11. Open your terminal and run the following command:
```bash
composer create-project --prefer-dist laravel/laravel laravel11-app "11.*"
```
This command will create a new Laravel 11 project in a directory named `laravel11-app`.
## Step 4: Configure Environment
Navigate to your project directory:
```bash
cd laravel11-app
```
Copy the `.env.example` file to `.env`:
```bash
cp .env.example .env
```
Generate a new application key:
```bash
php artisan key:generate
```
Update your `.env` file with your database credentials and other necessary configurations.
## Step 5: Set Up a Web Server
### Using Artisan Serve (Development Only)
For development purposes, you can use Laravel's built-in server:
```bash
php artisan serve
```
Visit `http://localhost:8000` in your browser to see your Laravel application.
### Using Apache or Nginx (Production)
For production, configure your web server to serve your Laravel application. Below is a basic Nginx configuration:
```nginx
server {
listen 80;
server_name yourdomain.com;
root /path/to/laravel11-app/public;
index index.php index.html;
location / {
try_files $uri $uri/ /index.php?$query_string;
}
location ~ \.php$ {
include snippets/fastcgi-php.conf;
fastcgi_pass unix:/var/run/php/php8.1-fpm.sock;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
location ~ /\.ht {
deny all;
}
}
```
Replace `/path/to/laravel11-app` with the actual path to your Laravel application.
## Step 6: Install Dependencies
Laravel 11 comes with several dependencies pre-installed. However, you may need to install additional packages depending on your application's requirements. Here are some common dependencies:
- **Database**: Install the database driver for your chosen database (e.g., `pdo_mysql` for MySQL).
- **Cache**: For caching, you might want to install a Redis or Memcached driver.
- **Queue**: For job queues, you might use Redis, Beanstalkd, or Amazon SQS.
You can install additional packages using Composer. For example, to install the Redis driver, run:
```bash
composer require predis/predis
```
## Step 7: Run Migrations
Laravel uses migrations to manage the database schema. Run the following command to create the necessary tables:
```bash
php artisan migrate
```
## Conclusion
You have successfully installed Laravel 11 and set up your development environment. You can now start building your application. For more information on using Laravel, refer to the [official Laravel documentation](https://laravel.com/docs/11.x).
Happy coding!
Thank you,
J-Sandaruwan.
[linkedin](https://www.linkedin.com/in/j-sandaruwan/) | jsandaruwan |
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ZenCortex Reviews (ALERT 2024) Does this Hearing Health Support Drops Work? Ingredients, Benefits, and Where to Buy?
ZenCortex Customer Reviews and Complaints
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Here is what the customer says about the ZenCortex Supplement:
Sean B. - USA - North Carolina
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Though I've only been taking ZenCortex for three weeks, I already enjoy how simple it is and how well it supports my mental acuity. I add a few drops to my morning cup of coffee and continue. Even after sharing my supply with some friends, they already ask to return for more!
Jack S. - USA, Arizona
Conclusion
Based on the ZenCortex customer reviews and testimonials, they are positive and support credibility, as they easily address ringing ears and prevent various ear-related complications.
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https://groups.google.com/g/tensorflow-compression/c/Z-0A5ecbSfQ | zencortwork |
1,922,616 | Who's involved in the Freewallet scam | Alvin Hagg, the co-founder and CEO of Freewallet.org, has long shunned the spotlight. However, our... | 0 | 2024-07-13T19:42:40 | https://dev.to/feofhan/whos-involved-in-the-freewallet-scam-529o |
Alvin Hagg, the co-founder and CEO of Freewallet.org, has long shunned the spotlight. However, our recent investigation has unveiled a shocking truth: the real masterminds behind the Freewallet scam are two Russian immigrants, deeply involved in another fraudulent cryptocurrency venture, Cryptopay. Among them, Vasily Mesheryakov stands out as the primary PR manager orchestrating these scams.
Freewallet is promoted as a secure multi-currency wallet, but numerous reviews expose it as a major scam. Many users have lost their savings due to blocked or failed transactions. Similarly, Cryptopay, a payment and exchange service, entices victims with low fees, only for them to discover that they cannot withdraw their assets. Our findings reveal that both Freewallet and Cryptopay share the same ownership and employ identical fraudulent tactics.
Dmitry Gunyashov, another key figure, is believed to be at the helm of these operations, despite lacking experience in legitimate business management. His expertise lies in orchestrating scam operations while evading legal repercussions. The scheme is simple: clients create accounts, deposit funds, and then find their accounts blocked, leaving them unable to access their assets.
Mesheryakov's role is critical in maintaining the façade of legitimacy through aggressive marketing and buying positive reviews. His activities extend beyond Cryptopay and Freewallet, involving other ventures like Dioram.
For more information on Vasily Mesheryakov and to find contact details, visit https://vasily-mesheryakov.com/. Join us in holding these scammers accountable and help bring justice to the victims of these fraudulent schemes. If you have any additional information, please contact us at Freewallet-report@tutanota.com.
| feofhan | |
1,922,617 | Emailing Hacks you might want to know - 🥶 Cold Marketing | As developers, we often find ourselves needing to reach out to potential clients,... | 0 | 2024-07-13T19:45:34 | https://dev.to/1geek/emailing-hacks-you-might-want-to-know-cold-marketing-4fdl | emailing, marketing, hacks | As developers, we often find ourselves needing to reach out to potential clients, collaborators.
Cold emailing can be a powerful tool to achieve this,
Do you use other methods besides cold marketing? If so, share them in the comments.
But it requires a strategic approach. Here are some key takeaways from my experience:
1. **Personalize Your Emails**: It’s not enough to just use someone’s name. Dig into their work and mention specific details. This shows you’ve done your homework.
2. **Be Concise and Clear**: People don’t have time for long emails. Get to the point quickly and clearly.
3. **Strong Subject Lines**: You think questions and numbers in subject lines grab attention?
4. **Effective Follow-Ups**: Don’t just send one email and hope. Follow up strategically.
5. **Use a Clear Call-to-Action**:
This could be a request for a meeting or a proposal. Make it easy for the recipient to respond.
6. **Timing**:
Right time deliveribility make it more likely to get more acknowledgement.
These tweaks can make a big difference in response rates. For a complete guide, check [post i wrote for Clubwritter](https://shorturl.at/VPOmZ). | 1geek |
1,922,619 | It is all about time to market | It is all about time to market Recently, my sister became a mom, and motherhood comes with... | 0 | 2024-07-13T19:50:44 | https://dev.to/nosylasairaf/it-is-all-about-time-to-market-1hki |
# It is all about time to market
Recently, my sister became a mom, and motherhood comes with new problems that need solutions. Stay with me as I explain my point.
She gave me a list of issues and suggested a website or app could solve them. We brainstormed ideas like:
- Tracking diaper changes (pee/poop) to see if the baby's output is normal
- Daily, weekly, and monthly reports
- Counting feedings and which breast was used
- Tracking the baby's sleep duration
- Estimating diaper costs
- Medication reminders
- Recording the baby's temperature
I then searched the Play Store and found a solution that's been around since 2015. This simple app solves her problems and costs only 12 reais (BRL) (~$2.1 USD) per year. It boasts over 1 million downloads and 100,000 reviews, with 95% of them positive. It likely requires minimal maintenance from the developer, who probably doesn't need a team.
code is just commodity and
[sometimes, success is about being in the right place at the right time](https://websim.ai/c/aKIsBIa3aaphyYaJB) with the right knowledge to build.
| nosylasairaf | |
1,922,620 | AI in Retail: A Symphony of Innovation | Greetings, Future-Seekers! Welcome to a narrative of possibilities and a future shaped by rapid... | 27,673 | 2024-07-13T20:04:55 | https://dev.to/rapidinnovation/ai-in-retail-a-symphony-of-innovation-3lnh | Greetings, Future-Seekers! Welcome to a narrative of possibilities and a
future shaped by rapid innovation. Today, we delve into a realm where
Artificial Intelligence (AI) isn’t just a visitor; it’s a resident artist,
painting the retail canvas with strokes of brilliance, creating a masterpiece
of personalized experiences and pioneering transformations.
## Unveiling the AI Aura: A Symphony of Innovation
As we step into this landscape, the air buzzes with the hum of drones,
whispering the secrets of unseen realms and unexplored territories. These
aren’t your conventional shops; imagine instead AI-controlled drone hubs and
augmented bazaars that shift and adapt, creating a unique milieu for every
visitor. The aura is electric, pulsating with potential, as AI conducts a
symphony of innovation, harmonising technology with human desires.
## Predictive Analytics: Crafting Tapestry of Desires
In the heart of this renaissance, predictive analytics play the seer, gazing
into the crystal ball of consumer behaviors, unraveling the threads of
shopping trends, and weaving a tapestry that reflects your innermost desires.
The retail environment morphs into a personalized realm, sculpting a unique
narrative for every individual, fostering a symbiotic relationship between
consumer and brand, and crafting a story that resonates with the heartbeat of
personal preferences.
## Fortress of Solitude: Guarding the Galaxy of Data
In this voyage through digital constellations, safeguarding the celestial
bodies of personal data is paramount. Technologies like blockchain and
advanced encryption emerge as the guardians of the galaxy, ensuring that the
stars of your personal information remain untarnished and secure. It’s not
just about traversing through the retail universe; it’s about doing so with
the assurance that your data is shielded from cosmic threats.
## Personalized Paradises: Where Dreams Take Flight
The age of generalized retail realms is eclipsed by the dawn of personalized
paradises. Here, holographic companions greet you, virtual shelves transform
to showcase your desires, and products materialize as if conjured by celestial
beings. This isn’t a fleeting fantasy; it’s the dawn of a new reality, a realm
where every corner holds the promise of discovery and every moment is a step
into the extraordinary.
## The Architect of Tomorrow: Embracing Rapid Innovation
For the architects of dreams, entrepreneurs, and innovators, this renaissance
is a canvas of opportunities. The brushstrokes of rapid innovation carve
pathways through uncharted territories, inviting the daring to venture beyond
the known and shape the contours of the future retail landscape. The horizon
is limitless, and the potential is boundless for those who dare to dream and
venture into the unknown.
## Serenading the Senses: Crafting Harmonious Experiences
In this reimagined world, every sense is serenaded with a symphony of
experiences. The ambiance resonates with the melodies of personal preferences,
the textures tell tales of individual desires, and the visual panorama is a
reflection of personalized dreams. It’s a harmonious blend of technology and
human essence, creating a retail symphony that’s a celebration of
individuality and a feast for the senses.
## The Dance of Algorithms: Turning Data into Gold
In the alchemy of this retail renaissance, data is the raw element, and AI is
the alchemist. The dance of algorithms sifts through mountains of information,
discerning patterns, unraveling preferences, and turning raw data into
personalized retail experiences. It’s a ballet of digits and codes, where
every move brings the consumer closer to a retail experience that’s enchanting
and magical.
## Embracing the Enigma: The Future is Now
As we stand on the precipice of tomorrow, we see a future where every shopping
expedition is a journey into the enigma, a venture into a world painted with
the hues of AI and innovation. The retail environment is no longer a static
entity; it’s a dynamic, ever-evolving landscape that adapts, transforms, and
creates a narrative that’s as unique as every individual.
## The Entrepreneurial Odyssey: Crafting the Future
For the visionaries and the dreamers, this is a call to embark on an
entrepreneurial odyssey. The winds of rapid innovation fill the sails of
imagination, guiding the ship through uncharted waters and toward undiscovered
lands. The journey is fraught with challenges, but the rewards are boundless
for those who dare to seek, to find, and to create.
## Conclusion: Stepping Through Portals of Possibilities
Here we are, at the crossroads of today and tomorrow, gazing into a future
where the retail experience is a kaleidoscope of possibilities. The canvas is
vast, the palette is vibrant, and the masterpiece is waiting to be created.
So, let’s step through the portals of possibilities, let’s embrace the enigma,
and let’s craft a future where every shopping experience is a personalized
adventure, a story waiting to unfold, and a dream waiting to be lived.
📣📣Drive innovation with intelligent AI and secure blockchain technology! Check
out how we can help your business grow!
[Blockchain App Development](https://www.rapidinnovation.io/service-
development/blockchain-app-development-company-in-usa)
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development-company-in-usa)
[Blockchain App Development](https://www.rapidinnovation.io/service-
development/blockchain-app-development-company-in-usa) [AI Software
Development](https://www.rapidinnovation.io/ai-software-development-company-
in-usa)
## URLs
* <https://www.rapidinnovation.io/post/retails-robotic-renaissance-ais-profound-penetration>
## Hashtags
#AIFuture
#RetailInnovation
#PersonalizedShopping
#DataSecurity
#EntrepreneurialJourney
| rapidinnovation | |
1,922,621 | Just Got Back | Just got back from Founders Academy. It's now time for me to put this stuff into play. In Blog... | 0 | 2024-07-13T20:15:28 | https://dev.to/theholyspirit/just-got-back-1kln | startup, founder, venture, todayisearched | Just got back from Founders Academy. It's now time for me to put this stuff into play. In **Blog** sections, I'll share what I gathered directly from the conference. It might be raw notes; sometimes I have pictures. In **Academy,** sections, I show what I can of some of the more "homework" type exercises.
I have another motive to this series. I have an open question which goes, "How can software be used augment a founder's progress?"
This commences a series on my story with Founders Academy.
[Founders Academy Essential Workbook](https://dev.to/theholyspirit/founders-academy-workbook-3370) (academy)
[Founder Academy Day 1](https://dev.to/theholyspirit/founders-academy-day-1-pa4) (blog)
[Elevator Pitch](https://dev.to/theholyspirit/elevator-pitch-201j) (blog)
[Business Development](https://dev.to/theholyspirit/business-development-33i) (blog) | theholyspirit |
1,922,623 | Hire A Hacker Now: Easier than You Think | I'm glad I found INTELLIGENCE CYBER WIZARD, an honest funds/crypto recovery company. Their team of... | 0 | 2024-07-13T20:18:47 | https://dev.to/janet_sanchez_674329de08f/hire-a-hacker-now-easier-than-you-think-39l | I'm glad I found INTELLIGENCE CYBER WIZARD, an honest funds/crypto recovery company. Their team of professionals was able to retrieve my crypto that had been stolen from a forex trader who had deceived me by saying I would receive a 35% return on my investment. I was able to receive all of my cryptocurrency back after writing to this team about my situation in less than 24 hours. I was overjoyed because I had thought all hope had been lost after being duped. I highly recommend them with full confidence. File a complaint to this company to get your stolen cryptocurrency and other digital assets back. In addition, they can help you get back on more profitable trading platforms, recover forgotten or lost cryptocurrency wallet passwords, and protect you from extortionists. Speak with them through
E-mail: intelligencecyberwizard@gmail.com
WhatsApp: +216 53 126 882 | janet_sanchez_674329de08f | |
1,922,644 | Peek into Twitter Without Creating an Account | Twitter is a treasure trove of information, trends, and real-time updates. However, not everyone... | 0 | 2024-07-13T20:23:04 | https://dev.to/charlie_reece_f54ab06e4f4/peek-into-twitter-without-creating-an-account-9p5 | Twitter is a treasure trove of information, trends, and real-time updates. However, not everyone wants to go through the hassle of creating an account. Fortunately, you can explore Twitter without signing up. Here’s a comprehensive guide to help you navigate [Twitter ](https://bestsocialreviews.com/how-to-view-a-private-twitter-accounts-without-following/)without creating an account.
** 1. Why Browse Twitter Without an Account?
**
Many users prefer to browse Twitter anonymously for various reasons:
Privacy Concerns Some people are wary of sharing personal information.
Casual Browsing Users might only be interested in occasional updates.
Research Journalists, researchers, or marketers might need to monitor trends without actively participating.
Browsing Twitter without an account allows you to stay informed without compromising your privacy or cluttering your digital life with another account.
** 2. How to Access Twitter Without an Account
**
You can easily access Twitter without signing in by following these steps:
Direct URL Simply go to Twitter's homepage and use the search bar to find tweets, hashtags, or profiles.
Search Engines Use Google or another search engine to look for specific tweets or accounts. Include "Twitter" in your search query to refine results.
Third-Party Tools Websites like TwitScoop or TweetDeck can help you view Twitter content without logging in.
** 3. What You Can Do Without an Account
**
While browsing without an account has limitations, you can still:
View Tweets Read public tweets from profiles, search results, and trending topics.
Follow Hashtags Keep up with conversations by searching for specific hashtags.
Read Replies View replies to tweets and follow the thread of conversations.
Check Trends Stay updated with what's trending on Twitter in real-time.
However, you won’t be able to like, retweet, or comment on tweets without an account.
** 4. Tips for Effective Twitter Browsing
**
To make the most out of your Twitter browsing experience:
Bookmark Profiles Save URLs of your favorite profiles or hashtags for quick access.
Use Advanced Search Twitter's advanced search allows you to filter tweets by date, language, and more.
Monitor Trends Keep an eye on the "Trending" section to stay informed about popular topics.
Stay Anonymous Consider using private browsing or VPNs to maintain your privacy while exploring Twitter.
**FAQs**
Q1: Can I see private tweets without an account?
No, private tweets are only visible to approved followers. You need an account and permission from the user to view private tweets.
Q2: Is there a way to interact with tweets without an account?
No, interacting with tweets (liking, retweeting, or commenting) requires a Twitter account.
Q3: Are there any risks in browsing Twitter without an account?
Browsing Twitter without an account is generally safe. However, be cautious of third-party tools and websites that claim to offer additional access, as they may pose security risks.
| charlie_reece_f54ab06e4f4 | |
1,922,645 | Automate text Message(SMS) notification using SNS and AWS lambda | Introduction: Automating SMS notifications using AWS Lambda and SNS (Simple Notification Service) is... | 0 | 2024-07-13T20:23:05 | https://dev.to/rashmitha_v_d0cfc20ba7152/automate-text-messagesms-notification-using-sns-and-aws-lambda-26hg | **Introduction:**
Automating SMS notifications using AWS Lambda and SNS (Simple Notification Service) is a powerful way to keep users informed about important events or updates in your application. AWS Lambda allows you to run code without provisioning or managing servers, while SNS enables you to send messages to a large number of recipients simultaneously.
**working:**
It is a source where the file is uploaded, this s3 bucket is configurated to trigger AWS lambda. lambda contains a python code which which perform event reading mechanism and publish the fully framed messages to SNS topic.To the SNS topic we will make phone and become a subscriber to the SNS topic and msg is publishes that text will receive about the event.
**Architecture**
1. **AWS Amazon S3:**
- provide the name to the bucket.
- create a bucket.
2.**create a lambda function**
- provide the function name.
- use the runtime as python 3.9
- use the existing role
to change the setting click the configurations
- change the memory size
- change the timeout to reduce the cost
- click save
- click trigger
- add trigger select 's3 bucket'
- click event types and select "all object create events".
- click add
paste the lambda code in the code source.
```
import boto3
topic_arn = ""
def send_sns(message, subject):
try:
client = boto3.client("sns")
result = client.publish(TopicArn=topic_arn, Message=message, Subject=subject)
if result['ResponseMetadata']['HTTPStatusCode'] == 200:
print(result)
print("Notification send successfully..!!!")
return True
except Exception as e:
print("Error occured while publish notifications and error is : ", e)
return True
def lambda_handler(event, context):
print("event collected is {}".format(event))
for record in event['Records'] :
s3_bucket = record['s3']['bucket']['name']
print("Bucket name is {}".format(s3_bucket))
s3_key = record['s3']['object']['key']
print("Bucket key name is {}".format(s3_key))
from_path = "s3://{}/{}".format(s3_bucket, s3_key)
print("from path {}".format(from_path))
message = "The file is uploaded at S3 bucket path {}".format(from_path)
subject = "Processes completion Notification"
SNSResult = send_sns(message, subject)
if SNSResult :
print("Notification Sent..")
return SNSResult
else:
return False
```
- deploy the code and test the code.
3.**create the SNS topic**
- click the standard SNS topic.
- provide a name to the SNS topic.
- create a topic
arn code is generated this code is pasted in the lambda function before deploying and testing the code.
4.**create subscribers:**
- provide the ARN
- select the protocol(SMS)
- SNS endpoint - phone number
- click on text messages(SMS)
- click add phone number in - 'sandbox destination phone number'
- add phone no. , select the country and verify.
the phone is number is verified.
5. **Subscribe Phone Numbers:**
- create subscription
- choose topic.
- select sms phone number appears after verification.
upload a dummy file to the trigger point i.e S3 and notification pops as a text message sent to phone.
| rashmitha_v_d0cfc20ba7152 | |
1,922,646 | Red bearded dragon | Red Bearded Dragon: Exploring the Colorful World of Bearded Dragons Welcome to the fascinating world... | 0 | 2024-07-13T20:29:05 | https://dev.to/sunset_reptiles_8e1cf2bb0/red-bearded-dragon-2g31 | Red Bearded Dragon: Exploring the Colorful World of Bearded Dragons
Welcome to the fascinating world of bearded dragons, where these captivating reptiles come in a stunning array of colors and patterns. Whether you’re a seasoned reptile enthusiast or just beginning your journey, understanding the various types of bearded dragons and their mesmerizing hues can be an exciting exploration.
The Rainbow of Colors in Bearded Dragons
Bearded dragons are known for their diverse colors, ranging from subtle pastels to striking, vibrant shades. One of the most sought-after varieties is the red bearded dragon, which exhibits deep crimson tones that can intensify with age. These fiery dragons are prized for their rich coloration, making them a favorite among collectors.
On the other end of the spectrum, the blue bearded dragon captivates with its cool, icy hues that can range from sky blue to deep indigo. These dragons often exhibit a mesmerizing sheen, especially in certain lighting conditions, earning them the admiration of many reptile enthusiasts.
Exploring Bearded Dragon Morphs and Varieties
Bearded dragon enthusiasts often delve into the world of bearded dragon morphs, which are specific genetic variations that result in unique color combinations and patterns. Varieties like the blue flame red bearded dragon or the super red bearded dragon showcase intense red hues with varying degrees of brightness and saturation.
For those fascinated by contrasting colors, the black and red bearded dragon or the red and black bearded dragon for sale offer striking combinations that stand out in any collection. These dragons often feature bold patterns that highlight their distinctive coloration.
Types of Bearded Dragon Breeds and Their Unique Traits
Bearded dragon breeds like the orange bearded dragon or the fancy red bearded dragon are admired for their vibrant citrus hues or intricate patterns that add a touch of elegance to any terrarium. Each breed has its own charm, whether it’s the red citrus bearded dragon with its warm, citrusy tones or the blue bar bearded dragon with its distinct banding patterns.
Where to Find Your Perfect Bearded Dragon
Interested in adding a red bearded dragon for sale or a blue bearded dragon for sale to your collection? Visit Sunset Reptiles to explore our wide selection of high-quality bearded dragons. Whether you’re searching for a blue flame purple bearded dragon or a blue flame albino bearded dragon, we offer diverse options to suit every preference.
Discover more about red bearded dragon price ranges and explore detailed descriptions of blue morph bearded dragon varieties. Our commitment to providing healthy, well-cared-for dragons ensures that you’ll find your perfect companion at Sunset Reptiles.
For enthusiasts looking for something truly unique, consider a blue flame zero bearded dragon or a blood red bearded dragon to enhance your collection. Each dragon is meticulously bred to showcase its distinct characteristics and vibrant colors.
Conclusion: Embracing the Beauty of Bearded Dragons
Whether you’re drawn to the bold hues of a red and black bearded dragon for sale or the ethereal beauty of a blue flame bearded dragon for sale, exploring the diverse colors and varieties of bearded dragons is a rewarding journey. At Sunset Reptiles, we’re dedicated to helping you find the perfect dragon that matches your unique preferences and care requirements.
Begin your adventure into the world of colourful bearded dragons today. Visit Sunset Reptiles to learn more about our current inventory and expert care tips for these enchanting reptiles.
Underground Reptiles,
Wikipedia
Types and Morphs of Bearded Dragons
Normal/Wild Type Bearded Dragon: The standard appearance found in the wild, typically with sandy or grey-brown coloration.
Red Bearded Dragon: Known for its deep red or orange-red coloration.
Orange Bearded Dragon: Exhibits vibrant orange hues across its body.
Yellow Bearded Dragon: Features yellow or golden coloration.
Citrus Bearded Dragon: Has bright yellow or orange hues resembling citrus fruits.
Hypo/Translucent Bearded Dragon: Characterized by reduced dark pigmentation, resulting in a lighter appearance.
Dunner Bearded Dragon: Displays a specific pattern of stripes and dots along its back.
Leatherback Bearded Dragon: Has reduced scale size, giving it a smoother appearance.
Silkback Bearded Dragon: Lacks scales entirely, appearing smooth-skinned.
Witblits Bearded Dragon: A morph characterized by very light, almost white coloration.
Zero Bearded Dragon: Exhibits a combination of translucent and hypo traits, resulting in a lighter appearance.
Blue Bearded Dragon: Features shades of blue ranging from light blue to deep indigo.
Purple Bearded Dragon: Shows purple hues, often in combination with other colors.
Red X Citrus Bearded Dragon: Combines traits of red and citrus morphs.
Translucent X Hypo Bearded Dragon: A blend of translucent and hypo traits, resulting in a unique appearance.
Red Bearded Dragon
Red Bearded Dragon
Red Bearded DragonRed Bearded Dragon
Red Bearded DragonRed Bearded Dragon
| sunset_reptiles_8e1cf2bb0 | |
1,922,647 | How does Pix QRCode work? | Pix is the name of the instant payment scheme in Brazil. You can read more about Pix in English here... | 0 | 2024-07-15T12:43:29 | https://dev.to/woovi/how-does-pix-qrcode-work-5e3k | pix, qrcode, fintech, woovi | Pix is the name of the instant payment scheme in Brazil.
You can read more about Pix in English here [Brazil Central Bank Pix](https://www.bcb.gov.br/en/financialstability/pix_en).
Before we dive into how Pix QRCode works, we will cover a few other Pix concepts
## Pix Alias
The first concept that you need to learn about Pix is the concept of Alias or Pix Key.
A Pix alias enables you to associate a given key to a particular bank account, and if needed you could reassociate to another bank account.
A good association is that a bank account is like an IP and the Pix Alias is like a DNS, that will route the payment to the correct bank account.
Pix alias is managed by PSP (Payment Service Providers) using the [DICT API](https://github.com/bacen/pix-dict-api)
## Pix Charge
A Pix Charge is a payment request that accepts a single payment and it is used to reconcile a payment. Each Pix Charge has a unique `txid`.
If you want to receive a single payment and reconcile it, this is the preferred method.
You can check the charge status and also receive a webhook when the charge is paid.
## Pix Location
A location is an endpoint that contains charge information.
You can modify a location to point to another charge.
This makes it possible to print a QRCode that will show different charge information based on the system or payer.
## Pix QRCode
Pix QRCode is called BR Code.
BR Code uses the standard EMV (Europay, Mastercard, and Visa).
The same standard as the payment cards.
EMV uses TLV to store information
Here is an example of `BR Code`
```
00020101021226910014br.gov.bcb.pix2569qrcodes.fiduciascm.digital/v1/qr/ded35b9c-fdf8-4789-ba97-24f26cc9327252040000530398654041.005802BR5910Woovi_Demo6009Sao_Paulo6229052544e554f94d8a4d4cb72a1848f630470AA
```
If you render this BR Code in a QRCode and scan it in your Brazil payment app will be able to pay it, only if somebody has not paid it yet. Can you be the first one?
We can have 2 types of QRCodes, one that uses a Pix Key and another one that uses a Pix Location.
When using the Pix Key in the QRCode you can have an identifier in the QRCode to group many payments.
When using a Pix Location the bank while reading the QRCode will fetch the last information about the charge from the location endpoint.
## Reading the BR Code
We built a [BR Code decoding tool](https://openpix.com.br/qrcode/debug/).
We can see that this BR Code is using a location `qrcodes.fiduciascm.digital/v1/qr/ded35b9c-fdf8-4789-ba97-24f26cc93272`
If you download the content of this location you will get a JWT payload
```
eyJhbGciOiJQUzUxMiIsImtpZCI6IkJGRUVBM0Q4ODA4NzYyNkY0QTJBNUEyNUVGMkU0NTMxNzAwRTM3MzkiLCJ4NXQiOiJ2LTZqMklDSFltOUtLbG9sN3k1Rk1YQU9OemsiLCJ0eXAiOiJKV1MiLCJqa3UiOiJodHRwczovL3FyY29kZXMuZmlkdWNpYXNjbS5kaWdpdGFsLy53ZWxsLWtub3duL2p3a3MifQ.eyJjYWxlbmRhcmlvIjp7ImV4cGlyYWNhbyI6MzE1NjExMzAsImNyaWFjYW8iOiIyMDI0LTA3LTEzVDIwOjAwOjExLjAzMVoiLCJhcHJlc2VudGFjYW8iOiIyMDI0LTA3LTEzVDIwOjAwOjExLjAzMVoifSwidmFsb3IiOnsib3JpZ2luYWwiOiIxLjAwIiwibW9kYWxpZGFkZUFsdGVyYWNhbyI6MH0sInJldmlzYW8iOjAsImNoYXZlIjoiYTUyNzc4YWMtYTBjMS00MTBkLTgwMjgtZTk3YjE3ZDU3NGJjIiwidHhpZCI6IjQ0RTU1NEY5NEQ4QTRENENCNzJBMTg0OEYzQjRDNUM5Iiwic3RhdHVzIjoiQVRJVkEifQ.oYCkb-u8cZqo0ISPL9Ny29vDs8LlneYE1X9TnbEUfF3fzPFl3SY-2P7lYjcenPnSPUbWaDV0F4LIkcaXpTIWoHbdZWQJnrgn5anPTgNOUXo4GCvjpkNLGVLlz6WPUU3buwPeRt8cuGvjxSj0kLMlxTmrfLt-xW7J1kPNKwviMU2rMkXUfP225YZiAhMfNlPJ7oGi14ov1AnOyN2OAbbekoEKgqCX3lCnFo9GFDUqVMdoxvNGKHKIaqt2clRf265_0DiIhNBUZWgb8bM15SJLTGhADJAhoVcISXbRvhFIIy8loMkNNOhwUmP5HZm45RuNnr9XQoKr-h-74ROMWRY3KQ
```
```tsx
{
"alg": "PS512",
"kid": "BFEEA3D88087626F4A2A5A25EF2E4531700E3739",
"x5t": "v-6j2ICHYm9KKlol7y5FMXAONzk",
"typ": "JWS",
"jku": "https://qrcodes.fiduciascm.digital/.well-known/jwks"
}
```
The JWT header gives you the jku with the JWKS location URL that you need to use to validate the JWT against the certificates.
Only valid certificates from PSP with licenses are accepted by the banks.
```tsx
{
"calendario": {
"expiracao": 31561130,
"criacao": "2024-07-13T20:00:11.031Z",
"apresentacao": "2024-07-13T20:00:11.031Z"
},
"valor": {
"original": "1.00",
"modalidadeAlteracao": 0
},
"revisao": 0,
"chave": "a52778ac-a0c1-410d-8028-e97b17d574bc",
"txid": "44E554F94D8A4D4CB72A1848F3B4C5C9",
"status": "ATIVA"
}
```
The body payload contains the Pix Charge information like value, and payer, and could also have discounts, interests, and fines.
`txid` is the unique identifier of this Pix Charge.
When the Pix Charge is paid a transaction is generated with the same `txid` to be able to reconcile.
## In Conclusion
I hope this article gives you more technical details of how Pix works.
Pix is a huge success in Brazil.
Brazil Central Bank is working on more improvements to Pix, and Open Finance to enable even more use cases like Pix Automatic that could replace installments with credit cards.
If you want to play with Pix go to [Woovi demos](https://woovi.com/demo/) and decode some BR Codes.
If you are not from Brazil and want to get more insights about Pix, send me a message.
## References
[https://github.com/bacen/pix-api](https://github.com/bacen/pix-api)
[https://github.com/bacen/pix-dict-api](https://github.com/bacen/pix-dict-api)
[Pix API](https://developers.openpix.com.br/pix)
[QRCode Debug](https://openpix.com.br/qrcode/debug/)
[EndToEndId Debug](https://openpix.com.br/debug/endToEndId/)
[QRCode Render](https://openpix.com.br/qrcode/render/)
---
Woovi
[Woovi](https://www.woovi.com) is a Startup that enables shoppers to pay as they like. Woovi provides instant payment solutions for merchants to accept orders to make this possible.
If you want to work with us, we are [hiring](https://woovi.com/jobs/)! | sibelius |
1,922,659 | WordPress 6.6: What’s new for developers? news in july 10th | What’s new for developers? (July 2024) By Justin... | 0 | 2024-07-13T21:20:19 | https://dev.to/hub24/wordpress-66-whats-new-for-developers-news-in-july-10th-2kk9 | What’s new for developers? (July 2024) By Justin Tadlock
https://developer.wordpress.org/news/2024/07/10/whats-new-for-developers-july-2024/
What’s new for developers? (July 2024) By Justin Tadlock
July 10, 2024
covering: Blocks, Plugins, Themes
WordPress 6.6 is just days away, and it’s always an exciting time for developers when a new major release ships. There are lots of new features to tinker with and handy updates to make extending and using WordPress just a little nicer.
Officially, version 6.6 is expected to ship on July 16, 2024 (read the development cycle timeline for more information).
If you haven’t already done so, now is a great time to test your plugins and themes against the latest changes. WordPress 6.6 RC 3 is the most up-to-date version to check out.
Also, be sure to read the Field Guide, which covers all the major changes you should know about. It has links to all the Developer Notes and a breakdown of what happened during the development cycle.
As usual, this post will contain a list of development-related changes in the past month. Be sure to test them while using WordPress and Gutenberg trunk. Some of the features and changes listed below, unless otherwise noted, are under development and won’t be released until WordPress 6.7.
mehr Infos, Hintergründe
WordPress 6.6 with Anne McCarthy
https://youtu.be/MRUAzefDhjI
Plugins and tools - WordPress 6.6 developer notes
There are several dev notes for WordPress 6.6 that cover new features, updated APIs, and progress on experimental features:
Custom post type actions with Data Views
A new API in Gutenberg 18.6 lets you register and unregister post type actions when building custom Data Views. Currently, these actions appear in two places in the UI:
Site Editor views
Sidebar in the Post or Site Editor
The API is currently a part of the Editor package but will likely be moved to a dedicated package in the future.
JSON Schema for .wp-env.json
.wp-env.json files now have JSON Schema support, which you can define via the standard $schema property. This should make it easier to validate your JSON code in your preferred code editor.
Block Bindings API bug fixes
Several important bug fixes landed for the Block Bindings API:
Reverted a change that caused values beginning with a number to break.
Applied a fix for the Site Editor breaking when selecting bound and unbound blocks.
Corrected an issue where Button blocks with empty content would not work within bindings.
Themes
WordPress 6.6 developer notes
That latest WordPress release will include many theme-heavy features and enhancements. Be sure to read through the dev notes to catch up before 6.6 goes live:
WordPress 6.6 is changing the game for Custom Fields
https://www.youtube.com/watch?v=YNtHywyxWdc
WordPress is bringing Custom Fields to blocks. The Block Bindings API is going to change the way we code for postmeta, and WordPress 6.6 is our first glimpse.
| hub24 | |
1,922,648 | Data Migration from Digital Ocean Space to AWS S3 | This guide illustrates the migration process for moving objects from Digital Ocean (DO) Space to AWS... | 0 | 2024-07-13T20:30:08 | https://dev.to/sammy_cloud/data-migration-from-digital-ocean-space-to-aws-s3-4m85 | This guide illustrates the migration process for moving objects from Digital Ocean (DO) Space to AWS S3
DigitalOcean Spaces provides Amazon S3-compatible object storage with a simplified pricing model. However, you may at some point find that you need to move your storage off of Spaces and onto Amazon S3. There are many tools that can be to achieve this purpose e.g. AWS Datasync, rclone, and some other third party tools, however using the AWS Datasync requires a complex setup and also come at price for the Data transfer and payment for the use of Datasync. In this guide we will be using rclone to automate the migration of data from Spaces to S3 quickly and easily.
Follow the below steps to setup and migrate data between DO space and AWS S3:
The first thing to do is to install rclone on the computer (Linux/Mac) from where the sync is going to run using the command below
```
curl https://rclone.org/install.sh | sudo bash
```
Or, you can install on Mac using Homebrew:
```
brew install rclone
```
On Windows systems, download and install the appropriate executable from the `https://rclone.org/downloads/` Rclone site. Make sure to add rclone to your system's PATH afterward so that the subsequent commands in this tutorial work.
Obtaining Your Spaces Connection Information
To use Rclone to perform the copy, you'll need to create an rclone.conf file that enables Rclone to connect to both your AWS S3 bucket and to your Spaces space.
You will need two pieces of information from Spaces and also AWS Credentails:
The URL to the endpoint for your Space
An access key and secret key from DigitalOcean provides access to your Space.
AWS access Key and Secret Key
Obtaining your Spaces endpoint is easy: just navigate to your Space in DigitalOcean, where you'll see the URL for your Space. The endpoint you'll use is the regional endpoint without the name of your space (the part highlighted in the red rectangle below):
Also generate the Access and Secret Key on AWS IAM console, once gotten all the required information, do the following to configure rclone:
The following rclone configuration must then be added
```
mkdir -p ~/.config/rclone
vim ~/.config/rclone/rclone.conf
```
In my case, we are going to generate two “Keys”, one for the Digital Ocean Storage and the other for the AWS S3.
```
[bucket-DO]
type = s3
env_auth = false
access_key_id = access_key_id
secret_access_key = secret_access_key+2xtDf01C++eF5WeJ0QXc
endpoint = endpoint.digitaloceanspaces.com
acl = private
[bucket-aws]
type = s3
env_auth = false
access_key_id = access_key_id
secret_access_key = secret_access_key+veqrlo8cPOz
region = us-east-1
acl = private
```
Finally we will give the necessary permissions to the configuration file.
```
chmod 600 ~/.config/rclone/rclone.conf
```
Validate that rclone can access the two remote storages
```
rclone listremotes
```
We run the synchronisation of the storages, in our case from DigitalOcean to AWS.
```
rclone sync bucket-DO: bucket-aws:
```
Congratulations the file synchronisation has now started, you can goto your AWS S3 Bucket to confirm the object synchronisation. | sammy_cloud | |
1,922,649 | Foodz | This is a submission for the Wix Studio Challenge . What I Built Are you hungry? Up to... | 0 | 2024-07-13T21:00:00 | https://dev.to/yowise/foodz-3b8p | devchallenge, wixstudiochallenge, webdev, javascript | *This is a submission for the [Wix Studio Challenge ](https://dev.to/challenges/wix).*
## What I Built
<!-- Share an overview about your project. -->
Are you hungry? Up to try something new? Luxembourgish and Danish dishes have your back...I mean stomach! Now, a round of applause for Foodz!
## Demo
<!-- Share a link to your Wix Studio app and include some screenshots here. -->
Inside Foodz: https://gowonder1.wixstudio.io/foodz
Fine, I'll be a spoiler.
## Development Journey
<!-- Tell us how you leveraged Wix Studio’s JavaScript development capabilities-->
I used the onClick Javascript function to redirect to Online Order page (seen as "Delivery"). :
```
import wixLocation from 'wix-location';
import wixWindow from 'wix-window';
$w.onReady(function () {
$w("#box4").onClick(() => {
wixLocation.to("/online-ordering");
});
});
```
The almost same effect can be achieved by creating a link without using any code. This is how I implemented the redirect to Surprise box page. I mentioned almost, because if one does not use the JavaScript code above, the text (i.e Surprise box) is not clickable. Only the box itself is linked to the redirect page.
<!-- Which APIs and Libraries did you utilize? -->
Wix eCommerce API and Wix Stores are at the center of the website. Wix Restaurant Orders and Wix Stores are the applications used from App Market.
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
<!-- Don't forget to add a cover image (if you want). -->
I invite you to have a taste from these delicious cuisines. 🍽️ | yowise |
1,922,652 | Shiny Object Syndrome: Code Edition | Imagine a little kid going to a toy store. This kid has a ton of options to choose from, and let's... | 0 | 2024-07-13T20:52:27 | https://blog.atharva.codes/shiny-object-syndrome-code-edition | codenewbie, latest |
Imagine a little kid going to a toy store. This kid has a ton of options to choose from, and let's forget about the budget for the desired toy. He will roam around the store to find the most exciting thing to play with. He will find one cool Superman toy and quickly grab it. While going back to the counter to finalise the purchase, he would see an RC car. Now, this would be a more exciting choice for him as this is something he has probably never tried before. So, he picks the RC car instead. While moving towards the counter, he finds an RC drone, picks it up and drops the car. Similarly, he gets attracted to many things along the way. The store closes, and the kid turns out not to have made a choice and has nothing in hand while leaving the store.
Do you see the problem here? I see it clearly. The kid had no budget constraint, so he decided to use this opportunity ideally and get the best toy he could enjoy. But he ran out of time and had to go back home empty-handed. He was attracted to every other toy and couldn't make a conclusive decision.
This is called the **shiny object syndrome**, and it's not just limited to kids or general topics. It also happens in code and a lot more often than you think. This article will examine how a passionate developer gets caught in the shiny object syndrome, how it keeps getting worse and the steps they can take to overcome and escape it.
## In code? How exactly?
Developers in this modern era (including myself) often get caught in this. Shiny object syndrome might not necessarily be bad, but for a particular group of developers, it absolutely is, and we will talk about it in this section.
In this modern era, where information is abundant and accessible to developers, we have many choices around us. While scrolling through Tech Twitter (or Tech X), we are bombarded with the latest and greatest news in your favourite field of programming. Especially, if you are a JavaScript developer, you know what I mean.
Everyday, you might find a new framework launching, different people talking about how the framework of their choice is better than the other framework, how is going scratch much better than a framework & vice versa. Then there are feature releases in the newest frameworks that seem like "the thing" which attracts you towards it.
Not targetting anyone, but for example, the Next.js app router is one such case. It's something exciting, somewhat new, so developers naturally get attracted towards all these new things and start to get their hands dirty. Then there are other features that the team keeps putting out that keep attracting you towards them. Then there are other frameworks doing their own innovation and again, you get attracted to them. For someone who is well-versed with programming and knows what he/she is doing, this could be beneficial for them as they get to learn new things regularly, and it's often said that in tech, staying up to date is the key.
But then, there are beginners who also get inside this loop and keep changing their mind about what they want to learn. For beginners, the loop could also be the question of "which programming language to learn?", which they will never figure out as they would keep comparing between the language instead of picking one and learning it. At the end, it's just a waste of time and there's nothing productive the beginner does.
I believe that for a beginner (who is currently not familiar with ANY technology), the priority should be to learn a technology, understand the fundamentals, and then move on to the newest stuff and reason themselves whether the new features are for them or not.
Most of the time, the beginner undergoing this process doesn't even know he/she is trapped under this syndrome, and that's the worst part.
## Root cause and why is it unavoidable?
Believe it or not, the root cause of this "shiny object syndrome" is **innovation**. Now, don't get me wrong, I'm not one of those people who believe that innovation is the root of all evil. In fact, I'm pro-innovation. I think that this syndrome is some kind of side effect of innovation which we cannot escape unconsciously.
If innovation stops, the world stops developing, and it's definitely not the best state to be in. Innovation improves things. That leaves us in a very tough spot because we cannot eliminate the things that cause the shiny object syndrome.
However, there are measures to delay the syndrome (if you are a beginner) and get your fundamentals cleared before jumping onto the next big thing.
## The solution
Here are a few things you could do if you are a beginner (or someone who feels distracted while learning to code) to avoid the shiny object syndrome somewhat:
* If you are a complete beginner, make sure you create a curriculum in place before jumping to learn. I usually oppose the idea of picking a set curriculum. I could be called a hypocrite here for that. However, I think you should "create" your own curriculum and stick to it if you have issues with committing to some technology during your learning process. Make sure you build projects, too, as these bring you to test your skills.
* Social media cannot be ignored if you're a developer. You will keep seeing new stuff, especially on X. The chances of you giving in to the latest & exciting things you see are very high. You can't really blame yourself for trying to learn something new, can you? I think there's one way- giving yourself a set time to learn all the newest innovations. I think I'd go with 2:1 when dividing time between learning something that would clear your fundamentals (something you'd want to learn long term) and something new you want to learn.
* Don't be too optimistic about new tech: as much as I understand your urge to get on the ship of learning and using the latest, it's not the best decision because a lot of the times the technology ends up being redundant or not-that-useful. I look at three things before picking up a new thing- the community backing up the technology, any future use-cases specific to the technology and the current age of the technology. If something just launched, I might wait for a few people to get on if the previous two factors turn out to be a negative outcome.
I think these three points could help you avoid *shiny object syndrome*. Again, it's almost impossible to escape the loop caused by this syndrome if you are a particularly passionate developer.
## Conclusion
In this article we saw how the *shiny object syndrome* plays out for developers passionate about code and the steps they could potentially take to avoid getting trapped in a loop where they learn nothing.
If you would like to add two cents to this article, feel free to comment below. By the way, I also run my own YouTube channel, so if you want coding tutorials mainly in the web development space, make sure you subscribe me there!
Have a nice day, everyone! | atharvadeosthale |
1,922,653 | Understanding Threat Modeling: 🛡️ Securing Your Digital Assets Effectively | Intro Hello World! 👋 I'm Makita, founder of a tech business based in vibrant Florida, deeply... | 0 | 2024-07-13T20:53:33 | https://dev.to/firststeptechnology/understanding-threat-modeling-securing-your-digital-assets-effectively-27gp | threatmodeling, devsecops, cybersecurity, learning | **Intro**
Hello World! 👋 I'm Makita, founder of a tech business based in vibrant Florida, deeply passionate about cybersecurity and safeguarding digital assets. Currently pursuing a Cyber Juris Master's program at the great Florida State University, I've delved into the critical importance of threat modeling beyond its DevOps applications. Let's explore why threat modeling is pivotal for protecting your digital assets from various security threats.
**What is Threat Modeling?**
Threat modeling is a structured approach used to systematically identify and evaluate potential security threats to a system, application, or network. It involves understanding the environment, assets, potential vulnerabilities, and threat actors that could exploit those vulnerabilities. By mapping out potential attack vectors and analyzing their impact, organizations can prioritize and implement effective security measures.
**Why Does Threat Modeling Matter?**
In today's interconnected world, where cyber threats continue to evolve, understanding and mitigating risks is paramount. Threat modeling offers several key benefits from a security standpoint:
• Risk Awareness: Enhances the organization's understanding of its security posture by identifying and quantifying potential risks and vulnerabilities.
• Proactive Security: Identifies threats early in the design phase, enabling organizations to implement security controls proactively.
• Resource Optimization: Allows organizations to allocate resources effectively by focusing on high-priority security issues based on their impact and likelihood.
**Components of Threat Modeling**
Effective threat modeling typically involves:
• Asset Identification: Prioritizing assets that need protection, such as sensitive data or critical infrastructure.
• Threat Identification: Analyzing potential threat actors, their motivations, and methods they might use to exploit vulnerabilities.
• Vulnerability Assessment: Identifying potential weaknesses in systems or applications that could be exploited.
• Risk Assessment: Evaluating identified threats and vulnerabilities to assess their potential impact and likelihood.
Implementing Threat Modeling
Implementing threat modeling doesn't require extensive technical expertise. Organizations can start by adopting frameworks like STRIDE (Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, Elevation of Privilege) or DREAD (Damage, Reproducibility, Exploitability, Affected Users, Discoverability). Tools such as Microsoft Threat Modeling Tool or OWASP Threat Dragon can facilitate these exercises.
**My Conclusion**
In conclusion, threat modeling isn't just a buzzword—it's a foundational approach to enhancing cybersecurity resilience across organizations. By systematically identifying and mitigating potential security threats, organizations can safeguard their digital assets, protect sensitive information, and maintain trust with stakeholders. Embracing threat modeling as a core practice empowers organizations to stay ahead of emerging threats and secure their digital future effectively. 🌟 You can check the link below for an awesome resource regarding Threat Modeling. I ordered the book from Amazon. If you have not threat modeled your environment, you can feel free to reach out to me. I’m happy to help.
References: https://www.amazon.com/dp/0735619913?psc=1&ref=product_details
| firststeptechnology |
1,922,656 | What is DTO? Why use? | Hello everyone, I'm Jean and I'm here to bring you an article about DTO. This is just theory, and... | 0 | 2024-07-13T21:02:48 | https://dev.to/jeanv0/what-is-dto-why-use-5foj | webdev, java, solidprinciples, dto | Hello everyone, I'm Jean and I'm here to bring you an article about DTO. This is just theory, and there will be no practical code. I hope you enjoy it!
## Introduction
DTO, or "Data Transfer Object," as the name suggests, is an object used to send and receive data. It is typically used in the backend of more structured applications.
## But why use DTO?
DTO is a way to simplify and separate, providing several benefits such as:
1. **Encapsulation**: Based on clean architecture and SOLID principles, it is a way to group/limit data for better organization and separation from business logic and other layers.
2. **Coupling reduction**: By reducing coupling, there is better control over code maintenance and scalability, in addition to enabling testing and other types of manipulation.
3. **Security and control**: By better separating and controlling data, it is possible to implement validators, security and validation systems, and reduce leaks of sensitive information.
4. **Performance**: Although in some cases there is no direct improvement, the use of DTOs allows for better control and reduction of unnecessary data, resulting in smaller network packets and potentially improving performance.
5. **Ease of testing**: By isolating parts of the system, it is possible to simulate scenarios (mock), carry out isolated tests, and have better visibility of the data flow.
## How to use it?
There are several ways of implementation, and here are some examples in different languages:
1. **JavaScript**: [DTOs in JavaScript](https://dev.to/tareksalem/dtos-in-javascript-118p)
2. **TypeScript**: [Simplifying DTO Management in Express.js with Class Transformer](https://dev.to/mdmostafizurrahaman/simplifying-dto-management-in-expressjs-with-class-transformer-56mh)
3. **Rust** (Reddit): [Are DTOs and Entities the Right Way?](https://www.reddit.com/r/rust/comments/174o3ph/are_dtos_and_entities_the_right_way/)
## When to use DTO?
I listed some contexts to explain why to use DTO:
- **Web service applications**: Better control of the data flow to receive and return information, establishing a clear contract between client and server.
- **Distributed systems**: In microservices and API architectures, it is beneficial to control and gain better insight into the system, as well as reducing latency due to decreased network traffic.
## Conclusion
DTO is an excellent way to organize, separate, optimize, test, and perform several other tasks within an application. The concept is similar to GRPC, which also uses a well-defined structure. Anyway, I hope you liked it. | jeanv0 |
1,922,660 | How to add new Node version to Laragon | It is very easy and straight-forward to add new node version into your Laragon. In this blog, I’m... | 0 | 2024-07-13T21:31:32 | https://dev.to/fullstackhardev/how-to-add-new-node-version-to-laragon-5hjh | programming, javascript, softwareengineering, webdev | > It is very easy and straight-forward to add new node version into your Laragon.
In this blog, I’m currently having Node 16.13.1 installed & we will be installing latest Node 20 version, let’s do it together.
Steps to add new or any Node version are following:
1. Lets download the [node binary](https://nodejs.org/en/download/) you want to install from Node’s official website. ([Direct download link for latest version 20](https://nodejs.org/dist/v20.11.1/node-v20.11.1-win-x64.zip))
2. For older versions, you can find your specific version [here](https://nodejs.org/en/about/previous-releases).
3. Extract the downloaded file.
4. Move the extracted folder into `C:\laragon\bin\nodejs`. You folder structure should look like below:
5. Now you can right click on Laragon app icon from task bar, then you can choose your new Node version.
6. After choosing newer version, open Laragon app by doing single click on Laragon icon from taskbar.
7. Now click on Stop, then click on Start All to initate Laragon with our new NodeJs version.
8. Now to verify, open Terminal or Cmder from Laragon app & enter the below command
```
node -v
```
Here you will see your new node version like below:
I hope this process is very simple and straight forward for everyone, if anyone is having any problem, you can comment on this post and I will help you upgrade your Node version.
For more tech or development related blog posts, follow me.
Thanks for reading this post.
Hardev Singh
Fullstack Developer | fullstackhardev |
1,922,661 | From Zero to K8s Hero: 5 Must-Have Tools for Kubernetes | I have just finished publishing my latest article, "From Zero to K8s Hero: 5 Must-Have Tools for... | 0 | 2024-07-13T21:34:17 | https://dev.to/cloudnative_eng/from-zero-to-k8s-hero-5-must-have-tools-for-kubernetes-4hia | kubernetes, devops, beginners, computerscience |
I have just finished publishing my latest article, "From Zero to K8s Hero: 5 Must-Have Tools for Kubernetes"
Topics:
• 👓 1. Browse your Kubernetes cluster: K9s.
• 🤖 2. Automate everything: Kubectl
• 📦 3. Package manager: Krew
• 🪵 4. Aggregate logs from multiple Kubernetes resources: Stern
• 🐚 5. Look under the hood: node-shell
Read the full article for detailed insights at https://cloudnativeengineer.substack.com/p/5-must-have-tools-for-kubernetes
--
Are you ready to take your skills to new heights? 🚀
🚢 Let's embark on this journey together!
👣 Follow me on LinkedIn and Twitter/X for valuable content on AI, Kubernetes, System Design, Elasticsearch, and more.
📬 Be part of an exclusive circle by subscribing to my newsletter on Substack.
🎓 If you are looking for personalized guidance, I am here to support you. Book a mentoring session with me at [https://mentors.to/gsantoro](https://mentors.to/gsantoro) on MentorCruise, and let's work together to unlock your full potential.
♻️ Remember, sharing is caring! If this content has helped you, please re-share it with others so they can benefit from it.
🤩 Let's inspire and empower each other to reach new heights! | cloudnative_eng |
1,922,662 | Follow me for supporting me thanks 🙏🙏 | A post by Marjorie Capistrano | 0 | 2024-07-13T21:39:14 | https://dev.to/marjorie_capistrano_7c927/follow-me-for-supporting-me-thanks-4lbf | beginners, webdev, react, javascript | marjorie_capistrano_7c927 | |
1,922,663 | PELISFLIX-VER » IntensaMente 2 PELÍCULA COMPLETA Español Latino | [PELISPLUS] Ver IntensaMente 2 (2024) PELICULACOMPLETA Online En Español ➤➤🔴✅📱 Descargar 🔴✅➤➤... | 0 | 2024-07-13T21:54:10 | https://dev.to/pelisflix-ver/pelisflix-ver-intensamente-2-pelicula-completa-espanol-latino-3ofl | webdev, javascript, programming, tutorial | [PELISPLUS] Ver IntensaMente 2 (2024) PELICULACOMPLETA Online En Español
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Cuevana | Estrenos | Pelispedia | Pelisplus | Gnula | Repelisplus | Repelis | Pelis | Pelisplus| | Netflix | Cine | Cinema | Calidad | Mejor | Chile
Visión de conjunto:
Vuelve a la mente de Riley, quien acaba de convertirse en adolescente, en el momento en que la Central se enfrenta a una reforma para hacer sitio a algo completamente inesperado: ¡nuevas Emociones! Alegría, Tristeza, Ira, Miedo y Asco, que llevan muchos años al mando de una operación exitosa, no saben muy bien qué sentir cuando aparece Ansiedad, que además no ha llegado sola. Se ha traído a Vergüenza, Envidia y Ennui.
Género : Animación, Familia, Aventura, Comedia
Emitir : Amy Poehler, Maya Hawke, Kensington Tallman, Liza Lapira, Phyllis Smith, Lewis Black
Lanzamiento : 2024-06-11
Tiempo de ejecución : 97 minutos.
descripción de la película
Secuela de la película Del revés (Inside Out), ganadora del Óscar en 2016 a Mejor filme de animación. Alegría, Tristeza, Ira, Asco y Miedo están de vuelta. Pero ahora, en plena adolescencia, están pasando muchas cosas dentro del cuerpo de Riley. La niña que conocimos ahora es una chica que se está haciendo mayor y sus emociones serán un cóctel explosivo. En esta nueva aventura que tiene lugar dentro de la mente de Riley aparecerán nuevas emociones que lo cambiarán todo, como Ansiedad, Envidia, Hastío o Vergüenza. Estas nuevas emociones llegarán al centro de control y lo pondrán todo patas arriba, así que Alegría y su equipo van a tener mucho trabajo.
revisar películas al día
“Inside Out 2” de Disney y Pixar regresa a la mente del recién creado adolescente Riley justo cuando la sede central está sufriendo una repentina demolición para dejar espacio a algo completamente inesperado: ¡nuevas emociones! La alegría, la tristeza, la ira, el miedo y el asco, que llevan mucho tiempo dirigiendo una operación exitosa en todos los sentidos, no están seguros de cómo sentirse cuando aparece la ansiedad. Y parece que no está sola.
Maya Hawke presta su voz a Anxiety, junto a Amy Poehler como Joy, Phyllis Smith como Sadness, Lewis Black como Anger, Tony Hale como Fear y Liza Lapira como Disgust. Dirigida por Kelsey Mann y producida por Mark Nielsen, “Inside Out 2” se estrenará solo en cines en el verano de 2024.
Joy ha vuelto y está lista para afrontar la adolescencia: los altibajos de alegría, los altibajos llenos de lágrimas, las frustraciones abrasadoras, los cambios nauseabundos y los momentos terriblemente incómodos que el nuevo mundo adolescente de Riley tiene para ofrecer. Con la felicidad de Riley como su primera prioridad, Joy está decidida a proteger el sentido de sí mismo de Riley y ayudarla a seguir siendo la misma niña feliz que conoce y ama. Optimista, alegre y llena de ideas brillantes para el futuro de su hija, nada descarrilará el plan de Joy para la sede, es decir, hasta que surjan nuevas emociones.
Anxiety, un manojo de energía agotada, garantiza con entusiasmo que Riley esté preparado para cualquier posible resultado negativo. Al proteger a la nueva adolescente de los peligros que no puede ver, Anxiety está decidida a asegurarse de que Riley encaje con sus compañeros de secundaria a toda costa. Armado con listas meticulosamente organizadas y planes para asegurarse de que Riley nunca cometa un error, Anxiety piensa diez pasos por delante y no tiene reparos en compartir los peores escenarios. La ansiedad sabe que tiene mucho con qué lidiar, pero siente que empujar a Riley hacia la perfección significa estar mucho más cerca de lograr sus objetivos.
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1,922,689 | Assistir!! DIVERTIDA-MENTE 2 (2024) FILME COMPLETO Dublado em Portuguêse~HD-4K | Assistir!! DIVERTIDA MENTE 2 FILME COMPLETO Dublado e Legendado em Portuguêse (2024)~4K 🔴➡ ASSISTIR... | 0 | 2024-07-13T22:21:58 | https://dev.to/baixarfilmes2/assistir-divertida-mente-2-2024-filme-completo-dublado-em-portuguesehd-4k-32m1 | webdev, beginners, github, website | Assistir!! DIVERTIDA MENTE 2 FILME COMPLETO Dublado e Legendado em Portuguêse (2024)~4K
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Inside Out 2 (Divertida Mente 2) é um filme de ação e ficção científica dirigido por Wes Ball a partir de um roteiro de Friedman, Rick Jaffa e Amanda Silver e Patrick Aison, e produzido por Joe Hartwick Jr., Jaffa, Silver e Jason Reed. Produzido e distribuído pela 20th Century Studios, pretende ser a sequência de War for the Planet of the Apes (2017) e o quarto filme do reboot da franquia Planet of the Apes. É estrelado por Teague no papel principal ao lado de Freya Allan, Peter Macon, Eka Darville e Kevin Durand.
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Os jogadores que desempenham papéis em filmes são chamados de atores (homens) ou atrizes (mulheres). Existe também o termo “extra”, que é usado como um papel secundário no filme com poucos personagens. Isso é diferente do papel principal, que está se tornando cada vez mais importante. Como ator, deve-se ter o talento de atuação correspondente ao tema do filme em que desempenha o papel principal. Em algumas cenas, o papel do ator pode ser substituído por um dublê ou dublê. A presença de atores substitutos é importante para substituir atores que interpretam cenas difíceis e extremas, normalmente comuns em filmes de ação.
Os filmes também podem ser usados para transmitir certas informações sobre o produtor do filme. Algumas indústrias também usam filmes para transmitir e representar seus símbolos e cultura. A produção de filmes também é uma forma de expressão visual, pensamentos, ideias, conceitos, sentimentos e emoções em filmes. Os filmes em si são em sua maioria fictícios, embora alguns sejam baseados em histórias reais ou histórias reais.
Existem também documentários com imagens originais e reais ou filmes biográficos que contam a história de uma personagem. Existem muitos outros tipos populares de filmes, incluindo filmes de ação, filmes de terror, comédias, filmes românticos, filmes de fantasia, thrillers, filmes de drama, filmes de ficção científica, filmes policiais, documentários, etc.
Estas são algumas informações sobre filmes ou a definição de filmes. Essas informações foram citadas de várias fontes e referências. Espero que seja util.
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Seu primeiro programa de TV foi experimental, esporádico e, desde a década de 1930, só pode ser assistido bem perto do mastro. Programas de TV, como os Jogos Olímpicos de Verão de 1936 na Alemanha, onde o rei George VI foi coroado. No Reino Unido em 19340 e com o lançamento do famoso David Sarnoff na Feira Mundial de Nova York em 1939, esse meio continuou a se desenvolver, mas a Segunda Guerra Mundial paralisou seu desenvolvimento após a guerra. O filme mundial de 19440 inspirou muitos americanos, e eles compraram a primeira televisão. Em 1948, a popular estação de rádio Texaco Theatre tornou-se o primeiro programa de variedades semanal da TV. O programa apresentava Milton Berle e recebeu o título de “Mr. TV”, provando que Este tipo de mídia é estável e pode atrair anunciantes em formas modernas de entretenimento . Em 4 de setembro de 1951, a primeira transmissão nacional de televisão ao vivo nos Estados Unidos, quando o presidente Harry Truman (Harry Truman) fez um discurso sobre o cabo transcontinental da AT&T e o sistema de retransmissão de microondas no Tratado de Paz do Japão em São Francisco, ele já havia falado com o mercado local Empresa de radiodifusão. sim
❍❍❍ Formatos e gêneros ❍❍❍
Veja também: Lista de gêneros § Formatos e gêneros de cinema e televisão. Os programas de televisão são mais variados do que a maioria das outras formas de mídia, devido à grande variedade de formatos e gêneros que podem ser apresentados. Um programa pode ser fictício (como em comédias e dramas) ou não fictício (como em documentários, notícias e reality shows). Pode ser tópico (como no caso de um noticiário local e alguns filmes feitos para a televisão) ou histórico (como no caso de muitos documentários e FILMES fictícios). Eles podem ser principalmente instrutivos ou educacionais, ou divertidos, como é o caso em situações de comédia e game shows. Um programa de drama geralmente apresenta um conjunto de atores interpretando personagens em um cenário histórico ou contemporâneo. O programa segue suas vidas e aventuras. Antes da década de 1980, os programas (exceto os seriados do tipo novela) geralmente ficavam estáticos sem arcos da história, e os personagens e premissas principais mudavam pouco. [Citação necessário] desfeito até o final. Por esse motivo, os episódios poderiam ser transmitidos em qualquer ordem. [Citação necessário] Desde os anos 80, muitos filmes apresentam mudanças progressivas no enredo, nos personagens ou em ambos. Por exemplo, Hill Street Blues e St. Elsewhere foram dois dos primeiros filmes de drama norte-americanos da televisão a ter esse tipo de estrutura dramática, Em 2012, foi relatado que a televisão estava se tornando um componente maior das receitas das principais empresas de mídia do que o filme. [5] Alguns também observaram o aumento da qualidade de alguns programas de televisão. Em 2012, o diretor de cinema vencedor do Oscar Steven Soderbergh, comentando sobre ambiguidade e complexidade de caráter e narrativa, declarou: “” Acho que essas qualidades estão agora sendo vistas na televisão e que as pessoas que querem ver histórias com esses tipos de qualidades estão assistindo televisão.
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| baixarfilmes2 |
1,922,666 | Persistence Pays Off: React Components with Local Storage Sync 🔄🦸🏻♂️ | Have you ever spent minutes creating the perfect response only to lose it all with a misclick or... | 0 | 2024-07-13T22:21:57 | https://dev.to/mattlewandowski93/persistence-pays-off-react-components-with-local-storage-sync-2bfk | react, webdev, javascript, beginners | Have you ever spent minutes creating the perfect response only to lose it all with a misclick or accidental refresh? We often focus on optimizing performance and creating good-looking user interfaces, but what about the user experience? Experiences like this often make us want to rage quit. Before auto-save became popular in many applications, this used to happen far too often.
Does anyone remember manually saving your Word documents every few minutes so you didn't lose hours of writing? We've come a long way since then. But what about your web apps? Preserving user input and maintaining state across sessions can be extremely important for some experiences.
## Local Storage in React
### What is Local Storage?
[Local Storage](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage) is a powerful web API that allows your web app to store key-value pairs in a web browser with no expiration date. This client-side storage mechanism offers several advantages for web applications:
1. **Persistence**: Data remains available even after the browser window is closed, enabling seamless user experiences across sessions.
2. **Capacity**: Local Storage typically provides 5-10 MB of data storage per domain, surpassing the limitations of cookies.
3. **Simplicity**: With a straightforward API, Local Storage is easy to implement and use, requiring minimal setup.
4. **Performance**: Accessing Local Storage is faster than making server requests, reducing latency for frequently accessed data.
5. **Offline** Functionality: Applications can leverage Local Storage to provide limited functionality even when users are offline.
### Why Sync Component State with Local Storage?
Syncing React component state with Local Storage offers a powerful solution to common web application challenges. This approach bridges the gap between in-memory state and persistent client-side storage, creating several key benefits:
1. **State Persistence Across Sessions**:
By storing component state in Local Storage, your web app will maintain user progress even after browser refreshes or closes. This persistence enhances the user experience, particularly for forms or multi-step processes where it can almost be expected.
2. **Backup for Unsaved Changes**:
Implementing a Local Storage sync acts as a backup for accidental data loss, automatically preserving user input as they interact with your web app. This means your state will persist between component unmount -> mounts and the app refreshing.
## Implementing Local Storage Sync: A Simple Hook
Let's take a look at a really simple practical example using a custom hook called useLocalStorageState():
```tsx
import { useState, useEffect } from 'react';
const useLocalStorageState = <T,>(
key: string,
defaultValue: T
): [T, React.Dispatch<React.SetStateAction<T>>] => {
const [state, setState] = useState<T>(() => {
const storedValue = localStorage.getItem(key);
return storedValue !== null ? JSON.parse(storedValue) : defaultValue;
});
useEffect(() => {
localStorage.setItem(key, JSON.stringify(state));
}, [key, state]);
return [state, setState];
};
// Example usage
const TextEditor: React.FC = () => {
const [text, setText] = useLocalStorageState<string>('editorText', '');
return (
<textarea
value={text}
onChange={(e) => setText(e.target.value)}
placeholder="Start typing..."
/>
);
};
```
This hook allows us to easily sync any component state with local storage. Keep in mind this is a really simple example, it will always use the localStorage value first if it exists.
## Real-World Examples
### Kollabe: Preserving User Input in Agile Retrospectives
I was running a sprint retrospective with my team recently on my web app [Kollabe](https://kollabe.com/retrospectives). We were running an icebreaker where we all had to draw our favorite planets. Some team members accidentally lost their beautiful masterpieces after clicking away from the input, instead of clicking submit. This was a horrible user experience, and adding a simple local storage sync easily fixed it.
### Other Platforms: Claude and ChatGPT
But it's not just me! Other platforms that you are most likely familiar with are also doing this. Imagine creating a really long prompt on ChatGPT or Claude and it disappearing. You might also rage quit and choose to use their competitor from now on.
## When to Use Local Storage Sync (and When Not To)
- Ideal for preserving user input that requires significant effort
- Not necessary for every piece of state in your application
- Consider the trade-offs between convenience and performance
- Do not store sensitive information. Local storage is not encrypted and has no expiration. It can easily be accessed by anyone with physical access to the same device.
## Performance Considerations
### Performance Considerations: Balancing Persistence and Speed
While syncing component state with Local Storage offers numerous benefits, it's crucial to consider the potential performance implications. Understanding these impacts and implementing mitigation strategies ensures an optimal balance between persistence and speed.
### Potential Performance Impacts
1. **Increased Read/Write Operations:**
Frequent synchronization with Local Storage can lead to a lot of read and write operations, potentially affecting your web apps responsiveness.
2. **Parsing Overhead:**
Local Storage only stores strings, making it necessary to parse and stringify JSON for complex data structures. This process can become computationally expensive for larger objects.
3. **Storage Limitations:**
Browsers typically limit Local Storage to 5-10 MB per domain. Exceeding this limit can result in errors and data loss.
To help improve performance, you might consider debouncing your saves to local storage. This is particularly important for inputs.
```tsx
import { useState, useEffect, useCallback } from 'react';
import debounce from 'lodash/debounce';
const useLocalStorageState = <T,>(key: string, defaultValue: T, delay = 300) => {
const [state, setState] = useState<T>(() => {
const storedValue = localStorage.getItem(key);
return storedValue !== null ? JSON.parse(storedValue) : defaultValue;
});
const debouncedSync = useCallback(
debounce((value: T) => {
localStorage.setItem(key, JSON.stringify(value));
}, delay),
[key, delay]
);
useEffect(() => {
debouncedSync(state);
}, [state, debouncedSync]);
return [state, setState] as const;
};
```
## Future Improvements
There is a lot you can do to improve this hook, but it really depends on how simple or advanced your needs are. Here are a few examples:
1. Implementing a cache object with metadata like created_at or accessed_at. Might be worth just using another library at this point though.
2. Clearing expired cache objects on startup to prevent dead objects from consuming a lot of space over time.
3. Allow to storing objects and strings
4. Allow for prioritizing a default value, over the local storage value. This could be useful if your input is also being used as an `editMode` for an existing value.
## That's it!
Syncing React component state with Local Storage is a useful technique that can really enhance the user experience of your web applications. I'd recommend doing an audit of your application to see if you can also benefit from it!
Also, shameless plug 🔌. If you work in an agile dev team and use tools for your online meetings like planning poker or retrospectives, check out my free tool called [Kollabe](https://kollabe.com/)! | mattlewandowski93 |
1,922,667 | Enhanced Web Application Security with Azure Network Security Groups and Application Security Groups (Part 2) | Introduction: In part 1, we explored isolating resources within a virtual network for enhanced... | 0 | 2024-07-17T21:58:03 | https://dev.to/jimiog/enhanced-web-application-security-with-azure-network-security-groups-and-application-security-groups-part-2-2po8 | azure, cloud, network, security | **Introduction:**
In [part 1](https://dev.to/jimiog/isolate-and-connect-your-applications-with-azure-virtual-networks-and-subnets-part-1-3k70), we explored isolating resources within a virtual network for enhanced security. This part delves into Azure Network Security Groups (NSGs) and Application Security Groups (ASGs) to further control network traffic to your web application.
**Prerequisites:**
* An Azure account with an active subscription
* A virtual network created in Azure (refer to part 1 for guidance)
* Basic understanding of Azure Resource Manager templates (ARM templates)
**Understanding Network Security Groups and Application Security Groups:**
* **NSGs:** These act as firewalls, filtering inbound and outbound traffic to specific resources or subnets within your virtual network.
* **ASGs:** These group VMs with similar security needs, allowing you to define security policies at the application level rather than managing individual VMs.
**Creating an Application Security Group:**
1. **Search:** In the Azure portal, search for "Application Security Group" and click "Create."
2. **Configuration:**
* Select your existing resource group.
* Provide a descriptive name for the ASG (e.g., "web-app-asg").
* Choose the same region as your virtual network (The images shows Canada Central but use US East).
3. **Review and Create:** Click "Review + create" to validate and deploy the ASG.
**Creating and Associating a Network Security Group:**
1. **Search:** In the Azure portal, search for "Network Security Group" and click "Create."
2. **Configuration:**
* Select your existing resource group.
* Provide a name for the NSG (e.g., "web-app-nsg").
* Choose the same region as your virtual network.
3. **Review and Create:** Click "Review + create" to deploy the NSG.
4. **Association:**
* Search for "Network Security Group" again and navigate to your newly created NSG.
* In the "Settings" menu, select "Subnets."
* Click "+ Associate" and choose the virtual network subnet containing your web server (e.g., "backend").
* Click "OK" to confirm the association.
**Creating Network Security Group Rules:**
1. **Inbound Security Rules:**
* Navigate to your NSG's "Settings" and select "Inbound security rules."
* Click "+ Add" to create a new rule.
2. **Rule Configuration:**
* Leave "Source" as "Any" to allow traffic from anywhere.
* Change "Destination" to "Application Security Group."
* Select the ASG you created earlier (e.g., "web-app-asg").
* Choose the service/port combination for your application traffic (e.g., "SSH" for port 22).
* Leave "Priority" as 100.
* Click "Add" to create the rule.
## Deploying VMs with an ARM Template (Optional)
This section walks you through deploying the VMs needed for this tutorial using a remote ARM template hosted on GitHub. ARM templates provide a declarative way to define your infrastructure resources and their configurations. If you're unfamiliar with ARM templates, you can skip this section and proceed with the assumption that you already have two VMs created within your virtual network.
**1. Open Azure Cloud Shell:**
* In the Azure portal, locate the **Cloud Shell** button (usually on the top menu bar) and click it. Choose **PowerShell** or **Bash** based on your preference.
**2. Deploying VMs with Remote Template:**
* Paste the following PowerShell code snippet into your Cloud Shell window, replacing `[your resource group name]` with the actual name of your resource group:
```powershell
$RGName = "[your resource group name]"
$TemplateUri = "https://raw.githubusercontent.com/MicrosoftLearning/Configure-secure-access-to-workloads-with-Azure-virtual-networking-services/main/Instructions/Labs/azuredeploy.json"
New-AzResourceGroupDeployment -ResourceGroupName $RGName -TemplateUri $TemplateUri
```
* Press Enter to execute the code. This will deploy the VMs defined within the template.
**Benefits of ARM Templates:**
* **Repeatability:** Define your infrastructure configuration once and deploy it multiple times consistently.
* **Version Control:** Track changes to your infrastructure over time using version control systems like Git.
* **Error Reduction:** Reduce errors by defining infrastructure as code instead of manual deployments.
**Additional Notes:**
This section provides a high-level overview of ARM template deployment. Consider including a link to Microsoft's documentation on ARM templates for a deeper dive ([https://learn.microsoft.com/en-us/azure/azure-resource-manager/](https://learn.microsoft.com/en-us/azure/azure-resource-manager/)).
## Adding the Application Security Group to VM2
Now that you have your VMs deployed (either manually or through the ARM template), we can proceed with configuring the security groups.
1. **Navigate:** Locate your virtual network resource group and select VM2.
2. **Networking Tab:** Go to the "Networking" tab of VM2.
3. **Application Security Groups:** Under "Application security groups," click "+ Add application security group."
4. **Selection:** Choose the ASG you created earlier (e.g., "web-app-asg").
5. **Confirmation:** Click "Add" to associate the ASG with VM2.
**Conclusion**
By implementing ASGs and NSGs, you've significantly enhanced the security of your web application by controlling inbound traffic and grouping VMs with similar security requirements. Remember to adjust security rule settings based on your specific application needs. | jimiog |
1,922,669 | Day 1: Defining Variables in JavaScript | I’ve started Hitesh Sir’s JavaScript 30 days challenge, and today’s task was all about defining... | 28,057 | 2024-07-13T22:01:51 | https://dev.to/tejas_khanolkar_473f3ed1a/day-1-defining-variables-in-javascript-4719 |
>
I’ve started Hitesh Sir’s JavaScript 30 days challenge, and today’s task was all about defining variables and understanding their types. If you haven't joined yet, you can check it out [here](https://courses.chaicode.com/learn/batch/30-days-of-Javascript-challenge). Hurry, it's free until July 14th!
>
## Declaring Variables
In JavaScript, you can declare variables using three keywords: let, var, and const. Here’s a quick overview:
let: Allows you to declare a variable that can be changed later.
var: Similar to let, but has some differences in scope handling.
const: Used to declare variables that should not be changed.
Example:
```
let myVariable = 'Hello';
var myOldVariable = 'World';
const myConstant = 42;
```
When you use let or var, you can change the value of the variable. However, if you declare a variable with const, attempting to change its value will result in an error.
## Variable Types
You can assign various types of values to variables:
**Number**: For numerical values.
**String**: For text values.
**Boolean**: For true/false values.
**undefined**: For variables that are declared but not yet assigned a value.
**null**: For variables explicitly set to have no value.
These are called primitive values.
**Syntax**
The syntax for declaring a variable is straightforward:
`let/const/var variableName = value;`
Think of a variable as a box, and the value as the content inside the box.
##Key Points
**typeof**: This is an operator, not a function. It’s used to check the type of a variable.
```
console.log(typeof myVariable); // Output: string
```
**console.table**: Handy for displaying arrays and objects in a tabular format.
```
const fruits = ['Apple', 'Banana', 'Cherry'];
console.table(fruits);
const user = {
name: 'John',
age: 25,
city: 'New York'
};
console.table(user);
```
## Research Findings on Variable Declarations
**I found an excellent resource on variable declarations at [javascriptInfo]( https://JavaScript.info ). Here’s a summary of what I learned:**
- **Difference between var and let:** They are almost the same, but their scope handling is different. let is block-scoped while var is function-scoped.
- **Naming constants:** Use uppercase letters for constant variable names if their values are already known. Otherwise, use camelCase.
- **Redeclaration:** You cannot declare the same variable again using let or var, but you can change its value multiple times (except for const variables).
- **Naming conventions:** Variable names should preferably be in camelCase (though it's not strictly required).
- **Declaring multiple variables:** It's better to declare multiple variables on separate lines for readability.
```
let user = 'John';
let age = 25;
let message = 'Hello';
```
Instead of:
```
let user = 'John', age = 25, message = 'Hello';
```
- **Meaningful names:** Always give meaningful names to your variables.
For more detailed information, you can follow [this](https://JavaScript.info/variables)blog article.
Feel free to tweak this further as per your style. Happy coding! | tejas_khanolkar_473f3ed1a | |
1,922,670 | A fancy pdf CV with Asciidoctor | In this post I’ll show you how to create a CV in PDF using a simple text file. No Word, no Google... | 0 | 2024-07-13T22:13:36 | https://jorge.aguilera.soy/blog/2024/cv-asciidoctor.html | asciidoctor, docascode | ---
title: A fancy pdf CV with Asciidoctor
published: true
date: 2024-07-13 00:00:00 UTC
tags: asciidoctor,docascode
canonical_url: https://jorge.aguilera.soy/blog/2024/cv-asciidoctor.html
---
In this post I’ll show you how to create a CV in PDF using a simple text file. No Word, no Google Docs, no Acrobat … only text
## asciidoctor-web-pdf
Install `asciidoctor-web-pdf`
`npm i -g @asciidoctor/core asciidoctor-pdf`
## assets
in a folder, grab these files:
- [https://github.com/ggrossetie/asciidoctor-web-pdf/blob/main/examples/resume/style.css](https://github.com/ggrossetie/asciidoctor-web-pdf/blob/main/examples/resume/style.css)
- [https://github.com/ggrossetie/asciidoctor-web-pdf/blob/main/examples/resume/template.js](https://github.com/ggrossetie/asciidoctor-web-pdf/blob/main/examples/resume/template.js)
- [https://github.com/ggrossetie/asciidoctor-web-pdf/blob/main/examples/resume/phone.svg](https://github.com/ggrossetie/asciidoctor-web-pdf/blob/main/examples/resume/phone.svg)
- [https://github.com/ggrossetie/asciidoctor-web-pdf/blob/main/examples/resume/mail.svg](https://github.com/ggrossetie/asciidoctor-web-pdf/blob/main/examples/resume/mail.svg)
## CV
in the same folder, create a text file, JorgeAguileraCV.adoc, for example, and write: (feel free to change with your data)
### Header
```
= Software Developer Solutions
Jorge Aguilera González
[.info]
== !
=== Jorge Aguilera
[contact]
- image:mail.svg[role="picto"] jorge@edn.es
```
The First line is the title of your CV
The Second line will not be visible, so you can omit but be sure to let a blank line
`[.info]` creates a section where you’ll insert your name
`[contact]` will be used to write your email
You can add another item with your phone, for example:
```
- image:mail.svg[role="picto"] jorge@edn.es
- image:phone.svg[role="picto"] +3491xxxxxx
```
## Left
We’ll use the left bar of our CV to include some tips about us, as knowledge, education, style of life …
So append to the file following text:
```
==== Knowledge
- 30+ years as Developer
- C, C++, *Java*, Groovy
- *Javascript*, TypeScript, NodeJS
- Maven, Gradle
- Asciidoctor
==== OpenSource Projects
- K8s Caos Operator
- Gradle extensions
- Google DSL (Groovy)
- Asciidoctor Extensions
- MicronautRaffle
==== Publications
101-groovy-scripts blog
```
## About me
Now it’s time to write some sentences about us:
```
[.chronologie]
== !
=== About me
With more than 30 years of experience in IT, I’ve worked in many different sectors where always I
focused to bring quality and innovation ideas in every project I’ve been participated. During several
years I’ve run a one-person company offering services as technical leader and providing my
experience to improve the skills of the team, teaching good practices and applying productive tools
and languages.
```
`[.chronologie]` will position "the cursor" at the top of the right part and we’ll start writing an "about me" sentences
## Professional career
```
==== Professional experience
*Software Architect* at EDN (2024)
- Helping different customers in the digital transformation of their systems, migrating from monolithic application
to microservice architecture, implement best practices as code review and clean code
*Software Architect/DevOps* at Baraka (Dec 2022)
- Leading the migration of a NodeJS *Javascript* application deployed in AWS ECS to a *microservice architecture* in Kubernetes.
```
## Building our CV
It’s time to see how it looks:
`asciidoctor-web-pdf JorgeAguilera.adoc --template-require ./template.js`
<dl>
<dt>INFO</dt>
<dd>
<p>This command will generate a temp HTML file</p>
</dd>
</dl>
Surely you’ll need to iterate several times. My advice is to be conscious and write only a couple of sentences in every position, so the CV will have only one page
This is how mine looks
[JorgeAguilera.pdf](https://jorge.aguilera.soy/blog/2024/JorgeAguilera.pdf)
Now is the time to send it and wait the headhunter’s call. Good luck | jagedn |
1,922,671 | The Quantification of Perception | The faculties of perception have historically been classified as five senses. I'll content this is a... | 0 | 2024-07-13T22:19:36 | https://dev.to/theholyspirit/the-quantification-of-perception-3iff | datascience, learn, humansoftware, mixedreality | The faculties of perception have historically been classified as five senses. I'll content this is a limitation of the more full scope of perception, nevertheless, five senses are more than enough to begin an exercise of quantifying perception.
A Generative Engine produces quanta of Perception. For each of the given perceptions, there is a generative engine.
**Generative Engines**
Sound Generative Engine
Taste Generative Engine
Sight Generative Engine
Touch Generative Engine
Smell Generative Engine
At Runtime, the generative engines run simultaneously, and are often referred to collectively as "generative engine."
**The Context Of Runtime**
Generative Engine
Screen
B*** Box
B*** Bag
**Quanta Of Perception**
A Quanta is a collection of significant figures which describe a pixel of a rendered Scene. One attribute on a quantum is reference to its generative engine. `sense: sound|smell|touch|taste|sight`
For quantification purposes, it will be said that a perceptual quanta can have one of four states. The use of four quantum positions is a contentiously arbitrary constraint for the explicit purpose of determining the attributes of a quantification system. `state: M|E|W|3`
The system of perception will be said to occur with reference to a Time Series of Scenes. As such each quantum can specify the time address at which it should be rendered. The specification here is scene as there are many scenes at a given time, yet only one time per scene. Therefore, specifying **scene** qualifies as a time address. `scene: 1234`
Sense-specific references are expected, and the data model of a perceptual quantum can be extended. `sensual: []`
**Snapshot**
Given the model above, an instantaneous snapshot of perception as produced by Generative Engine and prior to Screen representation could be as given here:
```
sense: sound
state: M
scene: 1
sensual: []
sense: smell
state: M
scene: 1
sensual: []
sense: touch
state: M
scene: 1
sensual: []
sense: taste
state: M
scene: 1
sensual: []
sense: sight
state: M
scene: 1
sensual: []
sense: sound
state: E
scene: 1234
sensual: [x:0,y:0,z:0]
sense: sound
state: W
scene: 1234
sensual: [x:1,y:1,z:1]
```
While a readable representation is shown here, the data is flatmapped for transport at Runtime. | theholyspirit |
1,922,690 | The Features of the Updates on ES14 (ECMAScript 2023) | What is the ECMAScript? The ECMAScript is the official name for javascript as a language... | 0 | 2024-07-13T22:25:46 | https://dev.to/paulude/the-features-of-the-updates-on-es14-ecmascript-2023-359j | webdev, javascript, programming, tutorial | ## What is the ECMAScript?
The ECMAScript is the official name for javascript as a language standard. It is updated by ECMA regularly and also implemented by the organization as soon as new features have been added and tested to the previous feature. A new version has been released annually since 2015 by the organisation.
Now that the ECMAScript has been explained we get to know about the ES14
### The ES14 (ECMAScript 2023)
The ECMAScript 2023 as the name implies is the fourteenth standard of the ECMAScript and was released in the year 2023. It introduced only two main features which were aimed to improve the readability and the mathematical operations of code and were also aimed at evolving javascript even in the slightest of ways
It's important to note that ES14 was a relatively small update compared to its predecessor ES13 (ES2023) and subsequent versions. However, the features it introduced were still significant for developers. The primary goal of the evolution of the ECMAScript is to bring about a significant change in the javascript language, it is also to introduce features that would encourage the more efficient and expressive use of the javascript language in the development environment. The ECMAScript developer community has always charged themselves with improving the javascript world over the years.
ECMAScript's history is quite interesting. It started in 1997 and has seen regular updates since 2015, as a result of the annual change, this approach allows for smaller, more manageable updates to the language rather than large, infrequent overhauls.
## Features of the ES14
Below are elaborate explanations of some of the features that the ES14 provides us with. In this section, I will also be providing a visual representation of each feature.
I. **The array** `findLastIndex`: This function is used to get or search an array from the end to the beginning. It is used in case scenarios where the last array is needed and it also returns the index of the last element that satisfies the provided testing function. Below is a visual example of the `findLastIndex` used to get an array.
II. **The Hashbang grammar**: This allows the shebang comments at the beginning of the javascript code, the syntax for the shebang/hashbang grammar is `#!/usr/bin/env node`. The shebang grammar is a line of code that cannot be executed code written at the beginning of the javascript code and javascript ignores this line of code when parsing the code. Below is a visual representation of the shebang grammar.
III. **Update on the WeakMap Keys**: The use of objects as a WeakMap Key was introduced, previously, only subjects were used as a WeakMap Key but with the introduction of the ES14, the use of objects was introduced, thereby enhancing the use of WeakMaps. Below is a visual representation of the WeakMap Key.
IV. **Change of Array By Copy**: The introduction of methods like `toReversed()`, `toSorted()`, `toSpliced()` and `with()`, helps to perform a non-destructive operation on arrays. Below is a visual representation of this new feature.
V. **WeakRef and FinalizationRegistry objects**: These allow the creation of weak references to objects and allow the user to request a call-back when an object is garbage-collected. The purpose of this is to improve memory management and build a more efficient data structure. Below is a visual representation of this feature.
VI. **The introduction of** `Atomics.waitAsync`: This is used to support non-blocking synchronization in memory situations and it is also useful in multi-threaded javascript environments. It is the asynchronous version of Atomics.wait. Below is the visual representation of this feature.
VII. **The introduction of** `RegExp /v flag`: This is used to enable more Unicode-aware pattern matching. It became the new flag for expressions and allows for better handling of case folding and other Unicode properties in regular expressions. It also allows adding comments within the regex for better documentation.
VIII. **Ergonomic brand checks**: This is used to simplify the process of checking private fields in objects, it makes it more inherent to know if an object has a specific private field. It also makes use of the `in` operator with a private field name. Below is a visual example of the brand check feature.
These features stated above enhance the Javascript capacity and make it more flexible and powerful for developers.
## Uses of the ES14 features
These features find applications in various scenarios:
1. The features can be used in developing complex software that entails maintaining private fields for data security and integrity.
2. They can also be used in data validation, and search algorithms where precise pattern matching is required.
3. They can be used in scripting and automation tasks where asynchronous tasks or operations are common, thereby improving code clarity.
4. They can be used in scheduling operations and financial systems.
5. They can be used in creating applications that require efficient memory management.
## Advantages of ES14 Features
The advantages of the ES14 include;
1. Increased memory management with WeakRef and FinalizationRegistry.
2. It allows simpler checks for private fields in class.
3. It allows a simpler creation of executable Javascript files.
4. It helps with a better approach to array handling with non-destructive files.
5. It introduced advanced Unicode support in regular expressions.
## Disadvantages of the ES14 features
The disadvantages of the ES14 include;
1. Features when misused or overused can make the code less readable.
2. The introduction of some complex features might be too much for much simpler tasks.
3. It introduces compatibility issues with old browsers and environments.
4. The need to update new development tools to support new syntax.
5. Developers would need to earn new syntax and API which would take more time and input.
## Comparing the ES13 and the ES14 features
1. The ES13 focused more on class-related features and error handling while the ES14 focused more on array manipulation and non-destructive features.
2. The ES13 introduced top-level await for asynchronous systems, while the ES14 improved memory management for WeakRef and FinalizationRegistry.
3. The ES13 update was mainly focused on object-oriented programming, while the ES14 focused more on developing array operations and Unicode support.
## Conclusion
### Summary
In conclusion, ES14 brings a host of new features and enhancements that significantly improve the JavaScript language. Key updates made in the ES14 enhanced code readability, maintainability, and security, and provided a robust solution for date and time handling, addressing previous limitations. Also, the simplification of asynchronous programming, makes it more intuitive and efficient. Logical assignment operators and improved memory management features like WeakRefs and FinalizationRegistry further streamline coding practices and optimize performance. These updates reflect the ongoing evolution of ECMAScript, ensuring JavaScript remains a powerful and versatile tool for modern web development.
### Closing Remarks
The world is evolving daily and also the tech space keeps evolving, it is advisable that developers familiarize themselves with these features to leverage their full potential in building more effective and maintainable applications, and always being abreast of whatever new feature is introduced in the Javascript world so as to stay relevant and more productive.
Thank you for reading, I hope it was helpful.
| paulude |
1,922,691 | Building a Scalable and Reliable Rental Property Website on AWS | Building a rental property website that’s both reliable and scalable, all while keeping costs down?... | 0 | 2024-07-13T22:26:08 | https://dev.to/oloko0201/building-a-scalable-and-reliable-rental-property-website-on-aws-5269 | Building a rental property website that’s both reliable and scalable, all while keeping costs down? AWS offers a suite of services that can help you build a robust application within your budget. In this project, I will walk you through the steps to set up your rental property website using AWS.
### Step 1: Setup S3 and CloudFront
First, we’ll host our website’s static content on Amazon S3 and use CloudFront for fast and secure content delivery.
Create an S3 Bucket for Static Website Hosting
Go to the S3 Console: S3 Console.
Create a Bucket:
Click “Create bucket.”
Enter a bucket name, like rental-property-website, and choose a
region.
Click “Create bucket.”
Enable Static Website Hosting:
Select the bucket you created.
Go to the “Properties” tab.
Enable “Static website hosting.”
Specify the index document (index.html) and error document
(error.html).
Explanation: Amazon S3 (Simple Storage Service) is used for storing static website files such as HTML, CSS, and JavaScript. By enabling static website hosting, your S3 bucket will serve your website directly.
Upload Static Website Content to S3
Go to the “Objects” Tab in your S3 bucket.
Upload Your Website Files:
Click “Upload” and add your HTML, CSS, and JavaScript files.
Explanation: Upload your static website content to the S3 bucket so it can be served to users.
Create a CloudFront Distribution
Go to the CloudFront Console: CloudFront Console.
Create a Distribution:
Click “Create Distribution.”
Select “Web” for the delivery method.
For the origin domain, select your S3 bucket.
Configure other settings as needed (e.g., default root object to
index.html).
Click “Create Distribution.”
Explanation: Amazon CloudFront is a Content Delivery Network (CDN) that caches your static files at edge locations around the world, reducing latency and improving load times for your users.
### Step 2: Deploy Lambda Functions and API Gateway
Next, we’ll set up our backend logic using AWS Lambda and expose it through API Gateway.
Create Lambda Functions
Go to the Lambda Console: Lambda Console.
Create a New Function:
Click “Create function.”
Select “Author from scratch.”
Give your function a name, such as rentalPropertyFunction, and
choose a runtime (e.g., Node.js, Python).
Click “Create function.”
Write the Function Code:
Implement your backend logic (CRUD operations for properties,
user management, bookings).
Click “Deploy.”
Explanation: AWS Lambda lets you run code without provisioning or managing servers. You can use Lambda functions to handle backend operations for your website.
Create an API Gateway
Go to the API Gateway Console: API Gateway Console.
Create an API:
Click “Create API” and select “HTTP API.”
Click “Build.”
Define API Settings:
Add routes for your API (e.g., /properties, /users, /bookings).
Integrate each route with the corresponding Lambda function.
Deploy the API and note the endpoint URL.
Explanation: Amazon API Gateway is a fully managed service that makes it easy to create, publish, maintain, monitor, and secure APIs. It serves as a "front door" for applications to access data, business logic, or functionality from your backend services.
### Step 3: Configure the Database
Now, let’s set up a database to store your property listings, user data, and bookings.
Launch an RDS Instance
Go to the RDS Console: RDS Console.
Create a Database:
Click “Create database.”
Select “Standard create” and choose the database engine (e.g.,
MySQL, PostgreSQL).
Configure instance details and select a cost-effective instance
type (e.g., db.t3.micro).
Enable Multi-AZ for high availability.
Configure database settings (e.g., DB instance identifier, master
username, and password).
Click “Create database.”
Explanation: Amazon RDS (Relational Database Service) is a managed relational database service that provides easy setup, operation, and scaling of a relational database in the cloud. It handles routine database tasks such as backups, patching, and scaling.
Create a DynamoDB Table
Go to the DynamoDB Console: DynamoDB Console.
Create a Table:
Click “Create table.”
Enter a table name (e.g., RentalProperties).
Define the primary key (e.g., PropertyID).
Configure other settings as needed.
Click “Create table.”
Explanation: Amazon DynamoDB is a fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale. It is a fully managed database and supports both document and key-value store models.
### Step 4: Setup Cognito for Authentication
To manage user authentication, we’ll set up Amazon Cognito.
Create a Cognito User Pool
Go to the Cognito Console: Cognito Console.
Create a User Pool:
Click “Manage User Pools” and then “Create a user pool.”
Enter a pool name, such as rentalPropertyUserPool.
Configure sign-in options (e.g., email, username).
Configure user attributes and policies.
Click “Create pool.”
Explanation: Amazon Cognito provides authentication, authorization, and user management for your web and mobile apps. Your users can sign in directly with a username and password or through third parties like Facebook, Amazon, or Google.
Setup Cognito User Pool Integration
Integrate Cognito in Your Lambda Functions:
Use AWS SDK to authenticate and manage users.
Explanation: Integrating Cognito with your Lambda functions allows you to handle user authentication and management securely and efficiently.
### Step 5: Configure Route 53
We’ll use Route 53 for domain management and DNS routing.
Register a Domain or Use an Existing One
Go to the Route 53 Console: Route 53 Console.
Register a Domain:
Click “Registered domains” and then “Register Domain” to purchase
a new domain.
Follow the prompts to register the domain.
Explanation: Amazon Route 53 is a scalable and highly available Domain Name System (DNS) web service designed to route end users to Internet applications.
Create DNS Records
Set Up DNS Records:
Go to the “Hosted zones” in Route 53 and select your domain.
Create an A record pointing to your CloudFront distribution.
Explanation: DNS records are used to direct traffic to your CloudFront distribution, ensuring that your website is accessible via your custom domain.
### Step 6: Implement Monitoring and Logging
Finally, we’ll set up CloudWatch to monitor our application and log critical metrics.
Enable CloudWatch for Monitoring
Go to the CloudWatch Console: CloudWatch Console.
Configure CloudWatch Logs:
Set up logging for your Lambda functions.
Set Up CloudWatch Alarms:
Create alarms for critical metrics (e.g., Lambda errors, RDS CPU utilization).
Explanation: Amazon CloudWatch is a monitoring and observability service built for DevOps engineers, developers, site reliability engineers (SREs), and IT managers. CloudWatch provides data and actionable insights to monitor your applications, respond to system-wide performance changes, optimize resource utilization, and get a unified view of operational health.
### Final Steps
Test Your Website: Ensure all parts (static content, API, database, authentication) are working as expected.
Optimize Costs: Regularly review your AWS usage and cost reports to identify potential savings.
By following these steps, you can create a robust rental property website using AWS services, ensuring scalability, reliability, and cost-efficiency. Happy building!
| oloko0201 | |
1,922,694 | ASSISTIR Divertida-Mente 2 (2024) HD F I L M E COMPLETO DUBLADO ONLINE | ASSISTIR ▷ Divertida Mente 2 (2024) HD F I L M E COMPLETO DUBLADO ONLINE 🔴➡ ASSISTIR AGORA 👇👉... | 0 | 2024-07-13T22:31:12 | https://dev.to/baixarfilmes2/assistir-divertida-mente-2-2024-hd-f-i-l-m-e-completo-dublado-online-49oh | webdev, discuss, github, web | ASSISTIR ▷ Divertida Mente 2 (2024) HD F I L M E COMPLETO DUBLADO ONLINE
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Inside Out 2 (Divertida Mente 2) é um filme de ação e ficção científica dirigido por Wes Ball a partir de um roteiro de Friedman, Rick Jaffa e Amanda Silver e Patrick Aison, e produzido por Joe Hartwick Jr., Jaffa, Silver e Jason Reed. Produzido e distribuído pela 20th Century Studios, pretende ser a sequência de War for the Planet of the Apes (2017) e o quarto filme do reboot da franquia Planet of the Apes. É estrelado por Teague no papel principal ao lado de Freya Allan, Peter Macon, Eka Darville e Kevin Durand.
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Os jogadores que desempenham papéis em filmes são chamados de atores (homens) ou atrizes (mulheres). Existe também o termo “extra”, que é usado como um papel secundário no filme com poucos personagens. Isso é diferente do papel principal, que está se tornando cada vez mais importante. Como ator, deve-se ter o talento de atuação correspondente ao tema do filme em que desempenha o papel principal. Em algumas cenas, o papel do ator pode ser substituído por um dublê ou dublê. A presença de atores substitutos é importante para substituir atores que interpretam cenas difíceis e extremas, normalmente comuns em filmes de ação.
Os filmes também podem ser usados para transmitir certas informações sobre o produtor do filme. Algumas indústrias também usam filmes para transmitir e representar seus símbolos e cultura. A produção de filmes também é uma forma de expressão visual, pensamentos, ideias, conceitos, sentimentos e emoções em filmes. Os filmes em si são em sua maioria fictícios, embora alguns sejam baseados em histórias reais ou histórias reais.
Existem também documentários com imagens originais e reais ou filmes biográficos que contam a história de uma personagem. Existem muitos outros tipos populares de filmes, incluindo filmes de ação, filmes de terror, comédias, filmes românticos, filmes de fantasia, thrillers, filmes de drama, filmes de ficção científica, filmes policiais, documentários, etc.
Estas são algumas informações sobre filmes ou a definição de filmes. Essas informações foram citadas de várias fontes e referências. Espero que seja util.
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Seu primeiro programa de TV foi experimental, esporádico e, desde a década de 1930, só pode ser assistido bem perto do mastro. Programas de TV, como os Jogos Olímpicos de Verão de 1936 na Alemanha, onde o rei George VI foi coroado. No Reino Unido em 19340 e com o lançamento do famoso David Sarnoff na Feira Mundial de Nova York em 1939, esse meio continuou a se desenvolver, mas a Segunda Guerra Mundial paralisou seu desenvolvimento após a guerra. O filme mundial de 19440 inspirou muitos americanos, e eles compraram a primeira televisão. Em 1948, a popular estação de rádio Texaco Theatre tornou-se o primeiro programa de variedades semanal da TV. O programa apresentava Milton Berle e recebeu o título de “Mr. TV”, provando que Este tipo de mídia é estável e pode atrair anunciantes em formas modernas de entretenimento . Em 4 de setembro de 1951, a primeira transmissão nacional de televisão ao vivo nos Estados Unidos, quando o presidente Harry Truman (Harry Truman) fez um discurso sobre o cabo transcontinental da AT&T e o sistema de retransmissão de microondas no Tratado de Paz do Japão em São Francisco, ele já havia falado com o mercado local Empresa de radiodifusão. sim
❍❍❍ Formatos e gêneros ❍❍❍
Veja também: Lista de gêneros § Formatos e gêneros de cinema e televisão. Os programas de televisão são mais variados do que a maioria das outras formas de mídia, devido à grande variedade de formatos e gêneros que podem ser apresentados. Um programa pode ser fictício (como em comédias e dramas) ou não fictício (como em documentários, notícias e reality shows). Pode ser tópico (como no caso de um noticiário local e alguns filmes feitos para a televisão) ou histórico (como no caso de muitos documentários e FILMES fictícios). Eles podem ser principalmente instrutivos ou educacionais, ou divertidos, como é o caso em situações de comédia e game shows. Um programa de drama geralmente apresenta um conjunto de atores interpretando personagens em um cenário histórico ou contemporâneo. O programa segue suas vidas e aventuras. Antes da década de 1980, os programas (exceto os seriados do tipo novela) geralmente ficavam estáticos sem arcos da história, e os personagens e premissas principais mudavam pouco. [Citação necessário] desfeito até o final. Por esse motivo, os episódios poderiam ser transmitidos em qualquer ordem. [Citação necessário] Desde os anos 80, muitos filmes apresentam mudanças progressivas no enredo, nos personagens ou em ambos. Por exemplo, Hill Street Blues e St. Elsewhere foram dois dos primeiros filmes de drama norte-americanos da televisão a ter esse tipo de estrutura dramática, Em 2012, foi relatado que a televisão estava se tornando um componente maior das receitas das principais empresas de mídia do que o filme. [5] Alguns também observaram o aumento da qualidade de alguns programas de televisão. Em 2012, o diretor de cinema vencedor do Oscar Steven Soderbergh, comentando sobre ambiguidade e complexidade de caráter e narrativa, declarou: “” Acho que essas qualidades estão agora sendo vistas na televisão e que as pessoas que querem ver histórias com esses tipos de qualidades estão assistindo televisão.
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1,922,697 | Guía Completa del CMD de Windows: Desde Conceptos Básicos hasta Comandos Avanzados | La consola CMD, también conocida como símbolo del sistema es la ventana interprete de Windows que... | 0 | 2024-07-13T22:35:49 | https://dev.to/miltondiazco/cmd-de-windows-1obn | La consola **CMD**, también conocida como **símbolo del sistema** es la ventana interprete de Windows que permite enviar cualquier tipo de orden al sistema operativo.
La inicia la aplicación de 16 bits `cmd.exe` que se encuentra la ruta `C:\Windows\System32` la cual traduce e interpreta los comandos transmitidos al sistema operativo.
**¿Cómo abrir el símbolo del sistema en Windows?**
Presiona la tecla `[Win]` + `[R]`, después de que se abra la ventana de ejecutar escribe `cmd` y presiona `[Enter]` o en Aceptar.
**¿Cómo abrir el símbolo del sistema como administrador?**
Presiona la tecla `[Win]` + `[R]`, en la ventana de ejecutar escribe `cmd`, después mantén pulsadas las teclas `[Conrol]` + `[Shift]` y presiona `[Enter]` o en Aceptar, tendrás que aceptar la ventana de confirmación para abrir el símbolo del sistema como administrador.
Te invito a explorar los siguientes artículos, donde explico desde los comandos más básicos hasta los más avanzados del `CMD` de Windows. En estos artículos, encontrarás una guía completa que te permitirá mejorar tu productividad y solucionar problemas comunes de manera eficiente.
- [Comandos Básicos](https://dev.to/miltondiazco/comandos-basicos-1h6h)
- [Comandos para Manipular Archivos y Directorios](https://dev.to/miltondiazco/cmd-comandos-para-manipular-archivos-y-directorios-5g0)
- [Comandos de Fecha](https://dev.to/miltondiazco/comandos-de-fecha-306e)
- [Comandos de Red](https://dev.to/miltondiazco/comandos-de-red-560)
- [Comandos Avanzados](https://dev.to/miltondiazco/comandos-avanzados-3a10) | miltondiazco | |
1,922,698 | [Game of Purpose] Day 56 | Today I made Manny's limbs react to bullet hits. My goal is make it react naturally, so if it is hit... | 0 | 2024-07-13T22:40:04 | https://dev.to/humberd/game-of-purpose-day-56-11km | gamedev | Today I made Manny's limbs react to bullet hits.
My goal is make it react naturally, so if it is hit in his right arm also the torse should feel an impact. Right now only the bones below the hit bone react with physics. Don't yet know how to achieve it.
{% embed https://youtu.be/1wXWxwy6atk %} | humberd |
1,922,700 | Comandos para Manipular Archivos y Directorios | DIR ‘DIRECTORY’ Permite listar el contenido de un directorio // Opción 1 dir... | 0 | 2024-07-13T22:44:51 | https://dev.to/miltondiazco/cmd-comandos-para-manipular-archivos-y-directorios-5g0 | cmd, windows | ## `DIR` ‘DIRECTORY’
Permite listar el contenido de un directorio
```bash
// Opción 1
dir Documentos
// Opción 2
dir C:\Usuarios\NombreDeUsuario\Documentos
```
## `CD` ‘CHANGE DIRECTORY’
Sirve para movernos entre directorios
***Selecciona la carpeta que especificamos***
```bash
// Opción 1
cd Documentos
// Opción 2
cd C:\Usuarios\NombreDeUsuario\Documentos
```
***Nos indica en que directorio estamos***
```bash
cd .
```
***Nos lleva al directorio anterior***
```bash
cd ..
```
***Nos lleva a la unidad `C:\`***
```bash
// Opción 1
cd \
// Opción 2
cd /
```
## `MD` ‘MAKE DIRECTORY’
Crea un directorio
```bash
md Documentos
```
## `MKDIR` ‘MAKE DIRECTORY’
Al igual que el comando anterior este también nos permite crear directorios
```bash
mkdir Documentos
```
## `COPY CON`
Permite crear archivos de texto.
```bash
// Opción 1
copy con Archivo.txt
// Opción 2
copy con C:\Usuarios\NombreDeUsuario\Archivo.txt
```
**Nota:** Una vez ejecutado el comando, escribe el contenido que desees en el archivo. Para finalizar, presiona las teclas `[Control]` + `[Z]` y después `[Enter]`.
## `TYPE`
Permite visualizar el contenido de un archivo de texto.
```bash
type Archivo.txt
```
## `DEL` - `ERASE`
Permiten eliminar archivos.
```bash
// Opción 1: eliminar el archivo especificado
del nombre_del_archivo.extension_del_archivo
// Opción 2: eliminar el archivo especificado
erase nombre_del_archivo.extension_del_archivo
// Opción 3: eliminar los archivos del directorio especificado
del nombre_del_directorio
// Opción 4: eliminar los archivos del directorio especificado
erase nombre_del_directorio
```
## `COPY` (COPIAR)
Permite copiar un archivo.
```bash
// Opción 1: copiar un archivo en la carpeta que nos encontremos
copy archivo_que_se_va_a_copiar.extension nombre_del_nuevo_archivo.extension
// Opción 2: copiar el archivo en una carpeta diferente
copy archivo_que_se_va_a_copiar.extension ruta\nombre_del_nuevo_archivo.extension
```
## `MOVE` (MOVER)
Permite mover un archivo a otro directorio.
```bash
move archivo.extension ruta\nombre_del_archivo.extension
```
## `RMDIR` - `RD` (REMOVE DIRECTORY)
Permiten eliminar directorios vacíos.
```bash
// Opción 1
rmdir nombre_del_directorio
// Opción 2
rd nombre_del_directorio
``` | miltondiazco |
1,922,701 | Exploring the AI Revolution with Sista AI Agents | Discover the transformative power of voicebots with Sista AI. Join the AI revolution today! 🚀 | 0 | 2024-07-13T22:45:32 | https://dev.to/sista-ai/exploring-the-ai-revolution-with-sista-ai-agents-337l | ai, react, javascript, typescript | <h2>AI and the Future of Technology</h2><p>The rapid evolution of AI technology is reshaping industries worldwide, with innovations like Gemini 1.5 Pro expanding data analysis capabilities and Figma introducing new AI tools for streamlined design processes. Sista AI, a leading end-to-end AI integration platform, stands at the forefront of this revolution, empowering businesses with advanced AI solutions.</p><h2>The Role of AI Agents in Modern Business</h2><p>Sista AI's AI agents offer precise responses and intuitive user experiences, enhancing user engagement and operational efficiency. By seamlessly integrating AI assistants into apps, Sista AI transforms interactions and user experience dynamics, illustrating the power of AI in driving business success.</p><h2>Applications of AI Across Industries</h2><p>From Google's advanced AI models to Sista AI's Conversational AI agents, AI is revolutionizing interactions. Sista AI's technology unlocks endless possibilities, from boosting engagement by 65% to reducing support costs by 50%, driving business growth and enhancing user experiences across all industries.</p><h2>Empowering Businesses with Sista AI</h2><p>Sista AI offers a range of innovative features, from conversational AI agents to multi-tasking UI controllers, revolutionizing how businesses interact with technology. With Sista AI's easy software development kit and limitless scalability, businesses can quickly adapt to changing demands and enhance their operations.</p><h2>Experience the Future of AI with Sista AI</h2><p>Join the AI revolution with Sista AI and transform your business with cutting-edge AI solutions. Visit <a href='https://smart.sista.ai/?utm_source=sista_blog&utm_medium=blog_post&utm_campaign=Exploring_the_AI_Revolution_with_Sista_AI_Agents'> Sista AI</a> to experience the power of AI-driven interactions in today's digital landscape.</p><br/><br/><a href="https://smart.sista.ai?utm_source=sista_blog_devto&utm_medium=blog_post&utm_campaign=big_logo" target="_blank"><img src="https://vuic-assets.s3.us-west-1.amazonaws.com/sista-make-auto-gen-blog-assets/sista_ai.png" alt="Sista AI Logo"></a><br/><br/><p>For more information, visit <a href="https://smart.sista.ai?utm_source=sista_blog_devto&utm_medium=blog_post&utm_campaign=For_More_Info_Link" target="_blank">sista.ai</a>.</p> | sista-ai |
1,922,702 | Comandos de Fecha | DATE (FECHA) Este comando nos muestra la fecha actual y nos da la opción de poner una... | 0 | 2024-07-13T22:48:26 | https://dev.to/miltondiazco/comandos-de-fecha-306e | cmd, windows | ## `DATE` (FECHA)
Este comando nos muestra la fecha actual y nos da la opción de poner una nueva fecha.
```bash
// Opción 1: sin parámetros, muestra la fecha actual y permite poner una nueva fecha
date
// Opción 2: con parámetros (/t), solo muestra la fecha actual
date /t
```
**Nota:** Para poder cambiar la fecha, es necesario acceder al símbolo del sistema como administrador.
## `TIME` (HORA)
Este comando es parecido al anterior, pero solo muestra la hora actual y da la opción de cambiarla.
```bash
// Opción 1: sin parámetros, muestra la hora actual y permite cambiar la hora
time
// Opción 2: con parámetros (/t), solo muestra la hora actual
time /t
```
**Nota:** Para poder cambiar la hora, es necesario acceder al símbolo del sistema como administrador. | miltondiazco |
1,922,704 | Comandos Avanzados | SYSTEMINFO Muestra información detallada del PC y del sistema. systeminfo Enter... | 0 | 2024-07-13T22:50:34 | https://dev.to/miltondiazco/comandos-avanzados-3a10 | cmd, windows | ## `SYSTEMINFO`
Muestra información detallada del PC y del sistema.
```bash
systeminfo
```
## `TASKLIST`
Muestra un listado de los programas y tareas que se están ejecutando.
```bash
tasklist
```
## `TASKKILL -IM`
Permite cerrar un programa.
```bash
taskkill -im nombre_del_programa.exe
```
## `CONTROL KEYBOARD`
Muestra las propiedades del teclado.
```bash
control keyboard
```
## `DESK.CPL`
Abre las propiedades de la pantalla.
```bash
desk.cpl
```
## `CONTROL FONTS`
Muestra las fuentes que están instaladas en el sistema.
```bash
control fonts
```
## `CONTROL INTERNATIONAL` - `INTL.CPL`
Abren la configuración regional de fecha y hora.
```bash
// Opción 1
control international
// Opción 2
intl.cpl
```
## `APPWIZ.CPL`
Abre el programa especificado.
```bash
appwiz.cpl programa.exe
```
## `SYSDM.CPL`
Abre las propiedades del sistema.
```bash
sysdm.cpl
```
## `FSMGMT.MSC`
Abre las carpetas que estén compartidas.
```bash
fsmgmt.msc
```
## `SHUTDOWN`
Apaga el equipo.
```bash
shutdown
``` | miltondiazco |
1,922,706 | Remove Nth from end of linked list | In this post, I explore another linked list algorithm. This one is a bit harder. Create a function... | 27,729 | 2024-07-13T22:56:45 | https://dev.to/johnscode/remove-nth-from-end-of-linked-list-54bf | go, interview, programming | In this post, I explore another linked list algorithm. This one is a bit harder.
Create a function to remove the nth node from the end of a linked list.
This comes from a leetcode problem. As in the leetcode problem, 'n' is one-based and can go from 1 to the length of the list.
```
func (ll *LinkedList[T]) RemoveNthFromEnd(n int) *Node[T] {
if n == 0 {
return nil
}
fast := ll.Head // this moves to the end
slow := ll.Head // this should be one behind the nth from end
for count := 0; count < n; count++ {
if fast == nil { // list is too short
return nil
}
fast = fast.Next
}
if fast == nil { // special case, removing head
res := ll.Head
ll.Head = ll.Head.Next
return res
}
for fast != nil && fast.Next != nil {
slow = slow.Next
fast = fast.Next
}
res := slow.Next
slow.Next = slow.Next.Next
return res
}
```
The key to this is using dual pointers. We start by initializing a fast and a slow pointer to the head of the list.
Next, we move the fast pointer n nodes forward. In this way, the slow pointer is now 'n' behind the fast pointer. Now, we can move both pointers in lock step until fast is at the end.
We can then remove the nth to last node and return it.
Is there a better way? Let me know in the comments.
Thanks!
_The code for this post and all posts in this series can be found [here](https://github.com/johnscode/gocodingchallenges)_ | johnscode |
1,922,707 | How to upload image using multer and Express.js | In this blog post we will learn to upload image using multer. multer is a middleware of NodeJS to... | 0 | 2024-07-13T23:02:16 | https://dev.to/pmadhav82/how-to-upload-image-using-multer-and-expressjs-5a57 | node, express, javascript |
In this blog post we will learn to upload image using `multer`. `multer` is a middleware of NodeJS to handle file upload.
## Instalation
``` npm install multer ```
## Frontend
```
<div class="form-wrapper">
<h3>Upload Profile Picture</h3>
<div class="main">
<form action="/upload" method="POST" enctype="multipart/form-data">
<input type="file" accept="image/*" id="imageInput" name="userProfile" />
<button type="submit" id="submit" class="btn btn-primary">Upload</button>
</form>
<div class="image-preview">
<img id="imageOutPut" />
<p id="imageName"></p>
</div>
</div>
```
### Upload preview
Following code will enable the preview of choosen image
```javascript
let imageInput = document.getElementById("imageInput");
let imageOutput = document.getElementById("imageOutPut");
let imageName = document.getElementById("imageName");
imageInput.onchange = (ev)=>{
imageOutput.alt = "preview";
imageOutput.src = URL.createObjectURL(ev.target.files[0]);
imageName.innerHTML = `<b> ${ev.target.files[0].name} </b>`
imageOutput.onload = ()=>{
URL.revokeObjectURL(imageOutput.src);
}
}
```
## Backend
We have to setup basic `multer` configuration which includes where do we want to save uploaded image, what name do we want to set up. We can filter the file as well and we can set the file size limit.
``` javascript
//fineName: fileUpload.js
const multer = require("multer");
const path = require("path");
const upload = multer({
limits:800000,
storage: multer.diskStorage({
destination:(req,file,cb)=>{
cb(null,"upload/images")
},
filename:(req,file,cb)=>{
let ext = path.extname(file.originalname);
cb(null,`${someUniqueName}.${ext}`)
}
}),
fileFilter:(req,file,cb)=>{
const allowedFileType = ["jpg", "jpeg", "png"];
if(allowedFileType.includes(file.mimetype.split("/")[1])){
cb(null,true)
}else{
cb(null,false)
}
}
})
module.exports = upload;
```
### Explationation of above code
`multer` take 3 objects `limits`, `storage` and `fileFilter` as a parameter. `storage`have 2 parameter which are `diskStorage` and give full control on storing file to disk and `filename`.
Now, we can export this as a middleware and we can use to upload image as follow:
## Route setup to handle uploaded file
As our frontend form will hit the endpoint `/upload` we have to setup our route to handle this endpoint which has image in it plus we need to `require` the middleware that we created.
``` javascript
//fileName: route.js
const express = require ("express");
const router = express.Router();
const upload = require("./fileUpload");
router.post("/upload/", upload.single("userProfile"),(req,res)=>{
if(!req.file){
return res.redirect("/")
}
else{
let filePath = `images/${req.file.filename}`;
res.render("image",{
filePath
})
}
})
```
`upload.single()` will handle single image came from request and saved it to specified folder. The image is saved to `upload/images` folder.
Now, we have to make `upload` folder static so that images saved there can be served to the frontend and file path will be `images/${req.file.filename}` we can save this `imageURL` to the database as well.
``` javascript
//fileName:app.js
const route = require("./route");
const app = express();
const PORT = process.env.PORT || 8000
app.use(express.urlencoded({extended:true}))
//router connection
app.use("/", route);
//uses of public folder
app.use(express.static(path.join(__dirname,"/public")))
//app.use(express.static(path.join(__dirname,"/upload")))
app.use(express.static(`${__dirname}/upload`))
//init handlebars
app.engine("handlebars", handlebars());
app.set("view engine", "handlebars");
app.listen(PORT,()=>console.log(`Server is running on ${PORT}`))
```
This way you can upload image to the server using `Expressjs` with the help of `multer`.
### Thanks for reading. | pmadhav82 |
1,922,735 | Unlocking the Power of Docker: A Developer's Guide | Introduction In the ever-evolving world of software development, the need for efficient... | 0 | 2024-07-13T23:35:46 | https://dev.to/fernandomullerjr/unlocking-the-power-of-docker-a-developers-guide-5ca3 | docker, containers, devops | ## Introduction
In the ever-evolving world of software development, the need for efficient and scalable solutions has become increasingly crucial. One technology that has revolutionized the way we approach these challenges is Docker. Docker is a powerful platform that enables the creation and management of containerized applications, making it easier to develop, deploy, and run software in a consistent and reliable manner.
In this article, we will explore the benefits of Docker for developers, delving into the concepts of Docker Containers and Docker Compose, and how they can streamline your software development and deployment processes.
## What is a Docker Container?
At its core, a Docker Container is a lightweight, standalone, and executable software package that includes everything needed to run an application: the code, runtime, system tools, and libraries. This self-contained environment ensures that the application will run consistently across different computing environments, regardless of the underlying infrastructure.
Docker Containers are built using Docker images, which are essentially templates that define the contents of the container. These images can be created, shared, and used to spin up new containers, ensuring a consistent and reproducible development and deployment process.
One of the key advantages of Docker Containers for developers is their ability to isolate applications from the host system, preventing conflicts and ensuring that the application runs the same way regardless of the environment. This isolation also enhances security, as each container is a separate and secure environment, reducing the risk of cross-contamination between applications.
## What is Docker Compose?
While Docker Containers provide a powerful way to package and run individual applications, there are often scenarios where multiple containers need to work together to form a complete application stack. This is where Docker Compose comes into play.
Docker Compose is a tool that allows you to define and manage multi-container applications using a YAML configuration file. This file specifies the various services (containers) that make up the application, along with their dependencies, network configurations, and other settings.
With Docker Compose, you can easily spin up an entire application stack with a single command, ensuring that all the necessary components are started and configured correctly. This simplifies the deployment process and makes it easier to manage complex, multi-service applications.
Some of the key benefits of using Docker Compose for developers include:
1. **Simplified Configuration**: The YAML configuration file provides a clear and concise way to define the structure of your application, making it easier to understand and maintain.
2. **Consistent Deployment**: Docker Compose ensures that your application is deployed the same way across different environments, reducing the risk of inconsistencies and errors.
3. **Scalability**: Docker Compose makes it easy to scale individual services within your application, allowing you to handle increased traffic or resource demands.
4. **Dependency Management**: Docker Compose automatically manages the dependencies between your application's services, ensuring that they are started and stopped in the correct order.
## Integrating Docker Containers and Docker Compose into Your Development Workflow
As a developer, incorporating Docker Containers and Docker Compose into your development workflow can provide numerous benefits. By leveraging these technologies, you can:
1. **Streamline Development**: Docker Containers allow you to create consistent development environments, ensuring that your application runs the same way on your local machine as it does in production.
2. **Improve Collaboration**: With Docker, you can easily share your development environment with your team, making it easier to collaborate on projects and ensure consistency across different machines.
3. **Enhance Portability**: Docker Containers are highly portable, allowing you to easily move your application between different computing environments, such as development, staging, and production.
4. **Simplify Deployment**: Docker Compose makes it easy to deploy your entire application stack, reducing the complexity and potential for errors during the deployment process.
5. **Increase Scalability**: Docker Compose enables you to scale individual services within your application, allowing you to handle increased traffic or resource demands.
To learn more about how to effectively use Docker Compose, we recommend checking out the [What is Docker Compose Used For?](https://devopsmind.com.br/en/docker-en-us/what-is-docker-compose-used-for/) article on [devopsmind.com.br](https://devopsmind.com.br).
## Conclusion
Docker Containers and Docker Compose are powerful tools that have transformed the way we develop, package, and deploy applications. By incorporating these technologies into your development workflow, you can create consistent, scalable, and secure software environments, ultimately improving the efficiency and reliability of your software development and deployment processes. | fernandomullerjr |
1,922,737 | How to Remove Duplicate Paths in ZSH on MacOS | Having duplicate paths in your PATH variable can clutter your environment and lead to unexpected... | 0 | 2024-07-13T23:42:42 | https://dev.to/deni_sugiarto_1a01ad7c3fb/how-to-remove-duplicate-paths-in-zsh-on-macos-3l68 | terminal, zsh, developer | Having duplicate paths in your PATH variable can clutter your environment and lead to unexpected behavior when running commands. On macOS, using the ZSH shell, you can easily remove these duplicates to ensure a clean and efficient path configuration. Here’s a quick guide on how to do it using the typeset -U PATH command.
#What is the PATH Variable?
The PATH variable is a crucial component of your shell environment. It defines the directories in which the shell looks for executable files in response to commands issued by the user. Over time, you might accumulate duplicate entries in your PATH, leading to inefficiencies and potential conflicts.
#Why Remove Duplicates?
- Efficiency: A cleaner PATH means the shell can locate executables faster.
- Avoid Conflicts: Prevents potential issues where the shell might pick the wrong version of an executable.
- Maintainability: Easier to manage and understand your environment settings.
#Step-by-Step Guide to Remove Duplicate Paths in
1. Open Your Terminal:
Start by opening your terminal application.
2. Add the Command to Remove Duplicates:
Insert the following line into your .zshrc file. This command will ensure that your PATH variable contains unique entries.
ZSH
```
typeset -U PATH
```
#Verification
To verify that the duplicates have been removed, you can print the PATH variable and inspect it:
```
echo $PATH
```
You should see that all the paths listed are unique.
#Conclusion
You can keep your PATH variable clean and efficient by running the command typeset -U PATH in your terminal. This simple step ensures that your shell environment remains optimized, preventing potential conflicts and improving command lookup times. Maintaining a tidy PATH is a small but significant aspect of system administration and personal environment management. | deni_sugiarto_1a01ad7c3fb |
1,922,738 | A Minimalist, Adaptive Computing Framework. | This repository contains source code for a minimalist, adaptive computing framework written in... | 0 | 2024-07-13T23:51:34 | https://dev.to/rperezrosario/minimalist-adaptive-computing-framework-35gk | geneticalgorithms, csharp, dotnet | This repository contains source code for a minimalist, adaptive computing framework written in C#.
https://github.com/rperez-rosario/AdaptiveComputingFramework | rperezrosario |
1,922,746 | Is Transitioning from React.js to React Native as Easy as It Seems? 🚀📱 | Is Transitioning from React.js to React Native as Easy as It Seems? 🚀📱 Transitioning from... | 0 | 2024-07-14T00:30:07 | https://dev.to/sh20raj/is-transitioning-from-reactjs-to-react-native-as-easy-as-it-seems-3emj | react, javascript, webdev, reactnative | ## Is Transitioning from React.js to React Native as Easy as It Seems? 🚀📱
Transitioning from React.js to React Native can be an exciting journey for web developers looking to enter the world of mobile app development. Both frameworks share a similar foundation, but there are key differences that developers need to understand. Let's dive into the similarities, differences, challenges, and some sample code snippets to make your transition smoother.
### Similarities Between React.js and React Native ✨
1. **Component-Based Architecture**: Both React.js and React Native use a component-based architecture. This means you can reuse your knowledge of building components in React.js when developing in React Native. For example:
**React.js:**
```jsx
// ButtonComponent.js
import React from 'react';
const ButtonComponent = ({ text, onClick }) => {
return <button onClick={onClick}>{text}</button>;
};
export default ButtonComponent;
```
**React Native:**
```jsx
// ButtonComponent.js
import React from 'react';
import { Button } from 'react-native';
const ButtonComponent = ({ text, onPress }) => {
return <Button title={text} onPress={onPress} />;
};
export default ButtonComponent;
```
2. **JavaScript**: If you're familiar with JavaScript, you already have a significant advantage. Both frameworks use JavaScript as the primary programming language.
3. **State and Props**: The concepts of state and props are identical in both React.js and React Native. Managing component state and passing data between components follows the same patterns.
4. **React Hooks**: You can use React Hooks in both React.js and React Native to manage state and lifecycle methods more efficiently.
5. **Declarative UI**: Both frameworks emphasize a declarative approach to building user interfaces. You describe what the UI should look like, and the framework takes care of updating the view.
### Differences Between React.js and React Native 🔍
1. **Platform-Specific Components**: React Native provides a set of native components like `<View>`, `<Text>`, and `<ScrollView>`, which differ from the HTML elements used in React.js. These components are designed to work seamlessly on mobile platforms.
**React.js:**
```jsx
// App.js
import React from 'react';
const App = () => {
return (
<div>
<h1>Hello, World!</h1>
<p>Welcome to my React.js app!</p>
</div>
);
};
export default App;
```
**React Native:**
```jsx
// App.js
import React from 'react';
import { View, Text } from 'react-native';
const App = () => {
return (
<View>
<Text style={{ fontSize: 24 }}>Hello, World!</Text>
<Text>Welcome to my React Native app!</Text>
</View>
);
};
export default App;
```
2. **Styling**: While React.js uses CSS for styling, React Native uses a JavaScript-based styling approach. Styles are defined using objects, similar to inline styles in React.js.
**React.js (CSS):**
```css
/* styles.css */
.container {
padding: 20px;
}
.header {
font-size: 24px;
color: blue;
}
```
**React Native (JavaScript):**
```jsx
// App.js
import React from 'react';
import { View, Text, StyleSheet } from 'react-native';
const App = () => {
return (
<View style={styles.container}>
<Text style={styles.header}>Hello, World!</Text>
</View>
);
};
const styles = StyleSheet.create({
container: {
padding: 20,
},
header: {
fontSize: 24,
color: 'blue',
},
});
export default App;
```
3. **Navigation**: Navigation in React Native is handled differently, often requiring the use of libraries like React Navigation. This can be a bit of a learning curve if you're used to React Router in React.js.
**React.js (React Router):**
```jsx
// App.js
import React from 'react';
import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';
import Home from './Home';
import About from './About';
const App = () => {
return (
<Router>
<Switch>
<Route path="/" exact component={Home} />
<Route path="/about" component={About} />
</Switch>
</Router>
);
};
export default App;
```
**React Native (React Navigation):**
```jsx
// App.js
import React from 'react';
import { NavigationContainer } from '@react-navigation/native';
import { createStackNavigator } from '@react-navigation/stack';
import Home from './Home';
import About from './About';
const Stack = createStackNavigator();
const App = () => {
return (
<NavigationContainer>
<Stack.Navigator initialRouteName="Home">
<Stack.Screen name="Home" component={Home} />
<Stack.Screen name="About" component={About} />
</Stack.Navigator>
</NavigationContainer>
);
};
export default App;
```
4. **Native Modules**: React Native allows you to write native code for iOS and Android to extend the functionality of your app. This is not something you'd typically do in a React.js project.
5. **Animations**: While both frameworks support animations, React Native provides the Animated API and libraries like Reanimated for more complex animations tailored to mobile devices.
**React Native (Simple Animation):**
```jsx
// AnimatedBox.js
import React, { useRef, useEffect } from 'react';
import { Animated, View, StyleSheet } from 'react-native';
const AnimatedBox = () => {
const fadeAnim = useRef(new Animated.Value(0)).current;
useEffect(() => {
Animated.timing(fadeAnim, {
toValue: 1,
duration: 2000,
useNativeDriver: true,
}).start();
}, [fadeAnim]);
return (
<Animated.View style={[styles.box, { opacity: fadeAnim }]} />
);
};
const styles = StyleSheet.create({
box: {
width: 100,
height: 100,
backgroundColor: 'blue',
},
});
export default AnimatedBox;
```
### Challenges in Transitioning 🚧
1. **Learning New Components**: You'll need to familiarize yourself with React Native components and how they differ from HTML elements. This can take some time but is essential for building mobile apps.
2. **Platform-Specific Code**: Understanding platform-specific differences (iOS vs. Android) and how to handle them in your code is crucial. React Native provides ways to write platform-specific code, but it requires careful consideration.
3. **Performance Optimization**: Mobile performance optimization techniques can differ from web optimization. You'll need to learn best practices for optimizing your React Native apps to ensure smooth performance on mobile devices.
4. **Debugging**: Debugging in a mobile environment can be more complex than in a web environment. Tools like React Native Debugger and Flipper can help, but there's a learning curve involved.
5. **Third-Party Libraries**: While many React.js libraries have React Native equivalents, not all do. You might need to find alternative libraries or write custom solutions for certain functionalities.
### Tips for a Smooth Transition 🌟
1. **Start Small**: Begin with a small project or a simple app to get a feel for React Native. This will help you build confidence and understand the differences without being overwhelmed.
2. **Leverage Existing Knowledge**: Use your existing knowledge of React.js to your advantage. Focus on learning the new aspects of React Native while applying familiar concepts where applicable.
3. **Use Documentation and Community Resources**: React Native has excellent documentation and a vibrant community. Use these resources to find answers to your questions and stay updated with best practices.
4. **Practice**: The more you practice, the more comfortable you'll become. Build sample apps, experiment with different components, and tackle small challenges to improve your skills.
5. **Stay Patient**: Transitioning to a new framework takes time and effort. Be patient with yourself and embrace the learning process. Over time, you'll become proficient in React Native and unlock new possibilities for mobile app development.
### Conclusion 🎉
Transitioning from React.js to React Native is a rewarding experience that opens up new opportunities in mobile app development. While there are differences and challenges, your existing knowledge of React.js provides a strong foundation. With practice, patience, and a willingness to learn, you'll find that the transition is not only feasible but also enjoyable. Embrace the journey and start building amazing mobile apps with React Native! 🚀📱
---
Feel free to reach out to the React Native community, explore more tutorials, and build small projects to get hands-on experience. Happy coding! | sh20raj |
1,922,739 | An E-Commerce Web Application | This repository contains an e-commerce web application built using SQL Server, EF, ASP. NET Core MVC,... | 0 | 2024-07-13T23:56:18 | https://dev.to/rperezrosario/an-e-commerce-web-application-40d9 | csharp, sqlserver, javascript, aspdotnet | This repository contains an e-commerce web application built using SQL Server, EF, ASP. NET Core MVC, C#, Javascript and an assortment of libraries and web services.
https://github.com/rperez-rosario/XO | rperezrosario |
1,922,740 | Securing Your Azure Web Application with Azure Firewall (Part 3) | Introduction: This blog post is part 3 of a series on securing your Azure environment. In the... | 0 | 2024-07-17T21:58:52 | https://dev.to/jimiog/securing-your-azure-web-application-with-azure-firewall-part-3-2j2d | azure, cloud, network, security | **Introduction:**
This blog post is part 3 of a series on securing your Azure environment. In the [previous parts](https://dev.to/jimiog/enhanced-web-application-security-with-azure-network-security-groups-and-application-security-groups-part-2-2po8), we created a virtual network and implemented a Network Security Group (NSG) for basic isolation. Now, we'll take things a step further and secure your web application using Azure Firewall for advanced traffic filtering. As a reminder, the images show Canada Central but if you're following along, use US East.
### Setting Up the Firewall Subnet
1. Navigate to **Virtual Networks** in the Azure portal search bar and select your application network.
2. Under **Subnets**, click **+ Subnet**.
3. Name the subnet **AzureFirewallSubnet** and use the address range **10.1.63.0/24**. Leave other settings default and click **Add**.
### Creating the Azure Firewall
1. Search for **Firewall** in the portal and click it.
2. Click **+ Create**.
3. Configure the firewall settings as follows:
* Name: Choose a descriptive name for your firewall.
* SKU: Select the Standard Firewall SKU (adjust based on needs).
* Management: Choose "Firewall policy to manage this firewall".
* Firewall Policy: Click "Add new" and name the policy **fw-policy**.
* Location: Select the appropriate region.
* Tier: Choose the Standard Policy Tier.
* Virtual Network: Select "Use existing" and choose your application virtual network.
* Public IP Address: Click "Create new" and name the IP address **fwpip**.
4. Review your settings and click **Create**.
### Configuring Firewall Policies
1. Search for **Firewall Policies** in the portal and select **fw-policy**.
2. Under **Settings**, navigate to **Application Rules**.
3. Click **Add a Rule Collection** and configure it as follows:
* Name: Choose a clear name for the rule collection.
* Type: Select "Application".
* Priority: Set to 200.
* Action: Allow
* Rule Collection Group: DefaultApplicationRuleCollectionGroup
4. Under **Rules** create a rule named **AllowAzurePipelines**. Configure it to allow HTTPS traffic from the source IP range 10.1.0.0/23 to the destination FQDNs dev.azure.com and azure.microsoft.com.
5. Navigate to **Network Rules** and click **+ Add a rule collection**.
6. Configure the network rule collection as follows:
* Name: Choose a clear name for the rule collection.
* Type: Network
* Priority: Set to 200.
* Action: Allow
* Rule Collection Group: DefaultNetworkRuleCollectionGroup
7. Under **Rules** create a rule named **AllowDns**. Configure it to allow UDP traffic on ports 53 to the destination IP addresses 1.1.1.1 and 1.0.0.1, with a source IP range of 10.1.0.0/23.
8. Click **Add** to create the rule.
### Verifying Deployment
1. Search for **Firewall** in the portal and select your application firewall. Verify the **Provisioning state** is "Succeeded".
2. Navigate to the firewall policy (**fw-policy**) and ensure its **Provisioning state** is also "Succeeded".
**Conclusion**
By following these steps, you've successfully deployed an Azure Firewall with basic rules to allow secure access for your web application. Remember to adjust the specific rules based on your application's requirements.
| jimiog |
1,922,742 | Founders Academy Workbook | Founders Academy Workbook is given out on after the last day of the workshop. It summarizes the... | 0 | 2024-07-14T00:01:01 | https://dev.to/theholyspirit/founders-academy-workbook-3370 | founder, startup, capital, resources | Founders Academy Workbook is given out on after the last day of the workshop. It summarizes the presentation content in reading format.
[Founders Academy Essentials Workbook](https://docs.google.com/document/d/170QE8T5DllHhABS5ZBAWFMCKiGt6omMeQBGvBofRpAM/edit?usp=sharing)
Gordon Daugherty, www.shockwaveinnovations.com | theholyspirit |
1,922,743 | The Complete Guide to CSS object-fit Property | The Complete Guide to CSS object-fit: Key to Handling Images on the Web ... | 0 | 2024-07-14T00:05:53 | https://dev.to/moondaeseung/the-complete-guide-to-css-object-fit-property-3apa | # The Complete Guide to CSS object-fit: Key to Handling Images on the Web
## Introduction: Why You Need to Know object-fit
Dealing with images in web development has always been a challenging task. How can we consistently display images of various sizes and ratios? This is where the CSS `object-fit` property plays a crucial role.
Understanding `object-fit` means more than just displaying images correctly. Recently, many cloud services that automatically adjust the size of user-uploaded images have been offering `object-fit` as an option. Therefore, if you don't understand the exact behavior of `object-fit`, you might unintentionally provide a negative user experience during the image optimization process.
## Basic Concepts of object-fit
The `object-fit` property determines how an image will be cropped or scaled to fit within the specified size (container size) of an `<img>` or `<video>` tag, in relation to the original image size.
An important point to note is that when only `width` or `height` is specified, the other dimension is automatically determined based on the original image ratio. In this case, for all `object-fit` values except `scale-down` and `none`, the image will fill the container size while maintaining its aspect ratio. However, with `scale-down` and `none`, if the container size is larger than the image size, the image will maintain its original size without stretching.
## object-fit Values and Their Effects
### 1. contain
```
Container
+--------------------+
| Image |
|:------------------:|
|: :|
|: :|
|: :|
|: :|
|:------------------:|
| |
+--------------------+
```
- Adjusts the image to be fully visible
- Maintains image aspect ratio
- May result in empty space within the container
### 2. cover
```
Image
:######################:
:# #:
:# Container #:
:# +------------+ #:
:# | | #:
:# | | #:
:# | | #:
:# +------------+ #:
:# #:
:######################:
```
- Completely fills the container
- Maintains image aspect ratio
- May crop parts of the image
### 3. fill
- Completely fills the container
- Ignores image aspect ratio (may distort the image)
### 4. none
- Maintains original image size
- Ignores container size (image may be clipped)
### 5. scale-down
- Displays the image at the smaller size between `none` and `contain`
- Prevents the image from stretching
## Image Widget in Flitter
The Flitter library also provides an Image widget that implements the behavior of `object-fit`. Flitter's Image widget is designed to behave as similarly as possible to the native HTML `<img>` tag and supports various `object-fit` options.
```typescript
Image({
src: 'https://flitter.dev/examples/object-fit/profile.jpg',
width: 750,
height: 250,
objectFit: 'none'
})
```
If you want to see various examples of `object-fit`, visit the following URL: [https://flitter.dev/examples/object-fit](https://flitter.dev/examples/object-fit)
## Conclusion
The `object-fit` property is a powerful tool for handling images on the web. By properly understanding and using it, developers can effectively manage images of various sizes and ratios, providing users with a consistent visual experience. Understanding `object-fit` becomes even more important when using image optimization services. We hope this guide helps you handle images more effectively in your web projects. | moondaeseung | |
1,922,744 | Founders Academy Day 1 | At the start Start with a list of assumptions I believe, we believe Audience experiences pain They... | 0 | 2024-07-14T00:17:02 | https://dev.to/theholyspirit/founders-academy-day-1-pa4 | startup, founder | At the start
Start with a list of assumptions
I believe, we believe
Audience experiences pain
They want to eliminate pain for benefit
They would choose us over alts for reasons
We believe audience would spend money to eliminate pain
Etc
Add how important is it this this true
Next question
How many potential users do you need to talk to
As many as necessary until you start getting similar response from most/many (hundreds or so)
Questions should be open-ended
(Do you agree that…)is closed ended. Injects opinion etc
How do you… Tell me about a time when… are open ended, less likely bias injected
If you are fortunate you will solve a problem that is Top 3 pain in the ass problem, not 8 or 15.
To ask people this question, get off the phone and out of the office, visit prospective customers in their natural environment
(you will find them more honest, open, you’ll be amazed at discovering new things, have them walk through their current process or solution)
Don’t just thank them for their time,
At the end of interview, recap what you heard and ask them to confirm you’ve got it right.
Show you were paying attention, give opportunity for clarify, ask if they want to be notified of release and/org beta test)
Feasibility
When start building think minimal, manual, crappy, local, throwaway, redo
MVP
Visually: it is not car tire, then axel, then cabin then running car
It is skateboard, scooter, bike, motorcycle, car
I.e minimum viable product entirely viable for problem
If it’s a “Top 3 pain in the ass”, the people will use the skateboard
Idea development homework
1. Business plan assumption: tell me which assumptions are already validated (investors want to hear what assumptions money is going toward validating)
2. Customer discovery interviews: if you cannot get to who you need to talk to, it is a survivability test. Pharmaceutical reps practice like lobbyists.
Bias influences your pen on the paper (when interviewing)
| theholyspirit |
1,922,747 | SEEKING A PROFESSIONAL HACKING SERVICE ONLINE // CONSULT DIGITAL WEB RECOVERY | The labyrinthine world of online investments, promises of wealth often collide with the harsh reality... | 0 | 2024-07-14T00:32:47 | https://dev.to/digitalwebrecovery/seeking-a-professional-hacking-service-online-consult-digital-web-recovery-i2k | The labyrinthine world of online investments, promises of wealth often collide with the harsh reality of deception. My name is not important, but my cautionary tale resonates deeply with those who navigate the treacherous waters of cryptocurrency. It began with a seductive offer—a chance to multiply my wealth through a seemingly reputable online investment company. Little did I know, this decision would lead me down a path fraught with betrayal and financial ruin.The company's pitch was convincing: invest in cryptocurrency with the potential for substantial returns. Eager to capitalize on the burgeoning market, I entrusted over $85,000 of my hard-earned money into their hands. Initial transactions seemed promising, fueling my optimism and reinforcing the belief that I had made a sound financial decision.However, as the global pandemic cast a shadow of uncertainty over financial markets, I found myself in need of liquidity. Withdrawing a portion of my investment seemed prudent, yet this simple request unraveled a sinister truth. Instead of facilitating the withdrawal, the company demanded more funds—an absurd requirement given their failure to honor my initial request.Suspicion turned to alarm when their responses devolved into a litany of excuses and delays. Calls went unanswered, emails languished in inbox purgatory—each attempt to reclaim my money met with stony silence. It became painfully clear: I had fallen victim to a calculated scheme, engineered to exploit trust and exploit my financial vulnerability.Frustration turned to despair as I contemplated the loss of my life savings. It was at this lowest ebb that a glimmer of hope emerged—a friend, privy to my plight, suggested Digital Web Recovery. Skeptical yet desperate, I decided to place my faith in their expertise.From the outset, Digital Web Recovery demonstrated unparalleled professionalism and determination. They listened attentively as I recounted my ordeal, offering reassurance and a clear path forward. Unlike the faceless company that had ensnared me, Digital Web Recovery operated with transparency and integrity.Their approach was methodical: gathering evidence, navigating legal complexities, and leveraging their network to expedite resolution. True to their reputation, they acted swiftly and decisively, ensuring that justice was not just served, but swiftly delivered. Within a surprisingly short timeframe, I received confirmation—the entirety of my investment had been successfully recovered.Relief washed over me like a tidal wave, replacing months of anguish with a newfound sense of security. Digital Web Recovery had not only restored my financial stability but also rekindled my faith in justice. Their dedication and expertise transcended mere business—they restored my faith in humanity's capacity for decency and compassion.To those who find themselves ensnared in similar predicaments, my advice is unequivocal: trust in Digital Web Recovery. They are more than mere recovery specialists; they are guardians of justice in a digital realm fraught with peril. Their track record speaks volumes, offering solace to countless individuals who have fallen victim to online deception.I extend my deepest gratitude to Digital Web Recovery for their unwavering support and unwavering commitment. Telegram; @digitalwebrecovery
Website https://digitalwebrecovery.com Email; digitalwebexperts@zohomail.com
They are beacons of hope amidst the murky waters of financial malfeasance, standing as a testament to the triumph of integrity over deceit.
 | digitalwebrecovery | |
1,922,748 | QR Code Component for Spotify Playlist | Hello Dev.to community! I've recently developed a QR Code Component for Spotify Playlist using HTML,... | 0 | 2024-07-14T00:37:02 | https://dev.to/der12kl/qr-code-component-for-spotify-playlist-52l8 | webdev, javascript, css, html | Hello Dev.to community!
I've recently developed a QR Code Component for Spotify Playlist using HTML, CSS, and JavaScript. It allows users to easily scan a QR code and access my curated 'Top Music' playlist on Spotify.
Check out the full project on GitHub: [GitHub Repository](https://github.com/Der12kl/QRcodecomponent) and see the live version here: [Live Version](https://der12kl.github.io/QRcodecomponent/).
I'm looking forward to hearing your thoughts and suggestions! | der12kl |
1,922,749 | Understanding Higher-Order Functions in JavaScript | Introduction Higher-order functions are an important concept in JavaScript programming.... | 0 | 2024-07-14T00:37:29 | https://dev.to/kartikmehta8/understanding-higher-order-functions-in-javascript-18hh | javascript, webdev, programming, tutorial | ## Introduction
Higher-order functions are an important concept in JavaScript programming. They allow for more efficient and dynamic coding by treating functions as first-class citizens and passing them as arguments or returning them as values. Understanding higher-order functions can greatly improve one's proficiency in JavaScript programming. In this article, we will discuss the advantages, disadvantages, and features of higher-order functions in JavaScript.
## Advantages of Higher-Order Functions
One of the main advantages of higher-order functions is code reusability. By passing functions as arguments, we can avoid repeating code and make our codebase more maintainable. Higher-order functions also allow for the creation of more dynamic and flexible code. For example, we can pass in different functions to perform a task based on certain conditions.
## Disadvantages of Higher-Order Functions
While higher-order functions offer many benefits, they can also lead to more complex and difficult to understand code. Care must be taken when using higher-order functions to ensure that the code remains readable and maintainable. Additionally, working with multiple nested higher-order functions can sometimes result in performance issues.
## Features of Higher-Order Functions
Higher-order functions have four key features:
1. **Take Functions as Arguments:** They can accept functions as parameters, allowing for flexible code structures.
2. **Return Functions as Values:** They can return functions, enabling the creation of function factories.
3. **Assigned to Variables:** They can be assigned to variables, enhancing the dynamic use of functions.
4. **Nested Inside Other Functions:** They can be nested, which allows for creating complex function compositions.
### Example of Higher-Order Functions in JavaScript
```javascript
// A higher-order function that takes another function as an argument
function repeat(n, action) {
for (let i = 0; i < n; i++) {
action(i);
}
}
// Using the higher-order function
repeat(3, console.log);
// A higher-order function that returns another function
function greaterThan(n) {
return m => m > n;
}
let greaterThan10 = greaterThan(10);
console.log(greaterThan10(11)); // Outputs: true
```
## Conclusion
In conclusion, higher-order functions are a powerful feature in JavaScript that can greatly enhance the functionality and maintainability of our code. By understanding their advantages, disadvantages, and features, we can utilize them effectively in our programming. With practice and proper implementation, higher-order functions can greatly improve the efficiency and scalability of our JavaScript projects. | kartikmehta8 |
1,922,750 | Simplest Chrome Extension Tutorial for 2024 Using Manifest V3 | Creating a Color Changer Chrome Extension This tutorial will guide you through creating a... | 0 | 2024-07-14T00:41:51 | https://dev.to/azadshukor/simplest-chrome-extension-tutorial-for-2024-using-manifest-v3-h3m | ## Creating a Color Changer Chrome Extension
This tutorial will guide you through creating a Chrome extension that changes the background color of web pages and keeps track of how many times the color has been changed.
### Step 1: Set Up the Folder Structure
First, create a new folder for your extension with the following structure:
```
my-extension/
│
├── manifest.json
├── background.js
├── popup/
│ ├── popup.html
│ └── popup.js
└── content_scripts/
└── content.js
```
### Step 2: Create the Manifest File
The `manifest.json` file is the heart of your Chrome extension. It tells Chrome about your extension, its capabilities, and the files it needs to function.
Create a file named `manifest.json` in the root of your extension folder with the following content:
```
{
"manifest_version": 3,
"name": "Color Changer",
"version": "1.0",
"description": "Changes webpage background color",
"permissions": ["activeTab", "storage"],
"background": {
"service_worker": "background.js"
},
"content_scripts": [
{
"matches": ["<all_urls>"],
"js": ["content_scripts/content.js"]
}
],
"action": {
"default_popup": "popup/popup.html"
}
}
```
Explanation:
- `manifest_version`: Specifies we're using Manifest V3, the latest version for Chrome extensions.
- `permissions`: Requests access to the active tab and storage API.
- `background`: Specifies the background script file.
- `content_scripts`: Defines which script should be injected into web pages.
- `action`: Specifies the HTML file for the extension's popup.
### Step 3: Create the Popup HTML
Create a file named popup.html in the popup folder:
```
<!DOCTYPE html>
<html>
<head>
<title>Color Changer</title>
<style>
body {
width: 200px;
padding: 10px;
}
button {
width: 100%;
padding: 5px;
margin-bottom: 10px;
}
</style>
</head>
<body>
<button id="changeColor">Change Color</button>
<p>Color changed <span id="count">0</span> times</p>
<script src="popup.js"></script>
</body>
</html>
```
This creates a simple popup with a button and a counter. I've added some basic CSS to improve the layout.
### Step 4: Create the Popup JavaScript
Create a file named popup.js in the popup folder:
```
document.addEventListener('DOMContentLoaded', function() {
var changeColor = document.getElementById('changeColor');
var countSpan = document.getElementById('count');
// Load the current count
chrome.storage.sync.get('colorCount', function(data) {
countSpan.textContent = data.colorCount || 0;
});
changeColor.addEventListener('click', function() {
chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
chrome.tabs.sendMessage(tabs[0].id, {action: "changeColor"}, function(response) {
console.log(response);
});
});
// Increment the count
chrome.storage.sync.get('colorCount', function(data) {
var newCount = (data.colorCount || 0) + 1;
chrome.storage.sync.set({colorCount: newCount});
countSpan.textContent = newCount;
});
// Notify background script
chrome.runtime.sendMessage({action: "colorChanged"});
});
});
```
Explanation:
- We wait for the DOM to load before attaching event listeners.
- We retrieve the current color change count from storage and display it.
When the button is clicked, we:
- Send a message to the content script to change the page color.
- Increment the color change count and update it in storage and on the popup.
- Send a message to the background script to log the change.
### Step 5: Create the Background Script
Create a file named background.js in the root of your extension folder:
```
chrome.runtime.onInstalled.addListener(function() {
chrome.storage.sync.set({colorCount: 0});
});
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
if (request.action === "colorChanged") {
console.log("Background color was changed");
}
}
);
```
Explanation:
- When the extension is installed, we initialize the color count to 0.
- We listen for messages from other parts of the extension. When a "colorChanged" message is received, we log it to the console.
### Step 6: Create the Content Script
Create a file named content.js in the content_scripts folder:
```
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
if (request.action === "changeColor") {
document.body.style.backgroundColor = getRandomColor();
sendResponse({status: "Color changed"});
}
}
);
function getRandomColor() {
var letters = '0123456789ABCDEF';
var color = '#';
for (var i = 0; i < 6; i++) {
color += letters[Math.floor(Math.random() * 16)];
}
return color;
}
```
Explanation:
- This script listens for messages from the popup.
- When it receives a "changeColor" message, it changes the page's background color to a random color.
- The getRandomColor() function generates a random hex color code.
### Step 7: Load and Test the Extension
- Open Chrome and go to chrome://extensions/
- Enable "Developer mode" in the top right corner.
- Click "Load unpacked" and select your extension folder.
- Your extension should now appear in the Chrome toolbar.
- Open any webpage and click on your extension icon.
- Click the "Change Color" button and observe:
The webpage's background color should change.
The count in the popup should increment.
Check the background script's console (in the extensions page) for the log message.
| azadshukor | |
1,922,751 | Find something worth solving, not what you can solve. | I follow how software and programs were developed back in the day; one of my favorites is the... | 0 | 2024-07-14T00:52:58 | https://dev.to/waqas334/find-something-worth-solving-not-what-you-can-solve-52ln | motivation, programming, productivity, learning |
I follow how software and programs were developed back in the day; one of my favorites is the creation of VisiCalc. When the computer keyboard used to have only left and right keys, no up and down keys, they developed a spreadsheet software. Isn't that amazing?
After reading a couple of articles and watching some videos, I wrote the calculation in my personal-tech diary:
"Don't think of it as if the problem is actually solvable by you or not. Or it must be easy, there could be a possibility that you need to go extra mile to bring it to life."
"The only thing you need to think about is that the problem actually exists and people are willing to pay to get it solved" 20th December 2023
Consider it as a signal to start working on the idea that you think it's too big for you.
Cheers.
PS: Pardon my handwriting, I am better at typing. :) | waqas334 |
1,922,752 | A little about promises in Javascript | JavaScript is a synchronous programming language; however, due to the callback functions, we can make... | 0 | 2024-07-14T00:53:51 | https://dev.to/joaoreider/a-little-about-promises-in-javascript-4oh7 | JavaScript is a **synchronous** programming language; however, due to the callback functions, we can make it work as an asynchronous programming language.
The concept of promises are very similar to promises we make in real life, we guarantee that something will be done. A promise can be **kept** or **broken** and you hope to know what the promise ended up being.
In terms of code, this is precisely what occurs. Promises can assume the statuses of pending, resolved, or rejected.
The promise object possesses both **prototype methods** and **static methods**. The prototypes are those that can only be applied to instances of the promise class. There are three prototypes: then, catch, finally. They all return a promise and handle the states of onFulfilled, onRejected, onFinally, respectively.
There are 4 static methods: **reject** and **resolve**, which help you create resolved or rejected promises and **all** and **race**. “all” receives an array of promises and returns a promise that resolves when all past promises are resolved or a promise that rejects with the reason for the first promise that was rejected. “race” also receives an array of promises and returns a promise that is resolved or rejected as soon as one of the passed promises is resolved or rejected. All promises run in parallel. This is an interesting feature that allows you to improve the performance of your code.
In modern JavaScript code, you will see a lot of use of **async** and **await**, which were introduced to simplify promise management with much more readable code. Async declares a function as asynchronous and await waits for promises to be resolved, pausing execution until the promise is resolved or rejected. This new nomenclature is more modern and avoids the famous “callback hell” (deep nesting of callbacks) of javascript.
_Callback hell Example:_
```
function main() {
getUserData(1, (err, userData) => {
if (err) {
console.error(err);
return;
}
getUserOrders(userData.userId, (err, orders) => {
if (err) {
console.error(err);
return;
}
getOrderProducts(orders[0].orderId, (err, products) => {
if (err) {
console.error(err);
return;
}
processProducts(products, (err, result) => {
if (err) {
console.error(err);
return;
}
console.log(result);
});
});
});
});
}
```
_async/await_
```
async function main() {
try {
const userData = await getUserData(1);
const orders = await getUserOrders(userData.userId);
const products = await getOrderProducts(orders[0].orderId);
const result = await processProducts(products);
console.log(result);
} catch (error) {
console.error(error);
}
}
```
In summary, Promises are a powerful tool in JavaScript for handling **asynchronous operations**, providing a clear and structured way to manage the flow of asynchronous code execution. With the introduction of async/await, promise management has become even more intuitive, allowing developers to write asynchronous code that resembles synchronous code in terms of readability and maintainability. Understanding and using promises effectively is essential for developing modern and efficient JavaScript applications.
Thank you for reaching this point. If you need to contact me, here is my email: joaopauloj405@gmail.com
| joaoreider | |
1,922,753 | Understanding Cohesion | I just finished learning about Cohesion and it's part and here is a summary. What is... | 0 | 2024-07-14T01:05:12 | https://dev.to/waqas334/understanding-cohesion-h9o | architecture, designpatterns | I just finished learning about Cohesion and it's part and here is a summary.
## What is it?
It is how your module is structured, not how it communicates/integrates with another module. That is a couple.
## There are 7 types of Cohesion
The best one is **Function Cohesion**, where everything that helps do a specific well-defined task is kept in one module. Like an Authentication Module, which offers functionality like login, logout, forgot password, etc
The worst one is **Coincidental Cohesion**, where there is no specific relation between the elements, except that they are at the same place. Consider a Utility module that has all sort of functions like String Format, Printing Log, Creating New File, etc.
The other ones didn't look interesting to me, they were like different sides of the same coin.
| waqas334 |
1,922,775 | Configuring Routes for Azure Firewall (Part 4) | Introduction: In the previous part, we configured basic firewall rules for your Azure web... | 0 | 2024-07-17T21:59:22 | https://dev.to/jimiog/configuring-routes-for-azure-firewall-part-4-2p85 | azure, cloud, network, security | **Introduction:**
In the [previous part](https://dev.to/jimiog/securing-your-azure-web-application-with-azure-firewall-part-3-2j2d), we configured basic firewall rules for your Azure web application. Now, we'll establish routes to ensure all outbound traffic from your application subnets is directed through the Azure Firewall for enhanced security.
### Recording Firewall IP Addresses
1. In the Azure portal search bar, type **Firewall** and select **Firewall**.
2. Choose your application firewall.
3. On the firewall's overview page, locate the **Private IP address**. Copy and paste this address into a secure notepad for later use.
### Creating a Route Table
1. Search for **Route Tables** in the portal and click **+ Create**.
2. Configure a name for your route table (e.g., **App-Vnet-Route-Table**).
3. Click **Review + create** and then **Create** to deploy the route table.
### Associating Subnets with the Route Table
1. Navigate to the newly created route table and click on **Go to resource**.
2. Under **Settings**, select **Subnets** and then click **Associate**.
3. In the association window, choose your application virtual network and select both the **frontend subnet** and **backend subnet**. Click **OK** to associate them.
### Creating a Route for Firewall Traffic
1. Within the route table settings, navigate to **Routes** and click **Add**.
2. Configure the route details as follows:
* Name: Choose a descriptive name (e.g., **Route-to-Firewall**)
* Destination type: Select **IP addresses**
* Destination prefix: Enter **0.0.0.0/0** (this captures all outbound traffic)
* Next hop type: Choose **Virtual appliance**
* Next hop IP address: Paste the private IP address of your Azure Firewall copied earlier.
3. Click **Add** to create the route.
**Conclusion**
By associating the route table with your application virtual network subnets and creating a route with the firewall's private IP as the next hop, we've ensured that all outbound traffic from your application will be directed through the Azure Firewall for inspection and filtering. This strengthens the overall security posture of your web application. | jimiog |
1,922,777 | Detecting Browser DevTools: A Guide to `devtools-detect` | Detecting Browser DevTools: A Guide to devtools-detect Web developers often need to know... | 0 | 2024-07-14T01:22:23 | https://dev.to/sh20raj/detecting-browser-devtools-a-guide-to-devtools-detect-4kgd | javascript, webdev, beginners, devtoolsdetect | # Detecting Browser DevTools: A Guide to `devtools-detect`
Web developers often need to know when users are inspecting their applications using browser DevTools. This capability can be crucial for various reasons, such as preventing data tampering, enhancing security, or simply understanding user behavior. The `devtools-detect` library by Sindre Sorhus provides a straightforward solution for detecting when DevTools are open in the user's browser.
In this article, we'll explore how to integrate and use `devtools-detect` in your web projects.
## What is `devtools-detect`?
`devtools-detect` is a JavaScript library that allows developers to detect when the browser's Developer Tools are open. It provides a simple API to check the DevTools state and listen for changes.
## Features
- Detects if DevTools are open.
- Listens for changes in the DevTools state.
- Supports major browsers.
## Getting Started
To start using `devtools-detect`, you need to include the library in your project. You can install it using npm or include it directly in your HTML file.
### Installation
You can install `devtools-detect` via npm:
```bash
npm install devtools-detect
```
Or include it directly in your HTML:
```html
<script src="https://unpkg.com/devtools-detect"></script>
```
### Basic Usage
Once you have included the library, you can use it to detect the DevTools state.
#### Example
```javascript
import devtools from 'devtools-detect';
if (devtools.isOpen) {
console.log('DevTools are open');
} else {
console.log('DevTools are closed');
}
```
### Listening for Changes
`devtools-detect` also allows you to listen for changes in the DevTools state. This can be useful if you want to perform actions whenever the DevTools are opened or closed.
#### Example
```javascript
import devtools from 'devtools-detect';
window.addEventListener('devtoolschange', event => {
if (event.detail.isOpen) {
console.log('DevTools are open');
} else {
console.log('DevTools are closed');
}
});
```
### Complete Example
Here is a complete example demonstrating both detection and listening for changes:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>DevTools Detect Example</title>
<script src="https://unpkg.com/devtools-detect"></script>
<script>
document.addEventListener('DOMContentLoaded', () => {
if (devtools.isOpen) {
console.log('DevTools are open');
} else {
console.log('DevTools are closed');
}
window.addEventListener('devtoolschange', event => {
if (event.detail.isOpen) {
console.log('DevTools are open');
} else {
console.log('DevTools are closed');
}
});
});
</script>
</head>
<body>
<h1>DevTools Detect Example</h1>
<p>Open and close the browser's Developer Tools to see the console messages.</p>
</body>
</html>
```
## Use Cases
### Security
Detecting DevTools can help in securing your application. You can log such events, trigger alerts, or disable certain features when DevTools are open to prevent tampering or reverse engineering.
### User Behavior Analysis
Understanding when users open DevTools can provide insights into their behavior. For example, frequent DevTools usage might indicate that users are facing issues or trying to understand the underlying code.
### Feature Restrictions
You might want to restrict certain features when DevTools are open to prevent misuse. For instance, disabling specific functionalities that are prone to tampering when DevTools are detected.
## Conclusion
`devtools-detect` is a powerful yet simple tool for detecting when the browser's Developer Tools are open. Whether you're looking to enhance security, analyze user behavior, or restrict features, this library can be a valuable addition to your web development toolkit.
For more details and advanced usage, visit the [devtools-detect GitHub repository](https://github.com/sindresorhus/devtools-detect).
Feel free to experiment with the library and integrate it into your projects to take control of DevTools detection! | sh20raj |
1,922,778 | Enabling Internal DNS Resolution for Secure Workloads (final) | Introduction: In the final part of this series, we'll configure internal DNS resolution for your... | 0 | 2024-07-17T22:00:35 | https://dev.to/jimiog/enabling-internal-dns-resolution-for-secure-workloads-final-2ol3 | azure, cloud, dns, microsoft | **Introduction:**
In the final part of this [series](https://dev.to/jimiog/configuring-routes-for-azure-firewall-part-4-2p85), we'll configure internal DNS resolution for your Azure virtual network. This allows workloads within the network to resolve domain names privately, enhancing security and overall performance.
### Creating a Private DNS Zone
1. In the Azure portal search bar, type **Private DNS zones** and select it.
2. Click **+ Create**.
3. Configure the DNS zone settings as follows:
* Resource group: Select the resource group created for your application resources in the previous guides.
* Name: Choose a descriptive name for your DNS zone (e.g., **app-vnet-dns**).
* Location: Select the same region as your application virtual network for optimal performance.
4. Click **Review + create** and then **Create** to deploy the private DNS zone.
### Linking the Virtual Network
1. Once the DNS zone is created, click on **Go to resource**.
2. Under **DNS management**, navigate to **Virtual Network Links** and click **Add**.
3. Configure the virtual network link as follows:
* Name: Choose a clear name for the link (e.g., **app-vnet-link**).
* Virtual Network: Select the application virtual network you created earlier.
* Enable auto-registration: Leave this enabled to automatically register resources within the virtual network with the DNS zone.
4. Click **Create** to establish the link.
### Creating a DNS Record Set
1. Within the private DNS zone, navigate to **DNS management** and select **Record sets**.
2. Click **Add** to create a new record set.
3. Configure the record set details:
* Name: Enter the hostname you want to resolve internally (e.g., **webserver**).
* Type: Choose **A** (record for hostnames).
* TTL: Set the Time To Live (TTL) to a low value (e.g., 1 minute) for quicker updates.
* Resource: Enter the private IP address of your web server.
4. Review the details and click **Add** to add the record set.
**Verification:**
With these steps, you've successfully configured a private DNS zone and linked it to your virtual network. Workloads within the network can now resolve domain names like "webserver" internally using the private IP address, promoting secure communication within the virtualized environment.
**Additional Notes:**
* Remember to create A records for all services you want to resolve internally within your virtual network.
* You can manage DNS records and settings within the private DNS zone for further customization.
**Conclusion:**
This series has guided you through the comprehensive process of securing your Azure web application. We began by creating virtual networks and subnets, establishing logical boundaries for your resources. We then implemented peering links to connect these virtual networks for controlled communication. Next, we configured Network Security Groups (NSGs) and Azure Firewall to meticulously control inbound and outbound traffic, safeguarding your application from external threats. Finally, we enabled internal DNS resolution, allowing workloads within the virtual network to communicate securely using private IP addresses and hostnames. By following these steps, you've built a robust security foundation for your Azure web application, ensuring its smooth operation and protection. | jimiog |
1,922,780 | Topics I Post About | Classic Software - Software Technology like I learned in... | 0 | 2024-07-14T01:39:44 | https://dev.to/theholyspirit/topics-i-post-about-pek | todayilearned, todayisearched, devjournal, webdev | **Classic Software - Software Technology like I learned in 2009**
https://dev.to/theholyspirit/display-a-text-file-in-a-browser-5202
https://dev.to/theholyspirit/manifestjson-13i
**Human Software - Metaphysical Technology Which Runs The Simulation**
https://dev.to/theholyspirit/the-quantification-of-perception-3iff
https://dev.to/theholyspirit/written-formatting-is-a-technology-36pb
https://dev.to/theholyspirit/a-product-engineering-understanding-332k
https://dev.to/theholyspirit/i-make-techno-1llb
https://dev.to/theholyspirit/conference-annoucement-template-18k4
**Technology Startup - Going Pro With Software And Business**
https://dev.to/theholyspirit/business-development-33i
https://dev.to/theholyspirit/founders-academy-day-1-pa4
https://dev.to/theholyspirit/founders-academy-workbook-3370
https://dev.to/theholyspirit/just-got-back-1kln
https://dev.to/theholyspirit/immediately-i-am-hiring-an-apprentice-379p
| theholyspirit |
1,922,803 | Elevator Pitch | Elevator Pitch Elevator pitch secrets The average non task-oriented attention span of a human being... | 0 | 2024-07-14T02:08:51 | https://dev.to/theholyspirit/elevator-pitch-201j | **Elevator Pitch**
Elevator pitch secrets
The average non task-oriented attention span of a human being is about 8 seconds.
So how to 8 second elevator pitch
1-2 sentences that description
1. The audience the solution helps
2. The problems solved
3. The benefit your customers receive
**Primary objective**
Your elevator pitch only needs to accomplish one thing
Generate e out interest to get asked any question that lets you expand a little further
A good elevator pitch (one that generates a questions) might lead to a question
Another definition: who i help + why should someone care
Another definition of EP
We help (customer) (solve problem) (for benefit).
Answer the “so what”
Make a bold claim or prediction (the more tantalizing the better)
Quantify, where possible
You objective is to generate enough internet to get any question
Strategy is to start with the end answer of “So what” and allow further questions to draw out the details.
“Doggie drone is an innovative dog-walking solution for the elderly. Our drones have completed 20,000 dog walks for more than 250 elderly and deserving dog owners”
Super mode: Only have 5-6 words. then can add 5-6 more.
Our drone walks your dog.
Our drone walks your dog so you don’t have to.
Then test with 20 people that dont know much about your venture.
1. Ask them to react with the first question that comes to mine (do not answer right away)
2. Ask them to tall you what they think your company does.
Might end up with multple versions segmented, e.g., investors vs prospects. Market A vs market b, product 1 versus product 2
**Evangelize**
All co-founders and employees must memorize the elevator pitch (at least the first sentence). At random times, ask an employee what your elevator pitch is.
“What’s our elevator pitch?”
**Homework:** write out elevator pitch and take it for a test drive
---
These notes are inspired by Founders Academy. I've added some of my own understandings, and the gatherings of other participants.
Founder's Academy was a 3 day workshop for founders at any stage in the journey. It was hosted by Capital Factory and Gordon Daugherty July 2024.
[Archive of Founders Academy](https://dev.to/theholyspirit/just-got-back-1kln) | theholyspirit | |
1,922,804 | Getting Started with Azure Bicep | Azure Bicep is a domain-specific language (DSL) designed for deploying and managing Azure resources.... | 0 | 2024-07-14T02:09:49 | https://blog.raulnq.com/getting-started-with-azure-bicep | azure, bicep | Azure Bicep is a domain-specific language (DSL) designed for deploying and managing Azure resources. It offers several advantages, including a more concise syntax compared to [ARM templates](https://learn.microsoft.com/en-us/azure/azure-resource-manager/templates/overview), improved readability, enhanced maintainability, and a gentler learning curve.
## How Does it Work?
A Bicep file is automatically converted into an ARM template (JSON) when a deployment is submitted to Azure.
## Pre-requisites
* Ensure you have an [Azure Account](https://azure.microsoft.com/en-us/free/)
* Install [Azure CLI](https://docs.microsoft.com/en-us/cli/azure/install-azure-cli)
* Install [Bicep CLI](https://learn.microsoft.com/es-es/azure/azure-resource-manager/bicep/install#azure-cli) (`az bicep install`)
* Check out our [Getting Started with ARM Templates](https://blog.raulnq.com/getting-started-with-arm-templates) guide if you're unfamiliar with the basics of ARM templates.
## Resources
The syntax for defining a [resource](https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/resource-declaration?tabs=azure-powershell) is:
```json
resource <symbolic-name> '<full-type-name>@<api-version>' = {
<resource-properties>
}
```
To define a resource, use the `resource` keyword followed by:
* `<symbolic-name>`: The symbolic name isn't the same as the resource name, and it is used to reference the resource in other sections of your Bicep file.
* `<full-type-name>` and `<api-version>`: For the available resource types and versions, see [Bicep resource reference](https://learn.microsoft.com/en-us/azure/templates/).
* `<resource-properties>`: `name` and `location` are properties that can be found in nearly every resource. After setting those values, we need to set the properties that are specific to the resource type we are using.
Create a `main.bicep` file with the following content:
```json
resource storageAccount 'Microsoft.Storage/storageAccounts@2022-09-01' = {
name: 'myuniquestorage001'
location: resourceGroup().location
kind: 'StorageV2'
sku: {
name: 'Standard_GRS'
}
}
```
Execute the command `az group create -l eastus -n MyResourceGroup` to create the resource group where our resources will be stored. Afterward, run the following command:
```powershell
az deployment group create --resource-group MyResourceGroup --template-file .\main.bicep
```
## Parameters
The syntax for defining a [parameter](https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/parameters) is:
```json
@<decorator-name>
param <parameter-name> <parameter-data-type> = <default-value>
```
To define a parameter, use the `param` keyword followed by:
* `<parameter-name>`: The name of the parameter. It cannot have the same name as a variable, resource, output, or another parameter in the same scope.
* `<parameter-type>`: We can find the complete list of data types [here](https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/data-types).
* `<default-value>`: The default value is used when a value is not supplied during deployment.
* `<decorator-name>`: Parameters use decorators for constraints or metadata. The list of decorators can be found [here](https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/parameters#decorators).
Update the `main.bicep` file with the following content:
```json
@description('storage account name')
param storageAccountName string = 'myuniquestorage001'
@description('storage account location')
param location string = resourceGroup().location
resource storageAccount 'Microsoft.Storage/storageAccounts@2022-09-01' = {
name: storageAccountName
location: location
kind: 'StorageV2'
sku: {
name: 'Standard_GRS'
}
}
```
To pass inline parameters, you can execute a command like this:
```powershell
az deployment group create --resource-group MyResourceGroup --template-file .\main.bicep --parameters storageAccountName='myuniquestorage002'
```
## Variables
The syntax for defining a [variable](https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/variables) is:
```powershell
var <variable-name> = <variable-value>
```
To define a variable, use the `var` keyword followed by:
* `<variable-name>`: A variable cannot share the same name as a parameter, module, or resource.
* `<variable-value>`: Note that we do not need to specify a data type for the variable. The type is inferred from the value provided.
Update the `main.bicep` file using the following content:
```json
@description('storage account prefix')
param storageAccountPrefix string
@description('storage account location')
param location string = resourceGroup().location
var storageAccountName = '${toLower(storageAccountPrefix)}${uniqueString(resourceGroup().id)}'
resource storageAccount 'Microsoft.Storage/storageAccounts@2022-09-01' = {
name: storageAccountName
location: location
kind: 'StorageV2'
sku: {
name: 'Standard_GRS'
}
}
```
Execute the following command:
```powershell
az deployment group create --resource-group MyResourceGroup --template-file .\main.bicep --parameters storageAccountPrefix='mystorage'
```
## Outputs
The syntax for defining an [output](https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/outputs?tabs=azure-powershell) is:
```json
output <output-name> <output-data-type> = <output-value>
```
To define a variable, use the `output` keyword followed by:
* `<output-name>`: An output can have the same name as a parameter, variable, module, or resource.
* `<output-data-type>`: Can use the same data types of the parameters.
* `<output-value>`: The value we want to expose.
Update the `main.bicep` file with the content provided below:
```json
@description('storage account prefix')
param storageAccountPrefix string
@description('storage account location')
param location string = resourceGroup().location
var storageAccountName = '${toLower(storageAccountPrefix)}${uniqueString(resourceGroup().id)}'
resource storageAccount 'Microsoft.Storage/storageAccounts@2022-09-01' = {
name: storageAccountName
location: location
kind: 'StorageV2'
sku: {
name: 'Standard_GRS'
}
}
output endpoints object = storageAccount.properties.primaryEndpoints
```
Execute the following command to deploy the resource and filter the output ([How to query Azure CLI command output using a JMESPath query](https://learn.microsoft.com/en-us/cli/azure/query-azure-cli?tabs=concepts%2Cbash)):
```powershell
az deployment group create --resource-group MyResourceGroup --template-file .\main.bicep --parameters storageAccountPrefix='mystorage' --query "properties.outputs"
```
In conclusion, by understanding the core concepts of resources, parameters, variables, and outputs, you can effectively leverage Bicep to streamline your Azure deployments and make your infrastructure as code more accessible and maintainable. We encourage you to check the official documentation [here](https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/) to explore the full potential of this tool. Thanks, and happy coding. | raulnq |
1,922,806 | I am developing a Text Input Component based on Skia and Canvas | visit github TextMagic is the next generation text component. Unlike native input and textarea... | 0 | 2024-07-14T02:25:12 | https://dev.to/gezilinll/i-am-developing-a-text-input-component-based-on-skia-and-canvas-1407 | webdev, javascript, programming, opensource | [visit github
](https://github.com/gezilinll/TextMagic)
TextMagic is the next generation text component. Unlike native input and textarea components, it supports richer text effects and typesetting capabilities. By controlling text layout autonomously, it ensures consistent text display across different platforms and browsers. TextMagic follows a modular design approach, offering both an integrated component(@text-magic) for seamless integration and standalone components for specific needs: @text-magic/input for text input and @text-magic/renderer for text typesetting and rendering.
If anyone shares an interest in text or related fields, I welcome discussion and collaboration. I'm also in the process of learning in this area and would appreciate more feedback and assistance. | gezilinll |
1,922,807 | Business Development | Business Development Can mean different things Strategic Partnerships Strategic partnerships are you... | 0 | 2024-07-14T02:30:25 | https://dev.to/theholyspirit/business-development-33i | startup, technology, webdev, business | **Business Development**
Can mean different things
**Strategic Partnerships**
Strategic partnerships are you partnering with a big player in the industry for mutually beneficial business agreement. As an exercise, make a list of the top 25 market revenue leaders. A Strategic Partner is on that list.
They think they are big and you are small. The newer business must think on the level of the big player, a different context of significance. So keep in mind their answer to the question "What is this little company doing for me?"
I must answer “What can I do for them?”
**How to provide value to Strategic Partners**
Provide revenue leverage, i.e. trigger meaningful revenue generation for them.
**Handling Exclusivity Requests**
A Strategic Partner may request you only partner with them exclusively.
Measure the business impact of agreeing with their agreement. If maintaining open accessibility favors the market, engage in shaping of the exclusivity request.
* Ensure they will announce the partnership publically
* Ensure they engage in co-marketing to generate awareness
* Detail how many HR (program managers) they will be giving for partnership
* Tie the agreement to business results -- get specific
* Limit the time frame of agreement
* Limit exclusivity to specific list of competitors
* Limit to specific geography
* Limit to specific applicaiton use case
* Consider reversing the table, and ensure exclusivity in return
**White Dabel Deal**
In a white label deal, the partner uses your product, but labels it as their own brand. Or potentially uses your component within their larger, named product. Also termed “Licensing.” They should pay R&D.
**Letter of Intent**
A Letter of Intent (LOI) is a descriptive contract of agreement between two parties, e.g. one's self and strategic partner.
A letter of intent is used to set a foundation that is later used by the lawyers to paper up details. It just states the decisions and intents of the business people, to be sent with lawyers as statements of representation.
LOIs are non-binding. Maximize the "credit" one is worth by including the motivations for its existence, expected value for the customer, and having it signed by an executive. Triggered outcomes, if this then that
Bring LOIs Letters of Intent to investors
Anecdote 1 startup has 15 LOIs worth 150M a year
---
These notes are inspired by Founders Academy. I've added some of my own understandings, and the gatherings of other participants.
Founder's Academy was a 3 day workshop for founders at any stage in the journey. It was hosted by Capital Factory and Gordon Daugherty July 2024.
[Archive of Founders Academy](https://dev.to/theholyspirit/just-got-back-1kln) | theholyspirit |
1,922,808 | Harnessing NgRx for Effortless Angular State Management | Managing state in complex Angular applications can be a daunting task, especially as the application... | 0 | 2024-07-14T02:39:19 | https://devtoys.io/2024/07/13/harnessing-ngrx-for-effortless-angular-state-management/ | angular, tutorial, devtoys | ---
canonical_url: https://devtoys.io/2024/07/13/harnessing-ngrx-for-effortless-angular-state-management/
---
Managing state in complex Angular applications can be a daunting task, especially as the application grows and the interdependencies between different parts of the application become more intricate. NgRx, a powerful state management library inspired by Redux, offers a robust solution to this challenge. In this blog post, we’ll delve deep into the key concepts of NgRx, how it can streamline state management, and best practices for integrating NgRx into your Angular projects. We’ll also provide a practical tutorial to help you get started with NgRx in your own Angular applications.
---
## What is NgRx?
NgRx is a set of reactive libraries for Angular, built around the principles of reactive programming using RxJS. It provides a unidirectional data flow, which helps in maintaining a single source of truth for the application’s state. This makes it easier to manage and predict state changes, resulting in more maintainable and testable code.
---
## Key Concepts of NgRx
### Store
The store is the central repository where the state of the application is stored. It holds the state as a single immutable object. This centralization of state makes it easier to debug and understand the flow of data in your application.
---
### Actions
Actions are payloads of information that send data from your application to your store. They describe what should be done, but not how. Actions are dispatched from components and services to trigger state changes.
```typescript
import { createAction, props } from '@ngrx/store';
export const loadItems = createAction('[Item List] Load Items');
export const loadItemsSuccess = createAction(
'[Item List] Load Items Success',
props<{ items: Item[] }>()
);
```
---
### Reducers
Reducers are pure functions that take the current state and an action to return a new state. They specify how the application’s state changes in response to actions. Reducers should be kept simple and free of side effects.
```typescript
import { createReducer, on } from '@ngrx/store';
import { loadItemsSuccess } from './item.actions';
import { State, initialState } from './item.model';
const _itemReducer = createReducer(
initialState,
on(loadItemsSuccess, (state, { items }) => ({ ...state, items }))
);
export function itemReducer(state: State | undefined, action: Action) {
return _itemReducer(state, action);
}
```
---
### Selectors
Selectors are functions that extract slices of state from the store. They are used to obtain pieces of state and compute derived states. Selectors help in decoupling component logic from the store structure.
```typescript
import { createSelector, createFeatureSelector } from '@ngrx/store';
export const selectItemState = createFeatureSelector<State>('items');
export const selectAllItems = createSelector(
selectItemState,
(state: State) => state.items
);
```
---
### Effects
Effects handle side effects like asynchronous operations. They listen for actions dispatched to the store and perform tasks like HTTP requests or other operations, then dispatch new actions. Effects are a key part of NgRx that help keep reducers pure and side-effect-free.
```typescript
import { Injectable } from '@angular/core';
import { Actions, createEffect, ofType } from '@ngrx/effects';
import { loadItems, loadItemsSuccess } from './item.actions';
import { map, mergeMap } from 'rxjs/operators';
import { ItemService } from './item.service';
@Injectable()
export class ItemEffects {
loadItems$ = createEffect(() =>
this.actions$.pipe(
ofType(loadItems),
mergeMap(() => this.itemService.getAll().pipe(
map((items) => loadItemsSuccess({ items }))
))
)
);
constructor(
private actions$: Actions,
private itemService: ItemService
) {}
}
```
## 👀 For a hands-on tutorial please visit [DevToys.io - Harnessing NgRx For Effortless Angular State Management](https://devtoys.io/2024/07/13/harnessing-ngrx-for-effortless-angular-state-management/) for the full article! 🔥
---
## [🤓 Looking for more resources to become an expert in Angular stack? This is a MUST read!🔥](https://amzn.to/4cEgt6c)
[](https://amzn.to/4cEgt6c)
| 3a5abi |
1,922,809 | Triangle to pixel | Triangle is a three sided polygon, one of the most basic geometric shapes. It is a convex shape.... | 0 | 2024-07-14T02:44:01 | https://dev.to/x64x2/triangle-to-pixel-3ga0 | programming, learning, computerscience, software |
Triangle is a three sided polygon, one of the most basic geometric shapes. It is a convex shape. Furthermore it is a 2-simplex, i.e. the simplest ["shape composed of sides"]polytope in 2 dimensions. Triangles are very important, they for example help us to compute distances or define functions like sine and cosine.
In my favorite book Flatland triangles represent the lowest class of men with isoscele triangles being the lowest as they are most similar to women who are just straight lines
Triangle consists of three vertices (usually labeled *A*, *B* and *C*), three sides (usually labeled *a*, *b* and *c* according to the side's opposing vertex) and three angles (usually labeled *alpha*, *beta* and *gamma* according to the closest vertex):
```
B B
. .
/ \ c = /|
c / \ a hypotenuse / | a
/ \ / |
/_______\ /___|
A b C A b C
triangle right triangle
```
**Right triangle**, a triangle with one angle equal to 90 degrees pi / 2 radians, is an especially important type of triangle. Right triangles are used to define trigonometric functions, such as sine, cosine and tangent, as ratios of side lengths as a function of the triangle angle. For example in a right triangle (as drawn above) it holds that *sin(alpha) = a / c*.
**Similar triangles** are triangles that "have the same shape" (but may be of different sizes, positions and rotations). Two triangles are similar if the lengths of corresponding sides have the same ratios, or, equally, if they have the same inside angles. E.g. a triangle with side lengths 1, 2 and 3 is similar to a triangle with side lengths 2, 4 and 6. This fact is very useful in some geometric computations as it can help us determine unknown side lengths.
**Equilateral triangle** is a triangle whose sides have the same length, which means all its angles are also equal (60 degrees, pi / 3 radians). Equilateral triangles are of course all similar to each other. An **isoscele triangle** is a triangle with two sides of the same length. We can also distinguish acute and obtuse triangles (obtuse having one angle greater than 90 degrees).
In a triangle there exist two important types of helper line segments: **median** and **altitude**. Median goes from a triangle's vertex to the opposite side's center. Altitude goes from a vertex to the opposite side in a perpendicular direction to that side. Each triangle has three medians and three altitudes.
Some basic facts, features and equations regarding triangles are following beware: many of them only hold in Euclidean geometry
- **Triangle angles add up to 180 degrees** pi radians . This can be used to determine unknown side angles.
- Center of weight: average the three coordinates, or take the intersection of the triangle's medians.
- **area**:
- general triangle: *a * altitude(a) / 2*
- right triangle: *a * b / 2*
- **Pythagorean theorem**: For the lengths of the sides of a RIGHT triangle it always holds that *a^2 + b^2 = c^2*. This is extremely important and can be used to determine unknown side lengths of right triangles.
- **Thales's theorem**: if points *A*, *B* and *C* lie on a circle, then they form a right triangle with hypotenuse equal to the circle diameter (and the center of the circle lying in the middle of the hypotenuse).
- **Triangle inequality**: Sum of any two side lengths can't be greater than the length of the third side, i.e. *a + b <= c*. That means that e.g. a triangle with side lengths 1, 2 and 4 can't exist because 1 + 4 > 2. If one side of a triangle is exactly the sum of the other two, the triangle is called **degenerate**, its vertices lie on the same line and it is completely "squashed".
- **Law of sines**: *a / sin(alpha) = b / sin(beta) = c / sin(gamma)*
- **Law of cosines**: Generalization of Pythagorean theorem: *a^2 = b^2 + c^2 - 2 * b * c * cos(alpha)*.
- Triangle tessellation is one of only three possible regular plane tilings (the other two being square and hexagon)
- Every triangle has two special associated circle:
- **incircle**: circle inside the triangle which touches each of its sides at one point, its center (incenter) lies on the intersection of all angle bisectors.
- **circumcircle**: circle outside the triangle which touches each of its vertices, its center (circumcenter) lies on the perpendicular bisectors of each side.
- Triangle vertices always line in a single plane (unlike other polygons).
In non Euclidean geometries triangles behave weird, for example we can draw a triangle with three right angles on a surface of a sphere (i.e. its angles add to more than 180 degrees). This fact can be exploited by inhabitants of a space (e.g. our universe) to find out if they in fact live in a non Euclidean space (and possibly determine the space's exact curvature).
Constructing triangles: if we are to construct (draw) triangles with only partial knowledge of its parameters, we may exploit the above mentioned attributes to determine things we don't explicitly know. For example if we're told to construct a triangle with knowing only the lengths of the sides but not the angles, we can determine an angle of one side using the law of cosines at which point we can already draw all three vertices and just connect them. In other words just use your brain.
Triangles also play a big role e.g. in realtime 3D rendering where they are used as a basic building block of 3D models, i.e. we approximmate more complex shapes with triangles because triangles are simple (thanks to being a simplex) and so have nice properties such as always lying in a plane so we cannot ever see both its front and back side at once. They are relatively easy to draw (rasterize) so once we can draw triangles, we can also draw complex shapes composed of triangles. In general triangles, just as other simple shapes, can be used to approximate measures and attributes -- such as area or center of mass -- of more complex shapes, even outside computer graphics. For example to determine an area of some complex shape we approximate it by triangles, then sum up the areas of the triangles.
**Barycentric coordinates** provide a coordinate system that can address specific points inside any triangle -- these are used e.g. in computer graphics for texturing. The coordinates are three numbers that always add up to 1, e.g. [0.25, 0.25, 0.5]. The coordinates can be though of as ratios of areas of the three subtriangles the point creates. Points inside the triangle have all three numbers positive. E.g. the coordinates of the vertices *A*, *B* and *C* are [1, 0, 0], [0, 1, 0] and [0, 0, 1], and the coordinates of the triangle center are [1/3, 1/3, 1/3].
**Winding** of the triangle says whether the ordered vertices of the triangle go clockwise or counterclockwise. I.e. winding says whether if we were to go in the direction *A -> B -> C* we'd be going clockwise or counterclockwise around the triangle center. This is important e.g. for backface culling in computer graphics (determining which side of a triangle in 3D we are looking at). Determining of the winding of triangle can be derived from the sign of the z-component of the cross product of the triangle's sides. For the lazy: compute *w = (y1 - y0) * (x2 - x1) - (x1 - x0) * (y2 - y1)*, if *w > 0* the points go clockwise, if *w < 0* the points go counterclockwise, otherwise (*w = 0*) the points lie on a line.
Sierpinski triangle is a fractal related to triangles.
**Testing if point lies inside 2D triangle**: one way to do this is following. For each triangle side test whether the winding of the tested point and the side is the same as the winding of whole triangle -- if this doesn't hold for any side, the point is outside the triangle, otherwise it is inside. In order words for each side we are testing whether the tested point and the remaining triangle point are on the same side (in the same half plane). Here is a [C](c.md) code:
```
int pointIsInTriangle(int px, int py, int tp[6])
{
// winding of the whole triangle:
int w = (tp[3] - tp[1]) * (tp[4] - tp[2]) - (tp[2] - tp[0]) * (tp[5] - tp[3]);
int sign = w > 0 ? 1 : (w < 0 ? -1 : 0);
for (int i = 0; i < 3; ++i) // test winding of point with each side
{
int i1 = 2 * i;
int i2 = i1 != 4 ? i1 + 2 : 0;
int w2 = (tp[i1 + 1] - py) * (tp[i2] - tp[i1]) - (tp[i1] - px) * (tp[i2 + 1] - tp[i1 + 1]);
int sign2 = w2 > 0 ? 1 : (w2 < 0 ? -1 : 0);
if (sign * sign2 == -1) // includes edges
//if (sign != sign2) // excludes edges
return 0;
}
return 1;
}
``` | x64x2 |
1,922,810 | AI Transforming Real Estate | Introduction The integration of Artificial Intelligence (AI) into various sectors... | 27,673 | 2024-07-14T02:45:11 | https://dev.to/rapidinnovation/ai-transforming-real-estate-31l9 | ## Introduction
The integration of Artificial Intelligence (AI) into various sectors has
revolutionized traditional practices, and the real estate industry is no
exception. AI's influence spans across multiple aspects of real estate, from
property search engines to transaction processes, significantly altering how
agents, buyers, and sellers interact. This technology not only streamlines
operations but also enhances customer experience and decision-making
processes. As we delve deeper into the specifics, it becomes clear that AI is
not just a tool but a transformative force reshaping the real estate
landscape.
## The Impact of AI on the Real Estate Industry
AI's impact on the real estate industry is profound and multifaceted,
influencing everything from property management to investment strategies. By
automating routine tasks, providing deeper insights into market trends, and
enhancing interaction with customers, AI is setting new standards in the
industry.
### Enhancing Property Search Engines
One of the most noticeable impacts of AI in real estate is the enhancement of
property search engines. Traditional search methods were often cumbersome,
requiring potential buyers to sift through extensive listings to find their
desired property. AI has revolutionized this process by incorporating
sophisticated algorithms that learn from user preferences and behavior,
thereby delivering more accurate and personalized search results.
### Automating Administrative Tasks
In the real estate sector, administrative tasks such as document handling,
lease management, and client inquiries can be time-consuming and prone to
human error. Automating these tasks with AI technologies can significantly
enhance efficiency and accuracy. AI-powered tools are capable of processing
large volumes of documents, extracting key information, and even ensuring
compliance with local regulations.
### Predictive Analytics in Real Estate
Predictive analytics in real estate utilizes machine learning algorithms and
big data to forecast trends, property values, and investment risks. This
technology can analyze vast amounts of data from various sources, including
market trends, demographic shifts, and economic indicators, to predict future
market behaviors. For investors and developers, this means more informed
decision-making, optimized investment strategies, and minimized risks.
## Top Companies Leveraging AI in Real Estate
Several leading companies are at the forefront of integrating AI into real
estate, transforming the landscape of the industry. Zillow, for example, uses
AI in various aspects of its operations, from predicting home values with its
Zestimate algorithm to providing virtual tours of properties. Another notable
company, Redfin, leverages AI to recommend properties to users based on their
past searches and preferences, significantly enhancing user experience and
engagement.
## Case Studies
### Case Study 1: Residential Real Estate
In the realm of residential real estate, the transformation brought about by
technological advancements and changing market dynamics is profound. A notable
example is the case of a residential development in Austin, Texas, where a
combination of market analysis tools and customer relationship management
(CRM) systems were used to optimize sales and improve customer satisfaction.
### Case Study 2: Commercial Real Estate
The commercial real estate sector often deals with larger stakes and, as such,
the integration of advanced technologies and strategic planning plays a
crucial role in its development. A compelling case study can be observed in
the redevelopment of a commercial district in downtown Chicago.
### Case Study 3: International Markets
The impact of AI in real estate is becoming increasingly significant across
international markets, with various countries adopting technology to enhance
property-related transactions and management. For instance, in the United Arab
Emirates, AI is being integrated into the real estate sector to predict market
trends and customer preferences, which helps in making informed investment
decisions.
## Challenges and Limitations of AI in Real Estate
### Data Privacy and Security
One of the primary challenges in the implementation of AI in real estate is
ensuring data privacy and security. Real estate companies collect vast amounts
of data from clients, including personal and financial information, which are
susceptible to breaches if not properly protected.
### High Initial Investment Costs
The implementation of new technologies often comes with high initial
investment costs, which can be a significant barrier for many businesses,
especially small and medium-sized enterprises (SMEs). These costs include not
only the purchase of new technology but also the integration and training
required to make effective use of it.
### Resistance to Technological Adoption
Resistance to technological adoption is a common challenge faced by
organizations across various sectors. This resistance can stem from a variety
of sources including organizational inertia, fear of change among employees,
and a lack of understanding about the benefits of new technology.
## Future Trends and Predictions
The future of technology adoption in business is poised for dynamic changes,
with several trends likely to dominate the landscape. Firstly, artificial
intelligence (AI) and machine learning will continue to be integral in
automating business processes and providing deeper insights into operations
and customer behaviors.
### Integration of AI with Other Technologies
The integration of Artificial Intelligence (AI) with other technologies is
revolutionizing various industries by creating more efficient, innovative, and
intelligent solutions. AI's ability to analyze large volumes of data and learn
from outcomes enables it to enhance the capabilities of other technologies
such as the Internet of Things (IoT), blockchain, and augmented reality (AR).
### Expansion into Emerging Markets
The expansion of businesses into emerging markets is a critical strategy for
growth, especially as these regions exhibit rapid economic development,
increasing digital penetration, and a burgeoning middle class. Companies
leveraging AI have a unique advantage in these markets, as they can utilize
advanced analytics to understand consumer behavior, optimize supply chains,
and enter markets more efficiently.
### Enhanced Customer Experience through AI
AI is significantly enhancing customer experience by personalizing
interactions, improving response times, and ensuring customer satisfaction. AI
technologies like chatbots, recommendation engines, and personalized marketing
are transforming how businesses interact with their customers.
📣📣Drive innovation with intelligent AI and secure blockchain technology! Check
out how we can help your business grow!
[Blockchain Development](https://www.rapidinnovation.io/service-
development/blockchain-app-development-company-in-usa)
[AI Software Development](https://www.rapidinnovation.io/ai-software-
development-company-in-usa)
[Blockchain Development](https://www.rapidinnovation.io/service-
development/blockchain-app-development-company-in-usa) [AI Software
Development](https://www.rapidinnovation.io/ai-software-development-company-
in-usa)
## URLs
* <https://www.rapidinnovation.io/post/ai-in-real-estate-top-companies-revolutionizing-real-estate-with-ai-solutions>
## Hashtags
#Sure!
#Here
#are
#five
#relevant
#hashtags
#for
#the
#text
#provided:
#1.
#AIinRealEstate
#2.
#PropTech
#3.
#PredictiveAnalytics
#4.
#SmartPropertyManagement
#5.
#RealEstateInnovation
#These
#hashtags
#capture
#the
#essence
#of
#the
#integration
#and
#impact
#of
#AI
#in
#the
#real
#estate
#industry,
#covering
#aspects
#like
#property
#search
#engines,
#administrative
#automation,
#predictive
#analytics,
#and
#overall
#technological
#innovation
#in
#the
#sector.
| rapidinnovation | |
1,922,813 | Enhance Code Security with GitHub Actions: Automatically Commenting PRs with Docker Scans | To raise the security awareness of our development team, we've integrated a mechanism into our CI... | 0 | 2024-07-14T03:08:16 | https://dev.to/suzuki0430/enhance-code-security-with-github-actions-automatically-commenting-prs-with-docker-scans-48ap | docker, webdev, devops, security | To raise the security awareness of our development team, we've integrated a mechanism into our CI using GitHub Actions to conduct security scans on Docker images and automatically add those results as comments to pull requests (PRs).
## Overview of the `scan-and-comment` Job
This job automates a series of steps: checking out the code, building the Docker image, performing the security scan, formatting the results, and finally, posting comments to the PR. We use Trivy for scanning vulnerabilities in Docker images. More details about Trivy can be found in a separate article.
[Read about Trivy's vulnerability scanning](https://dev.to/suzuki0430/building-a-secure-cicd-workflow-for-ecs-with-github-actions-gde)
## Details of the `scan-and-comment` Job
Below is the complete CI workflow after adding the `scan-and-comment` job:
```yaml
name: backend-ci
on:
push:
branches:
- main
- staging
- develop
pull_request:
types:
- opened
paths:
- "backend/**"
workflow_dispatch: # For manual execution
jobs:
setup:
# Details omitted for brevity
test:
# Details omitted for brevity
lint:
# Details omitted for brevity
tsc:
# Details omitted for brevity
scan-and-comment:
runs-on: ubuntu-latest
if: github.event_name == 'pull_request' && github.event.action == 'opened'
steps:
- name: Checkout code
uses: actions/checkout@v4
- name: Build Docker Image
run: docker build --build-arg ENV=prod -t local-image:latest -f ./backend/Dockerfile.ecs ./backend
- name: Scan image with Trivy
uses: aquasecurity/trivy-action@0.24.0
with:
image-ref: local-image:latest
format: "table"
severity: "CRITICAL,HIGH"
output: trivy-result.txt
- name: Check Trivy result file
run: cat trivy-result.txt
- name: Format Trivy Scan Result
run: |
if [ -s trivy-result.txt ]; then
echo -e "## Vulnerability Scan Results\n<details><summary>Details</summary>\n\n\`\`\`\n$(cat trivy-result.txt)\n\`\`\`\n</details>" > formatted-trivy-result.md
else
echo -e "## Vulnerability Scan Results\nNo vulnerabilities were detected." > formatted-trivy-result.md
fi
- name: Comment PR with Trivy scan results
uses: marocchino/sticky-pull-request-comment@v2
with:
path: formatted-trivy-result.md
- name: Clean up Trivy result file
run: rm -f trivy-result.txt formatted-trivy-result.md
```
### 1. Code Checkout
This job is executed only when a PR is newly created (`if: github.event_name == 'pull_request' && github.event.action == 'opened'`), ensuring that it does not trigger on syncs or reopens.
```yaml
scan-and-comment:
runs-on: ubuntu-latest
if: github.event_name == 'pull_request' && github.event.action == 'opened'
steps:
- name: Checkout code
uses: actions/checkout@v4
```
### 2. Docker Image Build
The Docker image is built using the same settings as the production environment, enhancing the precision of the security scans.
```yaml
- name: Build Docker Image
run: docker build --build-arg ENV=prod -t local-image:latest -f ./backend/Dockerfile.ecs ./backend
```
Below is the `Dockerfile` used for the build. It's configured for production builds, specifying the `ENV=prod` parameter to improve security scan accuracy.
```Dockerfile
FROM node:20.15.0 AS builder
WORKDIR /app
COPY package*.json ./
COPY yarn.lock ./
# Install dependencies ignoring Husky
# Do not use production mode here for yarn build
RUN yarn install --frozen-lockfile --ignore-scripts
COPY . .
RUN yarn build
ARG ENV
# If staging or production environment, remove node_modules and reinstall in production mode
RUN if [ "$ENV" = "prod" ] || [ "$ENV" = "stg" ]; then \
rm -rf node_modules && yarn install --frozen-lockfile --ignore-scripts --production; \
fi
FROM node:20.15.0-slim
WORKDIR /app
COPY --from=builder /app/dist ./dist
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package.json ./package.json
EXPOSE 8080
CMD ["node", "dist/main"]
```
### 3. Image Scan with Trivy
Trivy is used to perform the security scan, and the results are saved in a text file.
```yaml
- name: Scan image with Trivy
uses: aquasecurity/trivy-action@0.24.0
with:
image-ref: local-image:latest
format: "table"
severity: "CRITICAL,HIGH"
output: trivy-result.txt
- name: Check Trivy result file
run: cat trivy-result.txt
```
https://github.com/aquasecurity/trivy-action/tree/master/
### 4. Format Trivy Scan Results
Based on the scan results, a detailed comment format is created.
```yaml
- name: Format Trivy Scan Result
run: |
if [ -s trivy-result.txt ]; then
echo -e "## Vulnerability Scan Results\n<details><summary>Details</summary>\n\n\`\`\`\n$(cat trivy-result.txt)\n\`\`\`\n</details>" > formatted-trivy-result.md
else
echo -e "## Vulnerability Scan Results\nNo vulnerabilities were detected." > formatted-trivy-result.md
fi
```
### 5. Comment on PR with Trivy Scan Results
The formatted scan results are posted as a comment on the PR.
```yaml
- name: Comment PR with Trivy scan results
uses: marocchino/sticky-pull-request-comment@v2
with:
path: formatted-trivy-result.md
```
### 6. Cleanup
Finally, the used files are deleted to maintain a clean environment.
```yaml
- name: Clean up Trivy result file
run: rm -f trivy-result.txt formatted-trivy-result.md
```
## Conclusion
In conclusion, integrating the `scan-and-comment` job within our CI pipeline using GitHub Actions enhances our security posture by ensuring Docker images are scanned for vulnerabilities at every critical PR juncture. This automation not only streamlines our security checks but also fosters an environment where security consciousness is an integral part of the development process, maintaining high standards across all deployments. | suzuki0430 |
1,922,814 | Mastering NestJS: Building Robust Applications with Core Concepts | NestJS is a powerful framework that allows building various types of applications, including APIs,... | 0 | 2024-07-14T03:09:26 | https://dev.to/vyan/mastering-nestjs-building-robust-applications-with-core-concepts-5gm3 | webdev, javascript, beginners, nestjs | NestJS is a powerful framework that allows building various types of applications, including APIs, microservices, and standalone apps. It utilizes modules, controllers, providers, middleware, guards, interceptors, pipes, and exception filters to manage the request handling flow effectively. This blog will dive into the core concepts of NestJS, providing examples to help you understand how to leverage its features for building robust applications.
## Key Concepts of NestJS
### Modules: The Building Blocks
Modules are the fundamental building blocks of a Nest application, forming a graph structure where modules can be nested within each other. A module is a class annotated with a `@Module` decorator, which organizes related components such as controllers, providers, and services.
```typescript
// src/app.module.ts
import { Module } from '@nestjs/common';
import { UsersModule } from './users/users.module';
@Module({
imports: [UsersModule],
})
export class AppModule {}
```
### Controllers: Handling Requests
Controllers in NestJS handle incoming requests and generate responses. They define routes and methods for request handling, enabling the creation of endpoints for various operations.
```typescript
// src/users/users.controller.ts
import { Controller, Get } from '@nestjs/common';
import { UsersService } from './users.service';
@Controller('users')
export class UsersController {
constructor(private readonly usersService: UsersService) {}
@Get()
findAll() {
return this.usersService.findAll();
}
}
```
### Providers: Dependency Injection
Providers in NestJS are classes that can be injected as dependencies into other classes. This facilitates code organization and reusability.
```typescript
// src/users/users.service.ts
import { Injectable } from '@nestjs/common';
@Injectable()
export class UsersService {
private readonly users = ['John Doe', 'Jane Doe'];
findAll() {
return this.users;
}
}
```
### Middleware: Controlling Request Flow
Middleware in NestJS can log incoming requests and control request flow stages. Middleware functions can execute before the route handler is invoked.
```typescript
// src/common/middleware/logger.middleware.ts
import { Injectable, NestMiddleware } from '@nestjs/common';
import { Request, Response, NextFunction } from 'express';
@Injectable()
export class LoggerMiddleware implements NestMiddleware {
use(req: Request, res: Response, next: NextFunction) {
console.log(`Request...`);
next();
}
}
// src/app.module.ts
import { MiddlewareConsumer, Module, NestModule } from '@nestjs/common';
import { LoggerMiddleware } from './common/middleware/logger.middleware';
@Module({
// ...
})
export class AppModule implements NestModule {
configure(consumer: MiddlewareConsumer) {
consumer
.apply(LoggerMiddleware)
.forRoutes('*');
}
}
```
### Guards: Security Checks
Guards in NestJS act as security checks, determining if requests meet specified conditions like roles or permissions before reaching the root handler.
```typescript
// src/common/guards/roles.guard.ts
import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
@Injectable()
export class RolesGuard implements CanActivate {
canActivate(context: ExecutionContext): boolean {
const request = context.switchToHttp().getRequest();
const user = request.user;
return user && user.roles && user.roles.includes('admin');
}
}
// src/app.module.ts
import { APP_GUARD } from '@nestjs/core';
import { RolesGuard } from './common/guards/roles.guard';
@Module({
providers: [
{
provide: APP_GUARD,
useClass: RolesGuard,
},
],
})
export class AppModule {}
```
### Interceptors: Managing Request and Response
Interceptors provide full control over request and response cycles, allowing tasks like logging, caching, and data mapping before and after the root handler.
```typescript
// src/common/interceptors/logging.interceptor.ts
import {
Injectable,
NestInterceptor,
ExecutionContext,
CallHandler,
} from '@nestjs/common';
import { Observable } from 'rxjs';
import { tap } from 'rxjs/operators';
@Injectable()
export class LoggingInterceptor implements NestInterceptor {
intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
console.log('Before...');
const now = Date.now();
return next
.handle()
.pipe(
tap(() => console.log(`After... ${Date.now() - now}ms`)),
);
}
}
// src/app.module.ts
import { APP_INTERCEPTOR } from '@nestjs/core';
import { LoggingInterceptor } from './common/interceptors/logging.interceptor';
@Module({
providers: [
{
provide: APP_INTERCEPTOR,
useClass: LoggingInterceptor,
},
],
})
export class AppModule {}
```
### Pipes: Validating and Transforming Data
Pipes in NestJS validate and transform data before it reaches the handler. This ensures data meets predefined criteria for processing.
```typescript
// src/common/pipes/validation.pipe.ts
import { PipeTransform, Injectable, ArgumentMetadata, BadRequestException } from '@nestjs/common';
@Injectable()
export class ValidationPipe implements PipeTransform {
transform(value: any, metadata: ArgumentMetadata) {
if (typeof value !== 'string') {
throw new BadRequestException('Validation failed');
}
return value.toUpperCase();
}
}
// src/app.module.ts
import { APP_PIPE } from '@nestjs/core';
import { ValidationPipe } from './common/pipes/validation.pipe';
@Module({
providers: [
{
provide: APP_PIPE,
useClass: ValidationPipe,
},
],
})
export class AppModule {}
```
### Exception Filters: Handling Errors
Exception filters catch and handle errors from various parts of request handling, providing a centralized way to manage errors and ensure consistent error responses.
```typescript
// src/common/filters/http-exception.filter.ts
import { ExceptionFilter, Catch, ArgumentsHost, HttpException } from '@nestjs/common';
import { Request, Response } from 'express';
@Catch(HttpException)
export class HttpExceptionFilter implements ExceptionFilter {
catch(exception: HttpException, host: ArgumentsHost) {
const ctx = host.switchToHttp();
const response = ctx.getResponse<Response>();
const request = ctx.getRequest<Request>();
const status = exception.getStatus();
response.status(status).json({
statusCode: status,
timestamp: new Date().toISOString(),
path: request.url,
});
}
}
// src/app.module.ts
import { APP_FILTER } from '@nestjs/core';
import { HttpExceptionFilter } from './common/filters/http-exception.filter';
@Module({
providers: [
{
provide: APP_FILTER,
useClass: HttpExceptionFilter,
},
],
})
export class AppModule {}
```
## Conclusion
NestJS provides a robust framework for building scalable and maintainable applications. By understanding and utilizing its core concepts — modules, controllers, providers, middleware, guards, interceptors, pipes, and exception filters — you can effectively manage the request handling flow and create applications that are versatile and easy to maintain. These examples demonstrate how to apply these concepts in real-world scenarios, helping you to craft powerful and efficient NestJS applications. | vyan |
1,922,816 | cat() in PyTorch | Buy Me a Coffee☕ *Memos: My post explains stack(). My post explains hstack() and... | 0 | 2024-07-14T03:11:39 | https://dev.to/hyperkai/cat-in-pytorch-4jea | pytorch, cat, tensor, function | [Buy Me a Coffee](ko-fi.com/superkai)☕
*Memos:
- [My post](https://dev.to/hyperkai/stack-in-pytorch-1bp1) explains [stack()](https://pytorch.org/docs/stable/generated/torch.stack.html).
- [My post](https://dev.to/hyperkai/hstack-and-columnstack-in-pytorch-2mfb) explains [hstack()](https://pytorch.org/docs/stable/generated/torch.hstack.html) and [column_stack()](https://pytorch.org/docs/stable/generated/torch.column_stack.html).
- [My post](https://dev.to/hyperkai/vstack-and-dstack-in-pytorch-58ml) explains [vstack()](https://pytorch.org/docs/stable/generated/torch.vstack.html) and [dstack()](https://pytorch.org/docs/stable/generated/torch.dstack.html).
[cat()](https://pytorch.org/docs/stable/generated/torch.cat.html) can get the 1D or more D concatenated tensor of zero or more elements from the one or more 1D or more D tensors of zero or more elements as shown below:
*Memos:
- `cat()` can be used with `torch` but not with a tensor.
- The 1st argument with `torch` is `tensors`(Required-Type:`tuple` or `list` of `tensor` of `int`, `float`, `complex` or `bool`). *Basically, the size of tensors must be the same.
- The 2nd argument with `torch` is `dim`(Optional-Default:`0`-Type:`int`).
- There is `out` argument with `torch`(Optional-Type:`tensor`):
*Memos:
- `out=` must be used.
- [My post](https://dev.to/hyperkai/set-out-with-out-argument-functions-pytorch-3ee) explains `out` argument.
- `tensors+1D` tensor is returned.
- [concat()](https://pytorch.org/docs/stable/generated/torch.concat.html) is the alias of `cat()`.
```python
import torch
tensor1 = torch.tensor([2, 7, 4])
tensor2 = torch.tensor([8, 3, 2])
tensor3 = torch.tensor([5, 0, 8])
torch.cat(tensors=(tensor1, tensor2, tensor3))
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=0)
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=-1)
# tensor([2, 7, 4, 8, 3, 2, 5, 0, 8])
tensor1 = torch.tensor([[2, 7, 4], [8, 3, 2]])
tensor2 = torch.tensor([[5, 0, 8], [3, 6, 1]])
tensor3 = torch.tensor([[9, 4, 7], [1, 0, 5]])
torch.cat(tensors=(tensor1, tensor2, tensor3))
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=0)
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=-2)
# tensor([[2, 7, 4],
# [8, 3, 2],
# [5, 0, 8],
# [3, 6, 1],
# [9, 4, 7],
# [1, 0, 5]])
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=1)
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=-1)
# tensor([[2, 7, 4, 5, 0, 8, 9, 4, 7],
# [8, 3, 2, 3, 6, 1, 1, 0, 5]])
tensor1 = torch.tensor([[[2, 7, 4], [8, 3, 2]],
[[5, 0, 8], [3, 6, 1]]])
tensor2 = torch.tensor([[[9, 4, 7], [1, 0, 5]],
[[6, 7, 4], [2, 1, 9]]])
tensor3 = torch.tensor([[[1, 6, 3], [9, 6, 0]],
[[0, 8, 7], [3, 5, 2]]])
torch.cat(tensors=(tensor1, tensor2, tensor3))
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=0)
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=-3)
# tensor([[[2, 7, 4], [8, 3, 2]],
# [[5, 0, 8], [3, 6, 1]],
# [[9, 4, 7], [1, 0, 5]],
# [[6, 7, 4], [2, 1, 9]],
# [[1, 6, 3], [9, 6, 0]],
# [[0, 8, 7], [3, 5, 2]]])
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=1)
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=-2)
# tensor([[[2, 7, 4],
# [8, 3, 2],
# [9, 4, 7],
# [1, 0, 5],
# [1, 6, 3],
# [9, 6, 0]],
# [[5, 0, 8],
# [3, 6, 1],
# [6, 7, 4],
# [2, 1, 9],
# [0, 8, 7],
# [3, 5, 2]]])
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=2)
torch.cat(tensors=(tensor1, tensor2, tensor3), dim=-1)
# tensor([[[2, 7, 4, 9, 4, 7, 1, 6, 3],
# [8, 3, 2, 1, 0, 5, 9, 6, 0]],
# [[5, 0, 8, 6, 7, 4, 0, 8, 7],
# [3, 6, 1, 2, 1, 9, 3, 5, 2]]])
tensor1 = torch.tensor([[[2., 7., 4.], [8., 3., 2.]],
[[5., 0., 8.], [3., 6., 1.]]])
tensor2 = torch.tensor([[[9., 4., 7.], [1., 0., 5.]],
[[6., 7., 4.], [2., 1., 9.]]])
tensor3 = torch.tensor([[[1., 6., 3.], [9., 6., 0.]],
[[0., 8., 7.], [3., 5., 2.]]])
torch.cat(tensors=(tensor1, tensor2, tensor3))
# tensor([[[2., 7., 4.], [8., 3., 2.]],
# [[5., 0., 8.], [3., 6., 1.]],
# [[9., 4., 7.], [1., 0., 5.]],
# [[6., 7., 4.], [2., 1., 9.]],
# [[1., 6., 3.], [9., 6., 0.]],
# [[0., 8., 7.], [3., 5., 2.]]])
tensor1 = torch.tensor([[[2.+0.j, 7.+0.j, 4.+0.j],
[8.+0.j, 3.+0.j, 2.+0.j]],
[[5.+0.j, 0.+0.j, 8.+0.j],
[3.+0.j, 6.+0.j, 1.+0.j]]])
tensor2 = torch.tensor([[[9.+0.j, 4.+0.j, 7.+0.j],
[1.+0.j, 0.+0.j, 5.+0.j]],
[[6.+0.j, 7.+0.j, 4.+0.j],
[2.+0.j, 1.+0.j, 9.+0.j]]])
tensor3 = torch.tensor([[[1.+0.j, 6.+0.j, 3.+0.j],
[9.+0.j, 6.+0.j, 0.+0.j]],
[[0.+0.j, 8.+0.j, 7.+0.j],
[3.+0.j, 5.+0.j, 2.+0.j]]])
torch.cat(tensors=(tensor1, tensor2, tensor3))
# tensor([[[2.+0.j, 7.+0.j, 4.+0.j],
# [8.+0.j, 3.+0.j, 2.+0.j]],
# [[5.+0.j, 0.+0.j, 8.+0.j],
# [3.+0.j, 6.+0.j, 1.+0.j]],
# [[9.+0.j, 4.+0.j, 7.+0.j],
# [1.+0.j, 0.+0.j, 5.+0.j]],
# [[6.+0.j, 7.+0.j, 4.+0.j],
# [2.+0.j, 1.+0.j, 9.+0.j]],
# [[1.+0.j, 6.+0.j, 3.+0.j],
# [9.+0.j, 6.+0.j, 0.+0.j]],
# [[0.+0.j, 8.+0.j, 7.+0.j],
# [3.+0.j, 5.+0.j, 2.+0.j]]])
tensor1 = torch.tensor([[[True, False, True], [True, False, True]],
[[False, True, False], [False, True, False]]])
tensor2 = torch.tensor([[[False, True, False], [False, True, False]],
[[True, False, True], [True, False, True]]])
tensor3 = torch.tensor([[[True, False, True], [True, False, True]],
[[False, True, False], [False, True, False]]])
torch.cat(tensors=(tensor1, tensor2, tensor3))
# tensor([[[True, False, True], [True, False, True]],
# [[False, True, False], [False, True, False]],
# [[False, True, False], [False, True, False]],
# [[True, False, True], [True, False, True]],
# [[True, False, True], [True, False, True]],
# [[False, True, False], [False, True, False]]])
tensor1 = torch.tensor([[[0, 1, 2]]])
tensor2 = torch.tensor([])
tensor3 = torch.tensor([[[0, 1, 2]]])
torch.cat(tensors=(tensor1, tensor2, tensor3))
# tensor([[[0., 1., 2.]],
# [[0., 1., 2.]]])
``` | hyperkai |
1,922,826 | Fix slow queries in Django when using annotate and subqueries | Django’s ORM is quite useful and versatile, it can perform most of the common SQL operations, such as... | 0 | 2024-07-15T17:19:50 | https://coffeebytes.dev/en/fix-slow-queries-in-django-when-using-annotate-and-subqueries/ | django, database, postgres, backend | ---
title: Fix slow queries in Django when using annotate and subqueries
date: 2024-07-15 21:51:01 UTC
published: True
tags: django,databases,postgres,backend
canonical_url: https://coffeebytes.dev/en/fix-slow-queries-in-django-when-using-annotate-and-subqueries/
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/erj82s7vg5ed1remb6n1.jpg
---
Django’s ORM is quite useful and versatile, it can perform most of the common SQL operations, such as filtering, partitioning, joins or sorting information, creating aliases, but it also has its limitations, especially when combined with subqueries, today I’ll tell you about one of its limitations and how to solve it.
Despite its few weaknesses, its ORM is one of the [reasons why you should use Django](https://coffeebytes.dev/en/why-should-you-use-django-framework/).
## Django annotate and subqueries, a performance problem
The Django annotate function, which I already told you about in a [post where I explain the differences between annotate and aggregate](https://coffeebytes.dev/en/django-annotate-and-aggregate-explained/) in Django, is used to add information to a SQL query, this information can be an average, a sum or anything else you want, the problem occurs when that information comes from a subquery.
Let me give you an example:
``` python
from django.db.models import F
from django.db.models.expressions import Subquery
first_subquery = Subquery(...)
second_subquery = Subquery(...)
queryset = YourModel.objects.annotate(first_annotation=first_subquery)
.annotate(second_annotation=second_subquery)
.annotate(
third_annotation=F("first_subquery") - F("second_subquery"))
.annotate(
fourth_annotation=((F("first_subquery") - F("second_subquery")) / F("second_subquery"))
)
```
The problem here arises when we mix subqueries with annotate, and then proceed to use those annotations in other annotations.
Django does not have the ability to recognize that it is already repeating the subqueries over and over again, so the SQL it generates repeats the same subqueries over and over again, resulting in a poorly performing query; we fall into the famous _n+1 queries_ problem.
### SQL generated by Django using annotate and subqueries is inefficient.
Worse, where exactly is the problem? The django ORM translates the above queryset into the following SQL query:
``` sql
SELECT columns
(SELECT ...first_subquery - SELECT ...second_subquery) AS "third_annotation",
(SELECT ...first_subquery - SELECT ...second_subquery)/(SELECT ...first_subquery) as "fourth_annotation",
(SELECT ...first_subquery) as "first_annotation",
(SELECT ...second_subquery) as "second_annotation"
FROM table_a LEFT OUTER JOIN table_b
ON table_a.id = table_b.id
GROUP BY table_a.id ...
```
Notice how Django is reusing the SQL from each subquery multiple times during the query, instead of performing the query once and then reusing that value.
If you don’t know how to get the SQL query that Django’s ORM generates, I remind you, _qs_ represents your queryset:
``` python
print(qs.query)
```
How to fix this? Well, one of the ways to fix this SQL query is to use Common Table Expressions (CTEs), however, as of this writing, **Django does not support Common Table Expressions (CTEs)**, so we will have to use a raw query instead of the methods already provided by the Django ORM.
## Use Common Table Expressions (CTEs) to improve annotate and subqueries performance.
The solution is to create a raw query, remember that modern versions of django you can use the raw method of your [model manager](https://coffeebytes.dev/en/managers-or-custom-handlers-in-django/) so that Django automatically assigns it to a queryset object of your respective model.
``` python
qs = YourModel.objects.raw("YOUR_SQL_RAW_QUERY_GOES_HERE")
```
The SQL query with the Common Table Expressions (CTEs) that we will use would look like this:
``` sql
WITH my_cte AS (
SELECT
a.column
(SELECT ...subquery_one) AS first_annotation,
(SELECT ...subquery_two) AS second_annotation
FROM table_a
LEFT OUTER JOIN table_b
ON table_a.id = table_b.id
GROUP BY table_a.id ...
)
SELECT
columns,
first_annotation,
second_annotation,
first_annotation - second_annotation AS third_annotation,
(first_annotation - second_annotation)/first_annotation AS fourth_annotation
FROM my_cte;
```
As you can see the subqueries are in parentheses and each of them appears only once.
Using Common Table Expressions (CTEs) will allow us an efficient query, avoiding multiple repetitive queries to the database and will give us a performance that outperforms the Django ORM’s query by several orders of magnitude. Perhaps implementing CTEs is one of the [actions that can be taken to improve the Django framework.](https://coffeebytes.dev/en/how-to-improve-django-framework/) | zeedu_dev |
1,922,829 | Golang File Paths | Portable Path Operations | In this lab, you will explore the usage of the `filepath` package in Go to perform various operations on file paths, including constructing portable paths, splitting paths into directory and file components, checking path absoluteness, finding file extensions, and determining relative paths between two paths. | 27,982 | 2024-07-14T03:25:48 | https://dev.to/labex/golang-file-paths-portable-path-operations-1cb9 | go, coding, programming, tutorial |
## Introduction
The `filepath` package in Golang provides functions to parse and construct file paths in a way that is portable between operating systems.
## File Paths
In [this lab](https://labex.io/tutorials/file-paths-15475), you need to use the `filepath` package to perform various operations on file paths, such as constructing paths in a portable way, splitting a path into directory and file components, checking whether a path is absolute, finding the extension of a file, and finding a relative path between two paths.
- Use `Join` to construct paths in a portable way.
- Use `Dir` and `Base` to split a path into directory and file components.
- Use `IsAbs` to check whether a path is absolute.
- Use `Ext` to find the extension of a file.
- Use `TrimSuffix` to remove the extension from a file name.
- Use `Rel` to find a relative path between two paths.
```sh
$ go run file-paths.go
p: dir1/dir2/filename
dir1/filename
dir1/filename
Dir(p): dir1/dir2
Base(p): filename
false
true
.json
config
t/file
../c/t/file
```
There is the full code below:
```go
// The `filepath` package provides functions to parse
// and construct *file paths* in a way that is portable
// between operating systems; `dir/file` on Linux vs.
// `dir\file` on Windows, for example.
package main
import (
"fmt"
"path/filepath"
"strings"
)
func main() {
// `Join` should be used to construct paths in a
// portable way. It takes any number of arguments
// and constructs a hierarchical path from them.
p := filepath.Join("dir1", "dir2", "filename")
fmt.Println("p:", p)
// You should always use `Join` instead of
// concatenating `/`s or `\`s manually. In addition
// to providing portability, `Join` will also
// normalize paths by removing superfluous separators
// and directory changes.
fmt.Println(filepath.Join("dir1//", "filename"))
fmt.Println(filepath.Join("dir1/../dir1", "filename"))
// `Dir` and `Base` can be used to split a path to the
// directory and the file. Alternatively, `Split` will
// return both in the same call.
fmt.Println("Dir(p):", filepath.Dir(p))
fmt.Println("Base(p):", filepath.Base(p))
// We can check whether a path is absolute.
fmt.Println(filepath.IsAbs("dir/file"))
fmt.Println(filepath.IsAbs("/dir/file"))
filename := "config.json"
// Some file names have extensions following a dot. We
// can split the extension out of such names with `Ext`.
ext := filepath.Ext(filename)
fmt.Println(ext)
// To find the file's name with the extension removed,
// use `strings.TrimSuffix`.
fmt.Println(strings.TrimSuffix(filename, ext))
// `Rel` finds a relative path between a *base* and a
// *target*. It returns an error if the target cannot
// be made relative to base.
rel, err := filepath.Rel("a/b", "a/b/t/file")
if err != nil {
panic(err)
}
fmt.Println(rel)
rel, err = filepath.Rel("a/b", "a/c/t/file")
if err != nil {
panic(err)
}
fmt.Println(rel)
}
```
## Summary
The `filepath` package in Golang provides functions to work with file paths in a portable way. By using these functions, you can construct paths, split them into directory and file components, check whether they are absolute, find the extension of a file, and find a relative path between two paths.
---
> 🚀 Practice Now: [File Path Handling in Golang](https://labex.io/tutorials/file-paths-15475)
---
## Want to Learn More?
- 🌳 Learn the latest [Go Skill Trees](https://labex.io/skilltrees/go)
- 📖 Read More [Go Tutorials](https://labex.io/tutorials/category/go)
- 💬 Join our [Discord](https://discord.gg/J6k3u69nU6) or tweet us [@WeAreLabEx](https://twitter.com/WeAreLabEx) | labby |
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