id int64 5 1.93M | title stringlengths 0 128 | description stringlengths 0 25.5k | collection_id int64 0 28.1k | published_timestamp timestamp[s] | canonical_url stringlengths 14 581 | tag_list stringlengths 0 120 | body_markdown stringlengths 0 716k | user_username stringlengths 2 30 |
|---|---|---|---|---|---|---|---|---|
1,897,437 | Is It Spam? | This is a submission for Twilio Challenge v24.06.12 What I Built Everyone who has dealt... | 0 | 2024-06-23T01:39:38 | https://dev.to/briandoesdev/is-it-spam-2ink | devchallenge, twiliochallenge, ai, twilio | *This is a submission for [Twilio Challenge v24.06.12](https://dev.to/challenges/twilio)*
## What I Built
Everyone who has dealt with spam calls knows how stressful it can be getting a call from an unknown number. Maybe you are waiting for a call from a job application, or your childs teacher, or the doctor. There are a thousand reasons you may need to keep yourself available to unknown callers. But you don't want to pickup spam callers, letting them know your number is active and that you answer, only to start getting more spam calls.
Well what I've built is a product that utilizes Twilio and AI to help you determine if a caller is potentially spam or not. By providing the callers number, "Is It Spam?" leverages Twilio's Lookup API and add-on marketplace to retrieve data about the caller. That data is then parsed by GPT-3.5 Turbo to determine if the caller is spam, using attributes associated to the number like line type, name, historical data, etc... This is then presented back to the user either via the web interface.
**This service will only be public for the duration of the contest and judging. Due to expenses with using the Twilio and OpenAI API's, I cannot afford to keep this running. The source code is available, all you need to run this is the latest version of Go (go1.22.4), a Twilio account, and an OpenAI API Key.**
## Demo
Demo Link: [Is It Spam?](https://is-it-spam.brians.land)
GitHub Link: [briandoesdev/is-it-spam](https://github.com/briandoesdev/is-it-spam)
<!-- Screenshots -->
## Twilio and AI
I use the Twilio Lookup API, along with a marketplace add-on, to look up data about the provided number. This is then passed to the OpenAI API to parse and summarize the likelyhood this is spam via specified attributes.
## Additional Prize Categories
- Impactful Innovators: Whilst this could be subjective, I'd say helping prevent spam calls, and knowing who is calling from an unknown number can provide a societal impact. I know that I've gotten less stress from calls since developing this service.
## Future
There are a few features I'd like to add, along with cleaning up the code, fixing some issues, and adding the SMS service (once A2P is complete).
<!-- Don't forget to add a cover image (if you want). -->
<!-- Thanks for participating! --> | briandoesdev |
1,897,339 | Creating and Connecting to a Linux VM using a Public Key | Step 1: Create a Linux VM on Azure Log in to the Azure portal and navigate to the Virtual Machines... | 0 | 2024-06-23T01:39:00 | https://dev.to/tojumercy1/creating-and-connecting-to-a-linux-vm-using-a-public-key-3b1 | learning, linux, azure, microsoft | Step 1: Create a Linux VM on Azure
- Log in to the Azure portal and navigate to the Virtual Machines page
- Click "Create a virtual machine" and select "Linux" as the operating system.
- Choose a Linux distribution (e.g., Ubuntu) and configure the VM settings as desired.
- In the "Authentication" section, select "SSH public key" and paste the contents of your public key file (mykey.pub)
.
Step 2: Connect to the Linux VM using SSH
- Once the VM is created, navigate to the VM's overview page and click "Connect".
- Select "SSH" as the connection method.
- In the SSH connection dialog, enter the username and private key file (mykey) .
- Click "Connect" to establish the SSH connection.
Step 3: Verify the Connection
- Once connected, you should see a terminal prompt for the Linux VM.
- Run the command using Window PowerShell -a to verify that you are connected to the Linux VM.
That's it! You have successfully created and connected to a Linux VM using a public key.
Note: This is just a general outline, and specific steps may vary depending on your Azure subscription and VM configuration. | tojumercy1 |
1,897,436 | Guia Completo para Navegação no React Native com TypeScript | Introdução Neste artigo, vamos explorar como configurar a navegação em um projeto React... | 0 | 2024-06-23T01:34:08 | https://dev.to/leeodev/guia-completo-para-navegacao-no-react-native-com-typescript-45mf | ## Introdução
Neste artigo, vamos explorar como configurar a navegação em um projeto React Native usando TypeScript. Vamos cobrir dois tipos populares de navegadores: o Bottom Tab Navigator e o Stack Navigator. Também abordaremos a estrutura dos tipos de navegação, como definir e usar parâmetros, e a razão de usar undefined em certos casos.
## Pré-requisitos
Antes de começarmos, certifique-se de ter o React Native instalado e configurado em seu ambiente de desenvolvimento. Se você não fez isso, siga a documentação oficial para configurar seu ambiente.
## Passo 1: Configuração do Projeto
**1.1 Criação do Projeto**
Crie um novo projeto React Native:
```
npx react-native init MyNavigationApp
cd MyNavigationApp
```
**1.2 Instalação das Dependências**
Instale as dependências necessárias para o React Navigation:
```
npm install @react-navigation/native @react-navigation/bottom-tabs @react-navigation/stack
npm install react-native-screens react-native-safe-area-context
```
**Instale as definições de tipos para TypeScript:**
```
npm install --save-dev @types/react @types/react-native
npm install --save-dev @types/react-navigation @types/react-navigation-bottom-tabs @types/react-navigation-stack
```
## Passo 2: Definindo Tipos de Navegação
Antes de configurar os navegadores, é essencial definir os tipos de navegação. Isso ajuda a garantir que a navegação seja tipada corretamente, evitando erros comuns.
**2.1 Crie um Arquivo de Tipos**
Crie um arquivo navigationTypes.ts para definir os tipos de parâmetros de navegação:
```
// src/navigationTypes.ts
// Define os parâmetros de navegação para o Bottom Tab Navigator
export type BottomTabNavigatorParams = {
Home: {
screen: string;
params: {
sort: string;
};
};
Settings: undefined; // Esta tela não espera nenhum parâmetro
};
// Define os parâmetros de navegação para o Stack Navigator
export type StackNavigatorParams = {
Home: undefined; // Esta tela não espera nenhum parâmetro
Details: {
itemId: number;
otherParam: string;
};
};
```
**Por Que Usar undefined?**
Quando uma tela não espera nenhum parâmetro, usamos `undefined` para indicar isso. Isso ajuda o TypeScript a garantir que você não passe acidentalmente parâmetros para uma tela que não espera nenhum. Por exemplo:
```
type StackNavigatorParams = {
Home: undefined; // A tela Home não espera nenhum parâmetro
Details: {
itemId: number;
otherParam: string;
};
};
```
**Estrutura dos Parâmetros**
No exemplo acima, a tela `Details` espera dois parâmetros: `itemId` e `otherParam`. Isso é definido no tipo `StackNavigatorParams`.
## Passo 3: Configuração do React Navigation
**3.1 Configuração Inicial**
Configure a inicialização do `React Navigation` no arquivo `index.js`:
```
import 'react-native-gesture-handler';
import { AppRegistry } from 'react-native';
import App from './App';
import { name as appName } from './app.json';
AppRegistry.registerComponent(appName, () => App);
3.2 Configuração do App.tsx com Bottom Tab Navigator
// App.tsx
import * as React from 'react';
import { NavigationContainer } from '@react-navigation/native';
import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';
import HomeScreen from './src/screens/HomeScreen';
import SettingsScreen from './src/screens/SettingsScreen';
// Importa os tipos definidos no arquivo de tipos
import { BottomTabNavigatorParams } from './src/navigationTypes';
// Criação do Bottom Tab Navigator
const Tab = createBottomTabNavigator<BottomTabNavigatorParams>();
// Componente principal com a navegação
export default function App() {
return (
<NavigationContainer>
<Tab.Navigator>
<Tab.Screen name="Home" component={HomeScreen} />
<Tab.Screen name="Settings" component={SettingsScreen} />
</Tab.Navigator>
</NavigationContainer>
);
}
```
**3.3 Configuração do App.tsx com Stack Navigator**
```
// App.tsx
import * as React from 'react';
import { NavigationContainer } from '@react-navigation/native';
import { createStackNavigator } from '@react-navigation/stack';
import HomeScreen from './src/screens/HomeScreen';
import DetailsScreen from './src/screens/DetailsScreen';
// Importa os tipos definidos no arquivo de tipos
import { StackNavigatorParams } from './src/navigationTypes';
// Criação do Stack Navigator
const Stack = createStackNavigator<StackNavigatorParams>();
// Componente principal com a navegação
export default function App() {
return (
<NavigationContainer>
<Stack.Navigator>
<Stack.Screen name="Home" component={HomeScreen} />
<Stack.Screen name="Details" component={DetailsScreen} />
</Stack.Navigator>
</NavigationContainer>
);
}
```
## Passo 4: Criando as Telas
**4.1 Tela Home para Bottom Tab Navigator**
```
// src/screens/HomeScreen.tsx
import * as React from 'react';
import { View, Text, Button } from 'react-native';
import { useNavigation } from '@react-navigation/native';
import { BottomTabNavigationProp } from '@react-navigation/bottom-tabs';
import { BottomTabNavigatorParams } from '../navigationTypes';
type HomeScreenNavigationProp = BottomTabNavigationProp<BottomTabNavigatorParams, 'Home'>;
const HomeScreen: React.FC = () => {
const navigation = useNavigation<HomeScreenNavigationProp>();
const navigateToFeed = () => {
navigation.navigate('Home', {
screen: 'Feed',
params: { sort: 'latest' },
});
};
return (
<View>
<Text>Home Screen</Text>
<Button title="Go to Feed" onPress={navigateToFeed} />
</View>
);
};
export default HomeScreen;
```
**4.2 Tela Settings para Bottom Tab Navigator**
```
// src/screens/SettingsScreen.tsx
import * as React from 'react';
import { View, Text } from 'react-native';
const SettingsScreen: React.FC = () => {
return (
<View>
<Text>Settings Screen</Text>
</View>
);
};
export default SettingsScreen;
```
**4.3 Tela Home para Stack Navigator**
```
// src/screens/HomeScreen.tsx
import * as React from 'react';
import { View, Text, Button } from 'react-native';
import { useNavigation } from '@react-navigation/native';
import { StackNavigationProp } from '@react-navigation/stack';
import { StackNavigatorParams } from '../navigationTypes';
type HomeScreenNavigationProp = StackNavigationProp<StackNavigatorParams, 'Home'>;
const HomeScreen: React.FC = () => {
const navigation = useNavigation<HomeScreenNavigationProp>();
const navigateToDetails = () => {
navigation.navigate('Details', {
itemId: 42,
otherParam: 'anything you want here',
});
};
return (
<View>
<Text>Home Screen</Text>
<Button title="Go to Details" onPress={navigateToDetails} />
</View>
);
};
export default HomeScreen;
```
**4.4 Tela Details para Stack Navigator**
```
// src/screens/DetailsScreen.tsx
import * as React from 'react';
import { View, Text } from 'react-native';
import { useRoute, RouteProp } from '@react-navigation/native';
import { StackNavigatorParams } from '../navigationTypes';
type DetailsScreenRouteProp = RouteProp<StackNavigatorParams, 'Details'>;
const DetailsScreen: React.FC = () => {
const route = useRoute<DetailsScreenRouteProp>();
// Acessando parâmetros
const { itemId, otherParam } = route.params;
return (
<View>
<Text>Details Screen</Text>
<Text>itemId: {itemId}</Text>
<Text>otherParam: {otherParam}</Text>
</View>
);
};
export default DetailsScreen;
```
## Passo 5: Entendendo e Usando Parâmetros
**Como Definir Parâmetros**
No exemplo acima, a tela `Details` espera dois parâmetros: `itemId` e `otherParam`. Esses parâmetros são definidos no tipo `StackNavigatorParams`.
```
// src/navigationTypes.ts
export type StackNavigatorParams = {
Home: undefined; // Esta tela não espera nenhum parâmetro
Details: {
itemId: number;
otherParam: string;
};
};
```
**Como Navegar com Parâmetros**
Para navegar para a tela Details com os parâmetros `itemId` e `otherParam`, usamos o `navigate` como mostrado no exemplo da `HomeScreen`:
```
const navigateToDetails = () => {
navigation.navigate('Details', {
itemId: 42,
otherParam: 'anything you want here',
});
};
```
**Como Receber Parâmetros**
Para acessar os parâmetros dentro de uma tela, usamos o hook `useRoute` do `React Navigation`:
```
import { useRoute, RouteProp } from '@react-navigation/native';
type DetailsScreenRouteProp = RouteProp<StackNavigatorParams, 'Details'>;
const DetailsScreen: React.FC = () => {
const route = useRoute<DetailsScreenRouteProp>();
// Acessando parâmetros
const { itemId, otherParam } = route.params;
return (
<View>
<Text>Details Screen</Text>
<Text>itemId: {itemId}</Text>
<Text>otherParam: {otherParam}</Text>
</View>
);
};
export default DetailsScreen;
```
**Conclusão**
Este guia detalhado mostrou como configurar tanto o Bottom Tab Navigator quanto o Stack Navigator com TypeScript em um projeto React Native. Começamos definindo os tipos de navegação para garantir uma tipagem segura ao longo do projeto. Em seguida, configuramos os navegadores e criamos telas simples para demonstração. Discutimos também a estrutura dos tipos de parâmetros de navegação e por que usamos `undefined` para indicar telas que não esperam parâmetros.
Implementar navegação em um aplicativo é um passo fundamental para proporcionar uma experiência de usuário fluida e intuitiva. Com o React Navigation e TypeScript, você pode construir aplicativos robustos e com menos erros de tipagem, melhorando a qualidade e a manutenibilidade do código.
Espero que este guia tenha sido útil e que você agora se sinta confortável para começar a implementar navegação em seus próprios projetos React Native com TypeScript!
| leeodev | |
1,897,434 | I built my first SaaS - NotiFast | The project is called NotiFast. The goal was to create a versatile bot that will send you... | 0 | 2024-06-23T01:22:26 | https://dev.to/jjablonskiit/i-built-my-first-saas-notifast-47do | discord, showdev, webdev, programming | The project is called **[NotiFast](https://notifast.me/)**. The goal was to create a versatile bot that will send you notifications if something changes on the websites you follow. I focused on making it work for the majority of websites. NotiFast comes with a visual creator, so you don't need any technical knowledge to use it.
> It was based on my previous open-source project [webscraper-bot](https://github.com/jjablonski-it/webscraper-bot).
## Motivation
This is the second version of this bot. The first approach was [webscraper-bot](https://github.com/jjablonski-it/webscraper-bot), which I built because I needed to be notified about new rental apartments quickly [(more about that in this post)](https://dev.to/jjablonskiit/how-to-get-apartment-with-code-web-scraping-discord-bot-2n1j). Some people started discovering the bot, and after a few months, I had around 100 users. But there was one big problem: over 90% of the users didn't manage to create a single scraping bot because it required a query selector to be inserted. So, how I interpreted it was:
- There are people looking for this kind of service.
- It needs to be way easier and detect which items you want to track automatically.
So, I gave it a try.
## What can it do?
NotiFast can notify you about:
1. **New items being added** (e.g., shop items, blog posts, videos, comments, or any list of items from a website).
2. **Content updates** (e.g., "Out of stock" notifications or price changes).
All of this is achieved using a (somewhat) simple visual creator.
> Currently, sites that require authentication or any user action before seeing the content are not supported.
## Why Discord bot form factor?
There are several reasons why Discord was the perfect choice for this application:
1. **Universal Notification Delivery**: Works seamlessly across all mobile devices.
2. **No Authentication Worries**: No need for managing user credentials.
3. **Spam Protection**: Inherent spam protection provided by Discord.
4. **Integrated Payment System**: Easy handling of payments.
5. **Developer-Friendly SDK**: Discord.js SDK is really good and easy to use.
All of the above significantly speed up development. The end goal is for it to be a web application with adapters for all major communicators like Slack or Signal, but for now, Discord makes things a lot easier.
## How did it go?
The biggest challenge was to make it versatile and work even on pages it was not prepared to work on. The solution is a lot of heuristics to determine which container is the most likely to have some relevant content. There's some room for improvement, but the effects are satisfying for now, and on most pages I tested, NotiFast can point to the correct HTML container quite fast.
Another challenge was determining which items were already seen. To identify elements, I'm using a unique element link (chosen by the user), the element's content, and a custom signature based on element's images. Combination of those three works quite effective.
I worked on this side project in the evenings and weekends after my full-time job and was able to finish it in less than 6 months. The website ([notifast.me](https://notifast.me/)) was made during one weekend.
## Try it out
At this moment, I'm running a **free** beta for the first **100** users who want to try the app (Live counter at the top of the website [**notifast.me**](https://notifast.me/)).
**[Learn more](https://notifast.me/)**
**[Join the community](https://discord.gg/unqRJcynqg)**
**[Install to your server directly](https://discord.com/api/oauth2/authorize?client_id=1186458809128996974&permissions=2147534848&scope=bot)**
Try it out yourself and see if it works for the website you're interested in!
## Next steps
After the beta testing phase, a period of bug fixes and improvements will happen. Then, proper subscription tiers will be released after user surveys and Discord verification process.
Next big milestones I see for this project are:
- Personal user commands (allow to chat with the bot and get notifications privately)
- Web interface — easier job management and possibility to add charts and other custom UI elements
- Adding other communicator interfaces — e.g., Slack, Telegram, and more
## Conclusion
**[NotiFast](https://notifast.me/)** is designed to make your life easier by notifying you of changes on the websites you care about, without requiring any technical know-how. It's still early days, and there's plenty of room for growth and improvement, so your feedback is invaluable. If you're intrigued, [join the free beta](https://notifast.me/) and let me know how it works for you!
| jjablonskiit |
1,897,417 | Clinical Decision Support Software: Revolutionizing Modern Healthcare | Introduction Clinical Decision Support Software (CDSS) represents a significant... | 27,673 | 2024-06-23T00:58:10 | https://dev.to/rapidinnovation/clinical-decision-support-software-revolutionizing-modern-healthcare-4n74 | ## Introduction
Clinical Decision Support Software (CDSS) represents a significant advancement
in the medical field, integrating information technology and healthcare to
improve patient outcomes. As healthcare systems around the world become more
complex and data-driven, the role of sophisticated tools to aid medical
professionals in their decision-making processes becomes increasingly crucial.
CDSS provides these tools, offering timely information and patient-specific
recommendations to enhance health and medical care.
## What is Clinical Decision Support Software?
Clinical Decision Support (CDS) software is an advanced technology designed to
help healthcare professionals make informed decisions about patient care. This
software integrates and analyzes medical data, providing recommendations and
insights that enhance decision-making processes. By leveraging a vast array of
clinical knowledge and patient data, CDS tools aim to improve the efficiency,
effectiveness, and overall quality of healthcare services.
## How Does Clinical Decision Support Software Work?
CDS software integrates with Electronic Health Records (EHR) to provide real-
time, evidence-based recommendations. It employs data analysis techniques such
as predictive analytics, machine learning, and natural language processing to
transform raw data into actionable insights. Alert and notification systems
further enhance patient safety by notifying clinicians of potential issues
before they become critical.
## Types of Clinical Decision Support Systems
CDSS can be categorized into knowledge-based systems, which rely on structured
medical knowledge, and non-knowledge-based systems, which use AI and machine
learning algorithms to analyze data and make decisions. Both types play
crucial roles in enhancing clinical efficiency and patient outcomes.
## Benefits of Clinical Decision Support Software
CDSS offers numerous benefits, including enhancing patient safety, improving
healthcare quality, reducing costs, and supporting healthcare providers'
decision-making. By providing real-time access to patient data and evidence-
based guidelines, CDS tools help prevent medical errors, standardize care
delivery, and improve overall patient outcomes.
## Challenges in Implementation
Implementing CDSS involves challenges such as integration issues with existing
technologies, user resistance, and data privacy and security concerns.
Addressing these challenges requires careful planning, robust testing, and
effective change management practices.
## Implementation Strategies
Successful implementation of CDSS involves assessing organizational readiness,
choosing the right software, providing comprehensive training and support for
healthcare providers, and continuous monitoring and optimization. These
strategies ensure that the technology is used effectively and to its full
potential.
## Future of Clinical Decision Support Software
The future of CDSS is poised for transformative growth, driven by advances in
AI and machine learning, predictive analytics, and personalized medicine.
These technologies will enhance the software's ability to provide real-time,
evidence-based recommendations, leading to more accurate and timely decisions
in clinical settings.
## Real-World Examples
Real-world examples, such as the use of AI in improving diagnosis accuracy and
reducing medication errors, underscore the transformative potential of
technology in healthcare. These examples highlight the significant impact of
CDSS on enhancing the accuracy and efficiency of medical services.
## Why Choose Rapid Innovation for Implementation and Development
Rapid Innovation offers expertise in AI and blockchain, customized solutions,
a proven track record, and comprehensive support. These capabilities enable
businesses to leverage emerging technologies and trends, providing a
competitive edge in the healthcare sector.
## Conclusion
As technology continues to evolve, its integration into healthcare systems
globally is expected to deepen, driving improvements in patient care,
operational efficiencies, and overall health outcomes. The ongoing research
and development in medical technology signify a promising future for the
healthcare industry, where technological advancements continue to pave the way
for more sophisticated, personalized, and accessible healthcare solutions.
📣📣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)
[Blockchain Development](https://www.rapidinnovation.io/service-
development/blockchain-app-development-company-in-usa)
[AI Development](https://www.rapidinnovation.io/ai-software-development-
company-in-usa)
[AI Development](https://www.rapidinnovation.io/ai-software-development-
company-in-usa)
## URLs
* <http://www.rapidinnovation.io/post/clinical-decision-support-software-benefits-and-implementation-strategies>
## Hashtags
#HealthcareInnovation
#ClinicalDecisionSupport
#AIinHealthcare
#PatientSafety
#HealthTechAdvancements
| rapidinnovation | |
1,897,416 | Javascript | JavaScript is a high-level, interpreted programming language, primarily the power to make web pages... | 0 | 2024-06-23T00:55:35 | https://dev.to/bekmuhammaddev/javascript-4na1 | javascript, frontend, aripovdev | JavaScript is a high-level, interpreted programming language, primarily the power to make web pages interactive. This language bug was introduced in 1995 by Brendan Eich for Netscape. JavaScript is now supported by all modern browsers and is expanding.
Key Features of JavaScript:
1. Dynamic and interpretable: JavaScript code is executed directly by the browser and does not require pre-compilation.
2. High-level programming language: JavaScript has a high level of abstraction, meaning that code written in this language can be easily understood and written by humans.
3. Object-Oriented Programming: JavaScript supports an object-oriented model that allows code to be modular and non-repetitive.
4. Functional programming: JavaScript treats functions as first-class citizens, which can be passed to or returned as arguments to other functions.
The main areas of use of JavaScript are:
1. Web Development: JavaScript is used in conjunction with HTML and CSS to make web pages interactive. Allows you to manipulate HTML elements through the DOM (Document Object Model).
2. Server-side programming: The Node.js platform allows JavaScript to be used for server-side programming as well.
3. Mobile Apps: Frameworks like React Native, Ionic, and PhoneGap allow you to develop mobile apps using JavaScript.
4. Game development: JavaScript is used to create web games using libraries such as Phaser.
Basic concepts of JavaScript
1. Variables: The var, let, and const keywords are used to declare variables in JavaScript.
2. Data Types: The main data types are number, string, boolean, object, undefined, and null.
3. Operators: There are arithmetic, comparison, logical and other operators.
4. Functions: Syntax for creating and calling functions.
5. Arrays: To store data in the form of a list.
6. Objects: Store data as key-value pairs.
JavaScript examples:
```
let name = "Alice";
const age = 30;
```
Create and call a function:
```
function greet(person) {
return "Hello, " + person + "!";
}
console.log(greet("Bob"));
```
Working with arrays:
```
let fruits = ["Apple", "Banana", "Cherry"];
console.log(fruits[1]);
```
- Loops
- for loop
- while
- do while
- Functions (Declaration)
SCOPES:
Scopes are divided into 4 types:
1-Global scope
2-Local scope
3-Function scope
4-Block scope
Global scope — The place where all code is written
Local scope — the area around the function
Function scope — the part inside the function
Block scopes — If you write something, for example: if else or for
**LOOPS**:
There are 3 loop operators that are mainly used in JavaScript.
1-while
2-do while
3-for operatorlari:
**While** recursive operator:while operation
**cansole**
**Do while** works the same as while, the difference is that it checks the condition at the end: the operation of do while
**cansole**
**FOR** The for loop works faster than other loops, is a universal loop and is used a lot:
How the game works:
**cansole**
**FUNCTION DECLERATION**
Fuction declaration => The basis of this function is that we can create a pilus function and call it wherever we want.
**cansole**
| bekmuhammaddev |
1,897,412 | React Video Playback Made Easy: Unleash the Power of the New MVP VideoPlayer Component | Introducing the VideoPlayer Component: A Powerful and Customizable Video Playback Solution... | 0 | 2024-06-23T00:45:28 | https://dev.to/victor_ajadi_21b5913f79f6/react-video-playback-made-easy-unleash-the-power-of-the-videoplayer-component-3fo7 | react, programming, webdev, javascript | ## Introducing the VideoPlayer Component: A Powerful and Customizable Video Playback Solution for React with Keyboard Navigation
**Empowering Your React Applications with Enhanced Video Playback**
This project introduces the VideoPlayer component, a robust and configurable video playback solution designed specifically for React applications. It goes beyond basic video display, offering a rich set of features that elevate the user experience and cater to diverse project needs, including built-in keyboard navigation for accessibility.
**Key Features and Benefits:**
- **Seamless Integration**: Leverages the power of React for effortless incorporation into your application's UI.
- **Interactive Controls**: Provides a wide range of built-in controls, including play/pause, speed adjustment (if supported by the video format), full screen, theater mode, picture-in-picture, caption support, and keyboard navigation.
- **Customization Flexibility**: Empowers developers to tailor the player's functionality by enabling or disabling specific controls as needed.
- **Streamlined Configuration**: Simplifies player setup through intuitive props that control various behaviors.
- **Subtitle Support**: Enhances accessibility and caters to multilingual audiences by allowing subtitle file upload in popular formats like .srt and .vtt.
- **Customizable Icons**: Offers the ability to inject custom SVG icons for backward and forward seek buttons for a cohesive visual experience.
- **Optional Features**: Provides flexibility with optional props like allowFrame for specifying iframe embedding and video preview on timeline hover.
- **Keyboard Navigation**: Supports essential keyboard shortcuts for play/pause, full screen, theater mode, mute, and seeking backward/forward using arrow keys or specific letters (e.g., "j", "l").
**Comparison with Other React Video Players:**
Several React video player libraries exist, each with its strengths and weaknesses. Here's a brief comparison with a few popular options:
- **React Player**: Offers a wide range of features, including quality selection, autoplay, and custom controls, but might have a steeper learning curve.
- **Video-React**: A lightweight and customizable library with good documentation, but may lack some advanced features like picture-in-picture.
- `VideoPlayer` **(This Library)**: Provides a good balance of features and ease of use, with built-in navigation, subtitle support, and optional iframe embedding. However, it currently doesn't offer functionalities like quality selection or auto-generated captions.
The best choice for your project depends on your specific requirements and priorities. Consider factors like feature set, ease of use, and community support when making your decision.
**Installation and Usage:**
To install the VideoPlayer library in your React project, use npm:
`npm install lib-react-youtube-player`
**Basic Usage Example:**
The following code snippet showcases a basic implementation of the `VideoPlayer` component within a React application:
```
// Import VideoPlayer from the library
import { VideoPlayer } from 'lib-react-youtube-player';
// Import the video file
import videoFile from './assets/video/Learn useRef in 11 Minutes.mp4';
function App() {
return (
<div className="App">
{/* Render the VideoPlayer component */}
<VideoPlayer
speedbtnProp={true} // Enable speed control button
fullscreenProp={true} // Enable full screen button
theaterProp={true} // Enable theater mode button
pipProp={true} // Enable picture-in-picture button
captionbtnProp // Enable caption/subtitle button
backwardBtn={false} // Disable backward seek button
forwardBtn={false} // Disable forward seek button
videoFile={videoFile} // Specify the video file path
allowFrame={true} // Enable iframe embedding (optional)
LeftBackwardSvgIcon={() => { // Provide custom backward seek SVG here }}
RightForwardSvgIcon={() => { // Provide custom forward seek SVG here }}
subtitleFile={'./assets/srt/Learn useRef in 11 Minutes.srt'} // Default subtitle file (optional)
/>
</div>
);
}
export default App;
```
**Explanation:**
**Import Statements:** We import the VideoPlayer component from the `'lib-react-youtube-player'` library and the video file (Learn useRef in 11 Minutes.mp4) using import statements.
**App Component:** The App function is the main component of our React application.
**Rendering the VideoPlayer:** Inside the App component's JSX, we render the VideoPlayer component.
**Configuring Props:** We configure the VideoPlayer component using various props to enable or disable specific controls, specify the video file, and activate optional features like iframe embedding.
We encourage you to explore the `VideoPlayer` component further and consider incorporating it into your React projects. If you have any questions or feedback, feel free to reach out to us via email at [victorajadi2004@gmail.com](url) or connect with us on LinkedIn [www.https://www.linkedin.com/in/zemon-dev/](url).
**Mimicking YouTube Functionality:**
The `VideoPlayer` component aims to offer a similar user experience to YouTube in several aspects, including:
- Play/Pause functionality with keyboard shortcuts (spacebar or "k").
- Full screen mode toggle with keyboard shortcut ("f").
- Theater mode toggle with keyboard shortcut ("t").
- Mute toggle with keyboard shortcut ("m").
- Seeking backward and forward using arrow keys or specific letters ("j" for 5 seconds backward, "l" for 5 seconds forward).
- Subtitle support through user-uploaded .srt and .vtt files, activated by the caption button.
**Iframe Preview (Optional):**
The `VideoPlayer` offers the optional `allowFrame` prop, which enables you to embed the video within an iframe. This can be useful for providing a preview image on the timeline when hovering, similar to YouTube's functionality.
**Limitations:**
- Currently, the library doesn't support video quality selection, unlike YouTube.
- It relies on user-uploaded subtitle files and doesn't offer auto-generated captions like YouTube.
We're continuously improving the `VideoPlayer` component, and these features might be added in future updates.
The `VideoPlayer` component provides a versatile and user-friendly solution for video playback in your React applications. Its intuitive design, keyboard navigation accessibility, and customizable features make it a valuable asset in your development toolkit. Explore the component further to personalize video experiences and enhance your React projects. | victor_ajadi_21b5913f79f6 |
1,897,411 | Comprehensive Guide to HTMX: Building Dynamic Web Applications with Ease | In the ever-evolving world of web development, creating dynamic and interactive web applications has... | 0 | 2024-06-23T00:42:11 | https://devtoys.io/2024/06/22/comprehensive-guide-to-htmx-building-dynamic-web-applications-with-ease/ | webdev, htmx, html, devtoys | ---
canonical_url: https://devtoys.io/2024/06/22/comprehensive-guide-to-htmx-building-dynamic-web-applications-with-ease/
---
In the ever-evolving world of web development, creating dynamic and interactive web applications has become a necessity. Traditional methods involving JavaScript frameworks can be complex and cumbersome. Enter HTMX – a powerful library that simplifies adding interactivity to your web applications. In this comprehensive tutorial, we’ll delve into the essentials of HTMX and guide you through building a dynamic web application step-by-step.
```
Table of Contents
- Introduction to HTMX
- Setting Up Your Environment
- Basic HTMX Concepts
- Building a Simple Web Application
- Advanced Features
- Best Practices
- Conclusion
```
## 1. Introduction to HTMX – web development with HTMX
HTMX is a lightweight JavaScript library that allows you to extend HTML with attributes to create dynamic and interactive web applications without writing extensive JavaScript code. It enhances your HTML by enabling server-driven interactions, making your web development process more straightforward and efficient.
**Key Features of HTMX:**
- Supports AJAX requests with simple HTML attributes
- Allows server-side rendering of partials
- Integrates seamlessly with existing HTML
- Enables real-time updates with WebSockets
- Supports history management and swapping content dynamically
---
## 2. Setting Up Your Environment – web development with HTMX
Before we dive into coding, let’s set up our development environment.
**Prerequisites**
- Basic understanding of HTML and CSS
- A code editor (e.g., VS Code)
- A web server (e.g., XAMPP, MAMP, or a simple Python HTTP server)
## Installation
You can include HTMX in your project by adding the following CDN link to your HTML file:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>HTMX Tutorial</title>
<script src="https://unpkg.com/htmx.org@1.8.4"></script>
</head>
<body>
<!-- Your content here -->
</body>
</html>
```
**Alternatively, you can download HTMX and host it locally in your project.**
---
## 3. Basic HTMX Concepts – web development with HTMX
HTMX extends HTML with several powerful attributes that make it easy to add interactivity. Let’s explore some of the core concepts:
## hx-get
The hx-get attribute triggers an AJAX GET request when an event occurs (e.g., a click).
```html
<button hx-get="/example" hx-target="#result">Load Content</button>
<div id="result"></div>
```
## hx-post
The hx-post attribute triggers an AJAX POST request.
```html
<form hx-post="/submit" hx-target="#result">
<input type="text" name="data" required>
<button type="submit">Submit</button>
</form>
<div id="result"></div>
```
## hx-target
The hx-target attribute specifies the element where the response will be rendered.
## hx-trigger
The hx-trigger attribute defines the event that triggers the request.
```html
<input hx-trigger="keyup changed delay:500ms" hx-get="/suggestions" hx-target="#suggestions">
<div id="suggestions"></div>
```
## hx-swap
The hx-swap attribute determines how the response content is swapped into the target element.
```html
<button hx-get="/example" hx-target="#result" hx-swap="outerHTML">Replace Content</button>
<div id="result">Original Content</div>
```
## 👀 Read the full tutorial here! ===> (
Comprehensive Guide to HTMX: Building Dynamic Web Applications with Ease
- DevToys.io)[https://devtoys.io/2024/06/22/comprehensive-guide-to-htmx-building-dynamic-web-applications-with-ease/] | 3a5abi |
1,897,408 | Building a Cryptocurrency Trading Bot with Python | Introduction Cryptocurrency trading has become a popular form of investment in recent... | 0 | 2024-06-23T00:35:29 | https://dev.to/kartikmehta8/building-a-cryptocurrency-trading-bot-with-python-1n8b | webdev, javascript, beginners, programming | ## Introduction
Cryptocurrency trading has become a popular form of investment in recent years, and with the rise of automation in financial markets, many traders are turning to trading bots to aid in their decision making. In this article, we will discuss how to build a cryptocurrency trading bot using Python, one of the most popular programming languages for data analysis and automation.
## Advantages of Using a Trading Bot
1. **Operational Continuity:** One of the main advantages of using a trading bot is that it can operate 24/7, unlike human traders who need rest and cannot monitor the market at all times. This allows for quick decision-making and execution of trades, without missing any potential opportunities.
2. **Emotion-Free Trading:** Trading bots eliminate emotional decision-making, which can often lead to costly mistakes. By relying on pre-set rules and algorithms, bots can maintain a consistent trading strategy.
## Disadvantages of Trading Bots
1. **Potential for Errors:** However, it is important to note that trading bots are not foolproof and can still make errors, especially if not properly configured.
2. **Technical Knowledge Required:** They also require a certain level of technical knowledge to set up and maintain, which may be a barrier for some traders.
3. **Limited Adaptability:** Another challenge is that bots can only operate based on the parameters and rules set by the user, so they may struggle to adapt to unexpected market conditions.
## Features of a Cryptocurrency Trading Bot
There are various features that can be incorporated into a trading bot, such as technical indicators, risk management strategies, and automatic portfolio rebalancing. Using Python, these features can be customized and fine-tuned to suit the individual trader's needs and preferences.
### Example of Implementing a Simple Moving Average (SMA) in Python
```python
import pandas as pd
import numpy as np
# Function to calculate the Simple Moving Average
def calculate_sma(data, window_size):
sma = data['close'].rolling(window=window_size).mean()
return sma
# Example DataFrame
data = pd.DataFrame({
'close': np.random.random(100) * 1000 # Random closing prices
})
# Calculate 20-day SMA
sma_20 = calculate_sma(data, 20)
print(sma_20)
```
## Conclusion
Building a cryptocurrency trading bot with Python can provide various benefits, such as increased efficiency, reduced emotional decision making, and customizable features. However, it is important to carefully consider the risks and limitations as well. With proper planning and implementation, a trading bot can be a valuable tool for cryptocurrency traders. | kartikmehta8 |
1,897,406 | We all operate at four altitudes… | Success isn't just about doing more and moving faster. Providing optimal value in your discipline... | 0 | 2024-06-23T00:29:28 | https://dev.to/horaceshmorace/we-all-operate-at-four-altitudes-5e1n | professionaldevelopment, leadershipdevelopment, optimization | ---
title: We all operate at four altitudes…
published: true
description:
tags: professionaldevelopment, leadershipdevelopment, optimization
# cover_image:
# Use a ratio of 100:42 for best results.
# published_at: 2024-06-23 00:11 +0000
---
Success isn't just about doing more and moving faster. Providing optimal value in your discipline is about focusing your time and effort on the right things in the right amounts for your organizational or career level. This means operating effectively within different contexts. I like to visualize these contexts as “altitudes’’ that we need to shift between throughout our day. From lowest-level to highest: the technical, the tactical, the strategic, and the political. These altitudes are not skill sets, but contexts to which we allocate our time and effort, and understanding the proportions in which we should focus on each one is key to:
1. Providing the exact right value at your organizational or career level.
2. Understanding the exact right value to expect from subordinates, and to coach them to achieve it.
3. Understanding how to show that you’re ready for a promotion, and how your role changes when you do.
### The Technical
At the lowest level, the Technical, we are performing hands-on tasks. This should not be confused with “tech” or “technology,” but rather should be associated with working to generate some sort of deliverable, whether it be a project requirements document (PRD) for a Product Manager, an organization roadmap for a Program Manager, or a Software Developer coding a new feature. All disciplines have a “technical” level. This altitude is about output, or creating something of value to the delivery process.
### The Tactical
The next higher level, the Tactical, concerns itself with the orchestration of one or more work streams (e.g., one or more people working on an effort) and their dependencies. In software development, this will involve everything from refining a backlog, planning and executing a sprint, various levels of quality testing, all the way to deploying a new release to the user. In book publishing, this might involve editing a manuscript, typesetting, cover design, all the way to distribution. This altitude is about delivery, or coordinating collective processes and resources to optimally deliver value.
### The Strategic
At the penultimate level, the Strategic, we systematically determine goals and develop comprehensive plans aligned with those goals. While the lower two levels are about how and the “why of the how,” the Strategic is about what and the “why of the what.” That “why” will usually include business analytics, marketing research, user experience research, and the well-informed assumptions born of deep experience. This altitude is about achievement, or determining the optimal path to achieving business objectives.
### The Political
It’s a professionally immature attitude to “hate corporate politics,” associating it only with its worst expression: some selfish and underhanded games we must play in order to succeed. Intention is important, and at its best, the Political is about an appreciation that we all have our own goals or interpret corporate goals according to our own biases, but it behooves us to align our goals with those of others in a way that benefits us all, especially within an organization. This altitude is about synergy, or building relationships through respect, establishing common ground, and working toward greater benefit.
### Changing Altitudes
The different organizational levels (or ranks) within the same discipline should allocate their time across these four altitudes according to their responsibilities and expertise. For instance, a senior software developer might spend most of their time on technical tasks while contributing a finite amount of time to tactical planning (typically through Scrum events), but will engage in strategic planning and political networking minimally. Conversely, a CTO will primarily operate at the strategic and political levels, rarely (if ever in an enterprise environment) dropping into the tactical or technical.
Now, not everyone will agree with the distributions here. All maps are generalizations of the terrain, most are subjective, and by their very nature none are perfect. As with recipes, you should _salt and pepper to taste_. What's important is that there **_are_** distributions. Different roles need to operate more or less in different contexts. Leaders, in particular, typically have to learn to adeptly change altitudes in order to “face the fight where it happens,” context switching as needed. This is particularly true in smaller companies or startups where senior leadership might need to be more hands-on, or in enterprises in which a leader might need to cover for the lack of competence of more junior leaders. A leader might have to dive into the tactical and even technical details just to get sh… things done. For instance, a startup’s technical founder/co-founder might distribute her time initially with focus primarily on the technical and strategic altitudes. Or a VP with an underperforming Director might need to descend into the Tactical a bit more often to mitigate missing competencies and coach the Director and his direct reports in proper delivery.
### You’re the pilot.
Mastering the art of operating at different altitudes and understanding the degree to which you dedicate your time and energies to each is key to maximizing your value to your superiors, your organization, and your users, customers, or clients. By understanding when and how to shift between technical, tactical, strategic, and political levels, you can optimize your performance and lead your team more effectively. Embrace the fluidity required to navigate these altitudes, and you can not only elevate your own career but also contribute to the overall success of your organization, especially those you lead. Pull up when you can, dive when you need, and don’t forget to "_kick the tires and light the fires_".
| horaceshmorace |
1,897,405 | How to Deploy Applications Using Tomcat on a Web Server | Deploying applications using Apache Tomcat is a staple in the Java development world. Tomcat, an... | 0 | 2024-06-23T00:24:08 | https://dev.to/iaadidev/how-to-deploy-applications-using-tomcat-on-a-web-server-2d5n | tomcat, webdev, deployment, beginners |
Deploying applications using Apache Tomcat is a staple in the Java development world. Tomcat, an open-source implementation of Java Servlet, JavaServer Pages, and Java Expression Language technologies, provides a robust platform for running your Java applications. In this blog, we'll walk you through the process of deploying a web application using Tomcat, covering installation, configuration, deployment, and some troubleshooting tips.
### Table of Contents
1. Introduction to Tomcat
2. Prerequisites
3. Installing Tomcat
4. Configuring Tomcat
5. Deploying a Web Application
6. Accessing the Deployed Application
7. Managing Applications with Tomcat Manager
8. Automating Deployment
9. Troubleshooting Tips
10. Conclusion
### 1. Introduction to Tomcat
Apache Tomcat is a widely-used web server and servlet container that provides a "pure Java" HTTP web server environment for Java code to run in. Tomcat is typically used to run Java Servlets and JavaServer Pages (JSP), which are often utilized to create dynamic web content.
### 2. Prerequisites
Before you begin, ensure you have the following:
- JDK (Java Development Kit) installed on your machine.
- Apache Tomcat downloaded.
- A web application (a WAR file) ready to deploy.
### 3. Installing Tomcat
#### Step 1: Download Tomcat
First, download the latest version of Tomcat from the [official Apache Tomcat website](http://tomcat.apache.org/). Choose the version that suits your needs, typically the latest stable release.
#### Step 2: Extract the Archive
After downloading, extract the Tomcat archive to a directory of your choice. For example:
```bash
tar -xvf apache-tomcat-9.0.58.tar.gz
mv apache-tomcat-9.0.58 /usr/local/tomcat9
```
#### Step 3: Set Environment Variables
Set the `CATALINA_HOME` environment variable to the Tomcat installation directory. Add the following lines to your `.bashrc` or `.bash_profile`:
```bash
export CATALINA_HOME=/usr/local/tomcat9
export PATH=$CATALINA_HOME/bin:$PATH
```
Apply the changes:
```bash
source ~/.bashrc
```
### 4. Configuring Tomcat
#### Step 1: Configuration Files
Tomcat configuration files are located in the `conf` directory under your Tomcat installation directory. The primary configuration files include:
- `server.xml`: Main configuration file for Tomcat.
- `web.xml`: Default web application deployment descriptor.
- `context.xml`: Default Context elements.
#### Step 2: Modify `server.xml`
The `server.xml` file configures the core server settings. A typical setup might look like this:
```xml
<Server port="8005" shutdown="SHUTDOWN">
<Service name="Catalina">
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Engine name="Catalina" defaultHost="localhost">
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Context path="" docBase="/path/to/your/app" />
</Host>
</Engine>
</Service>
</Server>
```
### 5. Deploying a Web Application
#### Step 1: Preparing the WAR File
Ensure your web application is packaged as a WAR (Web Application Archive) file. The WAR file should contain all the necessary Java classes, libraries, and resources for your application.
#### Step 2: Deploy the WAR File
There are several ways to deploy a WAR file to Tomcat:
1. **Manual Deployment**: Copy the WAR file to the `webapps` directory.
```bash
cp /path/to/yourapp.war $CATALINA_HOME/webapps/
```
2. **Using Tomcat Manager**: Tomcat includes a web-based application manager that allows you to upload and deploy WAR files through a web interface.
3. **Automated Deployment**: Configure Tomcat to automatically deploy applications by placing them in the `webapps` directory.
### 6. Accessing the Deployed Application
Once deployed, you can access your application through a web browser. If Tomcat is running on `localhost` and using the default port `8080`, and your application is named `yourapp`, you would access it at:
```
http://localhost:8080/yourapp
```
### 7. Managing Applications with Tomcat Manager
Tomcat provides a web-based manager that allows you to manage your web applications. To access the Tomcat Manager:
1. Open a web browser and navigate to:
```
http://localhost:8080/manager/html
```
2. Log in with the Tomcat manager credentials. By default, the manager role is not assigned to any user. You need to add a user with the `manager-gui` role in the `tomcat-users.xml` file located in the `conf` directory:
```xml
<role rolename="manager-gui"/>
<user username="admin" password="admin" roles="manager-gui"/>
```
3. Restart Tomcat for the changes to take effect:
```bash
$CATALINA_HOME/bin/shutdown.sh
$CATALINA_HOME/bin/startup.sh
```
### 8. Automating Deployment
For continuous integration and deployment (CI/CD), you can automate the deployment process using tools like Jenkins, GitHub Actions, or GitLab CI. A typical Jenkins pipeline might look like this:
```groovy
pipeline {
agent any
stages {
stage('Build') {
steps {
sh 'mvn clean package'
}
}
stage('Deploy') {
steps {
sh '''
cp target/yourapp.war $CATALINA_HOME/webapps/
$CATALINA_HOME/bin/shutdown.sh
$CATALINA_HOME/bin/startup.sh
'''
}
}
}
}
```
### 9. Troubleshooting Tips
- **Logs**: Check the Tomcat logs located in the `logs` directory. The `catalina.out` file is especially useful for debugging startup issues.
- **Permissions**: Ensure that the user running Tomcat has the necessary permissions to read/write the web application files.
- **Port Conflicts**: Ensure that the ports configured in `server.xml` are not being used by other applications.
- **Memory Issues**: Adjust the JVM memory settings in the `setenv.sh` (or `setenv.bat` on Windows) file:
```bash
export JAVA_OPTS="-Xms512m -Xmx1024m"
```
### 10. Conclusion
Deploying a web application using Tomcat involves several steps, from installation and configuration to deployment and management. By following this guide, you should be able to set up a Tomcat server, deploy your applications, and manage them effectively. Remember to refer to the official [Apache Tomcat documentation](https://tomcat.apache.org/tomcat-9.0-doc/) for more detailed information and advanced configurations. Happy deploying!
---
Feel free to comment below if you have any questions or run into any issues. Happy coding! | iaadidev |
1,901,823 | Deadlocks in Go: Understanding and Preventing for Production Stability | fatal error: all goroutines are asleep - deadlock! Enter fullscreen mode Exit... | 0 | 2024-06-26T21:10:49 | https://medium.com/@kstntn.lsnk/deadlocks-in-go-understanding-and-preventing-for-production-stability-6084e35050b1 | golangtutorial, golangdevelopment, go | ---
title: Deadlocks in Go: Understanding and Preventing for Production Stability
published: true
date: 2024-06-23 00:21:30 UTC
tags: golangtutorial,golangdevelopment,go,golang
canonical_url: https://medium.com/@kstntn.lsnk/deadlocks-in-go-understanding-and-preventing-for-production-stability-6084e35050b1
---
```
fatal error: all goroutines are asleep - deadlock!
```
> Damn, not again! 💀
Yes, that’s often the reaction if you’re not aware of all possible deadlocks that might happen.
This article will help you prevent all possible deadlocks and understand their nature.
### Introduction
Deadlocks in Go can cause your program to become unresponsive, leading to poor user experiences and potentially costly downtime. Even more, the Go compiler **will NOT warn you** about these issues because deadlocks are a runtime phenomenon, not a compile-time error. This means that your code might compile and pass initial tests, only to fail under specific conditions in a production environment.
### **Understanding Deadlocks**
Deadlocks happen when a task gets stuck waiting for something that **will never happen** , causing it to stop moving forward.
This principle forms the foundation of your coding approach. Always inquire:
> _- Will someone write something into the channel I’ve created?_
Similarly, consider:
> _- Am I trying to write to a channel without space?_
Also:
> _- Am I attempting to read from a channel that is currently empty?_
In other words:
- to store something, you need a **place ready to receive ** it;
- to read something, you must ensure there’s something **available to be read** ;
- to lock something, you must **verify it’s free** and will be released when needed.
### **Deadlock types**
All possible cases might be grouped into the next two groups:
- Channel misuse
- Circular dependencies between goroutines
Let’s consider them in more detail.
#### **Channel Misuse**
Using channels incorrectly, like reading from an empty channel or writing to a full one, can make goroutines wait forever, causing deadlock. Let’s delve into and discuss all possible types within this category.
**No receiver deadlock**
It occurs when a goroutine attempts to send data to an **unbuffered** channel, but there is no corresponding receiver ready to receive that data.
```
package main
func main() {
// Create an unbuffered channel of integers
goChannel := make(chan int)
// Attempt to send the value 1 into the channel
// This operation will block indefinitely because there's no receiver
// ready to receive the value
goChannel <- 1
}
```
This occurs specifically with unbuffered channels due to their **lack of storage space**. The same code with a buffered channel won’t have deadlock.
Got it! Let’s add a receiver and make it work:
```
package main
import "fmt"
func main() {
goChannel := make(chan int)
goChannel <- 1
// Attempt to read the value from the channel
fmt.Println(<-goChannel)
}
```
Wait… What? Why does it still throw deadlock? 😡
This is because channels **aim to synchronize** two or more goroutines. And if one writes to the channel, there should be another goroutine that reads from the channel. Let’s fix it:
```
package main
import (
"fmt"
"time"
)
func main() {
goChannel := make(chan int)
goChannel <- 1
go func() {
// Attempt to read from the channel
fmt.Println(<-goChannel)
}()
// Waiting for the goroutine to be executed
time.Sleep(2 * time.Second)
}
```
Wait! Why still? 🤬
Because, before putting value we need to make sure it will be received and **reading must be called before writing**. Let’s switch places of read and write calls:
```
package main
import (
"fmt"
"time"
)
func main() {
goChannel := make(chan int)
// Start reading from the channel
go func() {
// Attempt to read from the channel
fmt.Println(<-goChannel)
}()
// Start writing to channel
goChannel <- 1
// Waiting for the goroutine to be executed
time.Sleep(2 * time.Second)
}
```
Yeah, finally it works. 🥳
This rule doesn’t apply to buffered channels since they have a **place to store value** and one goroutine might handle both actions — read and write. The following code that previously didn’t work with unbuffered channel works now:
```
package main
import (
"fmt"
)
func main() {
// Define buffered channel
goChannel := make(chan string, 1)
// Attempt to write to the channel
goChannel <- "hey!"
// Attempt to read from the channel
fmt.Println(<-goChannel)
}
```
**No sender deadlock**
It occurs when a goroutine tries to read data from a channel, but **no value will ever be sent** :
```
package main
func main() {
// Create a channel of integers
goChannel := make(chan int)
// Attempt to read a value from the channel
// This operation will block indefinitely because there's no value
// previously sent
<- goChannel
}
```
This logic applies to both buffered and unbuffered channels.
**Writing to a Full Channel**
A deadlock can occur when a goroutine attempts to write to a buffered channel that is already full, and **no other goroutine is available to read** from the channel. This leads to the write operation **blocking indefinitely** , causing deadlock:
```
package main
import "fmt"
func main() {
// Create a buffered channel with a capacity of 1
ch := make(chan int, 1)
// Send a value into the channel
ch <- 1
// Attempt to send another value into the channel
// This will block because the channel is full and there's no receiver or place to store value
ch <- 2
fmt.Println("This line will never be printed")
}
```
**Reading from an Empty Channel**
Another case is when a goroutine attempts to read from an already **emptied channel** , resulting in the read operation blocking indefinitely:
```
package main
import "fmt"
func main() {
// Create a buffered channel with a capacity of 1
ch := make(chan string, 1)
// Send a value into the channel
ch <- "first"
// Attempt to read the value (will be printed)
fmt.Println(<-ch)
// Attempt to read the value again (will fail)
fmt.Println(<-ch)
}
```
**Unclosed Channel Before Range**
The following code demonstrates one of the most common deadlocks that happens to developers when a goroutine iterates over a channel using a for-range loop, but the **channel is never closed**. The for-range loop requires the channel to be closed to **terminate iteration**. If the channel is not closed, the loop will block indefinitely, leading to a deadlock. Try to run with commented and uncommented **_close(ch)_**:
```
package main
import "fmt"
func main() {
// Create a buffered channel
ch := make(chan int, 2)
// Send some values into the channel
ch <- 1
ch <- 2
// Close the channel to prevent deadlock
// close(ch) // This line is intentionally commented out
// to demonstrate deadlock
// Iterate over the channel using a for-range loop
for val := range ch {
fmt.Println(val)
}
fmt.Println("This line will be printed only if the channel was closed")
}
```
Don’t leave channels opened 🫢
#### **Circular dependencies between goroutines**
Circular dependencies between goroutines occur when multiple goroutines are **waiting on each other** to perform actions or exchange data, creating a situation where none of them can proceed without the others’ participation, leading to a deadlock.
Correct managing dependencies between goroutines is crucial to prevent the mentioned deadlocks-situations. Let’s discuss the most common cases.
**Mutex and Locking Issues**
If one goroutine locks resource A first and then waits to lock resource B, while another goroutine locks resource B first and then waits to lock resource A, a deadlock can occur if **both goroutines end up waiting indefinitely** for each other to release their locks.
Try the following example:
```
package main
import (
"fmt"
"sync"
"time"
)
func main() {
// Declare two mutexes
var mu1, mu2 sync.Mutex
var wg sync.WaitGroup
wg.Add(2)
// Goroutine 1
go func() {
defer wg.Done()
mu1.Lock()
// Simulate some work or delay
time.Sleep(1 * time.Second)
mu2.Lock()
mu2.Unlock()
mu1.Unlock()
fmt.Println("Goroutine 1: Unlocked")
}()
// Goroutine 2
go func() {
defer wg.Done()
mu2.Lock()
// Simulate some work or delay
time.Sleep(1 * time.Second)
mu1.Lock()
mu1.Unlock()
mu2.Unlock()
fmt.Println("Goroutine 2: Unlocked")
}()
// Wait for all goroutines to finish
wg.Wait()
}
```
To prevent such deadlocks in Go, ensure that goroutines acquire locks in a **consistent and mutually agreed order**. This prevents situations where one goroutine is waiting for a lock held by another goroutine, which is also waiting for a lock held by the first goroutine.
**Deadlock Due to Misuse of WaitGroup**
Missing to call **_wg.Done()_** can cause other goroutines waiting on the WaitGroup to block indefinitely, assuming that all tasks have been completed:
```
package main
import (
"sync"
"time"
)
func main() {
var wg sync.WaitGroup
wg.Add(1)
go func() {
// Uncomment wg.Done below to make it work
// defer wg.Done()
// Simulating some work
time.Sleep(1 * time.Second)
}()
wg.Wait()
// This would deadlock if wg.Done() was missing.
}
```
Make sure to always use **_wg.Done()_** when using _sync.WaitGroup_ to properly signal the completion of goroutines and avoid the deadlock.
### **Conclusion**
By implementing these best practices and understanding the scenarios that lead to deadlocks, you can significantly reduce the risk of encountering them in your Go programs.
Consider using this checklist when developing your program in Golang:
❗ Channel: Ensure no receiver or sender deadlock.
❗ Channel: Avoid writing to a full channel or reading from an empty one.
❗ Channel: Always close before using **_range_**.
❗ Mutex: Prevent deadlocks by managing locking order.
❗ WaitGroup: Use wg.Done() correctly to avoid blocking.
Keep coding efficiently and watch out for those sneaky deadlocks! 🐈⬛ | kostiantyn_lysenko_5a13a9 |
1,897,400 | Modular Next.js Folder Strategy | Intro Organizing your structure folder in Next.js is key to maintain a scalable and... | 0 | 2024-06-23T00:10:18 | https://dev.to/trisogene/modular-nextjs-folder-strategy-5dhe | nextjs, cleancode, react, designpatterns | ## Intro
Organizing your structure folder in Next.js is key to maintain a scalable and maintenable project, today i am gonna share one of the approach i use with Next.js page router.
## ⚙️ Part 0 - Next.js Configuration
This article use a custom folder that require you to change Next.js configuration, modify this line in the `next.config.mjs` file
```js
const nextConfig = {
pageExtensions: ["page.tsx"],
...
}
```
## 🔄 Part 1 - Reusable vs Dedicated Components
The first thing we want to do is divide our project between generic Reusable component and dedicated components.
A reusable component is a component that can be used anywhere (for example the `ReloadButton.tsx`) while a dedicated component is a component that is relative so a specific page (for example the `AboutMeHeader.tsx` or the `AboutMeBody.tsx`)
```
├── components/
│ └── ReloadButton/
│ └── ReloadButton.tsx
└── pages/
└── about-me/
├── components/
│ ├── AboutMeHeader/
│ │ └── AboutMeHeader.tsx
│ └── AboutMeBody/
│ └── AboutMeBody.tsx
└── index.png
```
## 🧩 Part 2 - Component Structure Breakdown
For a better structure we want to divide a component into 5 parts: main, logic, style, configuration and types.
Let's see an example for a button that handle async requests
ReloadButton/
├── ReloadButton.tsx
├── ReloadButton.style.tsx
├── ReloadButton.conf.tsx
├── ReloadButton.d.tsx
└── useReloadButton.tsx
### Main - `ReloadButton.tsx`
This main component serve as a connector for all the other components.
```js
import React from "react";
import { Button } from "./ReloadButton.style";
import useReloadButton from "./useReloadButton";
import { ReloadButtonProps } from "./ReloadButton.d";
import { buttonConfig } from "./ReloadButton.conf.tsx";
const ReloadButton = ({ message, onClick }: ReloadButtonProps) => {
const { isReloading, handleReload } = useReloadButton({ onClick });
return (
<Button onClick={handleReload} disabled={isReloading}>
{isReloading ? buttonConfig.loadingText : message}
</Button>
);
};
```
### Style - `ReloadButton.style.tsx`
The style component isolate the style of this component, it can contains the style of child components in order to isolate all the style of a single component in one single file.
We can expose some variable to ReloadButton.conf in order for them to be more easy to be configurated
```js
import styled from "styled-components";
import { buttonConfig } from "./ReloadButton.conf";
export const Button = styled.button`
padding: 10px 20px;
background-color: ${buttonConfig.backgroundColor};
color: white;
border: none;
border-radius: 5px;
cursor: pointer;
font-size: 16px;
&:hover {
background-color: ${buttonConfig.hoverColor};
}
`;
```
### Logic - `useReloadButton.tsx`
This logic component contain all the states and function of the ReloadButton
While it's possible for the useReloadButton to contain also the logic of child component it's important to note that if u have a useState inside your useReloadButton there will be two different state (one for each component with the useReloadButton), consider solutions with Context or Redux for sharing customHooks between components.
```js
import { useState } from "react";
import { UseReloadButtonProps } from "./ReloadButton.d";
const useReloadButton = ({ onClick }: UseReloadButtonProps) => {
const [isReloading, setIsReloading] = useState(false);
const handleReload = async () => {
setIsReloading(true);
await onClick();
setIsReloading(false);
};
return {
isReloading,
handleReload,
};
};
export default useReloadButton;
```
### Type - `ReloadButton.d.tsx`
Type is used to store all the types of the component
```js
export interface ReloadButtonProps {
message: string;
onClick: () => Promise<void>;
}
export interface UseReloadButtonProps {
onClick: () => Promise<void>;
}
```
### Config - `ReloadButton.conf.tsx`
Config is used to store all the constants and static configurations of the component
```js
export const buttonConfig = {
loadingText: "Reloading...",
backgroundColor: "#0070f3",
hoverColor: "#005bb5",
};
```
## 💡 Part 3 - Example of usage
```js
import React from "react";
import ReloadButton from "@/components/ReloadButton";
const App = () => {
const handleReloadClick = async () => {
await new Promise((resolve) => setTimeout(resolve, 2000));
console.log("API call completed");
};
return (
<div>
<h1>Example App</h1>
<ReloadButton message="Reload Data" onClick={handleReloadClick} />
</div>
);
};
export default App;
```
## 📌 Part 4 - Conclusion
While this component could be considered overengineered, it's important to understand the structure in order to avoid having 2000 line files in bigger components!
One of the benefits of this solutions is improved search ,just search for your component name in vscode using CRTL + P or search for something like .style to search for all the styles around your application.
Thank you for reading this ,this was my first article and i hope you enjoyed :D
| trisogene |
1,897,396 | Deploy laravel project on vercel | hello everyone I have an error when deploying the laravel project on vercel the style does not work ... | 0 | 2024-06-22T23:57:10 | https://dev.to/prof_cisco_2a53d5af352521/deploy-laravel-project-on-vercel-195 | help | hello everyone I have an error when deploying the laravel project on vercel the style does not work I followed this site https://calebporzio.com/easy-free-serverless-laravel-with-vercel and I saw tutorials on youtube but it doesn't work
| prof_cisco_2a53d5af352521 |
1,897,395 | 🏞️ Hyde: The Most Aesthetic, Dynamic, and Minimal Dots for Hyprland on Arch | Are you looking for a way to spruce up your Hyprland window manager on Arch Linux? Look no further... | 0 | 2024-06-22T23:50:18 | https://dev.to/da4ndo/hyde-the-most-aesthetic-dynamic-and-minimal-dots-for-hyprland-on-arch-58c | archlinux, hyprland, hyde |
**Are you looking for a way to spruce up your Hyprland window manager on Arch Linux?** Look no further than Hyde! Hyde is a comprehensive configuration that provides a beautiful, dynamic, and minimal desktop environment.
## 📚 Why Choose Hyde?
Hyde offers a compelling set of features that elevate your Hyprland experience:
- **Effortless Setup**: Ditch the manual configuration hassle. Hyde boasts a convenient installation script that gets you up and running in minutes.
- **Unleash Your Inner Designer**: Hyde empowers you to personalize your desktop. With a vast array of themes, styles, and keybindings, you can craft a truly unique and functional workspace.
- **Essential Apps at Your Fingertips**: Hyde comes pre-configured with popular applications like a terminal emulator, file manager, and web browser. No more wasting time on individual installations.
- **[Hyde-Ext](https://github.com/Da4ndo/Hyde-Ext)**: Manage your Hyde setup with ease. Hyde-Ext simplifies tasks like installing pre-built configs, wallpapers, scripts, packages and restores configs after Hyde upgrade.
## 🌷 A Glimpse of Hyde's Beauty
Feast your eyes on some stunning examples of what Hyde can achieve:
---
## 🛠️ Getting Started with Hyde
Ready to experience the Hyde difference? Here's how to get started:
1. **Head to the Hyde GitHub Repository**: Follow the detailed instructions provided on the official Hyde repository: [https://github.com/prasanthrangan/hyprdots](https://github.com/prasanthrangan/hyprdots)
2. **Installation Made Easy**: Utilize the convenient installation script to streamline the setup process.
3. **Dive into Customization**: Once installed, explore the array of customization options. The Hyde documentation offers comprehensive guides on modifying themes, styles, and keybindings to perfectly suit your workflow.
## 🗺️ Beyond the Basics: Exploring Hyde's Potential
While this guide provides a starting point, Hyde offers much more to discover. Consider exploring these aspects to further personalize your experience:
- **Advanced Tiling Options**: Leverage Hyde's tiling capabilities to create a workspace that perfectly aligns with your multitasking needs.
- **Integration with Third-Party Tools**: Explore how to seamlessly integrate your favorite productivity tools with Hyde for a truly unified workflow.
- **Contributing to the Community**: Get involved with the Hyde community by sharing your configurations and contributing to the project's ongoing development.
With Hyde, the possibilities are endless. Unleash your creativity and craft a desktop environment that reflects your unique style and workflow.
## 🚀 Happy reading!
Feel free to leave your comments or questions below. If you found this project helpful, please share it with your peers and follow me for more web development tutorials. Happy reading!
**Follow and Subscribe**:
Website: [da4ndo.com](https://da4ndo.com)
Email: contact@da4ndo.com | da4ndo |
1,897,394 | From Burnout to Breakthrough: How I Transformed My Developer Workflow with One Simple Change | My Developer Burnout – It was 2 AM, and I was staring at my screen, feeling utterly defeated. Another... | 0 | 2024-06-22T23:46:29 | https://dev.to/3a5abi/from-burnout-to-breakthrough-how-i-transformed-my-developer-workflow-with-one-simple-change-401 | productivity, career, devtoys | My Developer Burnout – It was 2 AM, and I was staring at my screen, feeling utterly defeated. Another late night, another seemingly insurmountable bug, and the weight of endless deadlines. I love coding, but this constant grind was draining the life out of me.
According to a recent survey, over 70% of developers report experiencing burnout at some point in their careers. The pressure to meet deadlines, the rapid pace of technological change, and the constant demand for innovation can take a toll on even the most passionate coders.
As developers, we’re often faced with tight deadlines, complex problem-solving, and the need to constantly learn new technologies. These challenges can lead to long hours, high stress, and eventually, burnout. Personally, I found myself working late into the night, trying to squash bugs and meet deadlines, only to wake up exhausted and less productive the next day.
👀 Continue Reading! ===> [From Burnout to Breakthrough: How I Transformed My Developer Workflow with One Simple Change
](https://devtoys.io/2024/06/22/from-burnout-to-breakthrough-how-i-transformed-my-developer-workflow-with-one-simple-change/)
| 3a5abi |
1,897,392 | UMAI, a refreshing inspired by MithrilJS and HyperApp, library | One little thing I have always found annoying in Mithril is returning view methods in... | 27,885 | 2024-06-22T23:44:40 | https://dev.to/artydev/a-refreshing-inspired-mithriljs-library-1l2c | umai | One little thing I have always found annoying in Mithril is returning **view** methods in components.
[UmaiJS](https://github.com/kevinfiol/umai) is heavily inspired by MithrilJS, no views, no hooks, no signals.
Components can easily be refrenced.
For side projects, it is very nice.
```js
import { m, mount } from 'umai';
let count = 0;
const Counter = () => (
<div>
<div>Counter : {count}</div>
<button onclick={() => count++}>INC</button>
</div>
);
mount(document.body, Counter);
```
You can play with it here : [Demo](https://flems.io/#0=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-sdqHhRcFDsB7YJFYR6CR0UgodQ+KRQzx4HoCtRWJEpj6-U5ZPAoAE9JTlPBVOp6qIAMxWnD6AC6eiAA)
Here is demo of statefull components:
```js
const Counter = () => {
let count = 0;
return () =>
<div>
<div>Counter : {count}</div>
<button onclick={() => count++}>
INC
</button>
</div>
};
const App = () => (
<div>
{[...Array(5)].map(() => <Counter />)}
</div>
)
mount(document.body, App);
```
[Demo](https://flems.io/#0=N4IgtglgJlA2CmIBcB2AbAOgCwCYA0IAZhAgM7IDaoAdgIZiJIgYAWALmLCAQMYD21NvEHIQAYT4BXQfABO3EKXgIebCAPJMADKhABfPDXqNmAK3K8BQkUwD0AKnsACAALmAHk7BP7tgDrUEGAADnyybE7AXnheUoJOek6EsnzeAOSSYLQQaQDcAQH81KQREtJCsk4AvE4AFACU1QB8kQFOTggR-OXVTlr51O2y8GySsoMNzU5t7bMAPFAQAG5NM7PziytlMpVIkd2CenO2m6uD6-MARpJsbALtAjywEDwA1lXAk1UtB2wA1H89GcLhcAJIAOTEawux2utwEwJhJ2WZz0A0KGgiAEFgsF2jUvi1ajMFijoXNthUnLYWtNzu0KXEqTT2uTKXJqbS2UyOSy6QzkSsCtR6gEwEzalA+DxMsI2BhLnwoABPGI44L1XIKfghEhyUSXWiXZQKJQqNQaUQ4ADMSBwaAAtDotPpDCA6AxRBgeKQLCAitY2AalcrgFlZABzCDUJBYLTBTy0G58XJZdwOgDu0DYLCQaAArPH3LlntR4A6WPAIBH2EgAIwYNC5QhWB2kCAAL3g9YAHAncvxYGEkABiLDj3LBWgwaMRpBaJx1ot6RUqvBwu7UPDR4I3YAtwQOwj0EjKpDi6h8UhTnjwPTC1itc6D4dOYZQAJ6U3KeCqdTFURbTrHB9AAXT0IA)
Reference elements in UMAI :
```js
/** @jsx m */
import { m, mount, redraw } from 'umai';
let count = 0;
const MAX = 5
const qs = (elt) => (selector) => elt.querySelector(selector);
const bindClickEvt = (elt, handler) => elt.addEventListener("click", handler);
const incBy = (value) => () => count += value;
const ref_counter = (counter_elt) => {
const $ = qs(counter_elt);
const [binc, bdec, title] = [".inc", ".dec", ".title"].map($);
let setTitleColor = (color) => title.style.color = color;
bindClickEvt(binc, incBy(1));
bindClickEvt(bdec, incBy(-1));
bindClickEvt(counter_elt, () => {
count > MAX ? setTitleColor("blue") : setTitleColor("red");
redraw();
})
};
const Counter = () => (
<div dom={ref_counter}>
<div class="title">Counter : {count}</div>
<button class="inc">INC</button>
<button class="dec">DEC</button>
</div>
);
mount(document.body, Counter);
```
[demo](https://flems.io/#0=N4IgtglgJlA2CmIBcB2AbAOgCwCYA0IAZhAgM7IDaoAdgIZiJIgYAWALmLCAQMYD21NvEHIQAYT4BXQfABO3EKXgIebCAPJMADKhABfPDXqNmAK3K8BQkUwD0AKnsACAALmAHk7BP7tgDrUARBgAA58smxOwF54XlKCsbLwULK0AO5Oek6EsnzeAOSSYLQQ+QDcAQEIkfzSkQC8TloV1PzUpJEAsgCCABpOjQCsTpWtGpEAjqQDTgAUymwAlAMAfHNKKmzhy-VrCxgTknIAngDKyvCq4bMbl1uyiy1tHU4ARhDUUGKwEDwA1gBRABuDTmC1iLFonwQD1WTn2tBgwOEbAAMhAOsI5LM-CAeD9-riIVC4HJHgFnpEPjwAELHGazIG0WBHHZrWZspy1QROADUjSZLPgLScIzG7UiSUIAH1uUJZAy5XJpQtOcAAqKNVzxk4ACQzKazJWyFWwJYisWiylOCjvVqxV5QS6xNRsBAAXRmFFxGGpRJGzCdPH9PtdCFx7owxRCs115OomoTTmqTiUbAAKhA3fAJLBwoq+HnYbsnGH4BgOscEBh+EWZrXwhatXavgTASDZnaeLFqXTZgBGRbx0Ut76-dtsTtB2JOXvHWYAWkHw7eH1b4+Bk+NprYsQ5cPVSat8Uiax6-QA-Kn4Bmswhc9dca8hbjlkhr7fsw-ZDiQEkoK+Fqiv+qRpByFp6IsAR6C0FI6hIdRyAynI4kmAA8UAQECThQHk9TAFKsonnIegrFqooYVhXKwLQpCkPUuJlriKwITICrvsAcp6GhtiYUCZFHk4aGvJIbBbAm+K0fRuJ+iAKwAJIAHJiDxIliQIAmihRanidRUkMSAQbMQAIgCKm2DpGlajxfECfGARgCesy4TwRQohgrx8FAxyxKx8r2YE1AKPwoQkHIoivLQrzKAotyqOo7SiFgSD9lg+iGCAdAMKINZ0cFVgohFXnHMAxSyAA5h8SBYFoISeLQol8GUxTuAuaTQGwLBIGggy1e4ZQ-NQ8ALiw8AQOV7ApRgaBlIQVgLqQEAAF7wClAAcdVlA2shIAAxFgB1lCEiKYdQ5VIFoTj9n1eied5eCWdQeAfCEonAHNggLoQ9AkMcSCOdQfCkMdPDwHooyxRc8UaKIOAXfo7p6EAA)
Simulate fetching data :
articles.js
```js
/** @jsx m */
import { m, mount, redraw } from "umai";
function sleep(ms) {
return new Promise((res) => {
setTimeout(res, ms);
});
}
async function getArticles() {
await sleep(State.delay);
return ([
{ id: 1, title: "Titre1" },
{ id: 2, title: "Titre2" },
{ id: 3, title: "Titre3" },
]);
}
let State = {
articles: [],
delay: 2000,
};
function saveArticles (articles) {
State.articles = articles;
}
function clearArticles () {
State.articles = [];
redraw ();
}
async function fetchHN(node) {
let loader = node.querySelector(".loader");
loader.style.display = "block";
clearArticles ();
try {
let articles = await getArticles();
saveArticles(articles);
} catch (error) {
console.error("Failed to fetch articles:", error);
} finally {
loader.style.display = "none";
redraw();
}
}
const Articles = () => {
return (
<ul>
{State.articles.map((a) => (
<li>{a.title}</li>
))}
</ul>
)
}
const Timer = () => {
return (
<div>
<span>delay fetch for : </span>
<input
type="number"
value={State.delay}
oninput={(e) => {
State.delay = +e.target.value;
}}
/>
<span> ms</span>
</div>
)
}
const Loader = () => {
return (
<div class="loader" style="display:none">
Loading...
</div>
)
}
function setup(node) {
let btnLoader = node.querySelector("button");
btnLoader.style.display = 'block';
btnLoader.addEventListener("click", () => fetchHN(node));
}
const App = () => (
<div dom={setup}>
<Timer />
<button>Load Articles</button>
<Loader />
<Articles />
</div>
);
export { App };
```
main.js
```js
import { mount } from 'umai';
import { App } from './articles.js'
mount(document.body, App)
```
[DEMO](https://flems.io/#0=N4IgtglgJlA2CmIBcA2AzAOgAwE4A0IAzvAgMYAu8UyIAhgE7kSkKEYBWhIBAZhK8gDaoAHa0wiJCAwALcmFjcQpAPYjK6miAC+eUeMlFytShy4FV6+JqmXC5AAQBlY5QcBeB8AA6Ihw9UAV3UHJAcsX21fX3gADwAHFUYvZ1d4B20lYjImNS4pABYkAEYUHT0QMQkaBiYWeDZOJUsNchoAegAqTocAAU5YhzAHTvbokQgwROTgIbwhlWDyefoqeloAdwyHHnoVYe8QQLBaCEOAbnGeYIoINQdCBHh4gAowQgBKL19-VfJA+h+ETwLYABT2kGILxeq0+HgAfN8-P4HvByAAVSbwRbkGENebvD6XZHaImRca0QgATxEpB2N1yfgA5miAIKMZisF5fHzIzanRyPeDPF4uEzwDBQEi0Klk5F-AHIl6CH4o2bQMLFeZMcgIMKHTHkVbFQ4ZPCq-zqqBhABM2oguvg+pAhtWNtNugtKQ1DjQ9sdztd8DQHvNyIAunKoiJfAhHGK3J5ef5apyGmFBOGw-4pbAZbasIWw9pib5rrTGQ9aAA3eDsuqsBwvVP1OHJ1LijAtxuebsNYnRssMu5+eoMetpwhNnmqhMSvtTzyZ4m-NabacDinU2n0isjnZo0gyAASADkXiIVFKZ8i4w5YCpaFL6B4HJepRgAI6BeD0KlOEh4AoJIXkODAHyfX9DjlfwIOfDB7CpBBJQgQh4jzKlX0OAAjB9SAAawuVUx3oCdWw3VUjUw9tYLRBwF1ffkHQcFlyDIrkYJRQgazrDlW2bPjWE47QAhMI8m1-PZ6BvFEAjyFRkMkkDDgAMVOBAoAccgVAPchxIXJBDnmJTpJXbY+DEWBYGor04N-BDyCQiUoFQ9CZSwyo1HgIjkVXKB1g2bkzOjQdaTyRx2IaV9uQRJFV3+QEmy9AAeQJYHhL1LTnLtBIaDATleZsvncRFQN82SHGS2AIHhYBaAwHUEG0ZL2mqjLyv8D4PmjWSWrSxEUVVD5yRjMKRHsBxMQkF9PBikq4ocBVErK3qXOrdqKsqtDaBEeFc3cnhDxkHYklCSr2m23bMsqiARHiQJyGu-xHPieB3EOERjmwqCQCehxq1oWAf3cYBsv2qkes2hw1Fu+7yBBl54GKxEaKhsHpUwzwAGoJWMehWIwAGgfgMzNu0SHZPaAbruSy7EXeFq6ZS9o1o2hxhpEUK7EcAAZR9n2i5GFqWvwVpRZK1oCPNCEId6QDs+hTUQhA5ZctCMKQS9gUONnZL5p9bqZDBjeZ1nZKGkahz3e5iH+V53yRha72w8gRH1gXPAdr8fz-ACcmUkBsIe7SYxATiXbd-n7OV5zXIw18AHJcJUAiE7MiP3fsp8oAAUVrdQedQjRf1A5RqoIozp1iw69JPc8Ha6zdRu5hxWXieJBdisWJYgasHCgfYQdtwJ4m0XXKqm38HCplKg-IEP4Xd1vcsIFq54XlLM5fGfyuSyKpx3-wWtZ3w5RiBIkkcWY247ktfGafZ4n4X8aGw2hvsUAhsiAxl8hAG0AAcSAbQAHZyj6GqFIMwD8rA2BAJMaYV8FhLHMhCBwCdjinDTr4BBl8Ug31QfsdBGB2gLjMAncYYBFjqBeAPUgxxrDkAwNhK8VJ5g3w+FkQCtw8g0DQMAgArOAyoBgaAYFIDLGBrQtDaCzCIyBIAACqABZVkABJAAtCpI6OggA)
| artydev |
1,897,391 | [Game of Purpose] Day 35 | Today I figured out I can wrap my static mesh to be a Blueprint inside a StaticMeshActor Blueprint. I... | 27,434 | 2024-06-22T23:42:01 | https://dev.to/humberd/game-of-purpose-day-35-3820 | gamedev | Today I figured out I can wrap my static mesh to be a Blueprint inside a StaticMeshActor Blueprint. I moved all the logic related to grande hit detection and explosion to a new BP_Granade Blueprint. When BP_Granade was a regular Actor the Physics Constraint would not work. Now it's working correctly.
My current problem is with instantiating new grande when the previous one exploded. Do I need to hold the static mesh in a variable? | humberd |
1,847,933 | Dominando o Next.js: Dicas para Renderização do Lado do Servidor | Introdução Next.js é um framework de React que fornece funcionalidades prontas para... | 0 | 2024-06-22T23:20:30 | https://dev.to/vitorrios1001/dominando-o-nextjs-dicas-para-renderizacao-do-lado-do-servidor-2f6b | react, nextjs, render, webdev | ## Introdução
Next.js é um framework de React que fornece funcionalidades prontas para produção como renderização do lado do servidor (SSR - Server Side Rendering), geração de sites estáticos (SSG - Static Site Generation) e muito mais. Este artigo se concentra em explorar como o Next.js facilita a SSR para aplicações React, melhorando a performance e a otimização para mecanismos de busca (SEO).
## O que é SSR e por que é importante?
SSR refere-se ao processo de renderizar componentes de um aplicativo web no servidor, em vez de fazê-lo completamente no cliente. Este método traz diversas vantagens:
- **Melhoria na Performance de Carregamento:** O conteúdo é renderizado no servidor e enviado ao cliente como uma página HTML pronta, o que pode reduzir significativamente o tempo de carregamento percebido pelo usuário.
- **Otimização de SEO:** Como o conteúdo é pré-renderizado no servidor, os motores de busca são capazes de rastrear o site de forma mais eficaz, melhorando a visibilidade nos resultados de busca.
- **Melhoria na Experiência do Usuário:** Usuários veem o conteúdo mais rapidamente, o que é crucial para a retenção de usuários, especialmente em dispositivos móveis com conexões lentas.
## Configurando SSR no Next.js
Para começar com SSR no Next.js, você primeiro precisa criar um novo projeto ou configurar um existente para suportar Next.js. Isso pode ser feito com um simples comando:
```bash
npx create-next-app my-app
cd my-app
npm run dev
```
Agora, vamos explorar como implementar a SSR em suas páginas Next.js:
### 1. A Página Index
O Next.js utiliza um sistema de rotas baseado em arquivos. Para uma página que você deseja renderizar no servidor, você pode usar o método `getServerSideProps`. Este método é executado apenas no servidor, e os dados retornados são passados como props para o componente da página.
```javascript
export async function getServerSideProps(context) {
const res = await fetch(`https://api.example.com/data`);
const data = await res.json();
return { props: { data } };
}
function HomePage({ data }) {
return (
<div>
<h1>Bem-vindo ao Next.js com SSR!</h1>
<ul>
{data.map(item => (
<li key={item.id}>{item.title}</li>
))}
</ul>
</div>
);
}
export default HomePage;
```
### 2. Manipulando SEO com Next.js
Next.js torna fácil gerenciar aspectos de SEO graças ao componente `Head` incorporado. Você pode inserir meta tags diretamente nas suas páginas para melhorar o SEO.
```javascript
import Head from 'next/head';
function HomePage() {
return (
<>
<Head>
<title>Minha Aplicação Next.js</title>
<meta name="description" content="Uma aplicação Next.js com SSR" />
</Head>
<h1>Bem-vindo ao Next.js!</h1>
</>
);
}
```
## Benefícios da SSR com Next.js
- **Performance Aprimorada:** Reduz o tempo até o primeiro conteúdo significativo, crucial para retenção de usuários.
- **Melhor SEO:** Páginas pré-renderizadas são mais amigáveis aos motores de busca.
- **Escalabilidade:** O Next.js suporta técnicas híbridas, onde algumas páginas podem ser geradas estaticamente e outras renderizadas no servidor, permitindo uma arquitetura mais flexível e escalável.
## Conclusão
Dominar a renderização do lado do servidor com Next.js pode significativamente melhorar tanto a performance quanto a visibilidade de seu aplicativo web. A combinação de SSR, SEO otimizado, e performance aprimorada faz do Next.js uma escolha robusta para desenvolvedores React que buscam eficiência e eficácia em suas soluções web. Experimente, teste e veja a diferença em seus projetos! | vitorrios1001 |
1,897,384 | Symfony Station Communiqué — 21 June 2024: a look at Symfony, Drupal, PHP, Cybersec, and Fediverse News. | This communiqué originally appeared on Symfony Station. Welcome to this week's Symfony Station... | 0 | 2024-06-22T23:05:37 | https://symfonystation.mobileatom.net/Symfony-Station-Communique-21-June-2024 | symfony, drupal, php, fediverse | This communiqué [originally appeared on Symfony Station](https://symfonystation.mobileatom.net/Symfony-Station-Communique-21-June-2024).
Welcome to this week's Symfony Station communiqué. It's your review of the essential news in the Symfony and PHP development communities focusing on protecting democracy. That necessitates an opinionated Butlerian jihad against big tech as well as evangelizing for open-source and the Fediverse. We also cover the cybersecurity world. You can't be free without safety and privacy.
There's good content in all of our categories, so please take your time and enjoy the items most relevant and valuable to you. This is why we publish on Fridays. So you can savor it over your weekend.
Or jump straight to your favorite section via our website.
- [Symfony Universe](https://symfonystation.mobileatom.net/Symfony-Station-Communique-21-June-2024#symfony)
- [PHP](https://symfonystation.mobileatom.net/Symfony-Station-Communique-21-June-2024#php)
- [More Programming](https://symfonystation.mobileatom.net/Symfony-Station-Communique-21-June-2024#more)
- [Fighting for Democracy](https://symfonystation.mobileatom.net/Symfony-Station-Communique-21-June-2024#other)
- [Cybersecurity](https://symfonystation.mobileatom.net/Symfony-Station-Communique-21-June-2024#cybersecurity)
- [Fediverse](https://symfonystation.mobileatom.net/Symfony-Station-Communique-21-June-2024#fediverse)
Once again, thanks go out to Javier Eguiluz and Symfony for sharing [our communiqué](https://symfonystation.mobileatom.net/Symfony-Station-Communique-14-June-2024) in their [Week of Symfony](https://symfony.com/blog/a-week-of-symfony-911-10-16-june-2024).
**My opinions will be in bold. And will often involve cursing. Because humans.**
---
## Symfony
As always, we will start with the official news from Symfony.
Highlight -> "This week, the upcoming Symfony 7.2 version updated some code to [use constructor property promotion](https://github.com/symfony/symfony/commit/678abb4b128c0bd9f6db83a280bd5355ce234aec) and added a [new constraint to validate YAML contents](https://github.com/symfony/symfony/commit/e0ad00cc41ac43c976916ae432744543f1ba5983). In addition, we published more [transportation information and discounts](https://symfony.com/blog/symfonycon-vienna-2024-book-your-transportation-with-special-rates) for the [SymfonyCon Vienna 2024](https://live.symfony.com/2024-vienna-con/) conference."
[A Week of Symfony #911 (10-16 June 2024)](https://symfony.com/blog/a-week-of-symfony-911-10-16-june-2024)
They also have:
[Become our partner at SymfonyCon Vienna 2024](https://symfony.com/blog/become-our-partner-at-symfonycon-vienna-2024)
SymfonyCasts has:
[This week on SymfonyCasts](https://5hy9x.r.ag.d.sendibm3.com/mk/mr/sh/1t6AVsd2XFnIGKAdc2c4TLVnzSQuLj/H3UhRt0uONel)
---
## Featured Item
Once again we are selfishly blowing our horn.
I am sure you know building content-oriented websites today is an overcomplicated clusterfuck.
However, there is a content management system that makes it easier and simpler. And this is especially true for frontend developers. So, we're moving Mobile Atom Code to it.
### [K.I.S.S. - Why I moved my main site from Drupal to Grav CMS](https://symfonystation.mobileatom.net/drupal-grav-cms)
---
### This Week
Sylvain Blondeau has:
[Level 4 : sortie de Symfony 7.1](https://symfonylevelup.substack.com/p/symfony-level-up-4)
Ivo Bathke shows us:
[Symfony integration tests custom header is missing](https://nerdpress.org/2024/06/14/symfony-integration-tests-custom-header-is-missing/)
Matheo Daninos shows us:
[How to transform Component Development with Storybook and Symfony UX ?](https://dev.to/sensiolabs/how-to-transform-component-development-with-storybook-and-symfony-ux--c86)
**Great stuff.**
Nacho Colomina Torregrosa explores:
[An operation-oriented API using PHP and Symfony](https://dev.to/icolomina/an-operation-oriented-api-using-php-and-symfony-4p6d)
Chris Shennan demonstrates:
[Creating New Symfony Applications with Docker and the Symfony CLI](https://chrisshennan.com/blog/creating-symfony-applications-with-symfony-cli-and-docker)
Andy the Web Dev Queen gives:
[3 reasons why I love Doctrine](https://dev.to/webdevqueen/3-reasons-why-i-love-doctrine-30f5)
### Platforms
Rafael Neri shares:
[Artisan Serve no Lumen](https://dev.to/rafaelneri/artisan-serve-no-lumen-2e5l)
### eCommerce
Sylius has:
[Sylius Cloud by Platform.sh – strategic partnership announcement towards cloud via PaaS](https://sylius.com/blog/sylius-cloud-by-platform-sh/)
Dragan Rapić examines:
[Achieving more with Tax Provider in Shopware 6](https://levelup.gitconnected.com/achieving-more-with-tax-provider-in-shopware-6-3b8fabcaa768)
PrestaShop has:
[PrestaShop Live Update - June 2024](https://build.prestashop-project.org/news/2024/live-update-june-2024/)
Bleeping Computer reports:
[CosmicSting flaw impacts 75% of Adobe Commerce, Magento sites](https://www.bleepingcomputer.com/news/security/cosmicsting-flaw-impacts-75-percent-of-adobe-commerce-magento-sites/)
### CMSs
Concrete CMS has:
[Leveraging Concrete CMS for Ecommerce Website Development](https://www.concretecms.com/about/blog/web-design/leveraging-concrete-cms-for-ecommerce-website-development)
[HR Software with Concrete CMS](https://www.concretecms.com/about/blog/intranets/hr-software-with-concrete-cms)
<br/>
TYPO3 has:
[How to find your perfect match – TYPO3 Memberships & Partnerships](https://typo3.com/blog/typo3-memberships-and-partnerships)
[Members Have Selected Four Ideas to be Funded in Quarter 3/2024](https://typo3.org/article/members-have-selected-four-ideas-to-be-funded-in-quarter-3-2024)
Torben Hansen goes:
[From double to tripple: Preventing unintended opt-in / opt-out confirmations](https://www.derhansen.de/2024/06/2024-06-16-from-double-to-triple-preventing-unintended-opt-in-opt-out-confirmations.html)
<br/>
Joomla has:
[Your first glimpse at Joomla! 5.2.0 Alpha1](https://developer.joomla.org/news/933-your-first-glimpse-at-joomla-5-2-0-alpha1.html)
[The June Issue, The Joomla Gommunity Magazine](https://magazine.joomla.org/all-issues/june-2024/the-june-issue-2024)
[Creating full width Joomla modules inside content](https://magazine.joomla.org/all-issues/june-2024/creating-full-width-joomla-modules-inside-content)
<br/>
Drupal has:
[Drupal 10.3 is now available](https://www.drupal.org/blog/drupal-10-3-0)
[New community initiative: Frontend bundler](https://www.drupal.org/about/core/blog/new-community-initiative-frontend-bundler)
Specbee looks at:
[Getting started with integrating Drupal and Tailwind CSS](https://www.specbee.com/blogs/integrating-drupal-and-tailwind-css)
**If you really want to fuck up your site, do this.**
Wim Leers has:
[Experience Builder week 5: chaos theory](https://wimleers.com/xb-week-5)
Drupal Easy documents:
[Two very different European Drupal events in one week](https://www.drupaleasy.com/blogs/ultimike/2024/06/two-very-different-european-drupal-events-one-week)
[Visual Debugger module: a modern take on an old idea](https://www.drupaleasy.com/blogs/ultimike/2024/06/visual-debugger-module-modern-take-old-idea)
Lullabot asks:
[What Happens If You Don't Have a Unified Web Platform?](https://www.lullabot.com/articles/what-happens-if-you-dont-have-unified-web-platform)
**This is when Drupal excels.**
The Drop Times shares:
[What We Learned from DrupalJam: Open Up 2024](https://www.thedroptimes.com/40972/what-we-learned-drupaljam-open-2024)
[Driving Drupal Forward: Suzanne Dergacheva on the Strategic Rebranding of Drupal](https://www.thedroptimes.com/interview/40992/driving-drupal-forward-suzanne-dergacheva-strategic-rebranding-drupal)
Neeraj Singh shows us:
[How to Delete Old Revisions for Each Content Type in Drupal 9?](https://medium.com/@neerajsinghsonu/how-to-delete-old-revisions-for-each-content-type-in-drupal-15bad0fdfdd2)
Tag1 Consulting continues a series:
[Migrating Your Data from Drupal 7 to Drupal 10: Generating migrations with Migrate Upgrade](https://www.tag1consulting.com/blog/migrating-your-data-drupal-7-drupal-10-generating-migrations-migrate-upgrade)
Computer Minds shares a solution:
[My text filter's placeholder content disappeared!](https://www.computerminds.co.uk/articles/my-text-filters-placeholder-content-disappeared)
**Another example of Drupal’s infuriating complexity.**
Markie(Not Mark) shares:
[A bash script to set up Drupal for local development using DDEV](https://mark.ie/blog/a-bash-script-to-set-up-drupal-for-local-development-using-ddev/)
### Previous Weeks
And:
[Setting up a local development environment with DDEV to contribute to Drupal core](https://mark.ie/blog/setting-up-a-local-development-environment-with-ddev-to-contribute-to-drupal-core/)
Skoop asks:
[Upgrade or upgrade?](https://skoop.dev/blog/2024/06/07/upgrade_or_upgrade/)
Chris Shennan shares a quick tip:
[Fixing: ServiceNotFoundException - service or alias has been removed or inlined when the container was compiled](https://chrisshennan.com/blog/fixing-servicenotfoundexception-service-or-alias-has-been-removed-or-inlined-when-the-container-was-compiled)
---
## PHP
### This Week
Andreas Alsterhom explores:
[Using Models as Flags](https://alsterholm.com/blog/2024/using-models-as-flags)
Alex Castellano shows us:
[3 Ways to Use the sleep() Function](https://alexwebdevelop.activehosted.com/social/f8c1f23d6a8d8d7904fc0ea8e066b3bb.405)
Nikolay Nikolov goes:
[From Broken Windows to Bug-Free Code: Improving Software Quality](https://levelup.gitconnected.com/from-broken-windows-to-bug-free-code-improving-software-quality-987b5a326cc1)
Redfin Solutions says:
[DDEV, You're Still the One!](https://redfinsolutions.com/blog/ddev-youre-still-one/)
Stitcher examines:
[Tagged Singletons](https://stitcher.io/blog/tagged-singletons)
Ars Technica reports:
[Ransomware attackers quickly weaponize PHP vulnerability with 9.8 severity rating](https://arstechnica.com/security/2024/06/thousands-of-servers-infected-with-ransomware-via-critical-php-vulnerability/)
Anwar Sadat Ayub looks at:
[Mastering PHP File Paths: Simplifying Your Project's Structure](https://dev.to/anwar_sadat/mastering-php-file-paths-simplifying-your-projects-structure-650)
Tideways has:
[New in PHP 8.4: engine optimization of sprintf() to string interpolation](https://tideways.com/profiler/blog/new-in-php-8-4-engine-optimization-of-sprintf-to-string-interpolation)
Cees-Jan Kiewiet explores:
[Updating (PHP) packages to ReactPHP Promise v3, and test your types with PHPStan](https://blog.wyrihaximus.net/2024/06/updating-php-packages-to-reactphp-promise-v3--and-test-your-types-with-phpstan/)
Free Code Camp examines:
[PHP Arrays in Practice: How to Rebuild the Football Team Cards Project with PHP and MongoDB](https://www.freecodecamp.org/news/php-arrays-how-to-rebuild-the-football-team-cards-with-php-and-mongodb/)
ServBay show us:
[How to Improve Development Efficiency with PHP 8](https://dev.to/servbay/how-to-improve-development-efficiency-with-php-8-1c02)
Marin Bezhanov looks at:
[Practical Logging for PHP Applications with OpenTelemetry](https://betterstack.com/community/guides/logging/php-logging-opentelemetry/)
Alexander Bondars explores:
[Secondary constructors in PHP](https://medium.com/@alexander.bondars/secondary-constructors-in-php-283acb656823)
Amin Sharifi examines:
[Mastering Stateful and Stateless PHP Web Application Architecture](https://medium.com/@moaminsharifi/mastering-stateful-and-stateless-php-web-application-architecture-159287d9eeed)
Laravel News shows us how to:
[Running a Single Test, Skipping Tests, and Other Tips and Tricks](https://laravel-news.com/run-single-tests-skip-tests-phpunit-and-pest)
Jayprakash G Jangir looks ahead to:
[PHP 9: Anticipated Features and Enhancements Compared to PHP 8](https://medium.com/@jayprakashj/php-9-anticipated-features-and-enhancements-compared-to-php-8-8fce029bf1cd)
Ambionics has:
[Iconv, set the charset to RCE: Exploiting the glibc to hack the PHP engine (part 2)](https://www.ambionics.io/blog/iconv-cve-2024-2961-p2)
### Previous Weeks
And:
[Iconv, set the charset to RCE: Exploiting the glibc to hack the PHP engine (part 1)](https://www.ambionics.io/blog/iconv-cve-2024-2961-p1)
---
## More Programming
Smashing Magazine has:
[MDX Or: How I Learned To Stop Worrying And Love Multimedia Writing](https://www.smashingmagazine.com/2024/06/mdx-or-how-i-learned-love-multimedia-writing/)
**Fantastic.**
[What Are CSS Container Style Queries Good For?](https://www.smashingmagazine.com/2024/06/what-are-css-container-style-queries-good-for/)
Lea Verou asks:
[Inline conditionals in CSS?](https://lea.verou.me/blog/2024/css-conditionals/)
Frontend Masters opines:
[One of the Boss Battles of CSS is Almost Won! Transitioning to Auto](https://frontendmasters.com/blog/one-of-the-boss-battles-of-css-is-almost-won-transitioning-to-auto/)
Adële looks at:
[Redefining JavaScript usage on the SmolWeb](https://adele.pages.casa/md/blog/redefining_javascript_usage_on_the_smolweb.md)
**This freedom is one of the reasons I'm moving my main business site from Drupal to Grav CMS.**
Smashing Magazine tries:
[Uniting Web And Native Apps With 4 Unknown JavaScript APIs](https://www.smashingmagazine.com/2024/06/uniting-web-native-apps-unknown-javascript-apis/)
Rob Allen explores:
[Getting status code and body from curl in a bash script](https://akrabat.com/getting-status-code-and-body-from-curl-in-a-bash-script/)
Roman Agabekov examines:
[InnoDB Performance Tuning – 11 Critical InnoDB Variables to Optimize Your MySQL Database](https://dev.to/drupaladmin/innodb-performance-tuning-11-critical-innodb-variables-to-optimize-your-mysql-database-2l01)
Grant Horwood looks at:
[Amber: writing bash scripts in amber instead. pt. 1: commands and error handling](https://gbh.fruitbat.io/2024/06/18/amber-writing-bash-scripts-in-amber-instead-pt-1-commands-and-error-handling/)
[Amber: writing bash scripts in amber instead. pt. 2: loops and ifs](https://gbh.fruitbat.io/2024/06/20/amber-writing-bash-scripts-in-amber-instead-pt-2-loops-and-ifs/)
VentureBeat reports:
[Apple embraces open-source AI with 20 Core ML models on Hugging Face platform](https://venturebeat.com/ai/apple-embraces-open-source-ai-with-20-core-ml-models-on-hugging-face-platform/)
Ludicity warns:
[I Will Fucking Piledrive You If You Mention AI Again](https://ludic.mataroa.blog/blog/i-will-fucking-piledrive-you-if-you-mention-ai-again/)
**Ah, a man after my own heart. I have been saying what he covers in Section 2 for several years.**
---
## Fighting for Democracy
[Please visit our Support Ukraine page](https://symfonystation.mobileatom.net/Support-Ukraine)to learn how you can help
kick Russia out of Ukraine (eventually, like ending apartheid in South Africa).
### The cyber response to Russia’s War Crimes and other douchebaggery
The Kyiv Post reports:
[HUR Hacks into Russia’s Ulyanovsk City Administration’s Website](https://www.kyivpost.com/post/34315)
The Kyiv Independent reports:
[Ukrainian hackers claim responsibility for cyberattack on Russian banks, payment system](https://kyivindependent.com/ukraine-it-army-hack-bank-russia/)
The Register reports:
[Mozilla defies Kremlin, restores banned Firefox add-ons in Russia](https://www.theregister.com/2024/06/14/mozilla_firefox_russia/)
BleepingComputer reports:
[US sanctions 12 Kaspersky Lab execs for working in Russian tech sector](https://www.bleepingcomputer.com/news/security/us-sanctions-12-kaspersky-lab-execs-for-working-in-russian-tech-sector/)
Vox reports:
[The AI bill that has Big Tech panicked](https://www.vox.com/future-perfect/355212/ai-artificial-intelligence-1047-bill-safety-liability)
TechCrunch reports:
[US sues Adobe for hiding termination fees and making it difficult to cancel subscriptions](https://techcrunch.com/2024/06/17/us-sues-adobe-for-hiding-termination-fees-and-making-it-difficult-to-cancel-subscriptions/)
[FTC Chair Lina Khan on startups, scaling, and ”innovations in potential lawbreaking”](https://techcrunch.com/2024/06/15/ftc-chair-lina-khan-on-startups-scaling-and-innovations-in-potential-law-breaking/)
[FTC refers TikTok child privacy case to Justice Department](https://techcrunch.com/2024/06/18/ftc-refers-tiktok-child-privacy-case-to-justice-department/)
The FTC has:
[Succor borne every minute](https://www.ftc.gov/business-guidance/blog/2024/06/succor-borne-every-minute)
**I'm starting to think FTC stands for fuck up the c^nts and that's awesome. ;)**
9 to 5 Mac reports:
[EU set to fine Apple for failing to comply with the DMA](https://9to5mac.com/2024/06/14/eu-dma-fine-apple/)
Ars Technica reports:
[Meta halts plans to train AI on Facebook, Instagram posts in EU](https://arstechnica.com/tech-policy/2024/06/meta-halts-plans-to-train-ai-on-facebook-instagram-posts-in-eu/)
The Guardian has an interview:
[‘Encryption is deeply threatening to power’: Meredith Whittaker of messaging app Signal](https://www.theguardian.com/technology/article/2024/jun/18/encryption-is-deeply-threatening-to-power-meredith-whittaker-of-messaging-app-signal)
The Verge reports:
[Adobe’s new terms of service say it won’t use your work to train AI](https://www.theverge.com/2024/6/18/24181001/adobe-updated-terms-of-service-wont-train-ai-on-work)
[Biden administration to ban Russian company’s antivirus software](https://www.theverge.com/2024/6/20/24182531/kaspersky-lab-antivirus-software-banned-us-biden-russia)
**This should have happened years ago.**
The Register reports:
[How Europe can force Apple to support competition](https://www.theregister.com/2024/06/21/eu_apple_owa/?td=rt-3a)
### The Evil Empire Strikes Back
The Electronic Frontier Foundation has:
[The UN Cybercrime Draft Convention is a Blank Check for Surveillance Abuses](https://www.eff.org/deeplinks/2024/06/un-cybercrime-draft-convention-blank-check-unchecked-surveillance-abuses)
Speaking of bone-headed legislation, 404 Media reports:
[The DJI Drone Ban: A Uniquely American Clusterfuck](https://www.404media.co/email/d2bf20ab-889f-4985-89fb-105eb307257a/)
**This should not be happening.**
[AI Images in Google Search Results Have Opened a Portal to Hell](https://www.404media.co/google-image-search-ai-results-have-opened-a-portal-to-hell/)
EuroNews reports:
[AI could fuel wave of Holocaust denial, UNESCO finds](https://www.euronews.com/next/2024/06/18/ai-could-fuel-wave-of-holocaust-denial-unesco-finds)
[Pro-Russian actors flooding newsrooms with fake content to overwhelm fact-checkers, study says](https://www.euronews.com/my-europe/2024/06/15/russia-deliberately-flooding-newsrooms-with-fake-content-to-overwhelm-fact-checkers-study-)
[ChatGPT, Grok, Gemini and other AI chatbots are spewing Russian misinformation, study finds](https://www.euronews.com/next/2024/06/18/chatgpt-grok-gemini-and-other-ai-chatbots-are-spewing-russian-misinformation-study-finds)
The Kyiv Independent reports:
[Russia turns to blackmail, big money in effort to recruit German spies, Berlin officials say](https://kyivindependent.com/russia-turns-to-blackmail-and-big-money-in-effort-to-recruit-german-spies-berlin-officials-say/)
The Register reports:
[Russia's cyber spies still threatening French national security, democracy](https://www.theregister.com/2024/06/20/russias_cyber_attacks_france_report/)
The Hacker News reports:
[Chinese Cyber Espionage Targets Telecom Operators in Asia Since 2021](https://thehackernews.com/2024/06/chinese-cyber-espionage-targets-telecom.html)
[Chinese Hackers Deploy SpiceRAT and SugarGh0st in Global Espionage Campaign](https://thehackernews.com/2024/06/chinese-hackers-deploy-spicerat-and.html)
The Guardian reports:
[Deluge of ‘pink slime’ websites threaten to drown out truth with fake news in US election](https://www.theguardian.com/us-news/article/2024/jun/20/fake-news-websites-us-election)
Ars Technica reports:
[Lawsuit: Meta engineer told to resign after calling out sexist hiring practices](https://arstechnica.com/tech-policy/2024/06/lawsuit-meta-engineer-told-to-resign-after-calling-out-sexist-hiring-practices/)
Cory Doctorow writes:
[Microsoft pinky swears that THIS TIME they’ll make security a priority](https://doctorow.medium.com/https-pluralistic-net-2024-06-14-patch-tuesday-fool-me-twice-we-dont-get-fooled-again-af0ed5dd29f2)
Tech Dirt reports:
[500,000 Books Have Been Deleted From The Internet Archive’s Lending Library](https://www.techdirt.com/2024/06/20/500000-books-have-been-deleted-from-the-internet-archives-lending-library/)
### Cybersecurity/Privacy
Netzpolitik says the EU's:
[Chat Control is Pure Surveillance State](https://netzpolitik.org/2024/client-side-scanning-chat-control-is-pure-surveillance-state/)
TechCrunch reports:
[Privacy app maker Proton transitions to nonprofit foundation structure](https://techcrunch.com/2024/06/17/privacy-app-maker-proton-transitions-to-non-profit-foundation-structure/)
Forbes reports:
[New Wi-Fi Takeover Attack—All Windows Users Warned To Update Now](https://www.forbes.com/sites/daveywinder/2024/06/14/new-wi-fi-takeover-attack-all-windows-users-warned-to-update-now/)
DarkReading reports:
[MITRE: US Government Needs to Focus on Critical Infrastructure](https://www.darkreading.com/ics-ot-security/mitre-advises-us-government-to-shape-up-for-critical-infrastructure)
Futurism reports:
[Edward Snowden Says OpenAI Just Performed a “Calculated Betrayal of the Rights of Every Person on Earth”](https://futurism.com/the-byte/snowden-openai-calculated-betrayal)
Robb Knight demonstrates:
[Blocking Bots with Nginx](https://rknight.me/blog/blocking-bots-with-nginx/](https://rknight.me/blog/blocking-bots-with-nginx/)
Krebson on Security reports:
[Alleged Boss of ‘Scattered Spider’ Hacking Group Arrested](https://krebsonsecurity.com/2024/06/alleged-boss-of-scattered-spider-hacking-group-arrested/)
Wired reports:
[/e/OS Is Better Than Android. You Should Try It](https://www.wired.com/story/e-os-review/)
**My next phone is definitely going to be a Fairphone with this operating system. [You can get yours today](https://murena.com/america/shop/smartphones/brand-new/murena-fairphone-4/).**
Lawfare Media covers Europe's approach to cybersecurity:
[Moving Slow and Fixing Things](https://www.lawfaremedia.org/article/moving-slow-and-fixing-things)
---
### Fediverse
The Fediverse Report has:
[Last Week in Fediverse – ep 73 (and 72)](https://fediversereport.com/last-week-in-fediverse-ep-73-and-72/)
Cornell University published:
[Decentralized Social Networks and the Future of Free Speech Online](https://arxiv.org/abs/2406.06934)
Patchwork says:
[We need to finish building the Fediverse Part II: Patchwork](https://www.blog-pat.ch/we-need-to-finish-building-the-fediverse-part-ii-patchwork/)
These Yaks Ain't Gonna Shave Themselves offers:
[A Different Vision for a Healthy Fediverse](https://polotek.net/posts/a-different-vision-for-a-healthy-fediverse/)
Pennsylvania State University published:
[The Failed Migration of Academic Twitter](https://arxiv.org/pdf/2406.04005)
FediTest has a report:
[Webfinger server tests of hosted Fediverse applications](https://feditest.org/contrib/results/2024-06-16/)
Mastodon has:
[Trunk & Tidbits, May 2024](https://blog.joinmastodon.org/2024/06/trunk-tidbits-may-2024/)
Ghost has an update:
[Alright, let's Fedify](https://activitypub.ghost.org/day-4/)
Lemmy has:
[Lemmy v0.19.4 Release - Image Proxying and Federation improvements](https://join-lemmy.org/news/2024-06-07_-_Lemmy_Release_v0.19.4_-_Image_Proxying_and_Federation_improvements)
The Verge reports:
[Meta releases Threads API for developers to build ‘unique integrations’](https://www.theverge.com/2024/6/18/24180794/meta-threads-api-developers-launch-availability)
**Prepping for ads and bots.**
GoToSocial announces:
[We've just released GoToSocial version 0.16.0 Snappy Sloth into the wild](https://gts.superseriousbusiness.org/@gotosocial/statuses/01J0GJ216FPA5K9GW97V333MAW)
### Other Federated Social Media
The Electronic Frontier Foundation also has:
[What’s the Difference Between Mastodon, Bluesky, and Threads?](https://www.eff.org/deeplinks/2024/06/whats-difference-between-mastodon-bluesky-and-threads)
---
## CTAs (aka show us some free love)
- That’s it for this week. Please share this communiqué.
- Also, please [join our newsletter list for The Payload](https://newsletter.mobileatom.net/). Joining gets you each week's communiqué in your inbox (a day early).
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You can find a vast array of curated evergreen content on our [communiqués page](https://symfonystation.mobileatom.net/communiques).
## Author
### Reuben Walker
Founder
Symfony Station | reubenwalker64 |
1,897,383 | Setup a Next.JS project for production-ready | Create a Next.JS project for this tutorial I’m using bun but you can npm or yarn. bunx... | 0 | 2024-06-22T22:52:24 | https://dev.to/es_pythonus/setup-a-nextjs-project-for-production-ready-2nho |
1. Create a Next.JS project for this tutorial I’m using bun but you
can npm or yarn.
`bunx create-next-app@latest app-name`
Wait till the Dependency installation finishes and navigate to the
project directory
2. ESLint/Prettier setup overview
Add Packages:
`bun add --dev eslint-plugin-prettier eslint-config-prettier
prettier `
Modify .eslintrc.json file as below you can change rules as you
like
Create prettier configs files .prettierrc and .prettierignore
3. Add lint/format scripts to the package.json file
```
"lint": "eslint --ext .ts,.tsx ./src",
"prettier": "prettier {src,__{tests,mocks}__}/**/*.{ts,tsx}",
"format:check": "bun run prettier --check",
"format:fix": "bun run prettier --write",
```
4. Add Pre-commit Hook.
You can use Prettier with a pre-commit tool. This can re-format
your files that are marked as “staged” via git add before you
commit.
`bunx mrm@2 lint-staged`
This will install husky and lint-staged, then add a configuration to the project’s package.json that will automatically format supported files in a pre-commit hook. | es_pythonus | |
1,897,382 | How Sarah Protected Her Privacy with a Random Phone Number | Privacy has become a paramount concern, especially in online dating. Navigating the internet while... | 0 | 2024-06-22T22:52:01 | https://dev.to/legitsms/how-sarah-protected-her-privacy-with-a-random-phone-number-3dg8 | tutorial, news, cloud, security | Privacy has become a paramount concern, especially in online dating. Navigating the internet while safeguarding personal information can be challenging. This article is the story of Sarah, a savvy online dater who successfully protected her privacy using a random phone number for SMS verification. She turned to legitsms.com, a reliable service offering virtual phone numbers, to keep her information secure and avoid unwanted attention.
Sarah's Online Dating Journey
The Start of Something New
Sarah, like many other girls, decided to try her luck with online dating. Excited yet cautious, she signed up on several dating platforms, eager to meet new people. However, she seems aware of the potential risks of sharing her personal information online. One of her main concerns was the requirement for a phone number for SMS verification. Sharing her real number felt too risky, as it could lead to unsolicited messages or even compromise her privacy.
The Privacy Dilemma
Sarah's concerns were not unfounded. Many online daters have reported instances where their phone numbers were misused, leading to harassment or privacy breaches. Determined to avoid such pitfalls, Sarah began searching for a solution that would allow her to verify her accounts without exposing her real phone number.
Discovering legitsms.com
The Quest for a Solution
In her quest for a safer alternative, Sarah stumbled upon legitsms.com, a service that provides [random phone numbers](legitsms.com) for SMS verification. Intrigued, she delved deeper into the platform to understand how it worked and whether it could meet her needs.
How legitsms.com Works
Legitsms.com offers a range of virtual phone numbers from different regions, including Canada, California, the USA, Europe, and other parts of the world. These random real phone numbers can be used for SMS verification across various platforms. The process is simple: users select a random phone number from the list, use it for verification, and receive the necessary SMS codes through the legitsms.com interface.
## Benefits of Using [Random Phone Numbers]
(legitsms.com)
Using a random phone number for SMS verification comes with several benefits:
- Enhanced Privacy: By using a random phone number, Sarah could keep her real number confidential, protecting herself from potential privacy breaches.
- Avoiding Unwanted Attention: Random phone numbers helped Sarah avoid unsolicited messages or calls from individuals she interacted with on dating platforms.
- Flexibility: With a wide selection of random phone numbers in Canada, California, the USA, Europe, and other regions, Sarah could choose the most convenient option for her needs.
Sarah's Experience with legitsms.com
Setting Up Her Accounts
Sarah decided to give legitsms.com a try. She selected a random phone number from the list and used it to verify her dating profiles. The process was seamless, and she quickly received the necessary verification codes without hiccups. Using these random telephone number generators, she easily verifies her accounts across various platforms.
Navigating Online Dating Safely
With her accounts verified and her real phone number safeguarded, Sarah felt more confident navigating the online dating platforms. She no longer had to worry about her personal information being misused. This sense of security allowed her to focus on building genuine connections with potential matches.
Avoiding Unwanted Attention
One of the biggest advantages Sarah experienced was the ability to avoid unwanted attention. On several occasions, individuals she interacted with tried to contact her outside the dating platforms. Thanks to her use of [random phone numbers](legitsms.com), these attempts were unsuccessful, as her real contact information remained secure.
Why Choose legitsms.com?
Reliability and Security
Legitsms.com proved to be a reliable and secure solution for Sarah. The service offers genuine random real phone numbers, ensuring that users can trust the numbers they use for verification. This reliability is crucial, especially when dealing with sensitive platforms like online dating sites.
Wide Range of Options
The variety of random phone numbers available on legitsms.com was another major plus for Sarah whether she needed a random phone number in Canada, California, the USA, or other parts of the world for SMS verifications.
Ease of Use
The user-friendly interface of legitsms.com made the entire process straightforward. You can easily select a random phone number, use it for verification, and receive SMS codes without hassle.
Cost-Effective Solution
Using legitsms.com was also a cost-effective solution for Sarah. Instead of investing in multiple SIM cards or phone lines, she could rely on the service's virtual numbers as low as 0.60$. This affordability made it an attractive option for anyone looking to protect their privacy without breaking the bank.
Conclusion
Sarah's journey through online dating illustrates the importance of protecting personal information. By using a random phone number for SMS verification through legitsms.com, she successfully safeguarded her privacy and avoided unwanted attention. Her experiences are a valuable lesson for anyone navigating the digital landscape: privacy is paramount, and taking proactive steps to protect it can lead to a safer and more enjoyable online experience.
Legitsms.com proved to be a reliable, secure, and cost-effective solution for Sarah, offering a wide range of random phone numbers, including options in Canada, California, the USA, and other parts of the world. By embracing such tools and best practices, online daters can enjoy the benefits of meeting new people while keeping their personal information secure. | legitsms |
1,897,335 | Understanding FastAPI: The Basics | This post lives in: Linkedin github.com/ceb10n ceb10n.medium.com I've been working with FastAPI... | 0 | 2024-06-22T22:47:41 | https://dev.to/ceb10n/understanding-fastapi-the-basics-246j | fastapi, uvicorn, starlette, python | This post lives in:
* [Linkedin](https://www.linkedin.com/pulse/understanding-fastapi-basics-rafael-de-oliveira-marques-xfvaf)
* [github.com/ceb10n](https://github.com/ceb10n/blog-posts/tree/master/understanding-fastapi-the-basics)
* [ceb10n.medium.com](https://ceb10n.medium.com/understanding-fastapi-the-basics-14221665f742)
I've been working with [FastAPI](https://fastapi.tiangolo.com/) for a while now, and I decided to start digging a little deeper on it's internals.
Let's start from the beginning:
## What is FastAPI?
As the docs says:
> FastAPI is a modern, fast (high-performance), web framework for building APIs with Python based on standard Python type hints.
So here we have a good idea about what is FastAPI: A web framework for building APIs.
But it's not a framework built from scratch, it's a framework that was built on top of another framework: [Starlette](https://www.starlette.io/).
## And what is Starlette?
If we go to starlette's website, we'll find that:
> Starlette is a lightweight ASGI framework/toolkit, which is ideal for building async web services in Python.
## And what is ASGI?
ASGI, or Asynchronous Server Gateway Interface is a specification that proposes an interface between web servers and python applications.
When we are running our fastapi application, we're using an ASGI server that will forward the request to our app.
Some of the most well-known asgi servers are:
- [Uvicorn](https://www.uvicorn.org/)
- [Hypercorn](https://hypercorn.readthedocs.io/en/latest/index.html)
- [Daphne](https://github.com/django/daphne)
## Let's recap
FastAPI is a modern webframework written in python that is built on top Starlette, which in turn is a lightweight ASGI framework that needs an ASGI server to run.
## Let's create a basic ASGI application
So if we want to understand how FastAPI works, we must start from the beginning: a simple asgi application:
```python
async def app(scope, receive, send):
await send({
"type": "http.response.start",
"status": 200,
"headers": [
[b"content-type", b"text/plain"],
],
})
await send({
"type": "http.response.body",
"body": b"Hello, World!",
})
```
Can you imagine that all features that FastAPI offers you, all middlewares and error handling, OpenAPI docs, etc., starts from this?
That's how ASGI is specified: a single asynchronous callable that takes a dict and two asynchronous callables as parameters.
And it works, without any webframework installed! Now let's check if it's really working:
First, install an ASGI server:
```shell
pip install uvicorn
```
And create a python file called app with the code above.
Let's run it and see if it's working:
```shell
uvicorn app:app
```
Now enter `http://localhost:8000` in your browser:
```shell
INFO: Started server process [4808]
INFO: Waiting for application startup.
INFO: ASGI 'lifespan' protocol appears unsupported.
INFO: Application startup complete.
INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO: 127.0.0.1:64045 - "GET / HTTP/1.1" 200 OK
```
Let's change to hypercorn to see if we are not tied to uvicorn somehow:
```shell
pip install hypercorn
```
And we can see it still works:
```shell
hypercorn app:app
[2024-06-22 19:00:55 -0300] [13008] [WARNING] ASGI Framework Lifespan error, continuing without Lifespan support
[2024-06-22 19:00:55 -0300] [13008] [INFO] Running on http://127.0.0.1:8000 (CTRL + C to quit)
```
## Creating the simplest FastAPI clone ever
Now that we know what's beneath FastAPI, we can start playing a little bit and create the smallest, simpler ASGI framework ever:
```
class SimplestFrameworkEver:
async def __call__(self, scope, receive, send):
await send({
"type": "http.response.start",
"status": 200,
"headers": [
[b"content-type", b"text/plain"],
],
})
await send({
"type": "http.response.body",
"body": b"Hello, World!",
})
app = SimplestFrameworkEver()
```
And you can still run it like before, with:
```shell
hypercorn app:app
```
or
```shell
uvicorn app:app
```
## Next steps
Now that we can understand the basics on which FastAPI is made, we can move on to see:
* how Starllete works
* how FastAPI extends Starllete
Stay tuned for the next posts ;) | ceb10n |
1,897,178 | Generating training data with OpenAI function calling | As I delve into the fields of Machine Learning and AI, it's clear that the quality of training data... | 0 | 2024-06-22T22:26:55 | https://dev.to/maurerkrisztian/generating-training-data-with-openai-function-calling-2c7l | ai, machinelearning, javascript, openai |
As I delve into the fields of Machine Learning and AI, it's clear that the quality of training data is crucial. Creating training data, such as labeling 10,000 texts or images, can be a tedious task. However, OpenAI models can be used to automate this process. OpenAI models can generate specific training or fine-tuning data for our own models. In this blog post, I will discuss how this works.
(_btw did you know that GPT can generate memes?_)
### Why Use [Function Calling](https://platform.openai.com/docs/guides/function-calling) for This?
One of the most useful features of OpenAI is function calling. It can call our functions with a predefined schema, ensuring consistency. When generating training data, this consistency is crucial. For example, most label values must follow a schema with a predefined set of options. Additionally, you can add logic to these functions to handle the clean, consistent data, such as saving it to a database or a CSV file.
### My Motivation
In my latest side project, I created an [RSS reader](https://nexirss.netlify.app/) with AI features.
One of the features is to categorize post content as "positive," "negative," or "neutral." This allows users to filter out negative posts if they prefer. While I found many models that do a good job, I plan to fine-tune one with RSS feed data to improve accuracy. However, if I want to create a more advanced sentiment classifier with custom labels, I need to create my own training dataset and train my model. Whether I use an existing model or create one, I need high-quality training data. This is why I brainstormed and found the following method.
### Labeling Data with OpenAI
First, gather some data. From this data, you can create a fine-tuned dataset by labeling or adding new machine learning features. Here's a simple guide:
1. **Provide Proper Context for OpenAI**:
- Add a clear system prompt, e.g., `"Your task is to label the provided data."`
- Include the data context in the prompt, e.g., `"Label this blog post with the label_tool: 'blog post content...'."`
2. **Create the Function Schema for OpenAI**:
- Provide a detailed description of the tool.
- Clearly define the parameters, using enums and other schema elements to restrict responses.
3. **Create the Function Defined by the Schema**:
- This function can process the data, save it, or perform other tasks. In my case, it can add a new row to a training data CSV file, creating a new training element.
By following these steps, you can accurately and consistently label data, making it ready for training your models.
### Let's Look at a Simple Code Example
Here is a simple example of a text labeling tool. Keep in mind you can do much more complex things than this, such as creating complex ML features or utilizing image recognition or text-to-speech features. But to keep it clear, I chose this example:
In this example, I add a label to any text which can be `['positive', 'negative', 'neutral']` and write the result to a CSV file so it can be later used to teach or fine-tune a model.
```typescript
import {ITool, ToolSchema} from './interfaces/tool.interface';
import {ToolUtils} from "../utils/tool-utils";
import * as path from 'path';
import {createObjectCsvWriter as createCsvWriter} from 'csv-writer';
export class LabelTool implements ITool<string[], { inputText: string }> {
private csvWriter;
constructor(private readonly labels: string[] = ['positive', 'negative', 'neutral'], private readonly csvFilePath: string = path.join('labeled_text.csv')) {
this.csvWriter = createCsvWriter({
path: this.csvFilePath,
header: [
{id: 'label', title: 'Label'},
{id: 'text', title: 'Text'},
],
append: true
});
}
// The openAI model will call this fn with the proper "options" parameter, the ctx just our optional additional context.
async callback(
options: { label: string },
ctx: { inputText: string },
): Promise<any> {
// write the new labeled data row to a csv
await this.csvWriter.writeRecords([{
label: options.label,
text: ctx.inputText
}]);
console.log(`Add CSV row: ${options.label} | ${ctx.inputText}`);
return `Added label successfully: ${options.label}`;
}
// learn more about json schemas here https://json-schema.org/learn/getting-started-step-by-step
async getSchema(ctx: { inputText: string }): Promise<ToolSchema> {
// this is the provided schema for the LLM
return {
type: 'function',
function: {
name: 'set_label',
description: 'Set label to text',
function: ToolUtils.getToolFn(this, ctx),
parse: JSON.parse,
parameters: {
type: 'object',
properties: { // thies properties will be in the callback "options" param
label: {
type: 'string',
description: 'label of the input text',
enum: this.labels // restrict the possible strings
},
},
},
},
};
}
}
```
With this tool, you can make requests to OpenAI and iterate over your data that needs to be labeled.
```typescript
import OpenAI from "openai";
import {LabelTool} from "./tools/label.tool";
require('dotenv').config()
const client = new OpenAI({
apiKey: process.env.OPENAI_API_KEY,
});
(async () => {
const inputTexts = [ // the OpenAI model will label thies with ['positive', 'negative', 'neutral']
"I love this product!",
"This is the worst thing I have ever bought.",
"It's okay, not great but not bad either.",
"Not worth the money.",
"Best purchase ever!",
];
for (const inputText of inputTexts) {
console.debug(`Prompt: Label this text: ${inputText}`);
const tool = new LabelTool(['positive', 'negative', 'neutral']);
const context = { inputText: inputText };
const prompt = `Label this text: ${inputText}`;
const system = 'You are a helpful assistant generating training data';
const runner = client.beta.chat.completions.runTools({
model: 'gpt-3.5-turbo',
messages: [
{
role: 'system',
content: system,
},
{
role: 'user',
content: prompt,
},
],
tools: [await tool.getSchema(context)],
tool_choice: 'auto', // If you pass tool_choice: {function: {name: …}} instead of auto, it returns immediately after calling that function
});
const finalContent = await runner.finalContent();
console.log(`AI response: ${finalContent}
`);
}
})();
```
Let's run it:
```bash
➜ git:(main) ✗ npx ts-node index.ts
```
Log result:
```
Prompt: Label this text: I love this product!
Add CSV row: positive | I love this product!
AI response: The text "I love this product!" has been labeled as positive.
Prompt: Label this text: This is the worst thing I have ever bought.
Add CSV row: negative | This is the worst thing I have ever bought.
AI response: The text "This is the worst thing I have ever bought." has been labeled as negative.
Prompt: Label this text: It's okay, not great but not bad either.
Add CSV row: neutral | It's okay, not great but not bad either.
AI response: The text "It's okay, not great but not bad either." has been labeled as neutral.
Prompt: Label this text: Not worth the money.
Add CSV row: negative | Not worth the money.
AI response: The text "Not worth the money." has been labeled as "negative".
Prompt: Label this text: Best purchase ever!
Add CSV row: positive | Best purchase ever!
AI response: The text "Best purchase ever!" has been labeled as positive.
```
CSV file:
```csv
Label,Text
positive,I love this product!
negative,This is the worst thing I have ever bought.
neutral,"It's okay, not great but not bad either."
negative,Not worth the money.
positive,Best purchase ever!
```
Of course, there are many ways to simplify and extend this method, but I chose this example to give you an idea. You can try out the code in this GitHub repository: https://github.com/MaurerKrisztian/training_data_genration_with_openai
Using OpenAI's function calling can make it much easier to create high-quality training data. Whether you're labeling text, images, audio, or other data, this method ensures that the labels are accurate and consistent. This can save a lot of time and effort when training or fine-tuning your machine learning models.
Thank you for reading this blog post! I'm still experimenting with this idea, so if you have any thoughts on how this method can be used or expanded, please leave a comment. | maurerkrisztian |
1,897,380 | A Brief Evolution of Data Management: From Business Intelligence to Artificial Intelligence | (8 min read) The first time I learned about organising and processing business data was during an... | 0 | 2024-06-22T22:22:23 | https://dev.to/jestevesv/a-brief-evolution-of-data-management-from-business-intelligence-to-artificial-intelligence-1d71 | datamanagement, businessintelligence, generativeai, ai | (8 min read)
The first time I learned about organising and processing business data was during an "Analysis and System Design" course. It introduced the concept of designing a system from business requirements to interface, focusing on Transactional Systems. Additionally, the course taught a methodology to create a data structure for further data analysis and visualisation, applicable to Decision Support Systems, which formed the foundation of what was referred to as conventional data analytics and business intelligence before the rise of artificial intelligence in data analytics.
**The Challenges of Data Analytics**
In the early 2000s, conventional data analytics was groundbreaking and disruptive, but academic publications rarely mentioned terms like Business Intelligence, Business Analytics, or Big Data. By 2010, these terms had become exponentially popular (1). That year, $2.4 trillion was spent on software services in the business sector. Despite this investment, only 32% of technology projects were successful, meaning 68% failed to deliver value to the organisation (2). Successful projects typically achieve this by ensuring alignment between the solutions and the business strategy. Conversely, misalignment between these can also lead to project failures.
Data analytics projects aim to deliver business value, prioritising practical solutions over perfect ones. Data scientists typically spend between 75% and 80% of their time cleaning, organising, and preparing data for analysis. Therefore, ensuring that the data is well-prepared and meets the business's needs greatly improves the chances of achieving successful outcomes from analytics projects. The results of this effort are often presented in dashboards with KPIs for performance, frequently using descriptive and diagnostic analytics (3). This process is time-consuming and challenging, especially when bridging the gap between the objectives of business users and the requirements for data visualisation.
Every company has different levels of data processing and development capabilities, and aligning these capabilities with business requirements is crucial. When there is a mismatch, there is an opportunity to enhance the company's capabilities if aligned with the business strategy. Nonetheless, data analytics is generally a daunting task, and results can become obsolete rapidly. Evolving organisational needs, strategic changes due to competition, mergers, acquisitions, and the emergence of new market players can demand new data analytics capabilities for rapid decision-making. This impacts the feasibility and longevity of data analytics projects, as dynamic organisations find it difficult to manage the cost of changes, undermining their confidence in data analytics as a reliable business solution.
**The Advent of Artificial Intelligence**
Artificial intelligence is not a new concept. The first neural network was created in 1950 by Marvin Minsky and Dean Edmonds at Harvard University, simulating 40 neurons on a computer (4). Nowadays, over 80% of organisations see AI as a strategic opportunity, with nearly 85% viewing it as a way to gain a competitive advantage (5).
In the early 2010s, conventional data analytics dominated the field. Nevertheless, AI's emergence was expected to make data analytics more powerful, addressing difficulties unexplained by conventional descriptive and diagnostic analytics. AI and machine learning enhanced new aspects of data analytics, such as predictive and prescriptive analytics, automating data preparation, unification, and organisation. Additionally, AI could automate some parts of the code needed for conventional data analytics projects, reducing errors and accelerating development, thus helping organisations remain competitive. By analysing historical data and current business priorities, AI can suggest actions to enhance company performance (6).
|Notes|
|------------|
|Artificial Intelligence (AI) is transforming various sectors. For example, in education, AI analyses student data, including scores and other relevant information, to suggest improvements in learning methods and automate tasks such as tracking student performance. In retail, AI improves demand forecasting and personalises product recommendations to enhance inventory management. In manufacturing, AI predicts when machines need maintenance and oversees factory operations through image recognition. In healthcare, AI assists in diagnosing conditions and allocates resources for patient care. In telecommunications, AI optimises service quality through maintenance and operational efficiencies. In banking, AI enhances customer service by efficiently routing calls, detects fraud, and customises financial assessments for credit eligibility.|
**Barriers to AI Adoption**
Despite its potential benefits, AI adoption faces several challenges. As of 2022, only 8% of companies in the EU used at least one AI technology. Early adopters of AI have applied it to stock market analysis, valuing real options, and fraud detection. Smaller companies are less likely to adopt AI. For instance, in Austria, 92% of small companies, 85% of medium-sized companies, and 74% of large companies have not yet considered using AI. Common challenges include high development costs, lack of skilled staff, management and legal risks, and ineffective data management practices (7).
These data management challenges, a barrier to AI adoption, are connected with issues in implementing conventional data analytics projects. If an organisation cannot effectively implement conventional data analytics projects and foster a data culture, it is unlikely to succeed in implementing advanced data analytics projects, where AI plays a crucial role. A strong indicator of a mature data culture is the industrialisation of conventional data analytics projects, where the company routinely reuses procedures and development components as similar cases arise. This standardises knowledge and increases production, indicating that the company has achieved a level of stability necessary for implementing advanced data analytics projects powered by AI (8).
**Generative AI as part of the solution**
Organisations that use third-party IT infrastructure often consume cloud solutions from providers like Amazon, Google, and Microsoft. These providers offer three categories of services: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). Not surprisingly, they are integrating generative AI into their services. For example, Microsoft's $11 billion investment since 2019 in an exclusive partnership with OpenAI illustrates how cloud providers are enhancing their services with generative AI.
|Notes|
|------------|
|Generative AI uses advanced techniques in natural language processing (NLP) and machine learning to create different types of content, such as text, images, audio, and synthetic data, based on prompts or questions. It can be used for many purposes, like writing articles, powering chatbots, creating art and designs, composing music, generating speech, and making synthetic data for training and testing AI models.|
Combining these services allows cloud-based enterprises to leverage IT solutions more effectively. Generative AI algorithms can interact with the cloud in a more human-like manner, making data interaction, access, and outputs more intuitive. Additionally, using the cloud infrastructure to create AI models offers benefits such as scaling computing resources up or down depending on the needs, providing flexibility and cost efficiencies. This adaptability is particularly advantageous for clients keen on using AI to improve the industries they operate in. By integrating generative AI with cloud services, organisations can optimise their operations and maintain competitiveness in a rapidly evolving technological landscape (9).
**Data Preparation for enhanced Business Intelligence powered by AI**
A typical AI business case often includes a clear application description, how the company will use it, the required data, and an AI expert to identify the best-fit algorithm. Pursuing an AI case incompatible with AI techniques can lead to failure, with non-existent, uncertain, or unpredictable results.
Can a company use AI technologies if it has varying data quality? Even if the data is not clean or is difficult to process, which is common in companies with emerging data cultures, AI technologies can still be valuable. Both Generative AI and machine learning models can be combined to assist in cleaning processes, standardising, and labelling unstructured data. While assessing quality after these steps can be complex, the use of AI can significantly enhance the overall data analytics efforts and improve project outcomes. This effort can increase the initial cost of AI-driven projects, especially in cleaning and organising data, which is incomplete or inconsistent (10). Compared to the conventional data analytics era, this is advantageous because AI can handle and process more varied data types. Although more unstructured and incoherent data may require additional resources and costs, and extend the time before AI projects start delivering value, the long-term benefits of leveraging AI technologies make it a worthwhile investment.
|Notes|
|------------|
|A business case highlighting the importance of data culture in one of Germany's largest utility firms demonstrates that a key factor behind the firm's AI maturity is its data-driven approach. This includes efforts to make the workforce see data as a valuable resource and the development of a digital infrastructure that supports strategic changes. These changes enable employees to participate in the data revolution as ambassadors of AI use cases that add value to the organisation. The spread of data culture within the firm has led to successful AI project implementations, supported by 3,000 rules that define good quality data, making it more visible and objective. The automation of digital and data processes is evident in three key data-driven decision support systems: real-time operations for performance stability, maintenance, replacement and repair of components, and long-term asset management. As more decisions become automated, clear responsibilities for decisions ensure accountability and organisation (10a).|
**Conclusion**
The transition from traditional data analytics to advanced data analytics powered by artificial intelligence presents significant opportunities for organisations. AI can automate many operational tasks, offering improved value and efficiency. Additionally, the emergence of generative AI models and their integration with cloud services can enable unprecedented scenarios for delivering value from data analytics projects faster and more powerfully than ever before. However, successful AI adoption still requires a robust data culture within companies. While advanced technologies can mitigate challenges associated with an underdeveloped data culture, establishing a strong data culture is crucial, even before developing AI solutions. By fostering this culture, businesses can fully leverage AI to achieve their strategic goals and remain competitive in a rapidly evolving technological environment.
**Sources**
(1) Tuncay Bayrak (2015), A review of Business Analytics: A Business Enabler or Another Passing Fad
Consulted on 22/06/2024
URL: [Link](https://www.sciencedirect.com/science/article/pii/S1877042815038331)
(2) Dennis et al. (2012), System Analysis and Design
(3) Ralph Schroeder (2015), Big data business models: Challenges and opportunities
Consulted on 22/06/2024
URL: [Link](https://www.tandfonline.com/doi/full/10.1080/23311886.2016.1166924)
(4) Chandeepa Dissanayake (2021), Artificial Intelligence, a brief overview of the discipline
Consulted on 22/06/2024
URL: [Link](https://www.researchgate.net/profile/Chandeepa-Dissanayake-2/publication/368852628_Artificial_Intelligence_-_A_Brief_Overview_of_the_Discipline/links/63fe13550d98a97717c5ba9d/Artificial-Intelligence-A-Brief-Overview-of-the-Discipline.pdf)
(5) Ida Merete Enholm et al. (2021), Artificial Intelligence and Business Value: a Literature Review
Consulted on 22/06/2024
URL: [Link](https://link.springer.com/article/10.1007/s10796-021-10186-w?trk=public_post_comment-text)
(6) Mariya Yao et al. (2018), Applied Artificial Intelligence, a handbook for business leaders
(6a) David Oyekunle et al. (2024): Digital Transformation Potential: The role of Artificial Intelligence in Business
Consulted on 22/06/2024
URL: [Link](https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4806733)
(7) Rudolf Grünbichler et al. (2023), Implementation barriers of artificial intelligence in companies
Consulted on 22/06/2024
URL: [Link](https://www.researchgate.net/profile/Gruenbichler-Rudolf/publication/371958928_IMPLEMENTATION_BARRIERS_OF_ARTIFICIAL_INTELLIGENCE_IN_COMPANIES/links/649ed4abb9ed6874a5eb4517/IMPLEMENTATION-BARRIERS-OF-ARTIFICIAL-INTELLIGENCE-IN-COMPANIES.pdf)
(8) Mathieu Bérubé et al. (2021), Barriers to the Implementation of AI in Organisations: Findings from a Delphi Study
Consulted on 23/06/2024
URL: [Link](https://scholarspace.manoa.hawaii.edu/items/1305e043-f68e-4485-bf7a-49e1e55c33ee)
(9) Christophe Carugati et al. (2023), The competitive relationship between cloud computing and generative AI
Consulted on 23/06/2024
URL: [Link](https://www.jstor.org/stable/resrep55201?seq=4)
(10) Sulaiman Abdallah Alsheibani et al. (2020), Winning AI Strategy: Six-Steps to create value from Artificial Intelligence
Consulted on 23/06/2024
URL: [Link](https://core.ac.uk/download/pdf/326836031.pdf)
(10a) Philipp Staudt et al. (2024), How a Utility Company Established a Corporate Data Culture for Data-Driven Decision Making
Consulted on 23/06/2024
URL: [Link](https://aisel.aisnet.org/cgi/viewcontent.cgi?article=1582&context=misqe) | jestevesv |
1,897,341 | COMPUTER MEMORY | Computer memory stores information, such as data and programs, for immediate use in the computer. The... | 0 | 2024-06-22T22:11:59 | https://dev.to/michweb/computer-memory-45d8 | Computer memory stores information, such as data and programs, for immediate use in the computer. The term memory is often synonymous with the terms RAM, main memory, or primary storage. Archaic synonyms for main memory include core and store.
RAM. Specifically, RAM stands for “Random Access Memory” or “Ready Access Memory”. It is a temporary notepad where your computer sends information to disk | michweb | |
1,897,337 | How to get test net coins | Please how do I get a testnet coins for testing my decentralized application before switching to live | 0 | 2024-06-22T21:27:42 | https://dev.to/uthmancpder/how-to-get-test-net-coins-2d6a | web3, smartcontract, blockchain, javascript | Please how do I get a testnet coins for testing my decentralized application before switching to live | uthmancpder |
1,897,336 | Exploring Option Constructors in Effect-TS | Handling Optional Values with Effect-TS In functional programming, handling optional... | 0 | 2024-06-22T21:22:05 | https://dev.to/almaclaine/exploring-option-constructors-in-effect-ts-4ka0 | effect, typescript, javascript, functional | ## Handling Optional Values with Effect-TS
In functional programming, handling optional values safely and concisely is crucial. The Option type in Effect-TS provides a robust way to work with values that may or may not be present. This article explores various constructors provided by Effect-TS to create and manipulate Option types.
## What is an Option?
An Option type represents a value that may or may not exist. It encapsulates an optional value with two possible states:
- `Some(value)`: Represents a value that exists.
- `None`: Represents the absence of a value.
## Option Constructors in Effect-TS
Effect-TS offers several constructors to create Option types from different contexts. Below are some practical examples:
### Example 1: Creating an Option with a Value
The `O.some` function wraps a value into an Option, indicating that the value is present.
```typescript
import { Option as O } from 'effect';
function constructors_ex01() {
const some = O.some(1); // Create an Option containing the value 1
console.log(some); // Output: Some(1)
}
```
### Example 2: Creating an Option with No Value
The `O.none` function creates an Option that represents the absence of a value.
```typescript
import { Option as O } from 'effect';
function constructors_ex02() {
const none = O.none(); // Create an Option representing no value
console.log(none); // Output: None
}
```
### Example 3: Creating an Option from a Nullable Value
The `O.fromNullable` function converts a nullable value (null or undefined) into an Option.
```typescript
import { Option as O } from 'effect';
function constructors_ex03() {
const some = O.fromNullable(1); // Create an Option containing the value 1
const none = O.fromNullable(null); // Create an Option representing no value
const none2 = O.fromNullable(undefined); // Create an Option representing no value
console.log(some); // Output: Some(1)
console.log(none); // Output: None
console.log(none2); // Output: None
}
```
### Example 4: Creating an Option from an Iterable
The `O.fromIterable` function creates an Option from an iterable collection, returning the first value if the collection is not empty.
```typescript
import { Option as O } from 'effect';
function constructors_ex04() {
const some = O.fromIterable([1]); // Create an Option containing the first value of the array [1]
const some2 = O.fromIterable([1, 2, 3]); // Create an Option containing the first value of the array [1, 2, 3]
const none = O.fromIterable([]); // Create an Option representing no value from an empty array
console.log(some); // Output: Some(1)
console.log(some2); // Output: Some(1)
console.log(none); // Output: None
}
```
### Example 5: Lifting a Nullable Function into an Option
The `O.liftNullable` function converts a function that may return a nullable value into a function that returns an Option.
```typescript
import { Option as O, pipe } from 'effect';
function constructors_ex05() {
const some = pipe(() => 1, O.liftNullable)(); // Create an Option containing the value 1
const none = pipe(() => null, O.liftNullable)(); // Create an Option representing no value
console.log(some); // Output: Some(1)
console.log(none); // Output: None
}
```
### Example 6: Lifting a Throwable Function into an Option
The `O.liftThrowable` function converts a function that may throw an error into a function that returns an Option.
```typescript
import { Option as O, pipe } from 'effect';
function constructors_ex06() {
const some = pipe(() => 1, O.liftThrowable)(); // Create an Option containing the value 1
const none = pipe(() => {
throw new Error('none');
}, O.liftThrowable)(); // Create an Option representing no value due to an error
console.log(some); // Output: Some(1)
console.log(none); // Output: None
}
```
## Additional Examples
### Example 7: Lifting a Complex Nullable Function
Here’s a more complex example using `O.liftNullable` with a function that parses a string into a number.
```typescript
import { Option as O } from 'effect';
function constructors_ex07() {
const parseNumber = O.liftNullable((s: string) => {
const n = parseInt(s, 10);
return isNaN(n) ? null : n; // Return null if parsing fails, otherwise return the number
});
const some = parseNumber('123'); // Create an Option containing the parsed number 123
const none = parseNumber('abc'); // Create an Option representing no value due to parsing failure
console.log(some); // Output: Some(123)
console.log(none); // Output: None
}
```
### Example 8: Lifting a Throwable Function for JSON Parsing
Using `O.liftThrowable`, we can handle functions that might throw errors, such as JSON parsing.
```typescript
import { Option as O } from 'effect';
function constructors_ex08() {
const parse = O.liftThrowable(JSON.parse);
const some = parse('{"key": "value"}'); // Create an Option containing the parsed JSON object
const none = parse('invalid json'); // Create an Option representing no value due to JSON parsing error
console.log(some); // Output: Some({ key: 'value' })
console.log(none); // Output: None
}
```
### Conclusion
The Option type in Effect-TS provides a powerful way to handle optional values in a type-safe and expressive manner. By leveraging the various constructors, you can create and manipulate Option types effectively, ensuring that your code handles the presence or absence of values gracefully. While this approach may increase verbosity, the benefits in terms of reliability, safety, and maintainability are well worth it, especially for complex and high-value software systems. Moreover, this style of programming
| almaclaine |
1,897,333 | AI-powered market analysis for currency pairs with Hono.js, Cloudflare Workers and Twilio | This is a submission for Twilio Challenge v24.06.12 What I Built Nomisma is a... | 0 | 2024-06-22T21:17:03 | https://dev.to/desmondsanctity/ai-powered-market-analysis-for-currency-pairs-with-honojs-cloudflare-workers-and-twilio-5edo | devchallenge, twiliochallenge, ai, twilio | *This is a submission for [Twilio Challenge v24.06.12](https://dev.to/challenges/twilio)*
## What I Built
Nomisma is a cutting-edge AI-driven application that delivers real-time market analysis and updates on currency pairs directly to your WhatsApp. This innovative tool leverages the power of Hono.js, Twilio serverless functions, WhatsApp API, and Cloudflare Workers AI to provide users with timely and insightful financial information.
### Key Features:
- Real-Time Market Analysis: Receive the latest updates on currency pairs, including bid, ask, and mid prices. Detailed analysis to help you make informed decisions on currency trading.
- WhatsApp Integration: Get all your updates and analysis sent directly to your WhatsApp for convenient and immediate access. Ensures you are always in the loop, no matter where you are.
- User-Friendly Interface: Simple and intuitive UI for setting up your preferences and managing notifications. Built using Hono.js for a smooth and responsive user experience.
- Serverless and Scalable: Utilizes Twilio's serverless functions for efficient and scalable communication handling. Cloudflare Workers AI ensures robust and fast processing of market data and analysis.
### Use Cases:
- Traders: Stay updated with the latest market trends and data for informed trading decisions.
- Financial Analysts: Get regular insights into currency pairs to aid in market research and analysis.
- Investors: Receive timely updates on currency pairs to monitor investments and market movements.
## Demo
<!-- Share a link to your app and include some screenshots here. -->
{% embed https://github.com/DesmondSanctity/tyche-nomisma %}
You can find the live solution here - [Nomisma](https://tyche-nomisma.0xanon.workers.dev)
## Twilio and AI
How It Works...
### Setup:
- Users sign up and provide their WhatsApp number for receiving notifications.
- Select the currency pairs you are interested in and the intervals at which you want to receive updates.
### Notification and Analysis:
- The AI processes market data and generates insightful analysis for the selected currency pairs.
- Notifications are sent to your WhatsApp, ensuring you have accurate information at your fingertips.
### Technology Stack:
- Hono.js: Provides a fast, flexible, and scalable web framework for building the application.
- Twilio ([Serverless Functions](https://www.twilio.com/docs/serverless) & [WhatsApp API](https://www.twilio.com/docs/whatsapp/quickstart)): Handles the communication and delivery of notifications via WhatsApp.
- Cloudflare Workers AI: Ensures efficient data processing and AI-driven market analysis. I used the [@cf/meta/llama-3-8b-instruct](https://developers.cloudflare.com/workers-ai/models/llama-3-8b-instruct/) for the analysis generation.
## Additional Prize Categories
This submission qualifies for:
- Twilio Times Two: I used Twilio serverless function to host the messaging service to make it easily scalable when there are many users. I also used the WhatsApp API for the communication between the app and the users.
- Impactful Innovators: This app is very innovative for getting deep market insight and analysis using AI and APIs that offer historical data. It can be used by traders, investors, and analysts to keep up to date with fundamental, technical, and trend analysis without having to do much work. | desmondsanctity |
1,897,332 | 3 Tips to make your Repositories Stand out | Well in the Last Post about how you can make your Github Repository Stand out, I basically listed 2... | 27,749 | 2024-06-22T21:13:51 | https://dev.to/nhelchitnis/3-tips-to-make-your-repositories-stand-out-449e | tips, github, beginners | Well in the Last Post about how you can make your Github Repository Stand out, I basically listed 2 tips that can help you out with that. I think it's time to add one more, don't you think? Don't worry the first two are the same, but the last one will be different.
### Tip One Get Rid of everything you are not using
Getting rid of things you are not using will help people not click on something and then just leave.
### Tip Two Have a Brief but in depth description
Having a Brief but in depth description will help more people come to your Repository and Star and Fork it.
### Tip Three Don't spam people on Twitter, Instagram, Facebook or other Social Media apps
Now I know what your thinking "But Nathan we should do this so more people know about the project and how contributions are welcome." Well that's great and all but if you constantly spam people it will actually have a different affect on you as more people will actually go away from your Repositories.
Well that's it,
See you later,
Bye
| nhelchitnis |
1,896,853 | Mastering Prompting & Training in LLMs - II | Prompting and Training in Language Models: Guiding and Enhancing LLM Performance Welcome... | 0 | 2024-06-22T20:59:56 | https://dev.to/mahakfaheem/mastering-prompting-training-in-llms-ii-nk4 | beginners, ai, devops, learning | ### Prompting and Training in Language Models: Guiding and Enhancing LLM Performance
Welcome back to our series on Generative AI and Large Language Models (LLMs). In the previous [blog](https://dev.to/mahakfaheem/transform-fomo-into-confidence-with-llms-i-31ee), we laid the foundation by exploring the fundamental concepts and architectures underpinning modern NLP technologies. We delved into the Transformer architecture, embeddings, and vector representations, providing insight into how these models predict and generate human-like text. Now, let's move forward to understand two critical aspects of working with LLMs: **Prompting** and **Training**.
### Introduction to Prompting and Training
When we interact with language models, two key activities shape their effectiveness: prompting and training. Prompting involves crafting specific inputs to guide the model's responses, while training adjusts the model's parameters to improve its performance. Both approaches play vital roles in optimizing LLMs for various tasks, making them more accurate, relevant, and useful.
### Understanding Prompting
Prompting is the process of influencing an LLM’s output by providing specific input structures. This manipulation affects the distribution over the vocabulary, steering the model towards generating desired types of outputs. Effective prompting ensures that the model produces contextually appropriate and precise responses, improving its utility and reliability.
#### What is Prompt Engineering?
Prompt engineering is the art and science of designing prompts to achieve optimal model performance. It requires understanding how language models interpret and respond to inputs, allowing users to tailor prompts that elicit the best possible responses.
#### Prompt Engineering Techniques
**`In-Context Learning:`** Providing examples within the prompt itself to illustrate the desired response pattern. This helps the model understand the task better.
**`K-Shot Prompting:`** Including a fixed number of examples (k examples) in the prompt to show the model what kind of output is expected. This method is effective in few-shot learning scenarios.
#### Advanced Prompting Strategies
**`Chain of Thought Prompting:`** Encouraging the model to generate a sequence of reasoning steps to arrive at the final answer. This enhances the model's ability to handle complex tasks requiring multi-step reasoning.
**`Least to Most Prompting:`** Starting with simple prompts and gradually increasing the complexity. This helps the model build on its previous responses, improving accuracy and coherence in more complex scenarios.
**`Step Back Prompting:`** Instructing the model to reconsider its previous response and refine it. This can be useful for improving the quality of the output by making the model self-correct.
### Exploring Training Techniques
Training involves adjusting the model's parameters based on large datasets to enhance its performance across various tasks. Different training styles can be employed, each with its unique advantages and use cases.
#### Fine-Tuning
Fine-tuning involves training a pre-trained language model on a smaller, task-specific dataset to adapt it to a particular application. This process adjusts all the model's parameters, making it highly specialized for the given task.
- **`Advantages:`** High accuracy and performance on specific tasks.
- **`Disadvantages:`** Computationally expensive, requires substantial labeled data, risk of overfitting.
#### Parameter-Efficient Fine-Tuning
This approach adjusts only a subset of the model's parameters, making the process more efficient while maintaining performance.
- **`Advantages:`** Reduced computational and memory requirements, faster training times.
- **`Disadvantages:`** May not achieve the same level of task-specific performance as full fine-tuning.
#### Soft Prompting
Soft prompting involves learning continuous prompt embeddings optimized for a specific task. Unlike hard prompts, which are fixed textual inputs, soft prompts are dynamic and can be fine-tuned along with the model.
- **`Advantages:`** Flexible, efficient in terms of computational resources.
- **`Disadvantages:`** Complexity in designing and optimizing prompt embeddings.
#### Continual Pretraining
Extends the training of a model with additional general-domain or domain-specific data after the initial pretraining phase. This technique helps the model stay updated and relevant with new information.
- **`Advantages:`** Keeps the model updated, improves generalization and robustness.
- **`Disadvantages:`** Requires significant computational resources, risk of overfitting.
#### Low-Rank Adaptation (LoRA)
LoRA is a parameter-efficient fine-tuning method that reduces the number of parameters needed by decomposing weight matrices into lower-rank matrices during training.
- **`Advantages:`** Significantly reduces the number of trainable parameters, decreases memory and computational requirements.
- **`Disadvantages:`** May be less flexible compared to full fine-tuning in certain complex tasks.
### Comparative Analysis of Training Methods
To better understand the implications of these training methods, let's compare their hardware costs across different model sizes in terms of CPU, GPU, and time.
| Model Size | Pretraining (CPU/GPU/Time) | Fine-Tuning (CPU/GPU/Time) | Parameter-Efficient Fine-Tuning (CPU/GPU/Time) | Soft Prompting (CPU/GPU/Time) | Continual Pretraining (CPU/GPU/Time) | LoRA (CPU/GPU/Time) |
|------------|--------------------------------------|-------------------------------------|-----------------------------------------------|--------------------------------------|----------------------------------------------|-----------------------------------|
| 100M | Low (few CPUs/GPUs, days) | Low (few CPUs/GPUs, hours-days) | Very Low (single CPU/GPU, hours) | Very Low (single CPU/GPU, hours) | Low (few CPUs/GPUs, days-weeks) | Very Low (single CPU/GPU, hours) |
| 10B | High (many CPUs/GPUs, weeks-months) | Moderate (several GPUs, days-weeks) | Low (few GPUs, hours-days) | Low (few GPUs, hours-days) | Moderate (several GPUs, weeks-months) | Low (few GPUs, hours-days) |
| 150B | Very High (large clusters, months+) | High (many GPUs, weeks-months) | Moderate (several GPUs, days-weeks) | Moderate (several GPUs, days-weeks) | High (many GPUs, months+) | Moderate (several GPUs, days-weeks) |
#### Explanation of Costs:
- **`Pretraining Cost:`** The initial training cost on large datasets. Larger models require exponentially more computational resources, often involving large clusters of GPUs over extended periods.
- **`Fine-Tuning Cost:`** The cost of adapting the model to specific tasks. Full fine-tuning involves adjusting all parameters, which is resource-intensive but necessary for high accuracy in specific tasks.
- **`Parameter-Efficient Fine-Tuning Cost:`** Lower than full fine-tuning as it adjusts fewer parameters. Typically involves fewer GPUs and shorter training times.
- **`Soft Prompting Cost:`** Generally lower as it involves optimizing prompt embeddings rather than the entire model, making it efficient in terms of computational resources and time.
- **`Continual Pretraining Cost:`** Can be high due to the need for ongoing data processing and model updates. Requires a substantial amount of computational power over long periods.
- **`LoRA Cost:`** Lower due to the reduction in the number of parameters trained, making it resource-efficient while maintaining high performance. Typically requires fewer GPUs and shorter training times.
### Conclusion
Mastering prompting and training in language models is essential for unlocking their full potential. By understanding and implementing effective prompting strategies, such as in-context learning, k-shot prompting, and advanced techniques like chain of thought and step back prompting, we can significantly enhance the performance and utility of these models. Additionally, choosing the appropriate training style—whether fine-tuning, parameter-efficient fine-tuning, soft prompting, continual pretraining, or LoRA—allows us to tailor the model's capabilities to our specific needs while managing resource constraints.
In the upcoming blogs of this series, we'll continue to explore the nuances of Generative AI and LLMs, diving deeper into practical applications and advanced techniques.
Thanks for reading, and I look forward to your continued journey through this series. | mahakfaheem |
1,897,329 | Introduction to Options in Effect | What is an Option? An Option type represents a value that may or may not be present. It is... | 0 | 2024-06-22T20:58:56 | https://dev.to/almaclaine/introduction-to-options-in-effect-3g1j | effect, typescript, javascript, functional | # What is an Option?
An Option type represents a value that may or may not be present. It is a functional programming concept used to handle optional values in a type-safe way. In TypeScript, the `Option` type is an Algebraic Data Type (ADT), which allows for two distinct cases:
- `Some<A>`: Indicates that there is a value of type `A`.
- `None`: Indicates the absence of a value.
## History of Optionals
The concept of optionals originated from the Haskell programming language, where it is known as the Maybe type. Introduced in the 1990s, Maybe is an algebraic data type that represents an optional value with two constructors: Just a for a value of type a and Nothing for the absence of a value. This innovation allowed Haskell programmers to handle missing or optional values explicitly, avoiding the pitfalls of null references.
Following Haskell, many other languages adopted the concept of optional types:
- **Scala**: Introduced the Option type, similar to Haskell's Maybe, with `Some[A]` and `None`.
- **Rust**: Included an Option type with `Some(T)` and `None`, integral to its safety guarantees.
- **Swift**: Introduced Optional types to handle the presence and absence of values explicitly.
- **Java**: Added the Optional class in Java 8 to avoid null pointer exceptions.
By adopting optional types, these languages promote safer and more robust code by encouraging developers to handle optional values explicitly.
## Why Use Options?
Options are useful for:
- Avoiding `null` or `undefined` values: By using `Option` types, you can handle the absence of values explicitly.
- Type Safety: Options provide compile-time guarantees that you handle both presence and absence cases, reducing runtime errors.
- Chaining Operations: Options support various functional methods that allow you to chain operations in a clear and concise manner.
## Internal Representation
An Option in TypeScript can be either a `Some` or a `None`. These are defined as interfaces with specific tags to ensure type safety and clear distinction between the presence and absence of a value.
```typescript
export type Option<A> = None | Some<A>
export interface None{
readonly _tag: "None"
}
export interface Some<out A> {
readonly _tag: "Some"
readonly value: A
}
```
## Key Concepts
- **Algebraic Data Types (ADTs)**: ADTs like `Option` allow you to define types that can be one of several different but fixed types. In the case of Option, it can be either Some or None.
- **Tagging**: Each variant of the Option type has a _tag property (`Some` or `None`) which makes it easy to distinguish between them. This is known as "tagging" and is a common practice in defining ADTs.
## Union Types and Type Safety
Union types in TypeScript allow a variable to hold one of several types, ensuring that only valid operations for the specific type are performed. By defining Option as a union of `None` and `Some<A>`, we achieve a clear, type-safe representation of optional values.
- **Distinct Tagging**: Each variant of the Option type has a _tag property, either `None` or `Some`, which serves as a unique identifier. This tagging mechanism allows TypeScript's type checker to distinguish between the two variants at compile time, enforcing correct handling of each case.
- **Exhaustive Pattern Matching**: When you handle an Option type, TypeScript ensures that you address both the Some and None cases. This exhaustive pattern matching reduces the risk of runtime errors due to unhandled cases. Here's an example of pattern matching using
**Typescript Switch**:
```typescript
function match<A, B>(
option: Option<A>,
handlers: { onNone: () => B; onSome: (value: A) => B }
): B {
switch (option._tag) {
case "None":
return handlers.onNone();
case "Some":
return handlers.onSome(option.value);
default:
// This line ensures that if a new variant is added, TypeScript will catch it at compile time
const exhaustiveCheck: never = option;
throw new Error(`Unhandled case: ${exhaustiveCheck}`);
}
}
```
**Effect match**:
```typescript
// Effect-TS match function
import { Option as O } from "effect/Option";
// Example usage
const myOption: O.Option<number> = O.some(5);
// Using Effect-TS match function
const effectResult = O.match({
onNone: () => "No value",
onSome: (value) => `Value is: ${value}`
})(myOption);
console.log(effectResult); // Output: Value is: 5
```
- **Type Guards**:
TypeScript provides the ability to define type guards, which are functions that refine the type of a variable within a conditional block. For the Option type, we can define type guards to check whether an instance is `None` or `Some`:
```typescript
const myOption: Option<number> = getSomeOption();
if (isSome(myOption)) {
console.log(`Value is: ${myOption.value}`);
} else {
console.log("No value present");
}
```
- **Preventing Null or Undefined**:
The use of `Option` types eliminates the need for `null` or `undefined` to represent the absence of a value. This explicit handling of optional values ensures that functions and variables do not silently fail or cause errors due to unexpected `null` or `undefined` values.
- **Functional Methods**:
The Option type supports various functional methods, such as `map`, `flatMap`, `orElse`, and `getOrElse`, which allow you to work with optional values in a compositional and type-safe manner. These methods ensure that any transformation or access of the optional value is safely managed:
## Summary: Value of Having a Unifying Type for Absence in TypeScript
Using a unifying type for absence, such as `None` in the `Option` type, in TypeScript ensures explicit handling of both presence and absence of values, enhancing type safety by providing compile-time checks that prevent errors associated with null or undefined values. This approach improves code readability and maintainability by making it clear when a value might be absent and how such cases should be handled, leading to more reliable and robust software.
## Basic Operations
Creating Options:
- `none()`: Creates a None instance representing the absence of a value.
- `some(value: A)`: Creates a Some instance wrapping a value of type A.
Type Guards:
- `isOption(input: unknown)`: input is `Option<unknown>`: Checks if a value is an Option.
- `isNone(self: Option<A>)`: self is `None<A>`: Checks if an Option is None.
- `isSome(self: Option<A>)`: self is `Some<A>`: Checks if an Option is Some.
Pattern Matching:
- `match(self: Option<A>, { onNone, onSome })`: B | C: Matches an `Option` and returns either the `onNone` value or the result of the `onSome` function.
## Chaining Operations
Options provide several methods for chaining operations, allowing for fluent handling of optional values:
- `map`: Transforms the value inside a Some, if present, and returns a new Option.
```typescript
map<A, B>(self: Option<A>, f: (a: A) => B): Option<B>
```
- `flatMap`: Applies a function that returns an Option and flattens the result.
```typescript
flatMap<A, B>(self: Option<A>, f: (a: A) => Option<B>): Option<B>
```
- `orElse`: Provides an alternative `Option` if the original is `None`.
```typescript
orElse<A, B>(self: Option<A>, that: LazyArg<Option<B>>): Option<A | B>
```
- `getOrElse`: Returns the value inside `Some` or a default value if `None`.
```typescript
getOrElse<A, B>(self: Option<A>, onNone: LazyArg<B>): A | B
```
## Practical Example
```typescript
import { Option as O} from "effect"
const parsePositive = (n: number): Option<number> =>
n > 0 ? O.some(n) : O.none()
const result = parsePositive(5)
if (O.isSome(result)) {
console.log(`Parsed positive number: ${result.value}`)
} else {
console.log("Not a positive number")
}
```
In this example, parsePositive returns an Option. By using isSome, we can safely handle the value if it exists, or handle the absence of a value otherwise.
## Higher Order Functionality and Emergent Behavior
This style of programming not only increases verbosity but also lends itself to higher-order patterns and emergent behavior. By explicitly handling all cases and enhancing type safety, developers can more easily compose functions and abstractions, leading to more sophisticated and powerful software architectures. These higher-order patterns enable emergent behavior, where complex and adaptive functionality arises naturally from simpler components, essential for building high-value and complex systems.
## Concerning verbosity
While using a unifying type like None in the `Option` type increases verbosity, it offers significant benefits for high-value or complex software. This approach ensures explicit handling of all possible cases, enhances type safety with compile-time checks, and improves code readability and maintainability. These advantages lead to more reliable, robust, and maintainable software, which is crucial for complex systems where reliability is paramount.
## Conclusion
Options provide a robust and type-safe way to handle optional values in TypeScript. By leveraging the functional programming methods provided by Options, you can write more reliable and maintainable code, avoiding common pitfalls associated with null and undefined values.
| almaclaine |
1,897,331 | Top 3 Ngrok alternatives | Ngrok is an ingress-as-a-service tool that provides tunnels for instant access to your apps on any... | 0 | 2024-06-22T20:58:43 | https://dev.to/ghoshbishakh/top-3-ngrok-alternatives-499e | devops, tooling, webdev, development | Ngrok is an ingress-as-a-service tool that provides tunnels for instant access to your apps on any cloud, private network, or device. It allows you to share your website or app from localhost and supports use cases like connecting to IoT devices behind NAT/firewalls, receiving webhooks, and debugging HTTP requests. Recently, Ngrok expanded to include API gateways, firewalls, and load balancing for on-premise apps. Despite its maturity, Ngrok can be complex.
This article explores the top 10 Ngrok alternatives for 2024, covering their features, installation processes, ease of use, and pricing to help you choose the best option.
## 1. Pinggy
[Pinggy.io](https://pinggy.io) is a tunneling tool that provides a public address to access your localhost, even behind a NAT or firewall, with a single command. We do not need to download anything either. This Ngrok alternative allows users to access their website or app hosted on localhost without needing to configure the cloud, port forwarding, DNS, or VPN.
For example, to share a React app running on localhost:3000, you can use Pinggy with the following command:
`ssh -p 443 -R0:localhost:3000 a.pinggy.io`
Here is a video tutorial:
{% youtube x7nLtYb-23c %}
Pinggy supports all advanced features such as web-debugger, custom domains, TCP tunnels, IP Whitelisting, Key Authentication, Password authentication, etc. Overall, Pinggy is the best ngrok alternative from a feature as well as value for money perspective.
## 2. Localtunnel
[Localtunnel](https://localtunnel.github.io/www/) is an alternative to Ngrok that is available as an npm package. It enables the creation of HTTP/HTTPS tunnels to localhost and generates a random subdomain when run from the terminal. As a Node.js package, Localtunnel can be integrated into your applications as a library, making it useful for testing your Node.js apps.
## 3. Localtonet
The advantage of [Localtonet](https://localtonet.com/) is that it offers UDP tunnels as well. Users can use UDP tunnels to host multiplayer games on localhost. It also offers features like custom subdomains, password protection, and usage analytics to enhance security and usability. Designed to be user-friendly, Localtonet is ideal for developers who need a reliable and straightforward solution for exposing local applications to the web. | ghoshbishakh |
1,896,048 | Pull images from private docker registry in Kubernetes cluster 🐳 | When working with Kubernetes, especially for deploying applications, authenticating with private... | 0 | 2024-06-22T20:49:26 | https://dev.to/vaggeliskls/pull-images-from-private-docker-registry-in-kubernetes-cluster-25al | kubernetes, authentication, cloud, helm | When working with Kubernetes, especially for deploying applications, authenticating with private image repositories is often necessary. This process is crucial for AWS ECR registries and other Docker-related registries. This post introduces a Helm chart designed to simplify and streamline this authentication process, making your workflow smoother.
📦 Helm Chart Repository: `oci://registry-1.docker.io/vaggeliskls/k8s-registry-auth`
Remember to star ⭐ this Helm chart if you find it useful! More info available at [GitHub](https://github.com/vaggeliskls/k8s-registry-auth).
## Supported Image Registries 🌐
This Helm chart mainly supports AWS ECR registries, but it also includes support for other popular registries. Specifically, it has been tested with the following registries:
1. Amazon ECR
2. JFrog Artifactory
3. Nexus
4. Docker Hub
While it has not yet been tested with the following registries, initial support is available:
5. Harbor
6. IBM Cloud Container Registry
Furthermore, future support is planned for:
7. Google Artifact Registry
8. Azure Container Registry
It's important to note for those using AWS ECR registries that re-authentication is required every 12 hours. To address this, the Helm chart includes a cronjob that refreshes the login automatically, ensuring you are always authenticated to your registry.
## Prerequisites 🛠️
[Helm version 3](https://helm.sh/docs/intro/install/) or higher must be installed on your system before proceeding.
## Using the Helm Chart 🚀
### Configuration
Configure the registry field to specify the target registry for authentication. You can set registry credentials in two ways:
1. **Using an Existing Secret**
2. **Providing Static Username and Password in values.yaml**
For [examples](https://github.com/vaggeliskls/k8s-registry-auth/wiki/Examples) for both AWS ECR and generic Docker registries, see the dedicated examples section.
## Examples
### AWS ECR
Assuming your Helm is set up correctly, use one of the following commands:
**For existing secrets:**
```
helm upgrade --install k8s-registry-auth oci://registry-1.docker.io/vaggeliskls/k8s-registry-auth --set registry=123456789123.dkr.ecr.region.amazonaws.com --set awsEcr.enabled=true --set secretConfigName=secret-name
```
**For static credentials:**
```
helm upgrade --install k8s-registry-auth oci://registry-1.docker.io/vaggeliskls/k8s-registry-auth --set registry=123456789123.dkr.ecr.region.amazonaws.com --set awsEcr.enabled=true --set registryUsername=username --set registryPassword=password
```
> Replace `123456789123.dkr.ecr.region.amazonaws.com` with your own AWS ECR registry URL. If you're using a specific version of this OCI repository, add `--version 1.0.1`.
### Docker Based Registries Examples
**For existing secrets:**
```
helm upgrade --install k8s-registry-auth oci://registry-1.docker.io/vaggeliskls/k8s-registry-auth --set registry=yourdomain.com --set docker.enabled=true --set secretConfigName=secret-name
```
**For static credentials:**
```
helm upgrade --install k8s-registry-auth oci://registry-1.docker.io/vaggeliskls/k8s-registry-auth --set registry=yourdomain.com --set docker.enabled=true --set registryUsername=username --set registryPassword=password
```
> Replace `yourdomain.com` with your registry's domain name.
## Conclusion
Authenticating image registries doesn't have to be a painful process when deploying applications on Kubernetes. With this Helm chart, you can easily manage and automate this process
| vaggeliskls |
1,897,327 | Versatility in Action: Exploring Key Fields Where MERN Stack Developers Excel | MERN stack developers are well-suited for various fields due to their proficiency in full-stack web... | 0 | 2024-06-22T20:35:55 | https://dev.to/ridoy_hasan/versatility-in-action-exploring-key-fields-where-mern-stack-developers-excel-4bdc | webdev, learning, career, javascript | MERN stack developers are well-suited for various fields due to their proficiency in full-stack web development. Here are some key fields where MERN stack developers excel:
### 1. **Web Development**
- **Front-End Development**: Creating responsive, dynamic user interfaces using React.
- **Back-End Development**: Building robust server-side applications with Node.js and Express.js.
- **Full-Stack Development**: Handling both front-end and back-end development, ensuring seamless integration between the two.
### 2. **Single Page Applications (SPAs)**
- **Dynamic Websites**: Developing interactive and user-friendly websites that provide a smooth user experience without reloading pages.
### 3. **E-Commerce Development**
- **Online Stores**: Building scalable and secure e-commerce platforms with features like shopping carts, payment gateways, and inventory management.
### 4. **Content Management Systems (CMS)**
- **Custom CMS Solutions**: Creating tailored content management systems to manage digital content efficiently.
### 5. **Social Media Platforms**
- **Interactive Social Networks**: Developing social media platforms with real-time updates, user profiles, messaging, and more.
### 6. **Real-Time Applications**
- **Chat Applications**: Building real-time chat applications with features like instant messaging, notifications, and live updates.
- **Collaboration Tools**: Developing tools for real-time collaboration such as document editing and project management platforms.
### 7. **Data-Intensive Applications**
- **Data Visualization**: Creating applications that visualize large datasets, making analyzing and interpreting data easier.
- **Analytics Platforms**: Building platforms to collect, process, and analyze data in real-time.
### 8. **APIs and Microservices**
- **API Development**: Designing and developing RESTful APIs for various applications.
- **Microservices Architecture**: Implementing microservices to build scalable and maintainable applications.
### 9. **Mobile Application Development**
- **React Native**: Using React skills to develop cross-platform mobile applications with React Native.
### 10. **Enterprise Applications**
- **Business Solutions**: Developing enterprise-level applications for CRM, ERP, and other business solutions.
### 11. **Healthcare Applications**
- **Telemedicine**: Building telemedicine platforms for virtual consultations and patient management.
- **Health Monitoring**: Developing applications to monitor and track health metrics in real time.
### Key Skills of MERN Stack Developers:
- **JavaScript Proficiency**: Expertise in JavaScript for both client-side and server-side programming.
- **Database Management**: Skills in handling NoSQL databases like MongoDB.
- **UI/UX Design**: Ability to create intuitive and user-friendly interfaces.
- **API Integration**: Experience in integrating various APIs and third-party services.
- **Version Control**: Proficiency in using version control systems like Git.
- **Problem-Solving**: Strong analytical and problem-solving skills to troubleshoot and debug issues.
Overall, MERN stack developers are versatile and can adapt to various roles that require full-stack development skills, making them valuable assets in many technology-driven fields.
connect me on LinkedIn for more -https://www.linkedin.com/in/ridoy-hasan7 | ridoy_hasan |
1,897,326 | ⭐️ We all want a good DevEx. Here's how to do it right: | Imagine spending more time coding and less time starting, configuring, testing, debugging,... | 0 | 2024-06-22T20:35:00 | https://dev.to/buildwebcrumbs/we-all-want-a-good-devex-heres-how-to-do-it-right-11hj | webdev, javascript, beginners, programming | Imagine spending more time coding and less time starting, configuring, testing, debugging, deploying...
That's the dream, right?
Developer Experience (DevEx) is about making it a reality.
### Goals
- Maximize time spent on the fun part—coding!
- Minimize the dreaded manual setup and configuration
- Make end-to-end testing easy
### Impact
- Increase team velocity by ditching non-value-add activities
- Improve code quality with super-easy debugging and testing
- Onboard new devs quickly with automated essential tasks
> By the way, there's an entertaining book about the hurdles of onboarding. I can't remember if it's [The Phoenix Project](https://www.amazon.com/Phoenix-Project-DevOps-Helping-Business/dp/0988262592) or [The Unicorn Project](https://www.amazon.com/Unicorn-Project-Developers-Disruption-Thriving-ebook/dp/B07QT9QR41), but either way, both are worth reading! 📚
### Measures
- **Time to First E2E Result**: How fast can you set up and run the system from scratch?
- **Time to First Commit**: How quickly can you make and verify a change locally?
I heard a friend once literally cry because testing and debugging locally took forever with Docker. Maybe one of you would have a better suggestion for him. Time to first commit is an essential measure to keep up.
### Roles
- **Dev Lead**: Set the dev environment and expectations
- **DevEx Champion**: Seek iterative improvements in the dev environment
- **Team Members**: Hold each other accountable and spot deviations
- **New Team Members**: Identify undocumented processes during onboarding with fresh eyes
### Strategies
- Assign hotkeys for essential tasks (because who doesn't love shortcuts?)
- The F5 Contract: End-to-end solutions
- Make tasks cross-platform (unite dev tribes)
- Create an epic onboarding guide
- Standardize essential tasks across solution components (keep it consistent)
- Implement observability for smoother debugging and performance
### Number of Repositories:
According to the [Microsoft Engineering Playbook](https://microsoft.github.io/code-with-engineering-playbook/developer-experience/), fewer repos = fewer headaches.
But I don't know. It can also be that fewer repos = greater entanglement = more headaches.
What's your take on this?
### Minimize Remote Dependencies
Also according to [Microsoft](https://microsoft.github.io/code-with-engineering-playbook/developer-experience/), we better use emulators and dependency injection to mock remote dependencies (keep it local, keep it simple). We should abstract remote dependencies behind interfaces (interface is king).
Maybe... only maybe... what's missing is a reliable way of connecting to remote dependencies. 🧡 Check [Webcrumbs](https://github.com/webcrumbs-community/webcrumbs) for instance
### Observability
Enhance performance by quickly spotting and resolving issues (like having a crystal ball for your code)
## Why it matters to us?
At [Webcrumbs](https://github.com/webcrumbs-community/webcrumbs), we're developers building an open source for developers. We want to make developers' lives easier. So we're constantly thinking about Developer Experience.
You can give your perspective and ask us what you'd like to make your life easier and funnier. We're all ears:
 | opensourcee |
1,897,325 | Twilio challenge submission | *This is a submission for the twilio challenge [Twilio challenge ] source code:... | 0 | 2024-06-22T20:33:59 | https://dev.to/mr-simze/twilio-challenge-submission-2680 | devchallenge, twiliochallenge, ai, twilio | *This is a submission for the twilio challenge [Twilio challenge ]
source code: (https://github.com/Abidoyesimze/AI-driven-twilio-bot)
What I Built
I built a Personal Finance Tracker application that helps users track their income and expenses. This application allows users to record transactions, categorize them as either income or expenses, and view their financial summary through a dashboard and interactive charts. The app ensures data persistence and is responsive for usability on various devices.
Demo
Twilio and AI
In this project, Twilio's capabilities are leveraged for SMS notifications. Users can opt-in to receive SMS alerts for specific financial activities, such as when their expenses exceed a certain threshold or when they receive new income. This integration enhances user engagement and provides real-time financial updates directly to their mobile phones.
Additional Prize Categories
Twilio Times Two: This submission leverages both Twilio and AI to provide real-time SMS notifications based on user-defined financial thresholds, making it a contender for the Twilio Times Two category.
Impactful Innovators: By helping users manage their finances effectively and providing timely notifications, this app aims to positively impact financial health, making it a suitable candidate for the Impactful Innovators category.
Entertaining Endeavors: The interactive charts and visually appealing interface make managing finances more engaging and less of a chore, qualifying for the Entertaining Endeavors category.
Team Submissions
This project was developed by a single developer. | mr-simze |
1,897,324 | WIZARD WEB RECOVERY RESTORING LOST BITCOIN & CRYPTOCURRENCY | Losing a significant amount of money to scammers can be a bizarre experience that leaves you feeling... | 0 | 2024-06-22T20:31:59 | https://dev.to/bonnie_eugene_8b61620eb7e/wizard-web-recovery-restoring-lost-bitcoin-cryptocurrency-1n4e | Losing a significant amount of money to scammers can be a bizarre experience that leaves you feeling helpless and betrayed. This was the situation I found myself in after investing over a hundred thousand dollars in a crypto platform that turned out to be a scam. I was introduced to this platform by a friend of my cousin, and everything seemed legitimate until it was too late for me to realize that I had been duped. The days following the realization of my loss were some of the darkest I have ever experienced. I was consumed by feelings of depression and desperation as I tried everything in my power to retrieve my hard-earned money. I reached out to various authorities and sought advice from friends and family, but it seemed like there was no way to recover what I had lost. It was during this time that a friend mentioned a platform called Wizard Web Recovery that specialized in recovering funds lost to scams. At first, I was skeptical and hesitant to trust another company with my money, but I was running out of options and decided to give them a chance. Looking back, this decision turned out to be the best one I could have made. From the moment I contacted Wizard Web Recovery, I was impressed by their dedication to helping me recover my funds. Their team of experts guided me through the process step by step, explaining each stage clearly and answering all of my questions along the way. They kept me informed of their progress and worked tirelessly to ensure that my case was given the attention it deserved. I was amazed at how quickly Wizard Web Recovery was able to track down the scammers and retrieve my money. Within a relatively short period, I received the news that my funds had been successfully recovered, and I couldn't believe it. It felt like a weight had been lifted off my shoulders, and I was filled with gratitude for the team at Wizard Web Recovery who had made it possible. | bonnie_eugene_8b61620eb7e | |
1,897,323 | Build your Service Mesh: Admission Controller | Creating the Admission Controller Before kube-apiserver persists the object and later be... | 27,820 | 2024-06-22T20:26:49 | https://dev.to/ramonberrutti/build-your-service-mesh-part-2-9c4 | kubernetes, go, diy, tutorial | ## Creating the Admission Controller
Before kube-apiserver persists the object and later be scheduled to a node,
the Admission Controller can validate and mutate the object.
The Mutation Admission Controller is going to mutate the pods that have the the
annotation `diy-service-mesh: true`.
Let's dig into how the Admission Controller works.
### Admission Controller Flow
1. kube-controller or kubectl sends a request to the kube-apiserver to create a pod.
1. The kube-apiserver sends the request to the Admission Controller. In this case the proxy-injector.
1. The proxy-injector returns the mutated patch to the kube-apiserver.
1. Kube-apiserver persists the object in the etcd if the object is valid.
1. Kube-scheduler will schedule the pod to a node.
1. Kube-scheduler returns an available node to the kube-apiserver or an error if the pod can't be scheduled.
1. The kube-apiserver will store the object in the etcd with the selected node.
1. The kubelet in the selected node will create the pod in the container runtime.
### Admission Controller Code
Full code of the Admission Controller: [injector](https://github.com/ramonberrutti/diy-service-mesh/blob/main/cmd/injector/main.go)
The mutate function processes the AdmissionReview object and returns the AdmissionResponse object with the mutated patch.
```go
func mutate(ar *admissionv1.AdmissionReview) *admissionv1.AdmissionResponse {
req := ar.Request
// Ignore all requests other than pod creation.
if req.Operation != admissionv1.Create || req.Kind.Kind != "Pod" {
return &admissionv1.AdmissionResponse{
UID: req.UID,
Allowed: true,
}
}
var pod v1.Pod
// Unmarshal the raw object to the pod.
if err := json.Unmarshal(req.Object.Raw, &pod); err != nil {
return &admissionv1.AdmissionResponse{
UID: req.UID,
Result: &metav1.Status{
Message: err.Error(),
},
}
}
// Check if the pod contains the inject annotation.
if v, ok := pod.Annotations["diy-service-mesh/inject"]; !ok || strings.ToLower(v) != "true" {
return &admissionv1.AdmissionResponse{
UID: req.UID,
Allowed: true,
}
}
// Add the initContainer to the pod.
pod.Spec.InitContainers = append(pod.Spec.InitContainers, v1.Container{
Name: "proxy-init",
Image: os.Getenv("IMAGE_TO_DEPLOY_PROXY_INIT"),
ImagePullPolicy: v1.PullAlways,
SecurityContext: &v1.SecurityContext{
Capabilities: &v1.Capabilities{
Add: []v1.Capability{"NET_ADMIN", "NET_RAW"},
Drop: []v1.Capability{"ALL"},
},
},
})
// Add the sidecar container to the pod.
pod.Spec.Containers = append(pod.Spec.Containers, v1.Container{
Name: "proxy",
Image: os.Getenv("IMAGE_TO_DEPLOY_PROXY"),
ImagePullPolicy: v1.PullAlways,
SecurityContext: &v1.SecurityContext{
RunAsUser: func(i int64) *int64 { return &i }(1337),
RunAsNonRoot: func(b bool) *bool { return &b }(true),
},
})
patch := []map[string]any{
{
"op": "replace",
"path": "/spec/initContainers",
"value": pod.Spec.InitContainers,
},
{
"op": "replace",
"path": "/spec/containers",
"value": pod.Spec.Containers,
},
}
podBytes, err := json.Marshal(patch)
if err != nil {
return &admissionv1.AdmissionResponse{
UID: req.UID,
Result: &metav1.Status{
Message: err.Error(),
},
}
}
patchType := admissionv1.PatchTypeJSONPatch
return &admissionv1.AdmissionResponse{
UID: req.UID,
Allowed: true,
AuditAnnotations: map[string]string{
"proxy-injected": "true",
},
Patch: podBytes,
PatchType: &patchType,
}
}
```
`IMAGE_TO_DEPLOY_PROXY_INIT` and `IMAGE_TO_DEPLOY_PROXY` are environment variables that `tilt` will update with the last `proxy-init` and `proxy` image respectively.
For complex patch use thi library: https://github.com/evanphx/json-patch
## Deploying the Admission Controller
`MutatingWebhookConfiguration` tells the kube-apiserver to send the pod creation requests to the injector.
```yaml
apiVersion: admissionregistration.k8s.io/v1
kind: MutatingWebhookConfiguration
metadata:
name: service-mesh-injector-webhook
webhooks:
- name: service-mesh-injector.service-mesh.svc
clientConfig:
service:
name: service-mesh-injector
namespace: service-mesh
path: "/inject"
rules:
- operations: ["CREATE"]
apiGroups: [""]
apiVersions: ["v1"]
resources: ["pods"]
admissionReviewVersions: ["v1"]
sideEffects: None
timeoutSeconds: 5
```
Some important points:
- `caBundle` in the `clientConfig` is missing. This is a necessary field because the kube-apiserver only calls the webhook if the certificate is valid.
- Two jobs, `injector-admission-create` `injector-admission-patch` are going generate the certificates and patch the `MutatingWebhookConfiguration` with the `caBundle`.
- The `rules` options allow to filter the objects that are going to be sent to the injector.
The file [injector.yaml](https://github.com/ramonberrutti/diy-service-mesh/blob/main/k8s/injector.yaml) contains the nesesary resources
including the Service Account, Role, RoleBinding, ClusterRole, ClusterRoleBinding,
Service, Deployment and the Job to generate the certificates.
## Testing the Admission Controller
Let's modify the `http-client` and `http-server` deployments to add the annotation `diy-service-mesh/inject: "true"`.
```yaml
spec:
replicas: 1
selector:
matchLabels:
app: http-client
template:
metadata:
labels:
app: http-client
annotations:
diy-service-mesh/inject: "true"
spec:
```
*Important:* the annotation needs to be added to the pod template and not to the deployment. | ramonberrutti |
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1,897,310 | 카지노 사기 노출: 토토커뮤니티에 가입하세요 | 많은 카지노 플레이어들이 돈을 벌기 위해 속이는 사기를 경험했습니다. 속임수에 맞서 단결하기 위해 토토커뮤니티가 형성된 이유입니다. 회원으로서 플레이어는 자신의 이야기를 공유하여... | 0 | 2024-06-22T20:18:13 | https://dev.to/uj8__b9ebd8bf7676dae/kajino-sagi-nocul-totokeomyunitie-gaibhaseyo-3ied |
많은 카지노 플레이어들이 돈을 벌기 위해 속이는 사기를 경험했습니다. 속임수에 맞서 단결하기 위해 토토커뮤니티가 형성된 이유입니다. 회원으로서 플레이어는 자신의 이야기를 공유하여 다른 사람들이 대략적인 행동을 식별하고 온라인 도박을 모두에게 공평하게 만들 수 있도록 돕습니다.
토토커뮤니티는 온라인 포럼을 통해 도박꾼들을 하나로 모으는 방식으로 운영됩니다. 여기에서 사람들은 카지노가 시도한 교활한 속임수에 대해 글을 쓸 수 있습니다. 책을 읽는 다른 사람들은 자주 방문하는 사이트에서 유사한 사기를 인식할 수 있습니다. 증거를 수집함으로써 그룹은 모든 카지노를 정직하게 유지하여 사기에 대한 두려움 없이 즐거운 플레이를 유지할 수 있도록 돕습니다.
주요 시사점
토토커뮤니티는 공개 토론을 통해 온라인 카지노 업계에서 흔히 발생하는 사기 행위를 폭로하기 위해 노력하는 그룹입니다.
회원들은 기만적인 보너스, 조작된 게임, 상금을 지급하지 못하는 카지노에 대한 개인적인 경험을 공유합니다.
이러한 증거를 종합함으로써 커뮤니티는 문제가 있는 운영자에게 의심스러운 관행을 바꾸도록 압력을 가할 수 있습니다.
가입하면 개인이 사기 행위에 대한 집단 문서에 자신의 상황을 추가할 수 있습니다.
이 그룹은 사기를 식별하고 방지하는 방법에 대해 다른 사람들로부터 지침을 얻을 수 있는 포럼을 제공합니다.
유나이티드 회원은 소비자 보호 문제가 제기되면 카지노가 무시할 가능성이 적다는 강력한 목소리를 형성합니다.
전반적인 목표는 플레이어를 교육하고 온라인 도박 전반에 걸쳐 더 많은 진실성과 투명성을 배양하는 것입니다.
가입하면 사람들이 업계 전반에 걸쳐 플레이어 보호를 강화하는 중요한 작업에 기여할 수 있습니다.
카지노 사기 소개
토토커뮤니티는 많은 온라인 카지노 플레이어의 사기에 영향을 미치는 문제를 해결하기 위해 노력하고 있습니다. 온라인 도박의 인기가 높아짐에 따라 일부 카지노에서 플레이어를 속이기 위해 사용하는 오해의 소지가 있는 관행도 증가했습니다. 토토커뮤니티에 가입하는 것은 플레이어가 지식과 경험을 공유하여 사기에 맞서 싸울 수 있는 한 가지 방법입니다.
이 기사에서는 몇 가지 일반적인 카지노 사기, 토토커뮤니티가 이를 폭로하기 위해 어떻게 노력하고 있는지, 그리고 왜 이 그룹에 가입하면 플레이어를 보호하고 보다 정직한 온라인 도박을 장려하는 데 도움이 될 수 있는지 알아볼 것입니다. 결국, 귀하는 카지노 무결성을 위해 헌신하는 커뮤니티의 일원이 되는 것의 가치를 이해하게 될 것입니다.
보너스 사기는 플레이어를 오도합니다
가장 까다로운 유형의 사기 중 하나는 카지노 보너스를 중심으로 하며, 이는 새로운 플레이어를 유치하기 위해 공격적으로 마케팅됩니다. 그러나 보너스 조건의 작은 글씨가 숨겨진 제한 사항에 대해 항상 명확하지는 않습니다. 일부 카지노에서는 이를 이용하여 지불금을 거부합니다. 토토커뮤니티는 회원 신고를 통해 사기성 보너스 정책을 적발하기 위해 노력하고 있습니다. 예를 들어, 한 카지노에서는 100% 첫 입금 매치에서 출금 전에 보너스를 40번 베팅해야 한다고 주장했습니다.
그러나 그들은 최대 베팅 금액이 5달러에 불과하다는 점을 언급하지 못했습니다. 보너스를 클리어하려면 플레이어는 $8,000를 베팅해야 하므로 수익을 얻는 것은 거의 불가능합니다. 커뮤니티 포럼에서 이와 같은 경험을 공유하면 플레이어는 사기성 보너스 관행을 식별하고 문제가 있는 카지노를 피할 수 있습니다. 또한 카지노가 평판을 유지하기 위해 정책을 투명하게 만들도록 압력을 가하고 있습니다.
조작된 게임은 공정한 승리 기회를 제공하지 않습니다
또 다른 위협은 카지노가 자신에게 유리하게 게임을 조작하기 위해 가중치 확률이나 기타 조작을 사용하는 것입니다. 합법적인 온라인 슬롯과 테이블 게임은 공정한 것으로 인증되었지만 일부 불량 운영자는 여전히 플레이어를 속여 돈을 벌려고 합니다.
공개 토론을 통해 토토커뮤니티 협력은 의심스러운 사이트에서 게임을 테스트합니다. 예를 들어, 회원들은 특정 온라인 슬롯이 프로그래밍된 확률이 허용하는 것보다 훨씬 더 낮은 임금의 특정 기호를 선호하는 것 같다고 지적했습니다. 수천 번의 스핀을 기록 및 분석하고 결과를 공유한 후 게임이 RNG(난수 생성기)를 통해 조작되었다는 강력한 증거를 제공했습니다. 이와 같은 노출은 카지노가 선수를 키우거나 잃을 위험을 감수하도록 강요합니다.
토토커뮤니티는 공동 테스트와 같은 경계를 통해 플레이어 보호를 최우선으로 생각합니다. 이는 게임 부패를 잡기 위해 개인이 혼자 행동하는 것보다 그룹이 사이트를 더 효과적으로 모니터링할 수 있는 방법을 보여줍니다. 회원들은 온라인 도박에 대한 신뢰를 고취하는 공정한 조건을 조성하기 위해 노력합니다.
결제 문제로 당첨 거부
가장 당황스러운 사기 중 하나는 카지노가 돈을 딴 플레이어로부터 지불금을 보류할 구실을 찾는 것과 관련이 있습니다. 때때로 기술적 문제로 인해 문제가 발생할 수 있지만 일부 운영자는 정당한 지불을 거부하기 위해 의도적으로 장벽을 만듭니다.
토토커뮤니티는 의심스러운 지불 행위 사례를 문서화하기 위해 노력하고 있습니다. 예를 들어, 한 회원은 통신을 완전히 중단하기 전에 $2,000 인출에 대해 지속적으로 추가 문서를 요청한 카지노 경험을 공유했습니다. 다른 사람들은 동일한 카지노에서 발생한 돈이 사라진 비슷한 이야기를 보고했습니다.
토토커뮤니티는 문제가 있는 패턴을 강조하는 집단 사례를 구축하여 의심스러운 사이트에 압력을 가합니다. 이는 문제를 신속하고 공정하게 해결하거나 새로운 플레이어를 방해하여 평판을 위태롭게 만들도록 강요합니다. 이 그룹의 투명성은 플레이어가 미지급 상금 이력이 있는 신뢰할 수 없는 카지노를 식별하고 피하는 데 도움이 됩니다.
왜 토토커뮤니티에 가입해야 하나요?
온라인 카지노가 발전함에 따라 게임을 공정하고 재미있게 유지하기 위한 플레이어의 접근 방식도 발전해야 합니다. 개인의 경계는 열린 의사소통과 경험 공유를 통해 함께 할 수 있으며, 토토커뮤니티는 사기를 폭로할 수 있는 조직화된 방법을 제공합니다. 이 그룹은 힘을 합쳐 문제가 있는 운영자에게 가치 있는 압력을 가하기 위해 회원들의 목소리를 확대합니다. 이는 플레이어가 정보에 입각한 선택을 하도록 돕고 사기 행위로부터 서로를 보호합니다.
궁극적으로 토토커뮤니티는 옹호, 교육 및 투명성을 통해 온라인 도박의 정직성을 키우기 위해 노력하고 있습니다. 카지노 부패에 공동으로 맞서 싸우고 업계를 개선하고 싶다면 이러한 협력 노력에 귀하의 경험을 빌려주는 것을 고려해 보십시오. 커뮤니티 포럼에서 토론에 참여하고 페어플레이를 위해 다른 사람들과 협력하세요. 우리는 함께 의심스러운 행동을 억제하면서 온라인 카지노가 긍정적인 잠재력을 최대한 발휘할 수 있도록 도울 수 있습니다. 토토커뮤니티는 사기에 대한 보호를 강화하고 혼자 도박을 하지 말고 우리가 어떤 일을 하는지 직접 확인하고 싶은 모든 플레이어를 환영합니다.
자주 묻는 질문
토토커뮤니티란 무엇인가요?
온라인 도박 사기로부터 플레이어를 보호하는 그룹입니다.
플레이어에게 어떻게 도움이 되나요?
회원들은 문제가 있는 카지노를 식별하기 위한 트릭을 공개하고 팁을 공유합니다.
어떻게 가입할 수 있나요?
토론에 참여하려면 포럼에 가입하기만 하면 됩니다.
회원들은 어떤 이야기를 올리나요?
그들은 거부된 보너스, 조작된 게임, 이유 없이 자금이 보류된 것에 대해 씁니다.
혼자 연기하는 것보다 나은 이유는 무엇인가요?
그룹의 목소리는 부정직한 운영자에게 더 많은 영향력을 행사합니다.
카지노는 제기된 문제에 대응합니까?
그렇습니다. 지역 사회의 활동으로 인해 사기꾼들이 개혁을 시도하거나 평판이 훼손될 위험이 있습니다.
결론
토토커뮤니티에 가입하는 것은 모든 온라인 카지노 플레이어에게 도움이 됩니다. 회원들이 자신의 경험을 공유하면 모든 사람이 사기를 사용하는 수상한 운영자를 피하는 데 도움이 됩니다. 이 그룹은 카지노 사기를 폭로하기 위해 열심히 노력하고 있습니다. 토토커뮤니티에 가입하여 속임수 없이 도박을 즐길 수 있도록 하세요.
큰 승자가 큰 패자를 마주하든지, 속은 새로운 사람이든, 문제를 게시하고 속은 다른 사람들을 찾을 수 있는 곳이 존재합니다. 회원들은 함께 사기에 민감한 카지노가 직면하고 싶어하지 않는 강력한 목소리를 형성합니다. 부정직에 맞서 단결하여 커뮤니티는 불공정한 플레이가 업계 전반에서 더 이상 용납되지 않을 것임을 분명히 합니다.
가입함으로써 사람들의 돈을 속이려는 관행을 폭로하는 노력에 추가하게 됩니다. 토론에 참여하여 귀중한 세부 정보를 제공하거나 다른 사람의 의견을 활용하세요. 토토커뮤니티는 공개 토론과 온라인 집단 경계를 통해 수상한 행동을 줄임으로써 게임 경험을 향상시킵니다.
카지노 사기 노출: 토토커뮤니티에 가입하세요. 이 커뮤니티에 가입하여 함께 협력하여 카지노 사기를 찾아보세요.
| uj8__b9ebd8bf7676dae | |
1,897,307 | 8 Engaging MySQL Database Tutorials to Boost Your Skills 💻 | The article is about an engaging collection of 8 MySQL database tutorials from LabEx. It covers a wide range of topics, including accessing databases, querying data, managing user permissions, creating database views, and maintaining course information. The tutorials are designed to help readers, from beginners to experienced developers, enhance their SQL and database management skills through hands-on projects. The article provides a concise overview of each tutorial, along with direct links to the learning resources, making it an invaluable guide for anyone looking to dive into the world of MySQL databases. | 27,755 | 2024-06-22T20:10:53 | https://dev.to/labex/8-engaging-mysql-database-tutorials-to-boost-your-skills-5a1 | mysql, coding, programming, tutorial |
Dive into the world of MySQL databases with this comprehensive collection of 8 captivating tutorials from LabEx. Whether you're a beginner or an experienced developer, these hands-on projects will guide you through essential database management tasks, from querying data to creating views and managing user permissions. 🤓
## 1. Accessing MySQL Database and Querying GNP 🌍
In this project, you'll learn how to access a MySQL database, import data, and query the Gross National Product (GNP) for all countries. Explore the power of SQL queries and gain insights into global economic data. [Access the tutorial](https://labex.io/labs/301315)
## 2. Query City Names With Country 🌆
Discover the power of SQL joins as you execute an equal join query on the city, country, and countrylanguage tables in MySQL. Retrieve the city name, corresponding country name, and language, unlocking a wealth of geographic and linguistic information. [Dive into the tutorial](https://labex.io/labs/301382)
## 3. Database Management and SQL Self-Join 🗃️
Learn how to create a database, a table, and insert data into the table. Then, explore the power of self-join queries to find the province to which a city belongs. Enhance your database management skills and master advanced SQL techniques. [Explore the tutorial](https://labex.io/labs/301300)
## 4. Creating Database Views in MySQL 🔍
Streamline your data access with this tutorial on creating database views. Learn how to build a view based on the student table in the edusys database, focusing on the ID, name, and dept_name columns. Simplify your data exploration and analysis. [Access the tutorial](https://labex.io/labs/301416)
## 5. Manage MySQL User Permissions 🔒
Dive into the world of database security as you learn how to manage user permissions in a MySQL database. Create a new local user named 'Rong' and grant them access to the performance_schema database. Enhance your database administration skills. [Explore the tutorial](https://labex.io/labs/301430)
## 6. A Simple Course Database 📚
Develop your database design skills by creating a simple course database using MySQL. Set up the database, create tables, and import data from CSV files. Gain hands-on experience in building and populating relational databases. [Access the tutorial](https://labex.io/labs/301272)
## 7. Query Population of All Countries 🌎
Enhance your SQL querying abilities by accessing a MySQL database, importing data, and retrieving population data for all countries. Unlock insights into global demographics and strengthen your relational database skills. [Dive into the tutorial](https://labex.io/labs/301388)
## 8. Delete Expired Course Information 🗑️
Learn how to manage and maintain a database of course information. The main task is to delete expired course information from the database using SQL commands. Develop your database maintenance skills and keep your data up-to-date. [Explore the tutorial](https://labex.io/labs/301332)
Embark on your MySQL database learning journey with this diverse collection of tutorials. 🚀 Each project offers unique challenges and opportunities to expand your knowledge and skills. Happy coding! 💻
---
## Want to learn more?
- 🌳 Learn the latest [MySQL Skill Trees](https://labex.io/skilltrees/mysql)
- 📖 Read More [MySQL Tutorials](https://labex.io/tutorials/category/mysql)
- 🚀 Practice thousands of programming labs on [LabEx](https://labex.io)
Join our [Discord](https://discord.gg/J6k3u69nU6) or tweet us [@WeAreLabEx](https://twitter.com/WeAreLabEx) ! 😄 | labby |
1,897,306 | 10 Extension Methods examples in Dart: A Comprehensive Guide with Code Examples | Dart extension method are used from string manipulation to mathematical operations on existing... | 0 | 2024-06-22T20:10:34 | https://dev.to/francescoagati/10-extension-methods-examples-in-dart-a-comprehensive-guide-with-code-examples-2cb9 | Dart extension method are used from string manipulation to mathematical operations on existing classes.
10 Unique Extension Method Examples:
### 1 - String Extension - `capitalizeFirstLetter()`: Capitalizes the first letter of a given string.
```dart
extension CapString on String {
String capitalizeFirstLetter() {
return this[0].toUpperCase() + substring(1);
}
}
```
Example usage:
```dart
void main() {
String name = "john doe";
print(name.capitalizeFirstLetter()); // Output: John Doe
}
```
### 2 - List Extension - `findMaxElement()`: Finds the maximum element in a list of integers.
```dart
extension MaxList on List<int> {
int findMaxElement() {
return reduce(max);
}
}
```
Example usage:
```dart
void main() {
List<int> numbers = [3, 9, 1, 7, 5];
print(numbers.findMaxElement()); // Output: 9
}
```
### 3 - Int Extension - `isEven()`: Checks if an integer is even.
```dart
extension EvenInt on int {
bool isEven() {
return this % 2 == 0;
}
}
```
Example usage:
```dart
void main() {
int number = 15;
print(number.isEven()); // Output: false
}
```
### 4 - List Extension - `reverseList()`: Reverses the elements of a list in-place.
```dart
extension RevList<T> on List<T> {
void reverseList() {
this.asMap().forEach((i, element) => this[i] = this[length - i - 1]);
}
}
```
Example usage:
```dart
void main() {
List<String> fruits = ["apple", "banana", "cherry"];
fruits.reverseList();
print(fruits); // Output: [cherry, banana, apple]
}
```
### 5 - String Extension - `isPalindrome()`: Checks if a string is a palindrome (reads the same backward as forward).
```dart
extension PalinString on String {
bool isPalindrome() {
return this == reverse;
}
}
```
Example usage:
```dart
void main() {
String word = "radar";
print(word.isPalindrome()); // Output: true
}
```
### 6 - List Extension - `average()`: Calculates the average of a list of numbers.
```dart
extension AvgList on List<num> {
double average() {
return reduce((sum, element) => sum + element) / length;
}
}
```
Example usage:
```dart
void main() {
List<double> scores = [90.5, 87.3, 92.1, 88.9];
print(scores.average()); // Output: 89.175
}
```
### 7 - Int Extension - `factorial()`: Calculates the factorial of an integer.
```dart
extension FactInt on int {
int factorial() {
return (this < 2) ? 1 : this * (this - 1).factorial();
}
}
```
Example usage:
```dart
void main() {
int number = 5;
print(number.factorial()); // Output: 120
}
```
### 8 - List Extension - `removeDuplicates()`: Removes duplicate elements from a list.
```dart
extension UniqList<T> on List<T> {
void removeDuplicates() {
this.replaceRange(0, length, toSet().toList());
}
}
```
Example usage:
```dart
void main() {
List<int> numbers = [1, 2, 3, 4, 4, 5, 6, 6, 7];
numbers.removeDuplicates();
print(numbers); // Output: [1, 2, 3, 4, 5, 6, 7]
}
```
### 9 - String Extension - `countVowels()`: Counts the number of vowels in a string.
```dart
extension VowelString on String {
int countVowels() {
return replaceAll(RegExp(r'[^aeiou]'), '').length;
}
}
```
Example usage:
```dart
void main() {
String sentence = "The quick brown fox jumps over the lazy dog";
print(sentence.countVowels()); // Output: 5
}
```
### 10 - List Extension - `isSorted()`: Checks if a list of integers is sorted in ascending order.
```dart
extension SortList on List<int> {
bool isSorted() {
return this == toList()..sort();
}
}
```
Example usage:
```dart
void main() {
List<int> numbers = [1, 2, 3, 4, 5];
print(numbers.isSorted()); // Output: true
}
```
Extension methods in Dart provide a powerful way to add functionality to existing classes without modifying their source code. By using these extensions, you can write cleaner and more maintainable code that is easier to understand and use. In this article, we've presented ten unique examples of extension methods for various data types and demonstrated how they can be used effectively. | francescoagati | |
1,897,070 | Turso libSQL Installer | Hello Punk! Yes I am, in this journal I want to share with you how to install libSQL in your PHP... | 0 | 2024-06-22T20:10:03 | https://dev.to/darkterminal/turso-libsql-installer-29mj | webdev, database, php, laravel | Hello Punk! Yes I am, in this journal I want to share with you how to install [libSQL](turso.tech/libsql) in your PHP Environment without worry to configure `php.ini` file in your current PHP Version.
Install the libSQL extension for PHP it's like install a composer package:
```bash
composer require vendor/package
```
to install libSQL extension for PHP
```bash
turso-php-installer install
```
---
Anyway... I want you to know how the punk'in single file installer script work and setup it for you.
## `help` command
You already see in the image above. That's the `help` command does.
## `install` command
The `install` command will do some necessary checks before installing the libSQL Extension for PHP, what a questions will ask for? (checking in the background)
**Are You Using Windows?**
Even though [Turso Client PHP](https://github.com/tursodatabase/turso-client-php) has an extension built for Windows MSVC 2022. However, the installation process using this installer script will not work for Windows. WSL will work or you can use [Turso Docker PHP](https://github.com/darkterminal/turso-docker-php)!
If you're using Windows then you will get this message:
```bash
> turso-php-installer install # In Windows
Sorry, Turso PHP Installer is only support for Linux and MacOS.
You are using Windows, you can try our alternative using Dev Containers
visit: https://github.com/darkterminal/turso-docker-php
Thank you!
```
**Are You Using Laravel Herd?**
Dang yeah... the installer is not support yet for Laravel Herd. But I will support soon, and you can follow up this discussion on [Herd Community GitHub Disccussion](https://github.com/beyondcode/herd-community/discussions/804).
```bash
$ turso-php-installer install
You are using Laravel Herd
Sorry, Laravel Herd is not supported yet.
You can try our alternative using Dev Containers
visit: https://github.com/darkterminal/turso-docker-php
Thank you!
```
**Is Already Installed**
Sometimes I forgot when it's already installed.
```bash
$ turso-php-installer install
Turso Client PHP is already installed and configured!
```
**Which PHP Version?**
Turso Client PHP / libSQL Extension for PHP need minimal PHP 8.0 and later. You see it at [Turso Client PHP - Release page](https://github.com/tursodatabase/turso-client-php/releases)
If you have PHP below the minimum requirement, then it will failed
```bash
$ turso-php-installer install
Oops! Your PHP version environment does not meet the requirements.
Need a minimal PHP 8.0 installed on your environment.
```
**Check `php.ini`**
The installer script need to lookup
```bash
$ turso-php-installer install
You don't have PHP install globaly in your environment
Turso Client PHP lookup php.ini file and it's not found
```
**Check The Functions Requiered**
The installer script also need a `shell_exec` and `curl` function
```bash
$ turso-php-installer install
It looks like the 'shell_exec' and 'curl_version' functions are disabled in your PHP environment. These functions are essential for this script to work properly.
To enable them, follow these steps:
1. Open your 'php.ini' file. You can find the location of your 'php.ini' file by running the command 'php --ini' in your terminal or command prompt.
2. Search for 'disable_functions' directive. It might look something like this:
disable_functions = shell_exec, curl_version
3. Remove 'shell_exec' and 'curl_version' from this list. It should look like:
disable_functions =
4. Save the 'php.ini' file.
5. Restart your web server for the changes to take effect. If you are using Apache, you can restart it with:
sudo service apache2 restart
or for Nginx:
sudo service nginx restart
If you are using a web hosting service, you might need to contact your hosting provider to enable these functions for you.
For more information on 'shell_exec', visit: https://www.php.net/manual/en/function.shell-exec.php
For more information on 'curl_version', visit: https://www.php.net/manual/en/function.curl-version.php
Thank you!
```
**Asking Permission**
The installer need to run with **sudo** role, because the installer will need to write `php.ini` file in your environment.
```bash
$ turso-php-installer install
Turso need to install the client extension in your PHP environment.
This script will ask your sudo password to modify your php.ini file:
Are you ok? [y/N]:
```
**Download and Extract**
After all requirements is meet, then installer will download and extract the libSQL Extension for PHP based on Current PHP version that used in your environment and store it at `$HOME/.turso-client-php`
---
The extension is required before you used [Turso Driver Laravel](https://github.com/tursodatabase/turso-driver-laravel) and [Turso Doctrine DBAL](https://github.com/tursodatabase/turso-doctrine-dbal) | darkterminal |
1,897,304 | Introduction to Pandas | Introduction If you're reading this article, you probably want to get an understanding of... | 0 | 2024-06-22T19:54:45 | https://dev.to/ugonma/introduction-to-pandas-11on | python, datascience, machinelearning, webdev | ## Introduction
If you're reading this article, you probably want to get an understanding of Pandas, so let's get to it.
Pandas - short for “Panel Data” - is a popular open-source programming language widely used for performing data manipulation and analysis. It has in-built functions to efficiently clean, transform, manipulate, visualize, and analyze data.
The Pandas library is an essential tool for Data analysts, Scientists, and Engineers working with structured data in Python.
This article will teach you basic functions you need to know when using Pandas library–its specific uses, and how to install Pandas.
## Getting Started with Pandas
Let’s learn how to install Python Pandas Library.
### How to install Pandas:
When working with Pandas Library, the first step is to ensure that it is installed in the system using the **pip command.**
```python
pip install pandas
```
Requirement already satisfied: pandas in c:\users\userpc\anaconda3\lib\site-packages (2.1.4)Note: you may need to restart the kernel to use updated packages.
Requirement already satisfied: numpy<2,>=1.23.2 in c:\users\userpc\anaconda3\lib\site-packages (from pandas) (1.24.3)
Requirement already satisfied: python-dateutil>=2.8.2 in c:\users\userpc\anaconda3\lib\site-packages (from pandas) (2.8.2)
Requirement already satisfied: pytz>=2020.1 in c:\users\userpc\anaconda3\lib\site-packages (from pandas) (2022.7)
Requirement already satisfied: tzdata>=2022.1 in c:\users\userpc\anaconda3\lib\site-packages (from pandas) (2023.4)
Requirement already satisfied: six>=1.5 in c:\users\userpc\anaconda3\lib\site-packages (from python-dateutil>=2.8.2->pandas) (1.16.0)
## Importing Pandas
To begin working with Pandas, import pandas package as follows:
```python
import pandas as pd
```
We are importing pandas from [anaconda](https://learning.anaconda.cloud/get-started-with-anaconda).
The most common and preferred short form for pandas is 'pd'. This shorter name is used because it makes the code shorter and easier to write whenever you need to use a pandas function.
## Components of pandas
Pandas provides two data structures for manipulating data. They include:
1. Series
2. DataFrame
A Series is essentially a column while a DataFrame is like a multi-dimensional structure or table formed by combining multiple Series together.
## Creating Series:
A pandas series is just like a column from an Excel Spreadsheet.
Example:
```python
#create a pandas Series
numbers = pd.Series([1, 2, 3, 4, 5])
# Displaying the Series
numbers
```
**Output:**
0 1
1 2
2 3
3 4
4 5
dtype: int64
Note: The codes embedded inside the hashtag symbol(#) is called **comments**. Comments is used in python to explain what a code is about so that incase another programmer gets to go through your written code, the person can understand what the code is about.
Another example includes:
```python
# Creating a Pandas Series of colors
colors_series = pd.Series(['red', 'blue', 'green'])
# Displaying the Series
colors_series
```
**Output:**
0 red
1 blue
2 green
dtype: object
For more reference on how create Pandas Series, refer to this article on [Creating Pandas Series](https://www.geeksforgeeks.org/python-pandas-series/).
## Creating DataFrame:
A DataFrame is a two-dimensional data structure similar to a table in a spreadsheet. It has rows and columns, where each row represents a record or observation, and each column represents a variable or an attribute.
A DataFrame lets you easily organize, manipulate, and analyze a dataset.
One simple way of creating DataFrames is by using a dictionary.
Here's how:
```python
# Creating a DataFrame with fruits and car types
data = {'Fruits': ['Apple', 'Banana', 'Orange'],'Car Types': ['SUV', 'Sedan', 'Truck']}
df = pd.DataFrame(data)
# Displaying the DataFrame
df
```
**Output:**
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>Fruits</th>
<th>Car Types</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>Apple</td>
<td>SUV</td>
</tr>
<tr>
<th>1</th>
<td>Banana</td>
<td>Sedan</td>
</tr>
<tr>
<th>2</th>
<td>Orange</td>
<td>Truck</td>
</tr>
</tbody>
</table>
</div>
## Importing Datasets
There are various formats in which data can be imported into the working environment(in this case, the working environment is Jupyter notebook). These formats can be: CSV, excel, HTML, JSON, SQL, and many more.
Comma-Seperated Values(CSV) is the most common format. It is imported into the working environment by using the pd.read_csv() function.
Now let's import our real dataset from here at [Kaggle](https://www.kaggle.com/datasets/shree1992/housedata?select=data.csv)
```python
df = pd.read_csv("C:/Users/USERPC/Downloads/house_price.csv")
df
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>2014-05-02 00:00:00</td>
<td>3.130000e+05</td>
<td>3.0</td>
<td>1.50</td>
<td>1340</td>
<td>7912</td>
<td>1.5</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1340</td>
<td>0</td>
<td>1955</td>
<td>2005</td>
<td>18810 Densmore Ave N</td>
<td>Shoreline</td>
<td>WA 98133</td>
<td>USA</td>
</tr>
<tr>
<th>1</th>
<td>2014-05-02 00:00:00</td>
<td>2.384000e+06</td>
<td>5.0</td>
<td>2.50</td>
<td>3650</td>
<td>9050</td>
<td>2.0</td>
<td>0</td>
<td>4</td>
<td>5</td>
<td>3370</td>
<td>280</td>
<td>1921</td>
<td>0</td>
<td>709 W Blaine St</td>
<td>Seattle</td>
<td>WA 98119</td>
<td>USA</td>
</tr>
<tr>
<th>2</th>
<td>2014-05-02 00:00:00</td>
<td>3.420000e+05</td>
<td>3.0</td>
<td>2.00</td>
<td>1930</td>
<td>11947</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1930</td>
<td>0</td>
<td>1966</td>
<td>0</td>
<td>26206-26214 143rd Ave SE</td>
<td>Kent</td>
<td>WA 98042</td>
<td>USA</td>
</tr>
<tr>
<th>3</th>
<td>2014-05-02 00:00:00</td>
<td>4.200000e+05</td>
<td>3.0</td>
<td>2.25</td>
<td>2000</td>
<td>8030</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1000</td>
<td>1000</td>
<td>1963</td>
<td>0</td>
<td>857 170th Pl NE</td>
<td>Bellevue</td>
<td>WA 98008</td>
<td>USA</td>
</tr>
<tr>
<th>4</th>
<td>2014-05-02 00:00:00</td>
<td>5.500000e+05</td>
<td>4.0</td>
<td>2.50</td>
<td>1940</td>
<td>10500</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1140</td>
<td>800</td>
<td>1976</td>
<td>1992</td>
<td>9105 170th Ave NE</td>
<td>Redmond</td>
<td>WA 98052</td>
<td>USA</td>
</tr>
<tr>
<th>...</th>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
</tr>
<tr>
<th>4595</th>
<td>2014-07-09 00:00:00</td>
<td>3.081667e+05</td>
<td>3.0</td>
<td>1.75</td>
<td>1510</td>
<td>6360</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1510</td>
<td>0</td>
<td>1954</td>
<td>1979</td>
<td>501 N 143rd St</td>
<td>Seattle</td>
<td>WA 98133</td>
<td>USA</td>
</tr>
<tr>
<th>4596</th>
<td>2014-07-09 00:00:00</td>
<td>5.343333e+05</td>
<td>3.0</td>
<td>2.50</td>
<td>1460</td>
<td>7573</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1460</td>
<td>0</td>
<td>1983</td>
<td>2009</td>
<td>14855 SE 10th Pl</td>
<td>Bellevue</td>
<td>WA 98007</td>
<td>USA</td>
</tr>
<tr>
<th>4597</th>
<td>2014-07-09 00:00:00</td>
<td>4.169042e+05</td>
<td>3.0</td>
<td>2.50</td>
<td>3010</td>
<td>7014</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>3010</td>
<td>0</td>
<td>2009</td>
<td>0</td>
<td>759 Ilwaco Pl NE</td>
<td>Renton</td>
<td>WA 98059</td>
<td>USA</td>
</tr>
<tr>
<th>4598</th>
<td>2014-07-10 00:00:00</td>
<td>2.034000e+05</td>
<td>4.0</td>
<td>2.00</td>
<td>2090</td>
<td>6630</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1070</td>
<td>1020</td>
<td>1974</td>
<td>0</td>
<td>5148 S Creston St</td>
<td>Seattle</td>
<td>WA 98178</td>
<td>USA</td>
</tr>
<tr>
<th>4599</th>
<td>2014-07-10 00:00:00</td>
<td>2.206000e+05</td>
<td>3.0</td>
<td>2.50</td>
<td>1490</td>
<td>8102</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1490</td>
<td>0</td>
<td>1990</td>
<td>0</td>
<td>18717 SE 258th St</td>
<td>Covington</td>
<td>WA 98042</td>
<td>USA</td>
</tr>
</tbody>
</table>
<p>4600 rows × 18 columns</p>
</div>
## Let's explore some pandas functions:
## .head()
A dataset consists of several rows and columns, which is hard to see all at once. So in this case, using the .head() function will return the first 5 rows of the dataset by default.
```python
df.head()
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>2014-05-02 00:00:00</td>
<td>313000.0</td>
<td>3.0</td>
<td>1.50</td>
<td>1340</td>
<td>7912</td>
<td>1.5</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1340</td>
<td>0</td>
<td>1955</td>
<td>2005</td>
<td>18810 Densmore Ave N</td>
<td>Shoreline</td>
<td>WA 98133</td>
<td>USA</td>
</tr>
<tr>
<th>1</th>
<td>2014-05-02 00:00:00</td>
<td>2384000.0</td>
<td>5.0</td>
<td>2.50</td>
<td>3650</td>
<td>9050</td>
<td>2.0</td>
<td>0</td>
<td>4</td>
<td>5</td>
<td>3370</td>
<td>280</td>
<td>1921</td>
<td>0</td>
<td>709 W Blaine St</td>
<td>Seattle</td>
<td>WA 98119</td>
<td>USA</td>
</tr>
<tr>
<th>2</th>
<td>2014-05-02 00:00:00</td>
<td>342000.0</td>
<td>3.0</td>
<td>2.00</td>
<td>1930</td>
<td>11947</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1930</td>
<td>0</td>
<td>1966</td>
<td>0</td>
<td>26206-26214 143rd Ave SE</td>
<td>Kent</td>
<td>WA 98042</td>
<td>USA</td>
</tr>
<tr>
<th>3</th>
<td>2014-05-02 00:00:00</td>
<td>420000.0</td>
<td>3.0</td>
<td>2.25</td>
<td>2000</td>
<td>8030</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1000</td>
<td>1000</td>
<td>1963</td>
<td>0</td>
<td>857 170th Pl NE</td>
<td>Bellevue</td>
<td>WA 98008</td>
<td>USA</td>
</tr>
<tr>
<th>4</th>
<td>2014-05-02 00:00:00</td>
<td>550000.0</td>
<td>4.0</td>
<td>2.50</td>
<td>1940</td>
<td>10500</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1140</td>
<td>800</td>
<td>1976</td>
<td>1992</td>
<td>9105 170th Ave NE</td>
<td>Redmond</td>
<td>WA 98052</td>
<td>USA</td>
</tr>
</tbody>
</table>
</div>
In case you want to see the first 7 or 10 rows of the dataset, you pass in the number of rows you want to see into the bracket like this:
```python
# to return the first 7 rows of the dataset
df.head(7)
# to return the first 10 rows of the dataset
# df.head(10)
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>2014-05-02 00:00:00</td>
<td>313000.0</td>
<td>3.0</td>
<td>1.50</td>
<td>1340</td>
<td>7912</td>
<td>1.5</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1340</td>
<td>0</td>
<td>1955</td>
<td>2005</td>
<td>18810 Densmore Ave N</td>
<td>Shoreline</td>
<td>WA 98133</td>
<td>USA</td>
</tr>
<tr>
<th>1</th>
<td>2014-05-02 00:00:00</td>
<td>2384000.0</td>
<td>5.0</td>
<td>2.50</td>
<td>3650</td>
<td>9050</td>
<td>2.0</td>
<td>0</td>
<td>4</td>
<td>5</td>
<td>3370</td>
<td>280</td>
<td>1921</td>
<td>0</td>
<td>709 W Blaine St</td>
<td>Seattle</td>
<td>WA 98119</td>
<td>USA</td>
</tr>
<tr>
<th>2</th>
<td>2014-05-02 00:00:00</td>
<td>342000.0</td>
<td>3.0</td>
<td>2.00</td>
<td>1930</td>
<td>11947</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1930</td>
<td>0</td>
<td>1966</td>
<td>0</td>
<td>26206-26214 143rd Ave SE</td>
<td>Kent</td>
<td>WA 98042</td>
<td>USA</td>
</tr>
<tr>
<th>3</th>
<td>2014-05-02 00:00:00</td>
<td>420000.0</td>
<td>3.0</td>
<td>2.25</td>
<td>2000</td>
<td>8030</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1000</td>
<td>1000</td>
<td>1963</td>
<td>0</td>
<td>857 170th Pl NE</td>
<td>Bellevue</td>
<td>WA 98008</td>
<td>USA</td>
</tr>
<tr>
<th>4</th>
<td>2014-05-02 00:00:00</td>
<td>550000.0</td>
<td>4.0</td>
<td>2.50</td>
<td>1940</td>
<td>10500</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1140</td>
<td>800</td>
<td>1976</td>
<td>1992</td>
<td>9105 170th Ave NE</td>
<td>Redmond</td>
<td>WA 98052</td>
<td>USA</td>
</tr>
<tr>
<th>5</th>
<td>2014-05-02 00:00:00</td>
<td>490000.0</td>
<td>2.0</td>
<td>1.00</td>
<td>880</td>
<td>6380</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>880</td>
<td>0</td>
<td>1938</td>
<td>1994</td>
<td>522 NE 88th St</td>
<td>Seattle</td>
<td>WA 98115</td>
<td>USA</td>
</tr>
<tr>
<th>6</th>
<td>2014-05-02 00:00:00</td>
<td>335000.0</td>
<td>2.0</td>
<td>2.00</td>
<td>1350</td>
<td>2560</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1350</td>
<td>0</td>
<td>1976</td>
<td>0</td>
<td>2616 174th Ave NE</td>
<td>Redmond</td>
<td>WA 98052</td>
<td>USA</td>
</tr>
</tbody>
</table>
</div>
## .tail()
The .tail() function returns the last 5 rows of the dataset by default. You can also pass in the specific number of rows that you want to the function to return as i earlier stated. In this case, you say .tail(8) or .tail(3). Calling these functions will return the last 8 rows of the dataset and the last 3 rows of the dataset. Let's run these codes, shall we?
```python
# to return the last 5 rows of the dataset(by default)
df.tail()
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
</tr>
</thead>
<tbody>
<tr>
<th>4595</th>
<td>2014-07-09 00:00:00</td>
<td>308166.666667</td>
<td>3.0</td>
<td>1.75</td>
<td>1510</td>
<td>6360</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1510</td>
<td>0</td>
<td>1954</td>
<td>1979</td>
<td>501 N 143rd St</td>
<td>Seattle</td>
<td>WA 98133</td>
<td>USA</td>
</tr>
<tr>
<th>4596</th>
<td>2014-07-09 00:00:00</td>
<td>534333.333333</td>
<td>3.0</td>
<td>2.50</td>
<td>1460</td>
<td>7573</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1460</td>
<td>0</td>
<td>1983</td>
<td>2009</td>
<td>14855 SE 10th Pl</td>
<td>Bellevue</td>
<td>WA 98007</td>
<td>USA</td>
</tr>
<tr>
<th>4597</th>
<td>2014-07-09 00:00:00</td>
<td>416904.166667</td>
<td>3.0</td>
<td>2.50</td>
<td>3010</td>
<td>7014</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>3010</td>
<td>0</td>
<td>2009</td>
<td>0</td>
<td>759 Ilwaco Pl NE</td>
<td>Renton</td>
<td>WA 98059</td>
<td>USA</td>
</tr>
<tr>
<th>4598</th>
<td>2014-07-10 00:00:00</td>
<td>203400.000000</td>
<td>4.0</td>
<td>2.00</td>
<td>2090</td>
<td>6630</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1070</td>
<td>1020</td>
<td>1974</td>
<td>0</td>
<td>5148 S Creston St</td>
<td>Seattle</td>
<td>WA 98178</td>
<td>USA</td>
</tr>
<tr>
<th>4599</th>
<td>2014-07-10 00:00:00</td>
<td>220600.000000</td>
<td>3.0</td>
<td>2.50</td>
<td>1490</td>
<td>8102</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1490</td>
<td>0</td>
<td>1990</td>
<td>0</td>
<td>18717 SE 258th St</td>
<td>Covington</td>
<td>WA 98042</td>
<td>USA</td>
</tr>
</tbody>
</table>
</div>
```python
# to return the last 8 rows of the dataset
df.tail(8)
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
</tr>
</thead>
<tbody>
<tr>
<th>4592</th>
<td>2014-07-08 00:00:00</td>
<td>252980.000000</td>
<td>4.0</td>
<td>2.50</td>
<td>2530</td>
<td>8169</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>2530</td>
<td>0</td>
<td>1993</td>
<td>0</td>
<td>37654 18th Pl S</td>
<td>Federal Way</td>
<td>WA 98003</td>
<td>USA</td>
</tr>
<tr>
<th>4593</th>
<td>2014-07-08 00:00:00</td>
<td>289373.307692</td>
<td>3.0</td>
<td>2.50</td>
<td>2538</td>
<td>4600</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>2538</td>
<td>0</td>
<td>2013</td>
<td>1923</td>
<td>5703 Charlotte Ave SE</td>
<td>Auburn</td>
<td>WA 98092</td>
<td>USA</td>
</tr>
<tr>
<th>4594</th>
<td>2014-07-09 00:00:00</td>
<td>210614.285714</td>
<td>3.0</td>
<td>2.50</td>
<td>1610</td>
<td>7223</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1610</td>
<td>0</td>
<td>1994</td>
<td>0</td>
<td>26306 127th Ave SE</td>
<td>Kent</td>
<td>WA 98030</td>
<td>USA</td>
</tr>
<tr>
<th>4595</th>
<td>2014-07-09 00:00:00</td>
<td>308166.666667</td>
<td>3.0</td>
<td>1.75</td>
<td>1510</td>
<td>6360</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1510</td>
<td>0</td>
<td>1954</td>
<td>1979</td>
<td>501 N 143rd St</td>
<td>Seattle</td>
<td>WA 98133</td>
<td>USA</td>
</tr>
<tr>
<th>4596</th>
<td>2014-07-09 00:00:00</td>
<td>534333.333333</td>
<td>3.0</td>
<td>2.50</td>
<td>1460</td>
<td>7573</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1460</td>
<td>0</td>
<td>1983</td>
<td>2009</td>
<td>14855 SE 10th Pl</td>
<td>Bellevue</td>
<td>WA 98007</td>
<td>USA</td>
</tr>
<tr>
<th>4597</th>
<td>2014-07-09 00:00:00</td>
<td>416904.166667</td>
<td>3.0</td>
<td>2.50</td>
<td>3010</td>
<td>7014</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>3010</td>
<td>0</td>
<td>2009</td>
<td>0</td>
<td>759 Ilwaco Pl NE</td>
<td>Renton</td>
<td>WA 98059</td>
<td>USA</td>
</tr>
<tr>
<th>4598</th>
<td>2014-07-10 00:00:00</td>
<td>203400.000000</td>
<td>4.0</td>
<td>2.00</td>
<td>2090</td>
<td>6630</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1070</td>
<td>1020</td>
<td>1974</td>
<td>0</td>
<td>5148 S Creston St</td>
<td>Seattle</td>
<td>WA 98178</td>
<td>USA</td>
</tr>
<tr>
<th>4599</th>
<td>2014-07-10 00:00:00</td>
<td>220600.000000</td>
<td>3.0</td>
<td>2.50</td>
<td>1490</td>
<td>8102</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1490</td>
<td>0</td>
<td>1990</td>
<td>0</td>
<td>18717 SE 258th St</td>
<td>Covington</td>
<td>WA 98042</td>
<td>USA</td>
</tr>
</tbody>
</table>
</div>
```python
# to return the last 3 rows of the dataset
df.tail(3)
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
</tr>
</thead>
<tbody>
<tr>
<th>4597</th>
<td>2014-07-09 00:00:00</td>
<td>416904.166667</td>
<td>3.0</td>
<td>2.5</td>
<td>3010</td>
<td>7014</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>3010</td>
<td>0</td>
<td>2009</td>
<td>0</td>
<td>759 Ilwaco Pl NE</td>
<td>Renton</td>
<td>WA 98059</td>
<td>USA</td>
</tr>
<tr>
<th>4598</th>
<td>2014-07-10 00:00:00</td>
<td>203400.000000</td>
<td>4.0</td>
<td>2.0</td>
<td>2090</td>
<td>6630</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1070</td>
<td>1020</td>
<td>1974</td>
<td>0</td>
<td>5148 S Creston St</td>
<td>Seattle</td>
<td>WA 98178</td>
<td>USA</td>
</tr>
<tr>
<th>4599</th>
<td>2014-07-10 00:00:00</td>
<td>220600.000000</td>
<td>3.0</td>
<td>2.5</td>
<td>1490</td>
<td>8102</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1490</td>
<td>0</td>
<td>1990</td>
<td>0</td>
<td>18717 SE 258th St</td>
<td>Covington</td>
<td>WA 98042</td>
<td>USA</td>
</tr>
</tbody>
</table>
</div>
## .shape
We use the .shape attribute to check how large the dataset is. This function will return the number of rows and column in the dataset.
```python
df.shape
```
**Output:**
(4600, 18)
Here we can see that the dataset has **4600 rows and 18 columns**.
**Note:** The index of the dataset always starts with 0 by default and not 1. If the index starts from 1, the index number of the last row will be 4600. So `since` the `index` of the dataset starts from 0, the index of the last row will be 4599. You can go through the .tail() to check it.
## .info()
The .info() function displays basic information about the dataset including the datatype, columns, non-null values, number of rows and columns and the memory usage.
```python
df.info()
```
**Output:**
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 4600 entries, 0 to 4599
Data columns (total 18 columns):
# Column Non-Null Count Dtype
--- ------ -------------- -----
0 date 4600 non-null object
1 price 4600 non-null float64
2 bedrooms 4600 non-null float64
3 bathrooms 4600 non-null float64
4 sqft_living 4600 non-null int64
5 sqft_lot 4600 non-null int64
6 floors 4600 non-null float64
7 waterfront 4600 non-null int64
8 view 4600 non-null int64
9 condition 4600 non-null int64
10 sqft_above 4600 non-null int64
11 sqft_basement 4600 non-null int64
12 yr_built 4600 non-null int64
13 yr_renovated 4600 non-null int64
14 street 4600 non-null object
15 city 4600 non-null object
16 statezip 4600 non-null object
17 country 4600 non-null object
dtypes: float64(4), int64(9), object(5)
memory usage: 647.0+ KB
## .describe()
The .describe() function returns the descriptive statistics of the dataframe.
```python
df.describe()
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
</tr>
</thead>
<tbody>
<tr>
<th>count</th>
<td>4.600000e+03</td>
<td>4600.000000</td>
<td>4600.000000</td>
<td>4600.000000</td>
<td>4.600000e+03</td>
<td>4600.000000</td>
<td>4600.000000</td>
<td>4600.000000</td>
<td>4600.000000</td>
<td>4600.000000</td>
<td>4600.000000</td>
<td>4600.000000</td>
<td>4600.000000</td>
</tr>
<tr>
<th>mean</th>
<td>5.519630e+05</td>
<td>3.400870</td>
<td>2.160815</td>
<td>2139.346957</td>
<td>1.485252e+04</td>
<td>1.512065</td>
<td>0.007174</td>
<td>0.240652</td>
<td>3.451739</td>
<td>1827.265435</td>
<td>312.081522</td>
<td>1970.786304</td>
<td>808.608261</td>
</tr>
<tr>
<th>std</th>
<td>5.638347e+05</td>
<td>0.908848</td>
<td>0.783781</td>
<td>963.206916</td>
<td>3.588444e+04</td>
<td>0.538288</td>
<td>0.084404</td>
<td>0.778405</td>
<td>0.677230</td>
<td>862.168977</td>
<td>464.137228</td>
<td>29.731848</td>
<td>979.414536</td>
</tr>
<tr>
<th>min</th>
<td>0.000000e+00</td>
<td>0.000000</td>
<td>0.000000</td>
<td>370.000000</td>
<td>6.380000e+02</td>
<td>1.000000</td>
<td>0.000000</td>
<td>0.000000</td>
<td>1.000000</td>
<td>370.000000</td>
<td>0.000000</td>
<td>1900.000000</td>
<td>0.000000</td>
</tr>
<tr>
<th>25%</th>
<td>3.228750e+05</td>
<td>3.000000</td>
<td>1.750000</td>
<td>1460.000000</td>
<td>5.000750e+03</td>
<td>1.000000</td>
<td>0.000000</td>
<td>0.000000</td>
<td>3.000000</td>
<td>1190.000000</td>
<td>0.000000</td>
<td>1951.000000</td>
<td>0.000000</td>
</tr>
<tr>
<th>50%</th>
<td>4.609435e+05</td>
<td>3.000000</td>
<td>2.250000</td>
<td>1980.000000</td>
<td>7.683000e+03</td>
<td>1.500000</td>
<td>0.000000</td>
<td>0.000000</td>
<td>3.000000</td>
<td>1590.000000</td>
<td>0.000000</td>
<td>1976.000000</td>
<td>0.000000</td>
</tr>
<tr>
<th>75%</th>
<td>6.549625e+05</td>
<td>4.000000</td>
<td>2.500000</td>
<td>2620.000000</td>
<td>1.100125e+04</td>
<td>2.000000</td>
<td>0.000000</td>
<td>0.000000</td>
<td>4.000000</td>
<td>2300.000000</td>
<td>610.000000</td>
<td>1997.000000</td>
<td>1999.000000</td>
</tr>
<tr>
<th>max</th>
<td>2.659000e+07</td>
<td>9.000000</td>
<td>8.000000</td>
<td>13540.000000</td>
<td>1.074218e+06</td>
<td>3.500000</td>
<td>1.000000</td>
<td>4.000000</td>
<td>5.000000</td>
<td>9410.000000</td>
<td>4820.000000</td>
<td>2014.000000</td>
<td>2014.000000</td>
</tr>
</tbody>
</table>
</div>
Where;
• count - is the total number of non-missing values
• mean - is the average of the dataframe
• std - is the standard deviation
• min - is the minimum value
• 25% - is the 25th percentile
• 50% - is the 50th percentile
• 75% - is the 75th percentile
• max - is the maximum value
## .isnull()
This is an important function used to check for null values in a dataset.
```python
# this function will find null values in the first 5 rows of the dataset
df.isnull().head()
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
</tr>
<tr>
<th>1</th>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
</tr>
<tr>
<th>2</th>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
</tr>
<tr>
<th>3</th>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
</tr>
<tr>
<th>4</th>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
<td>False</td>
</tr>
</tbody>
</table>
</div>
To count the number of null or missing values in the dataset, we do this:
```python
df.isnull().sum()
```
**Output:**
date 0
price 0
bedrooms 0
bathrooms 0
sqft_living 0
sqft_lot 0
floors 0
waterfront 0
view 0
condition 0
sqft_above 0
sqft_basement 0
yr_built 0
yr_renovated 0
street 0
city 0
statezip 0
country 0
dtype: int64
We can see that there are no null values because their individual sum is 0.
## .columns
This function is used to view the column names.
```python
df.columns
```
**Output:**
Index(['date', 'price', 'bedrooms', 'bathrooms', 'sqft_living', 'sqft_lot',
'floors', 'waterfront', 'view', 'condition', 'sqft_above',
'sqft_basement', 'yr_built', 'yr_renovated', 'street', 'city',
'statezip', 'country'],
dtype='object')
## Selecting a column
To select a specfic column from the dataframe, insert the name of the column into square brackets [].
```python
# return the first five values of the 'date' column in the dataframe
df[["date"]].head()
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>2014-05-02 00:00:00</td>
</tr>
<tr>
<th>1</th>
<td>2014-05-02 00:00:00</td>
</tr>
<tr>
<th>2</th>
<td>2014-05-02 00:00:00</td>
</tr>
<tr>
<th>3</th>
<td>2014-05-02 00:00:00</td>
</tr>
<tr>
<th>4</th>
<td>2014-05-02 00:00:00</td>
</tr>
</tbody>
</table>
</div>
Note: To select a column, you can decide to call the name of the column to be returned as a dataframe object or a series object. This is usually done by either using double brackets or a single bracket. Hence the reason for using double brackets the example above.
To call a variable or the specific name of a column as a Series object, you pass the name of the column into a single bracket by doing this;
```python
df['date'].head()
```
**Output:**
0 2014-05-02 00:00:00
1 2014-05-02 00:00:00
2 2014-05-02 00:00:00
3 2014-05-02 00:00:00
4 2014-05-02 00:00:00
Name: date, dtype: object
Did you notice the difference in the output of the two functions? The first output with double square brackets is a DataFrame object while this example gave an output as Series
## Grouping data
Grouping data or columns is done by using the groupby function. Example:
```python
# group the dataset by the number of bedrooms and calculate the average prize
grouped = df.groupby('bedrooms')['price'].mean()
grouped
```
**Output:**
bedrooms
0.0 1.195324e+06
1.0 2.740763e+05
2.0 3.916219e+05
3.0 4.886130e+05
4.0 6.351194e+05
5.0 7.701860e+05
6.0 8.173628e+05
7.0 1.049429e+06
8.0 1.155000e+06
9.0 5.999990e+05
Name: price, dtype: float64
## Adding Rows and Columns
You can create new rows and columns to your dataset. However, when adding a new column to your dataset, you want to choose a column that can provide additional insights or useful information for analysis.
Let's add a new column called **Price per Square Foot**.
```python
df['Price_per_Square_Ft'] = df['price'] / df['sqft_living']
df.head()
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
<th>Price_per_Square_Ft</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>2014-05-02 00:00:00</td>
<td>313000.0</td>
<td>3.0</td>
<td>1.50</td>
<td>1340</td>
<td>7912</td>
<td>1.5</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1340</td>
<td>0</td>
<td>1955</td>
<td>2005</td>
<td>18810 Densmore Ave N</td>
<td>Shoreline</td>
<td>WA 98133</td>
<td>USA</td>
<td>233.582090</td>
</tr>
<tr>
<th>1</th>
<td>2014-05-02 00:00:00</td>
<td>2384000.0</td>
<td>5.0</td>
<td>2.50</td>
<td>3650</td>
<td>9050</td>
<td>2.0</td>
<td>0</td>
<td>4</td>
<td>5</td>
<td>3370</td>
<td>280</td>
<td>1921</td>
<td>0</td>
<td>709 W Blaine St</td>
<td>Seattle</td>
<td>WA 98119</td>
<td>USA</td>
<td>653.150685</td>
</tr>
<tr>
<th>2</th>
<td>2014-05-02 00:00:00</td>
<td>342000.0</td>
<td>3.0</td>
<td>2.00</td>
<td>1930</td>
<td>11947</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1930</td>
<td>0</td>
<td>1966</td>
<td>0</td>
<td>26206-26214 143rd Ave SE</td>
<td>Kent</td>
<td>WA 98042</td>
<td>USA</td>
<td>177.202073</td>
</tr>
<tr>
<th>3</th>
<td>2014-05-02 00:00:00</td>
<td>420000.0</td>
<td>3.0</td>
<td>2.25</td>
<td>2000</td>
<td>8030</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1000</td>
<td>1000</td>
<td>1963</td>
<td>0</td>
<td>857 170th Pl NE</td>
<td>Bellevue</td>
<td>WA 98008</td>
<td>USA</td>
<td>210.000000</td>
</tr>
<tr>
<th>4</th>
<td>2014-05-02 00:00:00</td>
<td>550000.0</td>
<td>4.0</td>
<td>2.50</td>
<td>1940</td>
<td>10500</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1140</td>
<td>800</td>
<td>1976</td>
<td>1992</td>
<td>9105 170th Ave NE</td>
<td>Redmond</td>
<td>WA 98052</td>
<td>USA</td>
<td>283.505155</td>
</tr>
</tbody>
</table>
</div>
See that a new column called 'Price per Square Ft' has been added to the dataset. Let's select the column so that we can see it.
```python
# Selecting the Price_per_Square_Ft column from the dataset
df[['Price_per_Square_Ft']]
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>Price_per_Square_Ft</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>233.582090</td>
</tr>
<tr>
<th>1</th>
<td>653.150685</td>
</tr>
<tr>
<th>2</th>
<td>177.202073</td>
</tr>
<tr>
<th>3</th>
<td>210.000000</td>
</tr>
<tr>
<th>4</th>
<td>283.505155</td>
</tr>
<tr>
<th>...</th>
<td>...</td>
</tr>
<tr>
<th>4595</th>
<td>204.083885</td>
</tr>
<tr>
<th>4596</th>
<td>365.981735</td>
</tr>
<tr>
<th>4597</th>
<td>138.506368</td>
</tr>
<tr>
<th>4598</th>
<td>97.320574</td>
</tr>
<tr>
<th>4599</th>
<td>148.053691</td>
</tr>
</tbody>
</table>
<p>4600 rows × 1 columns</p>
</div>
```python
df
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
<th>Price_per_Square_Ft</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>2014-05-02 00:00:00</td>
<td>3.130000e+05</td>
<td>3.0</td>
<td>1.50</td>
<td>1340</td>
<td>7912</td>
<td>1.5</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1340</td>
<td>0</td>
<td>1955</td>
<td>2005</td>
<td>18810 Densmore Ave N</td>
<td>Shoreline</td>
<td>WA 98133</td>
<td>USA</td>
<td>233.582090</td>
</tr>
<tr>
<th>1</th>
<td>2014-05-02 00:00:00</td>
<td>2.384000e+06</td>
<td>5.0</td>
<td>2.50</td>
<td>3650</td>
<td>9050</td>
<td>2.0</td>
<td>0</td>
<td>4</td>
<td>5</td>
<td>3370</td>
<td>280</td>
<td>1921</td>
<td>0</td>
<td>709 W Blaine St</td>
<td>Seattle</td>
<td>WA 98119</td>
<td>USA</td>
<td>653.150685</td>
</tr>
<tr>
<th>2</th>
<td>2014-05-02 00:00:00</td>
<td>3.420000e+05</td>
<td>3.0</td>
<td>2.00</td>
<td>1930</td>
<td>11947</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1930</td>
<td>0</td>
<td>1966</td>
<td>0</td>
<td>26206-26214 143rd Ave SE</td>
<td>Kent</td>
<td>WA 98042</td>
<td>USA</td>
<td>177.202073</td>
</tr>
<tr>
<th>3</th>
<td>2014-05-02 00:00:00</td>
<td>4.200000e+05</td>
<td>3.0</td>
<td>2.25</td>
<td>2000</td>
<td>8030</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1000</td>
<td>1000</td>
<td>1963</td>
<td>0</td>
<td>857 170th Pl NE</td>
<td>Bellevue</td>
<td>WA 98008</td>
<td>USA</td>
<td>210.000000</td>
</tr>
<tr>
<th>4</th>
<td>2014-05-02 00:00:00</td>
<td>5.500000e+05</td>
<td>4.0</td>
<td>2.50</td>
<td>1940</td>
<td>10500</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1140</td>
<td>800</td>
<td>1976</td>
<td>1992</td>
<td>9105 170th Ave NE</td>
<td>Redmond</td>
<td>WA 98052</td>
<td>USA</td>
<td>283.505155</td>
</tr>
<tr>
<th>...</th>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
<td>...</td>
</tr>
<tr>
<th>4595</th>
<td>2014-07-09 00:00:00</td>
<td>3.081667e+05</td>
<td>3.0</td>
<td>1.75</td>
<td>1510</td>
<td>6360</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1510</td>
<td>0</td>
<td>1954</td>
<td>1979</td>
<td>501 N 143rd St</td>
<td>Seattle</td>
<td>WA 98133</td>
<td>USA</td>
<td>204.083885</td>
</tr>
<tr>
<th>4596</th>
<td>2014-07-09 00:00:00</td>
<td>5.343333e+05</td>
<td>3.0</td>
<td>2.50</td>
<td>1460</td>
<td>7573</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1460</td>
<td>0</td>
<td>1983</td>
<td>2009</td>
<td>14855 SE 10th Pl</td>
<td>Bellevue</td>
<td>WA 98007</td>
<td>USA</td>
<td>365.981735</td>
</tr>
<tr>
<th>4597</th>
<td>2014-07-09 00:00:00</td>
<td>4.169042e+05</td>
<td>3.0</td>
<td>2.50</td>
<td>3010</td>
<td>7014</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>3010</td>
<td>0</td>
<td>2009</td>
<td>0</td>
<td>759 Ilwaco Pl NE</td>
<td>Renton</td>
<td>WA 98059</td>
<td>USA</td>
<td>138.506368</td>
</tr>
<tr>
<th>4598</th>
<td>2014-07-10 00:00:00</td>
<td>2.034000e+05</td>
<td>4.0</td>
<td>2.00</td>
<td>2090</td>
<td>6630</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1070</td>
<td>1020</td>
<td>1974</td>
<td>0</td>
<td>5148 S Creston St</td>
<td>Seattle</td>
<td>WA 98178</td>
<td>USA</td>
<td>97.320574</td>
</tr>
<tr>
<th>4599</th>
<td>2014-07-10 00:00:00</td>
<td>2.206000e+05</td>
<td>3.0</td>
<td>2.50</td>
<td>1490</td>
<td>8102</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1490</td>
<td>0</td>
<td>1990</td>
<td>0</td>
<td>18717 SE 258th St</td>
<td>Covington</td>
<td>WA 98042</td>
<td>USA</td>
<td>148.053691</td>
</tr>
</tbody>
</table>
<p>4600 rows × 19 columns</p>
</div>
Now to add a new row, do this;
```python
# Create a dictionary with the new row data
new_row_data = {
'date': '2014-07-10 00:00:00',
'price': 350000.000000,
'bedrooms': 3.0,
'bathrooms': 2.5,
'sqft_living': 1800,
'sqft_lot': 8000,
'floors': 2.0,
'waterfront': 0,
'view': 0,
'condition': 3,
'sqft_above': 1800,
'sqft_basement': 0,
'yr_built': 1990,
'yr_renovated': 0,
'street': '1234 New St',
'city': 'Seattle',
'statezip': 'WA 98105',
'country': 'USA'
}
# Calculate the index for the new row
new_row_index = len(df)
# Assign the new row data to the DataFrame using .loc
df.loc[new_row_index] = new_row_data
# Display the updated DataFrame
df.tail()
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
<th>Price_per_Square_Ft</th>
</tr>
</thead>
<tbody>
<tr>
<th>4596</th>
<td>2014-07-09 00:00:00</td>
<td>534333.333333</td>
<td>3.0</td>
<td>2.5</td>
<td>1460</td>
<td>7573</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1460</td>
<td>0</td>
<td>1983</td>
<td>2009</td>
<td>14855 SE 10th Pl</td>
<td>Bellevue</td>
<td>WA 98007</td>
<td>USA</td>
<td>365.981735</td>
</tr>
<tr>
<th>4597</th>
<td>2014-07-09 00:00:00</td>
<td>416904.166667</td>
<td>3.0</td>
<td>2.5</td>
<td>3010</td>
<td>7014</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>3010</td>
<td>0</td>
<td>2009</td>
<td>0</td>
<td>759 Ilwaco Pl NE</td>
<td>Renton</td>
<td>WA 98059</td>
<td>USA</td>
<td>138.506368</td>
</tr>
<tr>
<th>4598</th>
<td>2014-07-10 00:00:00</td>
<td>203400.000000</td>
<td>4.0</td>
<td>2.0</td>
<td>2090</td>
<td>6630</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1070</td>
<td>1020</td>
<td>1974</td>
<td>0</td>
<td>5148 S Creston St</td>
<td>Seattle</td>
<td>WA 98178</td>
<td>USA</td>
<td>97.320574</td>
</tr>
<tr>
<th>4599</th>
<td>2014-07-10 00:00:00</td>
<td>220600.000000</td>
<td>3.0</td>
<td>2.5</td>
<td>1490</td>
<td>8102</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1490</td>
<td>0</td>
<td>1990</td>
<td>0</td>
<td>18717 SE 258th St</td>
<td>Covington</td>
<td>WA 98042</td>
<td>USA</td>
<td>148.053691</td>
</tr>
<tr>
<th>4600</th>
<td>2014-07-10 00:00:00</td>
<td>350000.000000</td>
<td>3.0</td>
<td>2.5</td>
<td>1800</td>
<td>8000</td>
<td>2.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1800</td>
<td>0</td>
<td>1990</td>
<td>0</td>
<td>1234 New St</td>
<td>Seattle</td>
<td>WA 98105</td>
<td>USA</td>
<td>NaN</td>
</tr>
</tbody>
</table>
</div>
The first line of code is creating a dictionary called new_row_data where the keys are the column names of your DataFrame and the values are the new data you want to add.
The second line of the code calculates the new row's index as the new row will be added at the end of the DataFrame.
In the third line of code, the **.loc** function is used to assign the new_row_data to the DataFrame at the calculated index.
And then lastly, we display the DataFrame using the df.tail() function as this will display the last five rows of the Dataframe.
## .iloc and .loc
The .iloc() and .loc() functions are used in Pandas to access data in a DataFrame using different types of indexing.
.iloc() is for integer-based indexing - meaning you can specify the position of rows and columns using integer indices, while .loc() is for label-based indexing - meaning you can specify the names(labels) of the rows and columns.
### Here's how to use .iloc():
Accessing a specific row based on its integer index.
```python
# Accessing the row at index 0
df.iloc[0]
```
**Output:**
date 2014-05-02 00:00:00
price 313000.0
bedrooms 3.0
bathrooms 1.5
sqft_living 1340
sqft_lot 7912
floors 1.5
waterfront 0
view 0
condition 3
sqft_above 1340
sqft_basement 0
yr_built 1955
yr_renovated 2005
street 18810 Densmore Ave N
city Shoreline
statezip WA 98133
country USA
Price_per_Square_Ft 233.58209
Name: 0, dtype: object
Accessing a specific column within a row:
```python
# Access the 'price' column of the row at index 0
df.iloc[0, 1]
```
**Output:**
313000.0
Accessing multiple rows and columns using slices:
```python
# Access rows at index 0 to 2(inclusive) and columns at index 0 to 4
df.iloc[0:3, 0:4]
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>2014-05-02 00:00:00</td>
<td>313000.0</td>
<td>3.0</td>
<td>1.5</td>
</tr>
<tr>
<th>1</th>
<td>2014-05-02 00:00:00</td>
<td>2384000.0</td>
<td>5.0</td>
<td>2.5</td>
</tr>
<tr>
<th>2</th>
<td>2014-05-02 00:00:00</td>
<td>342000.0</td>
<td>3.0</td>
<td>2.0</td>
</tr>
</tbody>
</table>
</div>
Changing a value in a specific cell:
```python
# Change the price in the first row to 350000
df.iloc[0, 1] = 350000
df.iloc[0]
```
**Output:**
date 2014-05-02 00:00:00
price 350000.0
bedrooms 3.0
bathrooms 1.5
sqft_living 1340
sqft_lot 7912
floors 1.5
waterfront 0
view 0
condition 3
sqft_above 1340
sqft_basement 0
yr_built 1955
yr_renovated 2005
street 18810 Densmore Ave N
city Shoreline
statezip WA 98133
country USA
Price_per_Square_Ft 233.58209
Name: 0, dtype: object
### Here's how to use .loc():
Accessing a specified row based on its label:
```python
# Access the row with index 4500
df.loc[4500]
```
**Output:**
date 2014-06-17 00:00:00
price 540000.0
bedrooms 3.0
bathrooms 2.75
sqft_living 2750
sqft_lot 18029
floors 1.0
waterfront 0
view 2
condition 5
sqft_above 1810
sqft_basement 940
yr_built 1978
yr_renovated 0
street 4708 154th Pl SE
city Bellevue
statezip WA 98006
country USA
Price_per_Square_Ft 196.363636
Name: 4500, dtype: object
Accessing a specified column within a row using the name of the column.
```python
# Access the 'price' column of the row with index 5
df.loc[5, 'price']
```
**Output:**
490000.0
Accessing multiple rows and columns using label slices or lists.
```python
# Access rows with indices 0 to 3 and columns 'price' and 'bedrooms'
df.loc[0:3, ['price', 'bedrooms']]
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>price</th>
<th>bedrooms</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>350000.0</td>
<td>3.0</td>
</tr>
<tr>
<th>1</th>
<td>2384000.0</td>
<td>5.0</td>
</tr>
<tr>
<th>2</th>
<td>342000.0</td>
<td>3.0</td>
</tr>
<tr>
<th>3</th>
<td>420000.0</td>
<td>3.0</td>
</tr>
</tbody>
</table>
</div>
The key difference between .iloc() and .loc() is that, .loc() uses integer indices to access rows and columns, while .loc() uses labels(names).
## Dropping Rows and Columns
Here's how to drop a row from your dataset:
```python
# Specify the index of the row you want to drop
row_to_drop = 4
# Drop the column and return a new DataFrame
df_new = df.drop(row_to_drop)
# Display the new dataset
df_new.head()
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>city</th>
<th>statezip</th>
<th>country</th>
<th>Price_per_Square_Ft</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>2014-05-02 00:00:00</td>
<td>350000.0</td>
<td>3.0</td>
<td>1.50</td>
<td>1340</td>
<td>7912</td>
<td>1.5</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1340</td>
<td>0</td>
<td>1955</td>
<td>2005</td>
<td>18810 Densmore Ave N</td>
<td>Shoreline</td>
<td>WA 98133</td>
<td>USA</td>
<td>233.582090</td>
</tr>
<tr>
<th>1</th>
<td>2014-05-02 00:00:00</td>
<td>2384000.0</td>
<td>5.0</td>
<td>2.50</td>
<td>3650</td>
<td>9050</td>
<td>2.0</td>
<td>0</td>
<td>4</td>
<td>5</td>
<td>3370</td>
<td>280</td>
<td>1921</td>
<td>0</td>
<td>709 W Blaine St</td>
<td>Seattle</td>
<td>WA 98119</td>
<td>USA</td>
<td>653.150685</td>
</tr>
<tr>
<th>2</th>
<td>2014-05-02 00:00:00</td>
<td>342000.0</td>
<td>3.0</td>
<td>2.00</td>
<td>1930</td>
<td>11947</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1930</td>
<td>0</td>
<td>1966</td>
<td>0</td>
<td>26206-26214 143rd Ave SE</td>
<td>Kent</td>
<td>WA 98042</td>
<td>USA</td>
<td>177.202073</td>
</tr>
<tr>
<th>3</th>
<td>2014-05-02 00:00:00</td>
<td>420000.0</td>
<td>3.0</td>
<td>2.25</td>
<td>2000</td>
<td>8030</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1000</td>
<td>1000</td>
<td>1963</td>
<td>0</td>
<td>857 170th Pl NE</td>
<td>Bellevue</td>
<td>WA 98008</td>
<td>USA</td>
<td>210.000000</td>
</tr>
<tr>
<th>5</th>
<td>2014-05-02 00:00:00</td>
<td>490000.0</td>
<td>2.0</td>
<td>1.00</td>
<td>880</td>
<td>6380</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>880</td>
<td>0</td>
<td>1938</td>
<td>1994</td>
<td>522 NE 88th St</td>
<td>Seattle</td>
<td>WA 98115</td>
<td>USA</td>
<td>556.818182</td>
</tr>
</tbody>
</table>
</div>
You can see that row 4 is no longer in the dataset.
Here's how to drop a column from your dataset:
```python
# Specify the name of the column you want to drop
column_to_drop = 'city'
# Drop the column and return a new Dataframe
df_new = df.drop(columns=[column_to_drop])
#Display the new DataFrame
df_new.head()
```
**Output:**
<div>
<style scoped>
</style>
<table border="1" class="dataframe">
<thead>
<tr style="text-align: right;">
<th></th>
<th>date</th>
<th>price</th>
<th>bedrooms</th>
<th>bathrooms</th>
<th>sqft_living</th>
<th>sqft_lot</th>
<th>floors</th>
<th>waterfront</th>
<th>view</th>
<th>condition</th>
<th>sqft_above</th>
<th>sqft_basement</th>
<th>yr_built</th>
<th>yr_renovated</th>
<th>street</th>
<th>statezip</th>
<th>country</th>
<th>Price_per_Square_Ft</th>
</tr>
</thead>
<tbody>
<tr>
<th>0</th>
<td>2014-05-02 00:00:00</td>
<td>350000.0</td>
<td>3.0</td>
<td>1.50</td>
<td>1340</td>
<td>7912</td>
<td>1.5</td>
<td>0</td>
<td>0</td>
<td>3</td>
<td>1340</td>
<td>0</td>
<td>1955</td>
<td>2005</td>
<td>18810 Densmore Ave N</td>
<td>WA 98133</td>
<td>USA</td>
<td>233.582090</td>
</tr>
<tr>
<th>1</th>
<td>2014-05-02 00:00:00</td>
<td>2384000.0</td>
<td>5.0</td>
<td>2.50</td>
<td>3650</td>
<td>9050</td>
<td>2.0</td>
<td>0</td>
<td>4</td>
<td>5</td>
<td>3370</td>
<td>280</td>
<td>1921</td>
<td>0</td>
<td>709 W Blaine St</td>
<td>WA 98119</td>
<td>USA</td>
<td>653.150685</td>
</tr>
<tr>
<th>2</th>
<td>2014-05-02 00:00:00</td>
<td>342000.0</td>
<td>3.0</td>
<td>2.00</td>
<td>1930</td>
<td>11947</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1930</td>
<td>0</td>
<td>1966</td>
<td>0</td>
<td>26206-26214 143rd Ave SE</td>
<td>WA 98042</td>
<td>USA</td>
<td>177.202073</td>
</tr>
<tr>
<th>3</th>
<td>2014-05-02 00:00:00</td>
<td>420000.0</td>
<td>3.0</td>
<td>2.25</td>
<td>2000</td>
<td>8030</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1000</td>
<td>1000</td>
<td>1963</td>
<td>0</td>
<td>857 170th Pl NE</td>
<td>WA 98008</td>
<td>USA</td>
<td>210.000000</td>
</tr>
<tr>
<th>4</th>
<td>2014-05-02 00:00:00</td>
<td>550000.0</td>
<td>4.0</td>
<td>2.50</td>
<td>1940</td>
<td>10500</td>
<td>1.0</td>
<td>0</td>
<td>0</td>
<td>4</td>
<td>1140</td>
<td>800</td>
<td>1976</td>
<td>1992</td>
<td>9105 170th Ave NE</td>
<td>WA 98052</td>
<td>USA</td>
<td>283.505155</td>
</tr>
</tbody>
</table>
</div>
Now, the 'city' column is no longer present in the dataset.
## Conclusion
Pandas is a crucial tool for data work in Python. We've demonstrated how Pandas can effectively help manipulate and analyze housing data. Whether you're a beginner or a seasoned professional, Pandas provides a variety of features to make your data analysis smoother.
For more information, check out the official Pandas [documentation](https://pandas.pydata.org/docs/) and online tutorials for advanced topics and features. Happy coding!
| ugonma |
1,897,302 | The Body Shop of Security: Biometrics | Introduction Biometrics is a physical security technique that makes use of a person's... | 0 | 2024-06-22T19:48:39 | https://dev.to/swayam_248/the-body-shop-of-security-biometrics-2hba | security, learning, productivity | ## Introduction
Biometrics is a physical security technique that makes use of a person's physical characteristics which are unique to that person.
This technique is used to authenticate the user's identity and grant access to the certain things. It is a kind of personal touch for authentication which can only be done by the genuine user.
## Types of Biometrics
**_Physiological : _** Physiological Biometrics is based on a person's body's unique features like fingerprints, facial recognition, iris scan, etc. This system of authentication is difficult to forge as compared to passwords. This type of security will remain constant throughout the person's life as physiological traits are generally stable.
**_Behavioral : _** Behavioral Biometrics is based on how a person interacts with the system like typing pattern, voice patterns, mouse movements, touchscreen interactions, etc. This system instead of relying on physical features, analyze how a person interacts with the devices to identify the user. It works invisibly as they can adapt to the changing habits over time which offers a continuous security. Limited data on a new user can make initial identification difficult.
## Advantages
- Elimination of the need of remembering complex passwords.
- Unauthorised access is equal to none as it is difficult to impersonate someone completely but [Deepfake](https://dev.to/swayam_248/deepfake-nightmares-mitigating-the-threat-of-ai-fueled-masquerade-attacks-388k) stands as an exception.
- Biometrics is generally faster as compared to manual entry of passwords. Even if [Password Managers](https://dev.to/swayam_248/password-managers-the-future-of-logins-5dkc) do autofill the login credentials, biometrics is generally considered as the fastest option.
- Accuracy level is high.
## Disadvantages
- Accuracy limit is one of the concerns when the system refuses to identify the genuine user incase of inadequate light during facial recognition, dirty fingers during fingerprint validation. False positives may cause trouble sometimes.
- Storing the biometrics data is a challenging task.
- Some biometrics security operations are costly such as iris recognition.
_Biometrics offer a secure and speedy way to ditch passwords, but privacy concerns need to be addressed for wider trust._ | swayam_248 |
1,897,301 | Responsive design principles | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-22T19:44:28 | https://dev.to/shivansh_vohra_2d13220efa/responsive-design-principles-1aba | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
As kids we all played the game where the toy had to be put in the box of the same shape,Imagine you had a toy that changes shape to fit into any box,Responsive design is like that for websites.This is done by changing layouts so they always fit just-right
| shivansh_vohra_2d13220efa |
1,897,300 | Lynx - A Fast, Secure and Reliable Terraform Backend | Lynx is a Fast, Secure and Reliable Terraform Backend. It is built in Elixir with Phoenix... | 0 | 2024-06-22T19:43:01 | https://dev.to/clivern/lynx-a-fast-secure-and-reliable-terraform-backend-4fi0 | devops, terraform, elixir | **[Lynx](https://github.com/Clivern/Lynx) is a Fast, Secure and Reliable Terraform Backend. It is built in Elixir with Phoenix framework.**
**Features:**
- Simplified Setup: Easy installation and maintenance for hassle-free usage.
- Team Collaboration: Manage multiple teams and users seamlessly.
- User-Friendly Interface: Enjoy a visually appealing dashboard for intuitive navigation.
- Project Flexibility: Support for multiple projects within each team.
- Environment Management: Create and manage multiple environments per project.
- State Versioning: Keep track of Terraform state versions for better control.
- Rollback Capability: Easily revert to previous states for efficient infrastructure management.
- Terraform Locking Support: The project also supports Terraform locking, ensuring state integrity and preventing concurrent operations that could lead to data corruption
- RESTful Endpoints: for seamless teams, users, projects, environments, and snapshots management.
- Snapshots Support: for both projects and environments to ensure data integrity and provide recovery options at specific points in time.
- [Terraform Provider](https://github.com/Clivern/terraform-provider-lynx): Automate creation/updates of teams, users, projects, environments and snapshots with terraform.
- Single Sign-On (SSO): Support for OAuth2 Providers like Azure AD OAuth, Keycloak, Okta … etc
{% embed https://github.com/Clivern/Lynx %} | clivern |
1,897,277 | Real Graceful Shutdown in Kubernetes and ASP.NET Core | Our team recently developed a "Payment as a Service" solution for our company. This service aims to... | 0 | 2024-06-22T19:31:52 | https://dev.to/arminshoeibi/real-graceful-shutdown-in-kubernetes-and-aspnet-core-2290 | k8s, dotnet, cloudnative, kubernetes | Our team recently developed a "Payment as a Service" solution for our company. This service aims to provide a seamless payment integration for other microservices. We built it using an ASP.NET Core 8 and deployed it on Kubernetes (K8s).
However, <u>we've faced significant stress during deployments</u>. We often had to stay up late to perform near-rolling updates. The process wasn't a true rolling update, and it caused us considerable frustration.
Initially, our application had a 30-second graceful shutdown period. You might ask how? This is because **.NET's Generic Host** defaults the `ShutdownTimeout` to 30 seconds. However, this default setting wasn't suitable for our application, as we had long-running tasks and API calls.
We increased the shutdown timeout to 90 seconds.
```
builder.Host.ConfigureHostOptions(ho =>
{
ho.ShutdownTimeout = TimeSpan.FromSeconds(90);
});
```
but we still experienced several **SIGKILLs** after 30 seconds during our rolling updates. Initially, Kubernetes sends a **SIGTERM** signal, giving the pod 30 seconds to stop and shut down. However, our pods needed up to 90 seconds, not 30 seconds.
To address this, we needed to configure this behavior in Kubernetes. After some research, we discovered the `terminationGracePeriodSeconds` setting, which defaults to 30 seconds and was causing the SIGKILLs. We set it to 120 seconds _thirty seconds_ more than our application's maximum shutdown needed.
```
apiVersion: apps/v1
kind: Statefulset
metadata:
name: ---
spec:
containers:
- name: ---
image: ---
terminationGracePeriodSeconds: 120
```
So far, we've made two key changes.
1. Increased the `HostOptions.ShutdownTimeout`
2. Increased the `terminationGracePeriodSeconds` in the k8s manifest
After making these changes, we tested our application and everything worked flawlessly.
To validate these changes, we created a straightforward action method.
```
[Route("api/v1/graceful-shutdown")]
[ApiController]
public class GracefulShutdownController : ControllerBase
{
public async Task<IActionResult> TestAsync()
{
await Task.Delay(TimeSpan.FromSeconds(75));
return Ok();
}
}
```
We called the 'TestAsync' endpoint and <u>immediately deployed a new version using Kubernetes</u>. Our pod entered the terminating state with a 120-second grace period provided by Kubernetes, while our application's shutdown timeout was set to 90 seconds. The 'TestAsync' action method, designed to run for 75 seconds, executed smoothly during this transition.
However, after several updates, our downstream microservices—mostly front-end applications—reported issues where some of their HTTP calls failed during our rolling updates. After further investigation, we discovered a gap between the Nginx Ingress controller and the pod states.
We found issues on GitHub related to this, and the .NET team fixed it by replacing **IHostLifetime** with a new implementation that delays the SIGTERM signal.
We set the delay to **10 seconds**.
```
using System.Runtime.InteropServices;
namespace OPay.API.K8s;
public class DelayedShutdownHostLifetime(IHostApplicationLifetime applicationLifetime) : IHostLifetime, IDisposable
{
private IEnumerable<IDisposable>? _disposables;
public Task StopAsync(CancellationToken cancellationToken)
{
return Task.CompletedTask;
}
public Task WaitForStartAsync(CancellationToken cancellationToken)
{
_disposables =
[
PosixSignalRegistration.Create(PosixSignal.SIGINT, HandleSignal),
PosixSignalRegistration.Create(PosixSignal.SIGQUIT, HandleSignal),
PosixSignalRegistration.Create(PosixSignal.SIGTERM, HandleSignal)
];
return Task.CompletedTask;
}
protected void HandleSignal(PosixSignalContext ctx)
{
ctx.Cancel = true;
Task.Delay(TimeSpan.FromSeconds(10)).ContinueWith(t => applicationLifetime.StopApplication());
}
public void Dispose()
{
foreach (var disposable in _disposables ?? Enumerable.Empty<IDisposable>())
{
disposable.Dispose();
}
}
}
```
then register this Impl in the IoC.
```
builder.Services.AddSingleton<IHostLifetime, DelayedShutdownHostLifetime>();
```
You can find the main source of the above code from [here](https://github.com/dotnet/dotnet-docker/blob/main/samples/kubernetes/graceful-shutdown/graceful-shutdown.md#adding-a-shutdown-delay).
After implementing this shutdown delay, we eliminated deployment-related issues and significantly reduced our stress levels.
Navigate through these links to learn more:
1. https://github.com/dotnet/dotnet-docker/blob/main/samples/kubernetes/graceful-shutdown/graceful-shutdown.md#adding-a-shutdown-delay
2. https://github.com/dotnet/runtime/blob/v8.0.6/src/libraries/Microsoft.Extensions.Hosting/src/HostOptions.cs
3. https://github.com/dotnet/runtime/blob/v8.0.6/src/libraries/Microsoft.Extensions.Hosting/src/Internal/ConsoleLifetime.netcoreapp.cs
4. https://github.com/dotnet/runtime/blob/v8.0.6/src/libraries/Microsoft.Extensions.Hosting/src/Internal/Host.cs#L235
5. https://github.com/dotnet/runtime/blob/v8.0.6/src/libraries/Microsoft.Extensions.Hosting/src/Internal/ApplicationLifetime.cs
6. https://learn.microsoft.com/en-us/dotnet/core/extensions/generic-host?tabs=appbuilder#hosting-shutdown-process
| arminshoeibi |
1,897,285 | What is recursion? | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-22T19:26:48 | https://dev.to/gift_mugweni_1c055b418706/what-is-recursion-1o34 | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
Recursion is solving a problem by breaking it into smaller simpler problems that follow a set pattern.
## Additional Context
<!-- Please share any additional context you think the judges should take into consideration as it relates to your One Byte Explainer. -->
<!-- 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 to your post (if you want). -->
<!-- Thanks for participating! --> | gift_mugweni_1c055b418706 |
1,897,280 | Focus | One of the five Scrum values is Focus. There are many ways in which developers can apply the concept... | 0 | 2024-06-22T19:24:11 | https://dev.to/mlr/focus-421d | development, developers, management, workplace | One of the five Scrum values is Focus. There are many ways in which developers can apply the concept of focus. There are also many ways in which developers, managers, and organizations as a whole can impede the application of focus.
When developers lose focus, the quality of code suffers, productivity suffers, and most importantly, the developers suffer.
## Singular Goal, Realistic Planning, and Elimination of Multitasking
In Scrum, there is always a Sprint Goal. This goal is singular, transparent, and as brief as possible, which helps developers focus on an achievable outcome.
Realistic planning makes a world of difference for the outcome of a Sprint. Developers have issues that come up during the Sprint, they get stuck on problems in the code they’re trying to write, unexpected business needs come up; I could go on and on about this one. Planning more lightly makes it easier to be flexible and still deliver on the goal.
Eliminate multitasking wherever it crops up. It’s often the case that management has dictated that progress must be demonstrated on a daily basis towards multiple different outcomes. In some cases, developers try to switch back and forth between two or three work items throughout the week without finishing any of them. There are all sorts of cases in between and outside these.
## Examples
Let’s look at a couple of scenarios that might resonate with you.
### Scenario 1
The developers work on enterprise applications in an IT department for a finance company. There are 20 different applications for which they are responsible. Every Sprint, a mix of critical items for the bookkeeping software, CRM, and mobile banking app are added for developers to work on. The plan has been "maximized" for the amount of work management thinks the development team can handle over the course of the Sprint.
Each developer has gained specialized knowledge of one of these applications and has taken “ownership” of the application. Alice specializes in the mobile banking app, and Chris specializes in the bookkeeping software. Both Alice and Chris also help the remaining developers work on the CRM. Management wants to see progress on each of the three applications every day for each developer.
By the end of the Sprint, nothing has been released. Small advances were made towards completing some of the work for each app, but it will take at least one or two more Sprints before a release can be made for each of the three apps.
### Scenario 2
The developers work on enterprise applications for a global shipping company. They have several different applications they are responsible for, much like the team from Scenario 1. During their current Sprint, they have planned to work on a new feature for the inventory management application. The new feature will allow other employees of the organization to add images and details about faulty products in the inventory and report them to inventory management and operations teams for investigation. The feature is a small part of a much bigger tool they want to integrate into the application for managing and reporting faulty products. With that in mind, they have planned lightly, allowing for flexibility to add or remove items and still accomplish their goal.
Each developer on the team selects one item to work on at a time, all of which are related to the eventual release of this new feature. As developers get stuck, they ask others on the team for help and work together to remove blockers as soon as possible. They complete all their work for the feature halfway through the Sprint and are able to pick up additional work to fix some bugs in the application and pay down other technical debt.
## Analysis
The team in Scenario 1 is likely familiar to most of us. I’ve worked at several places that take this approach. Management lets the team plan the work but says the team must work on more than one specific goal, they must maximize the amount of work planned, and they must demonstrate progress is being made on all the applications every day.
Having no singular goal encourages the team to break into specialist groups where some developers work on a specific application and everyone else gains little experience in the domain. Inevitably, when another developer gets stuck on their own work item, others on the team must pause their work—work that is in an entirely different application—and switch over to helping that developer. In this process, the developer(s) who have swooped in to help have to shift their mindset towards the new application and go through significant learning in order to familiarize themselves with the problem. By the time they switch back to their own work, they have lost track of what they were doing and have difficulty restarting.
Lastly, in this scenario, the original plan for the Sprint left no room for flexibility. If a team member gets stuck and takes longer than anticipated to complete their work, then there’s little chance of a release happening any time during the Sprint.
On the other hand, the team in Scenario 2 created a clear goal for their Sprint around creating a small, usable feature that was part of a much larger tool. They planned light to accommodate any issues that might arise or unplanned surprises. Their common goal and light planning meant that they could essentially eliminate multitasking, focusing entirely on moving one item at a time towards the bigger release, only having to switch contexts when offering assistance to a peer. Even so, the close relation between all the work in the Sprint implied the lagged time between each context switch was minimized as developers were able to share knowledge across the same domain.
## Conclusion
To reiterate, it’s critical for the success to allow developers to focus. Three great starting points to accomplish this are:
1. **Have a Sprint Goal**: The Sprint Goal should be singular, clear, and concise.
2. **Realistic Planning**: Have a light plan that can accommodate more or less work as issues and surprises arise.
3. **Eliminate Multitasking**: Arguably, points 1 and 2 feed into making this possible. However, developers and managers must understand that multitasking involves context switching, and the lag time accrued in context switching causes a loss in productivity.
Let me know which of these two scenarios is most familiar to you or if you've encountered another type of workplace or management style that doesn't match up with either of the ones here. Thanks for reading! | mlr |
1,897,284 | WebGPU Basics: How to Create a Triangle | Hello 👋, it's been a minute. How's life and all that good stuff? Anyway to get myself back into the... | 0 | 2024-06-22T19:19:16 | https://giftmugweni.hashnode.dev/webgpu-basics-how-to-create-a-triangle | webgpu, tutorial, beginners | Hello 👋, it's been a minute. How's life and all that good stuff? Anyway to get myself back into the groove I thought I'd start where I left off, Graphics Programming specifically using WebGPU.
In this series, I'll give semi-tutorials on working with WebGPU and the shading language WGSL which I'll explain as and when is necessary so hopefully you can also dive into this crazy world of making art with code and maths.
To keep things simple, this article will teach you how to make the equivalent of a "Hello World" in shader land which is a triangle because drawing text to screen turns out to be really hard. See this [video](https://www.youtube.com/watch?v=SO83KQuuZvg&pp=ygUWY29kaW5nIGFkdmVudHVyZXMgdGV4dA%3D%3D) if you think I'm lying. With this example, you'll fully get to experience the basic flow of working with WebGPU and I'll also point to some resources I came across that you can read up on that helped me start this journey.
Before we begin, let's answer a few obvious questions.
**Question: What is WebGPU?**
**Answer:** It's a graphics API
**Question: What does that mean?**
**Answer:** It is software that helps you utilize the Graphics Card(GPU) that comes with every modern computer/smartphone to either draw stuff on the screen or do more general computations on the graphics card e.g. matrix math.
**Question: Why would I ever need to use a GPU can't my CPU do all that already?**
**Answer:** Yes it can but because of how a CPU is designed, as you get more sophisticated with your graphics or you need to do a lot of simple stuff in parallel, it will struggle a lot and not be efficient. That's where we use GPUs that have been purpose-built for such tasks.
With that preamble in place, let us talk about browser support. As I mentioned in my previous article, WebGPU is still relatively new so, browser support hasn't fully rolled out yet at the time of writing, you can only use the API on the latest Chrome, Edge, Opera, Chrome for Android, Samsung Internet and Opera Mobile browsers. Safari support is present in the Technical Preview only so far. So yeah, as you can see, it hasn't rolled out fully yet but the rollout is being actively worked on and you can check on this [site](https://caniuse.com/webgpu), where support will be as time goes on. I don't think this browser support state is much of an issue but, it is something to be aware of.
Now that's done, let's see what we will be drawing today.
Looks beautiful right? This triangle and all the following code come from this wonderful site called [WebGPU Fundamentals](https://webgpufundamentals.org/) that goes in-depth into WebGPU and is a great resource to learn about Web GPU but, it does look a bit intimidating when you first visit it so I thought I'd make this series to give an easier entry point to jump off from.
Although I did say it's an easier entry point, I still need to make some assumptions for brevity. The first assumption is that you are familiar with modern JavaScript and are comfortable with basic HTML and CSS though we won't use the latter two all that much. If you are not familiar with any of these, here are some great playlists made by the YouTuber [The Net Ninja](https://www.youtube.com/@NetNinja) that will get you up to speed. He also makes other great videos in general so feel free to check him out.
* [Learning HTML](https://www.youtube.com/watch?v=Y1BlT4_c_SU&list=PL4cUxeGkcC9ibZ2TSBaGGNrgh4ZgYE6Cc)
* [Learning CSS](https://www.youtube.com/watch?v=I9XRrlOOazo&list=PL4cUxeGkcC9gQeDH6xYhmO-db2mhoTSrT)
* [Learning Modern JavaScript](https://www.youtube.com/watch?v=iWOYAxlnaww&list=PL4cUxeGkcC9haFPT7J25Q9GRB_ZkFrQAc)
* [Learning Async JavaScript](https://www.youtube.com/watch?v=ZcQyJ-gxke0&list=PL4cUxeGkcC9jx2TTZk3IGWKSbtugYdrlu)
Assuming you have explored those resources or already have the basics covered, let's set up our basic HTML page.
```xml
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>WebGPU</title>
<style>
html, body {
height: 100%;
margin: 0;
}
.container {
display: flex;
min-width: 100%;
min-height: 100%;
align-items: center;
justify-content: center;
background-color: black;
}
.display {
min-width: 100%;
min-height: 100%;
}
</style>
<script src="main.js" defer></script>
</head>
<body>
<div class="container">
<canvas id="webgpu-output" class="display"></canvas>
</div>
</body>
</html>
```
So there's nothing fancy with this code snippet here. Just make a basic page and resize the canvas element to which we will be drawing to to fill the entire page. Aside from that, we also include a "main.js" file which will contain all of our code from here on out.
Before I begin though, look at this meme and internalize it for the rest of this article.
The GPU exists in a different world from the CPU. In GPU land, many things are different and some things that might be simple in the CPU are a nightmare in the GPU and vice versa. Because of this, drawing a triangle ends up being a bit involved.
Having set your expectations, let us draw our lovely triangle.
First, we need to get permission to use the GPU. For that, we enter the below code.
```javascript
function fail(msg) {
alert(msg);
}
async function main() {
// get GPU device
const adapter = await navigator.gpu?.requestAdapter();
const device = await adapter?.requestDevice();
if (!device) {
fail('need a browser that supports WebGPU');
return;
}
```
Now, I could go in-depth into the fine details going on here but this is a beginners' course so all we need to know is that if the `device` variable is not `undefined`, congratulations 👏👏👏 we now have our GPU device and can continue forward. For a more in-depth explanation, check out the [Fundamentals Article](https://webgpufundamentals.org/webgpu/lessons/webgpu-fundamentals.html) on the WebGPU Fundamentals website.
Moving on, we need to prepare the canvas so that it understands the eventual commands we will send to it.
```javascript
// Get a WebGPU context from the canvas and configure it
const canvas = document.getElementById('webgpu-output');
const context = canvas.getContext('webgpu');
const presentationFormat = navigator.gpu.getPreferredCanvasFormat();
context.configure({
device,
format: presentationFormat,
});
```
The main role of this section of code is to ensure that the canvas understands the draw commands it will eventually get from our drawing code.
Moving on, let's set up our shader code.
```javascript
const module = device.createShaderModule({
label: 'our hardcoded triangle shaders',
code: `
// data structure to store output of vertex function
struct VertexOut {
@builtin(position) pos: vec4f,
@location(0) color: vec4f
};
// process the points of the triangle
@vertex
fn vs(
@builtin(vertex_index) vertexIndex : u32
) -> VertexOut {
let pos = array(
vec2f( 0, 0.8), // top center
vec2f(-0.8, -0.8), // bottom left
vec2f( 0.8, -0.8) // bottom right
);
let color = array(
vec4f(1.0, .0, .0, .0),
vec4f( .0, 1., .0, .0),
vec4f( .0, .0, 1., .0)
);
var out: VertexOut;
out.pos = vec4f(pos[vertexIndex], 0.0, 1.0);
out.color = color[vertexIndex];
return out;
}
// set the colors of the area within the triangle
@fragment
fn fs(in: VertexOut) -> @location(0) vec4f {
return in.color;
}
`,
});
```
This right here is the meat of the topic. I understand that this code can be overwhelming so, let's make broad strokes for now. To understand this code, we need a basic understanding of how GPUs draw stuff on the screen.
The first important point is when drawing, GPUs only understand points, lines and triangles. Thats it. Everything that appears on the screen is decomposed into these fundamental elements. Hence, we need to think of things from this perspective to get our lovely visual showing.
The next important point is the order in which the GPUs carry out the drawing. First, it establishes all the points(vertices) of the shape we want to draw. Then it groups all three points into triangles. Afterwards, it colours in all the grouped triangles.
With this framework in mind, we can see a function called `vs` and another called `fs` . The `vs` function is where we process all our points and do any transformations if we want to whilst the `fs` function is responsible for the colouring of the respective triangles. For our starting point, I think this is good enough and if you want to know more, check out the [Fundamentals Article](https://webgpufundamentals.org/webgpu/lessons/webgpu-fundamentals.html) on the WebGPU Fundamentals website.
Now that we've had our meat, it's time to face the bone and that's us doing all the necessary plumbing to actually draw the triangle. Right now, we're still writing stuff in CPU land and we need to send this information to GPU land. and for that, we use the below code to do that transfer.
```javascript
const pipeline = device.createRenderPipeline({
label: 'our hardcoded red triangle pipeline',
layout: 'auto',
vertex: {
module,
},
fragment: {
module,
targets: [{ format: presentationFormat }],
},
});
const renderPassDescriptor = {
label: 'our basic canvas renderPass',
colorAttachments: [
{
// view: <- to be filled out when we render
clearValue: [0.3, 0.3, 0.3, 1],
loadOp: 'clear',
storeOp: 'store',
},
],
};
function render() {
// Get the current texture from the canvas context and
// set it as the texture to render to.
renderPassDescriptor.colorAttachments[0].view =
context.getCurrentTexture().createView();
// make a command encoder to start encoding commands
const encoder = device.createCommandEncoder({ label: 'our encoder' });
// make a render pass encoder to encode render specific commands
const pass = encoder.beginRenderPass(renderPassDescriptor);
pass.setPipeline(pipeline);
pass.draw(3); // call our vertex shader 3 times.
pass.end();
const commandBuffer = encoder.finish();
device.queue.submit([commandBuffer]);
}
render();
```
Again, quite a chunky bit of code here but at its core, we're just setting things up so that we can transfer our shader code to the GPU. You'd be correct to feel that this feels like too much work for such a basic triangle but bear in mind that our current use case isn't what WebGPU was made for. It's designed for drawing multiple objects moving in potentially complex patterns. At that point, it helps to think of drawing stuff in batches and the above code structure helps support that method of thinking.
And with that, we're done. You, my friend, if you've followed along now have your first-ever triangle on screen and you are destined for greatness. So what's next after this?
If you're hooked, try out the [Google Codelab project](https://codelabs.developers.google.com/your-first-webgpu-app#0) where you get to recreate the classic Conway's Game of Life and learn more about WebGPU.
I've placed all the code discussed here in a GitHub repo [here](https://github.com/Stelele/blog-webgpu-hello-world). I'd recommend you write it yourself instead. You always learn more that way instead.
In my next article, I'll talk about making much nicer visuals and hopefully get deeper into exploring shaders now that we've gotten the foundation in place. | gift_mugweni_1c055b418706 |
1,897,282 | Roberto Fa, an Introduction | Music came naturally to me at a young age. It all began in the late 90s, in the summer of Sicily.... | 0 | 2024-06-22T19:13:35 | https://dev.to/far/roberto-fa-an-introduction-51nb | music, artist, introduction, musicproduction |
Music came naturally to me at a young age. It all began in the late 90s, in the summer of Sicily. Here’s where I discovered house and techno through cassette tapes sold at the local market, usually by some Moroccan or Tunisian guy carrying tons of bootlegs (mostly copies), and sometimes originals of the latest dance music circulating Europe. I’d collect them, every Monday morning, checking the marketplace meticulously and my collection would grow. Here I am, at probably age 11 or 12 with a stereo at home and a fat collection of electronic music cassettes. Although my stereo had one more feature: it had two slots for cassettes. This blew my mind as a kid. This is where I began experimenting with mixes and also recording mixtapes (copying tracks from cassettes and recording from the radio).
As time moved on, I’d find myself an early adopter of Napster. This is where we were all first introduced to a “peer to peer network” where people had their music collections shareable publicly from their local PCs. Naturally, I’d be poking around different people’s accounts and messaging them for having good taste and making friends. And through here, I began wondering, where did all of this music come from? How did it arrive here? This is where it led to me discover IRC networks, through friends on Napster's network. On IRC I would find communities, or "channels" (chat rooms) on networks you’d connect through mIRC or some other custom IRC client. Here is where I found music communities like the channel "#gamemp3s". I started my own channel, #gamemusic. It was essentially a chat hub for people to rip and share original game audio and video game music soundtracks through file servers. We were on the forefront of mp3 file compression and eventually adopted BitTorrent the day it started. We would release music through private FTP servers where it would travel across the Internet and eventually back onto peer to peer networks from our private scene release group.
Meanwhile, during all of this, I collected synthesizers and records. I had experimented with hardware synths on and off, namely Roland and KORG synths, and of course I’d practice on a pair of cd players with a mixer. I’d record things from time to time, but it was mostly all raw energy and just having a good time. I ended up going to art school for college—the Corcoran college of Art + Design in DC. I met a ton of really talented kids in this school, it was a real intimate community with a worldly art vibe. Here’s where I really took mixing seriously—at the peak era of burning discs to play on Pioneer CDJs. Each CD held about 20 or so tracks. There was a lot of music inspired from the early to late '90s and early '00s, especially electro and disco house and techno.
I gravitated heavily towards the bloghouse era, an internet community in which was heavily inspired by French house tunes. We’re approaching 2007-8 now, and I’d DJ college parties with the latest electro house coming from NYC, LA, France, and Australia, directly onto the campuses across Virginia, including UVA, Virginia Tech, JMU, and others. I’m talking ragers with hundreds of kids going out of their mind over Daft Punk, Justice, Boys Noize and really anything associated with Ed Banger, DFA, and Turbo Records.
Later on I transferred out of the Corcoran and decided to finish my degree in NYC at the Pratt Institute. Here my music saga continued, I helped throw regular parties with friends in lower Manhattan at a venue named Dominion, and at Cameo in Williamsburg, Brooklyn. The parties always had a carefully selected lineup of both local and domestic artists. I also contributed as a graphic designer to promote the parties.
It wasn’t til about late 2019 where I started making producing a regular 9-5 structure. To be fair, it’s really a 24 hour continual process of listening, experimenting, and tinkering with my setup. I’d make at least one beat a day and since then I’m now sitting on around 300 or so original tracks I’ve produced (and am somewhat happy with). Lots of material to go through but it’s good to have a stock of instrumentals handy. In sorting out the music I decided to begin releasing through various aliases. I’m keeping them secret but making my main name, Roberto Fa, public.
Immerse yourself into the world of Roberto Fa. You can now listen to a selection of my music on my [Soundcloud](https://soundcloud.com/robertofa). I’m slowly putting together my Bandcamp, it’s a work in progress.
Thanks for the interest!
| far |
1,897,278 | DP - Memoization, The Esoteric concept, busted out in a line. | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-22T19:05:57 | https://dev.to/jainireshj/dp-memoization-the-esoteric-concept-busted-out-in-a-line-3a3h | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
Memoization is like a Tile Fall Race, where the initial runners spend their lives clearing out the fake tiles, making it easy, time effective, and fast for the latter people to run on the right tile. Though they start from the start, they finish off fast.
## Additional Context
Tile fall :
It is a fictious race, popular on games, like "Stumble Guys" .
Where group of players try to reach from one end to the other, trying to cross a look alike group of tiles.
Only to find, only a few are strong, and others fall on being stepped on.
<!-- 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 to your post (if you want). -->
<!-- Thanks for participating! --> | jainireshj |
1,897,275 | Adding Middleware to .NET Desktop Applications | Middleware is a common pattern in web development for handling cross-cutting concerns like logging,... | 0 | 2024-06-22T18:51:37 | https://dev.to/amehdaly/adding-middleware-to-net-desktop-applications-4gh | dotnetcore, designpatterns, csharp | **Middleware** is a common pattern in web development for handling cross-cutting concerns like logging, authentication, and error handling. However, in desktop applications, the concept isn't as directly supported. This article explores how you can implement middleware-like behavior in .NET desktop applications using several design patterns and strategies.
###Event Handling Middleware
One approach to implementing middleware in a .NET desktop application is through event handling. By intercepting and handling events centrally, you can insert middleware logic before the main application logic.
####Example
``` CSharp
public class Middleware
{
public void Process(object sender, EventArgs e)
{
// Middleware logic
Console.WriteLine("Middleware processing...");
}
}
public class MainApplication
{
public event EventHandler SomeEvent;
public MainApplication()
{
Middleware middleware = new Middleware();
SomeEvent += middleware.Process;
SomeEvent += MainLogic;
}
public void MainLogic(object sender, EventArgs e)
{
// Main application logic
Console.WriteLine("Main logic processing...");
}
public void TriggerEvent()
{
SomeEvent?.Invoke(this, EventArgs.Empty);
}
}
```
In this example, the Middleware class intercepts the SomeEvent event before the MainLogic method processes it. This allows you to insert any necessary preprocessing logic.
###Decorator Pattern Middleware
The decorator pattern is another effective way to add middleware-like behavior. This pattern involves wrapping functionality around specific methods, which can be particularly useful for key operations in your application.
####Example
``` csharp
public interface IComponent
{
void Execute();
}
public class MainComponent : IComponent
{
public void Execute()
{
// Main application logic
Console.WriteLine("Executing main component...");
}
}
public class MiddlewareDecorator : IComponent
{
private readonly IComponent _component;
public MiddlewareDecorator(IComponent component)
{
_component = component;
}
public void Execute()
{
// Middleware logic before
Console.WriteLine("Executing middleware before...");
_component.Execute();
// Middleware logic after
Console.WriteLine("Executing middleware after...");
}
}
// Usage
var mainComponent = new MainComponent();
var decoratedComponent = new MiddlewareDecorator(mainComponent);
decoratedComponent.Execute();
```
In this pattern, the MiddlewareDecorator wraps around the MainComponent, allowing you to insert logic before and after the main execution.
###Pipeline Pattern Middleware
For a more structured approach, you can implement a pipeline pattern. This involves creating a series of middleware components that each process a request and pass it to the next component in the pipeline.
####Example
``` csharp
public interface IMiddleware
{
void Invoke(Context context, Action next);
}
public class Context
{
// Context properties
}
public class Middleware1 : IMiddleware
{
public void Invoke(Context context, Action next)
{
// Middleware logic
Console.WriteLine("Middleware 1 processing...");
next();
}
}
public class Middleware2 : IMiddleware
{
public void Invoke(Context context, Action next)
{
// Middleware logic
Console.WriteLine("Middleware 2 processing...");
next();
}
}
public class Pipeline
{
private readonly List<IMiddleware> _middlewares = new List<IMiddleware>();
private int _currentMiddleware = -1;
public void Use(IMiddleware middleware)
{
_middlewares.Add(middleware);
}
public void Execute(Context context)
{
_currentMiddleware = -1;
Next(context);
}
private void Next(Context context)
{
_currentMiddleware++;
if (_currentMiddleware < _middlewares.Count)
{
_middlewares[_currentMiddleware].Invoke(context, () => Next(context));
}
}
}
// Usage
var pipeline = new Pipeline();
pipeline.Use(new Middleware1());
pipeline.Use(new Middleware2());
var context = new Context();
pipeline.Execute(context);
```
In this pipeline pattern, each IMiddleware component processes the Context and then calls the next middleware in the sequence.
###Conclusion
While .NET desktop applications don't natively support middleware in the same way that web frameworks like ASP.NET Core do, you can still implement middleware-like behavior using event handling, the decorator pattern, or a custom pipeline. These strategies allow you to modularize and manage cross-cutting concerns such as logging, exception handling, and more in a clean and maintainable way.
By adopting these patterns, you can improve the structure and scalability of your desktop applications, making them easier to maintain and extend over time.
| amehdaly |
1,897,274 | GSoC’24(CircuitVerse) Week 3 & 4 | This 2 weeks I have been focusing on Implementing the remaining components and VUE + TS Integration... | 0 | 2024-06-22T18:49:42 | https://dev.to/niladri_adhikary_f11402dc/gsoc24circuitverse-week-3-4-21fg | gsoc, google, circuitverse, webdev | This 2 weeks I have been focusing on Implementing the remaining components and VUE + TS Integration with removal of JQuery.
Some of the Components that I have Implemented are:
- TestBench Panel.vue
- TestBench Creator.vue
- TestBench Validator.vue
- Alert MessageBox
Vue + Typescript Integration for:
- Project.ts
- Utils.ts
- Testbench.ts
- Open Offline.vue
Pania Store came really in handy to Implement the state management very nicely, and i quite love its Functionalities
### Implementation of TestBench Components
As planned in my proposal I started with implementing the creator component using vuetify and converted all jQuery & DOM manipulations to Vue's reactives and typescript integration.
Previously we were using the creator as a separate window, so this time Creating TestBenchCreator.vue eliminated the need to a extra window and the data transmission was done using pinia to transmit data between Creator and Testbench Panel component.
Next, the TestbenchPanel that was under the extra.vue file, was converted to Vue's reactives, all UI DOM manipulations that was previously there in the testbench.js was migrated to the component using Vue and Pinia.
Other Testbench components like the testbench validator and some dialog boxes are migrated as well in the same folder.
Also created a Testbench store in the pinia store folder for reactive state management of the test data.
PR LINK - https://github.com/CircuitVerse/cv-frontend-vue/pull/323
### Vue + Typescript Integration
Typescript and Vue integrations were done in some files like project.ts, utils.ts, testbench.ts, Open Offline.vue Component initially more integrations will be done in the next weeks
PR LINK -
utils.ts - https://github.com/CircuitVerse/cv-frontend-vue/pull/325
project.ts - https://github.com/CircuitVerse/cv-frontend-vue/pull/324
Offline.vue - https://github.com/CircuitVerse/cv-frontend-vue/pull/318
| niladri_adhikary_f11402dc |
1,897,273 | refactoring C# code advices | Hello guys, i'll pay close attention of any post that can closely help anyone interested in .net and... | 0 | 2024-06-22T18:39:54 | https://dev.to/dejan_jovancevic_ns/refactoring-c-code-advices-ng7 | csharp | Hello guys, i'll pay close attention of any post that can closely help anyone interested in .net and c#.
| dejan_jovancevic_ns |
1,897,272 | Novikov Dubai Mall | Novikov Dubai Mall stands out as a culinary gem within the bustling Fashion Avenue. Nestled in this... | 0 | 2024-06-22T18:37:27 | https://dev.to/hognuvilmi/novikov-dubai-mall-34ja | [Novikov Dubai Mall](https://www.novikov-cafe.com/catalogue/novikov-giant-mille-feuille-chocolate-and-hazelnut) stands out as a culinary gem within the bustling Fashion Avenue. Nestled in this luxurious location, Novikov attracts discerning diners who appreciate both the ambiance and the artistry of fine dining. The mall, known for its high-end shopping experience, perfectly complements the upscale nature of Novikov, making it a prime destination for those looking to indulge in exceptional Mediterranean cuisine. | hognuvilmi | |
1,897,271 | My First Program: Money After Expenses | I recently started learning Python 3 on Codecademy to start my computer science journey. This program... | 0 | 2024-06-22T18:36:29 | https://dev.to/doggomaru/my-first-program-money-after-expenses-1c09 | I recently started learning Python 3 on Codecademy to start my computer science journey. This program is the first program I have ever coded on my own with no guidance. For this project, I was instructed to create a program, but I wasn't given instructions for what kind of program to write specifically. It took me a while to think about, but it occurred to me that I have a spending problem, and that a finance calculator would be really helpful to help me manage my money.
The program I created, which I have linked below, prompts users to enter their general financial information; how many hours they work per week, how much money they make hourly, and how much they spend monthly on rent, utilities, groceries, and other expenses. The program takes this information and calculates how much money the user has left after their monthly expenses, which they can put into savings or use at their discretion.
I had a very good time making this first program of mine. It was difficult coming up with an idea, but once I got the ball rolling, everything just kind of flowed into place. I wasn't confident I could write a program by myself at this point, but I ended up doing it successfully, and had my father and sister test it to ensure it worked with various inputs. While it's a simple program, I'm very proud of myself for it, and I look forward to making more complex programs in the future.
[Click Here To View The Program](https://github.com/doggomaru/money-after-expenses) | doggomaru | |
1,897,171 | Django Basics: A Comprehensive Guide | Django is a Python web framework for fast development and clean design. This guide covers the Django... | 0 | 2024-06-22T18:35:04 | https://dev.to/kihuni/django-basics-a-comprehensive-guide-4dhl | webdev, beginners, django, python | Django is a Python web framework for fast development and clean design. This guide covers the Django app structure, models, views, templates, and URL configuration. It is structured to help you build your understanding incrementally, enabling you to work efficiently with Django. By the end of the guide, you will have a comprehensive understanding of Django's core components, empowering you to build robust web applications.
## Django App Structure
A Django app is a self-contained module that delivers a specific functionality for your web project. You can reuse apps in different projects, making them modular and flexible.
Examples of Django apps include a blog, a forum, a user authentication system, or an e-commerce module.
**Creating and Organizing Apps**
Run the command `python manage.py startapp appname` to create a new app. Replace `appname` with the desired name of your app.
App Structure:
```
appname/
__init__.py
admin.py
apps.py
migrations/
__init__.py
models.py
tests.py
views.py
```
- __init__.py: Marks the directory as a Python package.
- admin.py: Contains configurations for the Django admin interface.
- apps.py: Contains app-specific configuration.
- models.py: Defines the data models.
- tests.py: Contains tests for the app.
- views.py: Contains the logic for handling requests and returning responses.
- migrations/: Manages changes to the database schema.
**Organizing Apps**
Focus Each App on a Single Piece of Functionality
Focusing each app on a single piece of functionality helps maintain clean and understandable code. This modular approach ensures that each app is self-contained and reusable across different projects. Common Practices include:
- Organize related files, such as templates, static files, and forms, within the app directory. This organization helps keep the structure clear and logical.
Example: Blog App Directory Structure
```
blog/
__init__.py
admin.py
apps.py
models.py
tests.py
views.py
templates/
blog/
post_list.html
post_detail.html
static/
blog/
css/
styles.css
forms.py
urls.py
```
Templates: Store template files in the templates/blog/ directory.
Static Files: Store static files like CSS in the static/blog/ directory.
Forms: Define forms in the forms.py file.
- Create separate apps for distinct features or sections of your project to ensure modularity and ease of maintenance.
Example: Project Directory Structure with Multiple Apps
```
myproject/
manage.py
myproject/
__init__.py
settings.py
urls.py
wsgi.py
blog/
__init__.py
admin.py
apps.py
models.py
tests.py
views.py
templates/
blog/
post_list.html
post_detail.html
static/
blog/
css/
styles.css
forms.py
urls.py
accounts/
__init__.py
admin.py
apps.py
models.py
tests.py
views.py
templates/
accounts/
login.html
signup.html
static/
accounts/
css/
accounts.css
forms.py
urls.py
```
Blog App: Contains all the files related to the blog functionality, including models, views, templates, and static files.
Accounts App: Contains all the files related to user authentication, such as login and signup templates, forms, and static files.
## Models
**Introduction to Models**
- Models are the single, definitive source of information about your data. They contain the essential fields and behaviors of the data you’re storing.
- Models define the structure of your database tables and provide a high-level abstraction for database operations.
**Defining Models and Fields**
* Basic Structure:
A model is a Python class that subclasses django.db.models.Model. Each attribute of the model represents a database field.
```
from django.db import models
class Author(models.Model):
name = models.CharField(max_length=100)
birth_date = models.DateField()
```
* Model Methods and Properties
Define custom methods to add functionality to your models.
```
class Author(models.Model):
name = models.CharField(max_length=100)
birth_date = models.DateField()
def __str__(self):
return self.name
def age(self):
return timezone.now().year - self.birth_date.year
```
## Views
**Function-based Views (FBVs)**
Function-based views are simple Python functions that take a web request and return a web response.
Example:
```
from django.http import HttpResponse
def my_view(request):
return HttpResponse("Hello, world!")
```
**Class-based Views (CBVs)**
Class-based views provide more structure and reusability by using Python classes.
```
from django.views import View
from django.http import HttpResponse
class MyView(View):
def get(self, request):
return HttpResponse("Hello, world!")
```
**Rendering Templates**
Templates generate HTML dynamically.
```
from django.shortcuts import render
def my_view(request):
return render(request, 'my_template.html', {'key': 'value'})
```
## Templates
**Template Syntax and Language**
- Django’s template language defines the layout and structure of the HTML files.
- Use curly braces and percentage signs for logic and variable substitution.
```
<h1>{{ title }}</h1>
{% for item in item_list %}
<p>{{ item }}</p>
{% endfor %}
```
**Template Inheritance and Context**
Create a base template and extend it for other pages.
```
<!-- base.html -->
<html>
<body>
{% block content %}
{% endblock %}
</body>
</html>
<!-- child.html -->
{% extends "base.html" %}
{% block content %}
<h1>Child Template</h1>
{% endblock %}
```
Context is a dictionary of variables passed to the template.
```
def my_view(request):
context = {'title': 'My Title', 'item_list': ['item1', 'item2']}
return render(request, 'my_template.html', context)
```
## URLs
**URL Configuration and Routing**
URLs define how the requests route to the appropriate view based on the URL pattern.
Example:
```
from django.urls import path
from . import views
urlpatterns = [
path('', views.index, name='index'),
path('about/', views.about, name='about'),
]
```
* Named URLs and Namespaces
Assign names to your URL patterns for easy reference.
```
urlpatterns = [
path('about/', views.about, name='about'),
]
```
* Using Named URLs:
```
<a href="{% url 'about' %}">About Us</a>
```
* Namespaces: Group URL patterns by app to avoid name clashes.
```
app_name = 'myapp'
urlpatterns = [
path('about/', views.about, name='about'),
]
```
## Conclusion
This guide has provided a structured overview of the basics of Django, from understanding the app structure to defining models, creating views, working with templates, and configuring URLs. By following these steps, you will be well-equipped to start building robust and maintainable web applications with Django. As you continue to develop your skills, you will find Django to be a powerful and versatile framework that streamlines web development and allows you to focus on creating great applications. | kihuni |
1,897,270 | SOLID PRIINCIPLES | The SOLID principles are a set of design guidelines in object-oriented programming that help create... | 0 | 2024-06-22T18:34:41 | https://dev.to/dev_eze/solid-priinciples-g5c | webdev, beginners, tutorial, dotnet |
The SOLID principles are a set of design guidelines in object-oriented programming that help create systems that are more maintainable, flexible, and scalable. Here's a breakdown of each principle letter by letter:
** S - Single Responsibility Principle (SRP):** A class should have only one reason to change, meaning it should have only one job or responsibility.
This means that each class or module should focus on a single part of the functionality provided by the software and encapsulate it. This makes the system easier to understand and modify since each component does only one thing.
Suppose you have a "User" class that handles user data and also manages user login. According to SRP, you should separate these responsibilities into two classes: "UserData" and "UserLogin".
**O - Open/Closed Principle (OCP):** Software entities (classes, modules, functions, etc.) should be open for extension but closed for modification.
This means that you should be able to add new functionality to a module without changing its existing code. This is typically achieved through polymorphism and inheritance, ensuring that new functionality can be introduced without altering existing, tested, and working code.
If you have a "Shape" class, and you want to add a new shape type, you should be able to add a new subclass (like "Circle" or "Square") without modifying the "Shape" class.
**L - Liskov Substitution Principle** **(LSP)**: Subtypes must be substitutable for their base types without altering the correctness of the program.
This means that objects of a superclass should be replaceable with objects of a subclass without affecting the functionality of the program. This ensures that a derived class enhances or extends the base class behavior without changing its expected behavior.
If you have a base class "Bird" with a method "fly()", and a subclass "Penguin", the "Penguin" class should not inherit the "fly()" method since penguins cannot fly. This violates LSP as the "Penguin" cannot substitute "Bird" in all scenarios.
**I - Interface Segregation Principle (ISP):** No client should be forced to depend on methods it does not use.
This means that It's better to have multiple small, specific interfaces rather than a single large, general-purpose interface. This keeps the interfaces lean and focused on specific client needs, avoiding the implementation of unnecessary methods.
Instead of having a large "Animal" interface with methods like "walk()", "fly()", "swim()", create smaller, more specific interfaces like "Walkable", "Flyable", "Swimmable".
** D - Dependency Inversion Principle (DIP):** High-level modules should not depend on low-level modules. Both should depend on abstractions. Abstractions should not depend on details. Details should depend on abstractions.
This simply states that depend on abstractions (interfaces or abstract classes), not on concrete implementations. This allows for flexibility and easier maintenance because high-level and low-level modules can be developed and modified independently.
Instead of a class "LightSwitch" directly controlling a "LightBulb", it should depend on an interface "Switchable" that "LightBulb" implements. This way, "LightSwitch" can control any "Switchable" device, promoting loose coupling.
##
**General Consequences of Ignoring SOLID Principles**
**Increased Technical Debt:** The codebase becomes harder to maintain and extend, accruing technical debt that slows down future development.
**Reduced Agility:** The system is less adaptable to changing requirements, making it hard to evolve and meet new business needs.
**Poor Code Quality:** The overall quality of the code suffers, leading to more bugs, difficult debugging, and a higher likelihood of introducing regressions.
**Team Productivity Issues:** Developers spend more time understanding and fixing issues in complex, tightly coupled code, reducing productivity and increasing frustration.
By adhering to these principles, developers can create systems that are more understandable, flexible, and easier to maintain, leading to higher quality software.
| dev_eze |
1,897,269 | More accessible line graphs | Earlier this week, the State of JS 2023 survey results were published and, as always, the results are... | 0 | 2024-06-22T18:34:12 | https://dev.to/emmadawsondev/more-accessible-line-graphs-3dli | webdev, a11y, design | Earlier this week, the [State of JS 2023 survey results](https://2023.stateofjs.com/en-US/) were published and, as always, the results are presented with a variety of different charts and graphs. Upon reviewing the line graphs, I noticed some common, easily fixable accessibility issues. In this post, I will discuss these issues and provide suggestions for improvement.
## Use of colour alone
The line graphs are presented with a title, a legend, and the graph itself. However, these graphs rely on color alone to convey information. This is problematic because around 1 in 12 men (approx. 8% of the population) and 1 in 200 women (approx. 0.5% of the population) have a red-green color vision deficiency. Other types of color vision deficiencies mean that about 1 in 10 people may have difficulty distinguishing all the colors used.
We can emulate color deficiencies in Chrome to demonstrate how the graphs appear to people with these conditions.
### Emulated protanopia (no red)
Without red, distinguishing between reds, oranges, yellows, and greens is challenging.
### Emulated deuteranopia (no green)
Without green, it's also difficult to distinguish between reds, oranges, yellows and greens.
### Emulated tritanopia (no blue)
Without blue, the blues and greens become difficult to distinguish and the reds and oranges also become harder to tell apart.
### Emulated achromatopsia (no colour)
Without colour, all lines become a shade of grey.
### What's the solution?
There are several ways to improve these graphs to ensure they do not rely on color alone.
#### Different Line Styles
Different line styles (e.g., dotted, dashed, and solid lines) can be used to differentiate the lines. Additionally, various shapes (e.g., circles, squares, triangles) can mark data points.
Here's an example using different shapes for each data point (albeit poorly photoshopped):
There are still some downsides with relying on a legend to communicate the relationship between data points and their category. Legends can be difficult to use for people with certain eye conditions or cognitive disabilities.
#### Label the Lines Directly
Labeling the lines directly removes the need for a legend, making it easier for users to identify each line. This approach may require more space on the y-axis to accommodate the labels, especially where lines overlap.
Here's an example with labels directly on the lines (again, a rough edit):
## Alternative text and text alternative
I tested the graph with NVDA, a screen reader, and found that it was an unusable experience. The screen reader read out each element of the y-axis first, then the x-axis, but it didn't specify what these axes represented.
When it got to the graph, it was an unusable experience for anyone using a screen reader. Each part of the graph is made up of many paths in an SVG. NVDA went wild, reading "Graphic, clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable clickable..." and any normal person is left thinking "please make it stop!!!"
The SVG should be given a `role="img"` and then an alternative text between two `<title>` tags which describes the graph. And because these graphs present a lot of information, it should ideally be presented in another way such as in a table. Screen reader users can navigate through tables to get information but presenting info in another way is also useful for many other people.
Graphs are not the easiest things for many people to read. They require quite a lot of cognitive energy to work out what the different x and y axes are and what is being shown. Giving people the option of seeing data presented in different formats helps people to understand the way they can best.
## In summary
A few small tweaks can significantly improve the accessibility of these line graphs:
- Differentiate lines by more than just color.
- Label lines directly whenever possible.
- Avoid using legends if possible.
- Present information in multiple formats, such as tables.
Implementing these changes will make the graphs more accessible and ensure that a broader audience can benefit from the valuable insights they provide.
| emmadawsondev |
1,897,976 | Unlocking the Magic Behind Seamless Streaming: How HLS Transforms Video Delivery | Have you ever wondered how platforms like YouTube don’t load entire videos at once, yet still provide... | 0 | 2024-06-23T18:13:03 | https://nnisarg.in/blog/magic-behind-video-streaming/ | api, hls, webdev, streaming | ---
title: Unlocking the Magic Behind Seamless Streaming: How HLS Transforms Video Delivery
published: true
date: 2024-06-22 18:30:00 UTC
tags: api,hls,webdev,streaming
canonical_url: https://nnisarg.in/blog/magic-behind-video-streaming/
---
Have you ever wondered how platforms like YouTube don’t load entire videos at once, yet still provide a smooth, uninterrupted viewing experience? Or how you can effortlessly switch between different video quality options to suit your internet speed? The secret lies in the technology called HLS (HTTP Live Streaming). In this blog, we'll explore the wonders of HLS Streams, their various applications, and introduce a powerful API that can convert your videos into HLS Streams effortlessly.
## The Mystery of Modern Video Streaming
When you watch a video on YouTube, you might notice that it doesn’t buffer the entire video in one go. Instead, it streams seamlessly, even as you skip ahead or switch to a different resolution. This magical experience is made possible by HLS, a protocol that chops video files into small segments and delivers them efficiently based on your internet connection and device capabilities.
## What are HLS Streams?
HLS, or HTTP Live Streaming, is a protocol developed by Apple for streaming media over the internet. It divides video content into small chunks and delivers them over HTTP, enabling adaptive bitrate streaming. This means the video quality can automatically adjust based on the viewer's bandwidth and device performance, ensuring a smooth viewing experience with minimal buffering.
Key features of HLS include:
- **Adaptive Bitrate Streaming:** Dynamically adjusts the video quality to match the viewer’s internet speed.
- **Scalability:** Uses standard HTTP servers, making it scalable and easy to deploy.
- **Cross-Platform Compatibility:** Supported on a wide range of devices, including iOS, Android, macOS, Windows, and more.
## Where are HLS Streams Used?
HLS has become the backbone of modern video streaming, used in various applications, such as:
1. **Live Streaming:** Ideal for broadcasting live events like sports, concerts, and news, offering low latency and high audience capacity.
2. **Video On Demand (VoD):** Popular streaming services like Netflix and Hulu use HLS to deliver their extensive libraries of movies and TV shows.
3. **Education:** Online learning platforms utilize HLS to provide smooth and accessible video lectures and tutorials.
4. **Corporate Communications:** Companies leverage HLS for live webinars, training sessions, and important announcements.
## Introducing EzHLS: Your Video to HLS Conversion API
To simplify the process of converting videos to HLS Streams, we’ve developed an API called [EzHLS](https://hls.nnisarg.in) that handles all the complexities for you. Our API is designed to seamlessly integrate HLS streaming capabilities into your applications, ensuring high performance and ease of use.
### Features of EzHLS:
- **Simple Integration:** User-friendly endpoints for quick and hassle-free integration.
- **High Performance:** Efficient conversion process ensuring minimal latency and high-quality output.
- **Scalability:** Capable of handling large volumes of video content, making it perfect for both small and large-scale applications.
- **Customization:** Flexible options to tailor the streaming experience to your specific needs.
- **Self-Hosting:** Option to self-host the API for greater control and customization.
You can find the repository for self-hosting on GitHub: [EzHLS Repository](https://github.com/nnisarggada/ezhls).
By leveraging **EzHLS** , you can transform your video delivery system, providing your users with the high-quality, seamless streaming experience they expect.
## Conclusion
HLS Streams are the cornerstone of modern video streaming, enabling adaptive, high-quality content delivery across various platforms and devices. With EzHLS, you can effortlessly integrate this powerful technology into your applications, ensuring your audience enjoys smooth, uninterrupted viewing every time. Unlock the magic of HLS today and elevate your video streaming capabilities to the next level. | nnisarggada |
1,897,268 | The Importance of Custom Software Development for Small Businesses | Introduction In today’s fast-paced digital world, businesses aim for efficiency and... | 0 | 2024-06-22T18:29:44 | https://dev.to/abdul_rehman_2ce56bf70f61/the-importance-of-custom-software-development-for-small-businesses-2pgc |
## Introduction
In today’s fast-paced digital world, businesses aim for efficiency and innovation. **[Custom software development](https://accuratedigitalsolutions.com/web-application-development)** appears as an essential solution, offering customized strategies to address specific business needs. Let's explore why custom software is crucial for businesses and how it can boost your activities forward.
Consider how custom software development can tackle your special business challenges and improve growth. Explore the potential benefits and opportunities it provides for simplifying processes, improving productivity, and achieving your business goals.
How Can Custom Software Development Benefit Small Businesses?
Opting for custom software development can be a game-changer for small businesses, but it's crucial to recognize when it might not be the best choice.
Custom software development might not be the right path for your small business if:
Time Constraints: If you're in a hurry to get your software up and running as soon as possible, custom development might not be the best option. It typically takes time to design and build bespoke solutions.
Sufficient Off-the-Shelf Solutions: Consider whether pre-built software solutions meet your needs adequately. Sometimes, off-the-shelf platforms can provide the functionality you require without the need for custom development.
Limited Budget: Custom software development for small businesses can be costly, especially in the initial stages. If your budget is tight, it may be challenging to justify the expense of custom development.
**
## The Benefits of Custom Software Development
**
Enhanced Efficiency: Custom software simplifies business processes, removes unnecessary tasks, and boosts overall productivity. By automating manual tasks and integrating different systems, businesses can save time and resources, enabling them to focus on core objectives. Assess your current workflows and pinpoint areas where automation and customization could streamline processes and enhance productivity. Consider how custom software solutions can improve your business operations and drive growth.
Scalability: As businesses change and grow, their software needs may shift. Custom software solutions are designed to adapt alongside the company, fitting increased demand, additional users, and changing needs without losing performance or functionality. Consider your long-term business goals and future growth plans. Evaluate how custom software solutions can meet your growing needs and adjust to future changes and extensions.
Personalisation: Custom software allows businesses to customise the user experience to meet the specific needs and choices of their target audience. By offering personalised features and options, companies can enhance customer satisfaction, loyalty, and connections. Explore ways to personalise your customer connections and experiences through custom software solutions. Consider how personalised features and options can improve customer involvement and satisfaction.
Data Security: With data violations and increasing cyber threats, data security becomes a major worry for businesses. Custom software development allows companies to apply strong security measures customised to their specific needs, protecting confidential information and guarding against possible dangers. Evaluate your current data security methods and pinpoint areas for improvement. Think about how customised software solutions can improve data security and shield your business from online dangers and breaches.
Is Custom Software Development Right for Your Business?
While making custom software can have many advantages, it may not be right for every business. Things to think about include how much money you have when you need it done, how hard it is, and finding skilled people. Look at what your business needs, what you want to do, and what might hold you back to see if making custom software is a good idea. Think about all the good things it can do for you and also the problems it might bring.
Conclusion
Making [custom software](https://accuratedigitalsolutions.com) can really help businesses run better, work faster, and grow steadily. By using special solutions made just for them, getting better at doing things, being able to grow, making things special for each customer, and keeping data safe, businesses can find new chances, beat tough times, and keep growing. Start on the right foot by thinking about making custom software. See what could happen, figure out what you need, and work with someone you can trust to make your business even better. With the right plan and help, making custom software can push your business to bigger success.
| abdul_rehman_2ce56bf70f61 | |
1,897,267 | KUMMEE QARCOO | Check out this Pen I made! | 0 | 2024-06-22T18:28:21 | https://dev.to/jonse_ketela_b13c463d2acf/kummee-qarcoo-3n9i | codepen | Check out this Pen I made!
{% codepen https://codepen.io/Jonse-ketela/pen/QWRmGZG %} | jonse_ketela_b13c463d2acf |
1,897,266 | How a newsletter system can save you time | How a newsletter system can make the annoying task of writing to a large number of recipients a dream... | 0 | 2024-06-22T18:26:55 | https://blog.disane.dev/en/how-a-newsletter-system-can-save-you-time/ | makingworkeasy, newsletter, experiencereport, automated | How a newsletter system can make the annoying task of writing to a large number of recipients a dream 🥂
---
I recently had a minor to major structural problem in our house, which is why I was looking for an expert. The IHK then gave me a list of around 15-20 experts, all of whom I wanted to write to individually. However, it was too time-consuming for me to always write the same email (except for the salutation) manually in my email program. Then I came up with the idea of using a newsletter program, which can be used very well for this and could probably also provide good services in the future.
## Why a newsletter system? 🤔
A newsletter system has the charming advantage that you can set up a campaign and save an email as a template. In addition, certain text passages can then be entered with placeholders from the user data and automatically replaced when the newsletter is sent. Mega!
## Which System? 👨💻
I started researching which system would be suitable for this. My key points were:
* Capable of running in a Docker container (free of charge)
* Import of CSV/JSON
* Beautiful and easy to use interface
During my research, I quickly came across Listmonk.
[listmonk - Free and open source self-hosted newsletter, mailing list manager, and transactional mailsSend e-mail campaigns and transactional e-mails. High performance and features packed into one app.](https://listmonk.app/)
## What can Listmonk do? 🤯
Listmonk is an open source software for managing and sending newsletters. Developed by Zerodhatech, it offers a wide range of functions that are suitable for both small companies and large corporations. The software was programmed in Go and uses a PostgreSQL database, which makes it extremely fast and efficient. Listmonk is freely available and can be used and customized by anyone. This means that you don't have to pay any license fees and have the freedom to modify the software according to your needs. By using Go and PostgreSQL, Listmonk can process millions of emails per hour. Whether you have a small list of subscribers or a huge database to manage, Listmonk can handle it with ease. Listmonk offers numerous customization options, from the design of the emails to the management of subscriber lists. You can use different templates, perform A/B tests and get detailed analysis of your campaigns.
## The installation 🛠️
If you already have a Docker host, you can simply take over the following compose file, everything essential is already integrated here. You only need to change the passwords etc. and adjust the file locations for your system.
```yaml
# NOTE: This docker-compose.yml is meant to be just an example guideline
# on how you can achieve the same. It is not intended to run out of the box
# and you must edit the below configurations to suit your needs.
version: "3.7"
x-app-defaults: &app-defaults
restart: unless-stopped
image: listmonk/listmonk:latest
ports:
- "9000:9000"
environment:
- LISTMONK_db__ssl_mode=disable
- LISTMONK_db__host=db
- LISTMONK_db__port=5432
- LISTMONK_db__user=listmonk
- LISTMONK_db__password=listmonk
- LISTMONK_db__database=listmonk
- LISTMONK_app__admin_username=your user
- LISTMONK_app__admin_password=Your PW
- TZ=Europe/Berlin
x-db-defaults: &db-defaults
image: postgres:13-alpine
ports:
- "9432:5432"
environment:
- POSTGRES_PASSWORD=listmonk
- POSTGRES_USER=listmonk
- POSTGRES_DB=listmonk
- TZ=Europe/Berlin
restart: unless-stopped
healthcheck:
test: ["CMD-SHELL", "pg_isready -U listmonk"]
interval: 10s
timeout: 5s
retries: 6
services:
db:
<<: *db-defaults
container_name: listmonk_db
volumes:
- /mnt/user/appdata/listmonk/db:/var/lib/postgresql/data
app:
<<: *app-defaults
container_name: listmonk_app
#command: [sh, -c, "yes | ./listmonk --install --config config.toml && ./listmonk --config config.toml"]
depends_on:
- db
volumes:
- /mnt/user/appdata/listmonk/config.toml:/listmonk/config.toml
- /mnt/user/appdata/listmonk/uploads:/listmonk/uploads
```
That's it for the installation. After that, Listmonk should be ready for you and it should be accessible via your IP over the port `9432`:
## Configuration of mail dispatch 📫
In the settings, you must then define which mailbox is used to send the emails. This is actually possible with every provider that offers SMTP. You can simply create as many SMTP accounts in the settings and then use them to send your campaigns.
## Import of contact data 👥
I wanted to be able to import contact data (I already had a list from the Chamber of Industry and Commerce) via CSV or JSON. As the list was available as a PDF, I asked ChatGPT to create a list for me in the expected format. This worked surprisingly well, so I quickly had all my contacts in Listmonk.
## Create mailing list 📃
I then added all the contacts to a list that I wanted to write to. Here you can also add more (existing contacts) and/or filter. I currently need all of them. However, you could also use this to create a mailing to only certain people in your area (if this data is available in Listmonk).
## Create mail template ✉️
I have created a template for my private emails that has no CI (corporate identity):
However, you could use this to create a general template that corresponds to your company's CI or your taste and then create a uniform look. The content of the campaigns is then written into the template.
So that I can see who has opened the email, I have also built in a tracking view, basically like a read confirmation.
## Create campaign 🎺
Everything then flows into the campaigns. A campaign always has a list of n contacts, a template and corresponding content. My mail content then looked like this:
As you can see, the salutation is variable here, which means that this placeholder is replaced for each mail and for each contact. Listmonk also offers a number of other variables:
[Templating - listmonk / Documentation](https://listmonk.app/docs/templating/#template-expressions)
I was then able to send this campaign to everyone on the list and even include attachments and CC/BCC recipients.
The relations between the individual objects look like this:
## Conclusion☝️
As you can see, a newsletter system, if used skillfully, can also help you with such things. The installation took me about 20 minutes and I only had to write the mail once. Together with ChatGPT, I was able to quickly convert the existing PDF list to CSV and thus process a large number of emails completely automatically. You don't have to do any more work than you already have.
The nice thing about Listmonk is that it offers an API. So you could also use it to automate things. Together with n8n, you could also import your subscribers from the blog into it and then use it to send emails. Actually pretty cool, isn't it?
---
If you like my posts, it would be nice if you follow my [Blog](https://blog.disane.dev) for more tech stuff. | disane |
1,897,265 | KUMMEE QARCOO | Check out this Pen I made! | 0 | 2024-06-22T18:24:29 | https://dev.to/jonse_ketela_b13c463d2acf/kummee-qarcoo-2bc8 | codepen | Check out this Pen I made!
{% codepen https://codepen.io/Jonse-ketela/pen/QWRmGZG %} | jonse_ketela_b13c463d2acf |
1,897,264 | The MoodScout, An innovative invention for those unplanned lazy geeze | This is a submission for the Twilio Challenge What I Built We have built a Mood Scout... | 0 | 2024-06-22T18:22:47 | https://dev.to/jainireshj/the-moodscout-an-innovative-invention-for-those-unplanned-lazy-geeze-545m | devchallenge, twiliochallenge, ai, twilio | *This is a submission for the [Twilio Challenge ](https://dev.to/challenges/twilio)*
## What I Built
We have built a Mood Scout web application, which takes in your mood or "what you feel like doing, right now", as an input, and suggests you the best places according to your mood, around you with their directions, sent right down to your phone for easy navigation.
## The AI catch of our application
Unlike the exisiting location finders, place finders, maps, blah, blah, etc.,
This application leverages Google's Gemini AI, in getting suggestions of places, according to the user's mood !
Whose data is then processed along with the geo location and returned.
#### A Simple Yet Innovative Idea ...
### TECH STACK
- Twilio (Our sponsor)
Handling our messaging service, and delivering instant directions and links to our consumers.
- Python 3.11
Used due to it's Robust and fast natured theme, and optimized perfomance.
- Flask
- Gemini AI
Our AI providing the life to our application, giving the AI'esthetic touch we need, in our place suggestions.
- OpenCage Maps
Improved accuracy, on getting precise locations
- Google Maps
The distance matrix api key, providing with real time distance, and time information between source and the destination.
## The Architecture
## Demo
- GitHub [github.com](https://github.com/jainiresh/locationSuggestor/tree/readme-add)
- Web URL [Live Url](https://locationsuggestor.onrender.com/)
## Short video of the application
{% embed https://youtu.be/Hh8VCJSCJq4 %}
### The Head
### The Protagonist
The content page, that lists down all the releveant places your mood would love to be.
### The cameo
Using our awesome Twilio's api to send directions right down to our phone number :
### The Feel Good
Here comes our directions.
## Twilio and AI
The traditional fetch from API / DB is so boring, and redundant.
How about leveraging our AI, to pickup the scent of our mood, and automatically suggest places around us for the best feel.
Not to mention, our awesome Twilio's SMS integration, allowing a free flow of SMS to the consumers, for instant directions and sending other links.
## Additional Prize Categories
<!-- Does your submission qualify for any additional prize categories (Twilio Times Two, Impactful Innovators, Entertaining Endeavors)? Please list all that apply. -->
Yes, our submission qualifies for
- "Impactful Innovators" and
- "Entertaining Endeavors"
The reason for "Impactful Innovators" being :
A lot of foreigners or ourselves when we visit a new place, or a city end up getting unplanned for the day, most of the time.
Our application, gets just your mood as an input via a web interface, and suggests you the best spots/places, to feel your best.
This is a must use application, for all those unplanned travellers, to explore a lot on every new place they travel to.
The reason for "Entertaining Endeavors" being :
Not only it does cover the spots like, temples, forts, etc.,
But also it can take in your mood to give you good pubs, drink bars, and fun activity malls, which gives you the real fun of new places.
<!-- 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! --> | jainireshj |
1,897,263 | Generative AI: Transforming the Tech Landscape | Introduction Generative AI refers to a subset of artificial intelligence technologies... | 27,673 | 2024-06-22T18:18:21 | https://dev.to/rapidinnovation/generative-ai-transforming-the-tech-landscape-md1 | ## Introduction
Generative AI refers to a subset of artificial intelligence technologies that
can generate new content, from text and images to music and code, based on the
patterns and information it has learned from existing data. This technology
leverages advanced machine learning models, particularly deep learning neural
networks, to understand and replicate complex patterns and data distributions.
## What is Generative AI?
Generative AI can create novel outputs that didn't previously exist,
transforming how machines assist in creative processes and automate tasks
requiring creativity or contextual adaptation. It encompasses fields such as
digital art, automated content generation, personalized communication, and
even drug discovery.
## Core Technologies Behind Generative AI
Generative AI primarily includes machine learning models like Generative
Adversarial Networks (GANs) and Variational Autoencoders (VAEs). GANs consist
of two neural networks—the generator and the discriminator—that compete
against each other to produce realistic outputs. VAEs compress data into a
smaller representation and then reconstruct it to generate new data points.
## Types of Generative AI Models
Generative AI models include:
## How Does Generative AI Work?
Generative AI works by training models on large datasets to understand and
replicate underlying patterns. The process involves data processing, model
training, and output generation, where the AI uses learned parameters to
create new instances of data.
## Benefits of Generative AI
Generative AI offers numerous benefits:
## Challenges in Generative AI
Generative AI faces several challenges, including ethical and societal
concerns, data privacy issues, and technical challenges. Addressing these
requires ongoing research, thoughtful regulation, and public discourse.
## Future of Generative AI
The future of generative AI looks promising, with potential impacts across
various industries. Predictions indicate increasing democratization of AI
tools, improvement in model sophistication, and a growing movement towards
ethical AI.
## Real-World Examples of Generative AI
Generative AI is applied in:
## Why Choose Rapid Innovation for Implementation and Development
Rapid Innovation offers significant advantages in AI and Blockchain
implementation:
## Conclusion
Generative AI is transforming industries by automating creative processes,
enhancing data analysis, and personalizing user experiences. Embracing this
technology is crucial for businesses aiming to maintain a competitive edge in
the rapidly evolving digital landscape.
📣📣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)
[AI Software Development](https://www.rapidinnovation.io/ai-software-
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
* <http://www.rapidinnovation.io/post/what-developers-need-to-know-about-generative-ai>
## Hashtags
#GenerativeAI
#MachineLearning
#DeepLearning
#AIInnovation
#FutureOfAI
| rapidinnovation | |
1,897,262 | water wave text animation effect | Pure CSS Water Wave Text Animation Effect using CSS clip-path | 0 | 2024-06-22T18:18:20 | https://dev.to/najam_mir_122/water-wave-text-animation-effect-2gd2 | codepen | Pure CSS Water Wave Text Animation Effect using CSS clip-path
{% codepen https://codepen.io/alvarotrigo/pen/PoKMyzO %} | najam_mir_122 |
1,897,261 | Why you need hooks and project | Install Vite: Open your terminal or command prompt and run the following command to create a new... | 0 | 2024-06-22T18:18:07 | https://dev.to/geetika_bajpai_a654bfd1e0/why-you-need-hooks-and-project-ii6 | 1. Install Vite:
Open your terminal or command prompt and run the following command to create a new Vite project:
2. Navigate to Your Project Directory:
Change directory to your newly created project directory by using command cd.
3. Install Dependencies:
Once inside the project directory, install the necessary dependencies by running: `npm install`.
4. Run the Development Server:
Start the development server to see your project in action: `npm run dev`.
We will explore hooks by creating a project and understanding the problems we solve.
The addValue function is defined to increment the counter variable. It logs the current counter value to the console and then increments it by 1.
## Understanding problem
<h3>Issues and Improvements</h3>
Like we use one variable to more places if we do these things in classic javascript it create many references like document.getElementById, document.getElementByClassname, change the text inside the button. So, in react to change in UI react provide hooks
1. <u>State Management:</u> The counter should be a stateful variable to ensure that changes are reflected in the UI. This can be achieved using the useState hook.
2. <u>Reactivity:</u> To make the component re-render on counter changes, the counter variable should be managed by React's state.
The useState hook is a function that takes an initial state as an argument and returns an array with two elements: the current state value and a function that allows you to update that value.
• useState Hook: const [counter, setCounter] = useState(0); initializes a state variable counter with an initial value of 0 and provides a function setCounter to update it.
• State Update: setCounter(counter + 1); updates the state, causing the component to re-render and display the updated counter value.
<h3>Here it is another example of useState</h3>
| geetika_bajpai_a654bfd1e0 | |
1,897,260 | Github field day selection answers | Write a short elevator pitch for yourself. * • Your home town, education, technical or personal... | 0 | 2024-06-22T18:18:00 | https://dev.to/bridgesgap/github-field-day-selection-answers-f4d | Write a short elevator pitch for yourself.
*
• Your home town, education, technical or personal interests!
• How have the experiences around you shaped you as a person ?
[The maximum character count is 1200]
Tithi is an artist, designer, and content creator based in Kolkata, India. She has attended professional classes for art and craft, honing her skills in graphic design. Her work has been recognized, & her posters have gained attention on various platforms, even inspiring others to create award-winning pieces. Currently, she is focusing on building a tech community at her college from the scratch & growing other smaller communities. She has served as the design lead for local communities, showcasing her leadership skills and ability to create impactful designs.
She has learnt to communicate effectively, share ideas, collaborate with people, share enthusiasm & experience with others, thus helping herself from being an absolute introvert to someone who is readily available for folks to contact for help & information.
Fun fact- she is also called "The Omnipresent" for being present in almost every tech conference in Kolkata, helping out the organising team in one way or the other.
Describe your community briefly.
*
• What is your community about?
• What role do you play in the community?
• How have the community members benefited by being a part of it? What activities have you undertaken to ensure their active participation?
• Links to websites and past events will be a plus!
[The maximum character count is 2400]
I represent Google Developer Student Clubs from my college. Google Developer Student Clubs are university based community groups for students around the world & students from all undergraduate or graduate programs with an interest in growing as a developer are welcome. Here, they grow their knowledge in a peer-to-peer learning environment and build solutions for local businesses and their community.
I am the founding lead for the GDSC chapter in my college, having laid the foundation in 2023. I regulate and organize sessions, campaigns for students to take part in. Apart from organizational duties, I do design creatives & coached folks as a mentor.
I brought two major campaigns to the club, which familiarised folks with the usage of the google cloud platform. Over 160 people completed it. Apart from that, I have also tried to offer the folks a chance to further explore other communities, programmes & technologies, helping them get exposure & experience from the same. Some links to check out the same:
https://dev.to/bridgesgap/postman-student-leader-a-complete-guide-5ge4
https://dev.to/gdscbbit/30-days-of-google-cloud-a-review-59o
https://dev.to/bridgesgap/gen-ai-study-jams-a-review-35dc
https://www.linkedin.com/posts/unnati-shaw-27498a272_cncf-cnh-kubernetes-activity-7203231976068194304-pNxt?utm_source=share&utm_medium=member_android
https://www.linkedin.com/feed/update/urn:li:activity:7175787985576038400?updateEntityUrn=urn%3Ali%3Afs_feedUpdate%3A%28V2%2Curn%3Ali%3Aactivity%3A7175787985576038400%29
https://www.linkedin.com/feed/update/urn:li:activity:7127659128528809985?updateEntityUrn=urn%3Ali%3Afs_feedUpdate%3A%28V2%2Curn%3Ali%3Aactivity%3A7127659128528809985%29
https://x.com/TithiBose7/status/1780331182015570032?t=LcpDwco3A5kws5WCMwumTw&s=19
How will attending the GitHub Field Day and meeting other student community leaders impact you and your community?
*
• What learnings do you expect to take away from this event?
• Bullet points will be great here!
[The maximum character count is 600]
Github Field day, I believe, has one of the most curated set of participants from the entire country (& beyond, who knows?) which ensures quality networking with leaders & shapers of the future!
I believe each student leader is unique, & we could have a talk on how the community landscape in different regions work, how the leads manage to run their communities, exchange ideas, get feedback, & gain insights on the same.
If there are speakers, would love to listen to & connect with to them, have healthy conversations, leaving my introvert version aside!
Lastly, enjoy the course of the day! | bridgesgap | |
1,884,100 | 10 Expert Performance Tips Every Senior JS React Developer Should Know | Elevate your React development skills with 10 advanced performance tips tailored for senior... | 0 | 2024-06-22T18:17:46 | https://dev.to/afzalimdad9/10-expert-performance-tips-every-senior-js-react-developer-should-know-4hl8 | react, frontend, javascript, webdev | Elevate your React development skills with 10 advanced performance tips tailored for senior JavaScript developers. Learn how to optimize your code and enhance the efficiency of your React applications. Master the techniques that will set you apart in the competitive world of web development.
## 1. Use useMemo for Expensive Calculations
When performing expensive calculations or data transformations, use the `useMemo` hook to memoize the result and prevent unnecessary re-calculations.
```
import React, { useMemo } from 'react';
const MyComponent = ({ data }) => {
const transformedData = useMemo(() => {
// Perform expensive data transformation here
return data.map(item => item * 2);
}, [data]);
return (
<div>
{/* Use transformedData here */}
</div>
);
};
```
## 2. Use useCallback for Memoized Functions
When passing callback functions as props, use the `useCallback` hook to memoize the function and prevent unnecessary re-renders of child components.
```
import React, { useCallback } from 'react';
const ParentComponent = () => {
const handleButtonClick = useCallback(() => {
// Handle button click here
}, []);
return (
<ChildComponent onClick={handleButtonClick} />
);
};
```
## 3. Use React.memo for Performance Optimization
To optimize functional components, use the `React.memo` higher-order component to memoize the component and prevent re-rendering if the props haven't changed.
```
import React from 'react';
const MyComponent = React.memo(({ prop1, prop2 }) => {
// Render component here
});
```
## 4. Use Virtualized Lists for Efficient Rendering
For long lists, use a virtualized list library like `react-window` or `react-virtualized` to only render visible items, thus improving rendering performance.
```
import React from 'react';
import { FixedSizeList } from 'react-window';
const MyListComponent = ({ data }) => {
const renderRow = ({ index, style }) => {
const item = data[index];
return (
<div style={style}>{item}</div>
);
};
return (
<FixedSizeList
height={300}
width={300}
itemSize={50}
itemCount={data.length}
>
{renderRow}
</FixedSizeList>
);
};
```
## 5. Use Code Splitting for Lazy Loading
Split your code into smaller chunks and load them lazily using dynamic imports and React's `lazy` and `Suspense` components. This improves initial load time and only loads necessary code when needed.
```
import React, { lazy, Suspense } from 'react';
const LazyComponent = lazy(() => import('./LazyComponent'));
const App = () => {
return (
<Suspense fallback={<div>Loading...</div>}>
<LazyComponent />
</Suspense>
);
};
```
## 6. Use Memoization for Expensive Calculations
Memoization involves caching the results of expensive function calls and returning the cached result when the same inputs occur again, saving unnecessary computations.
```
const memoizedExpensiveFunction = useMemo(() => {
// Expensive computation here
}, [input]);
```
## 7. Optimize Rendering with React.Fragment
When rendering multiple elements without a container element, use `React.Fragment` or the shorthand syntax `<>...</>` to avoid excess DOM nodes.
```
import React from 'react';
const MyComponent = () => {
return (
<>
<div>Element 1</div>
<div>Element 2</div>
</>
);
};
```
## 8. Use Function Components with Hooks
Use function components with hooks instead of class-based components as they offer simpler and more performant code.
```
import React, { useState } from 'react';
const MyComponent = () => {
const [count, setCount] = useState(0);
const handleIncrement = () => {
setCount(count + 1);
};
return (
<div>
<button onClick={handleIncrement}>Increment</button>
<p>Count: {count}</p>
</div>
);
};
```
## 9. Avoid Inline Function Definitions
Avoid defining functions inline within render methods as they create a new reference on each render, leading to unnecessary re-renders of child components.
```
import React, { useCallback } from 'react';
const ParentComponent = () => {
const handleButtonClick = useCallback(() => {
// Handle button click here
}, []);
return (
<ChildComponent onClick={handleButtonClick} />
);
};
```
## 10. Use `React.PureComponent` or `React.memo` for Performance Optimization
Use `React.PureComponent` or `React.memo` to prevent unnecessary re-rendering of components by performing shallow prop comparisons.
```
import React, { PureComponent } from 'react';
class MyComponent extends PureComponent {
render() {
// Render component here
}
}
export default MyComponent;
```
These performance tips can help improve the efficiency and responsiveness of your ReactJS applications. Utilizing functional architecture, memoization, and code-splitting techniques can greatly enhance the overall performance of your React components.
Don't be shy to clap, consider clap if you find this useful. If you want you can clap multiple times also :P, just try :D
Thank you for reading until the end. Before you go:
Please consider clapping and following the writer! 👏 | afzalimdad9 |
1,897,259 | First Post | Hello there, I hope my first post finds everyone well. As someone who follows the Feynman technique,... | 0 | 2024-06-22T18:17:46 | https://dev.to/skyinhaler/first-post-3335 | linux, beginners | Hello there,
I hope my first post finds everyone well. As someone who follows the Feynman technique, which emphasizes explaining concepts as if you're teaching a child, I decided to share what I'm learning with others. Sharing is a great way to track progress, and I want to document this journey of "grinding" until I reach my goal, and hopefully help everyone else reach theirs too. I can't promise daily posts, but I will post as often as I can. I want to start this journey with a dive into **Linux**, and I plan to discuss each topic in a way that might be different from what you’ve seen elsewhere. I'm also open to people's criticism and corrections—not seeking perfection, but aiming to learn and benefit others as well. | skyinhaler |
1,897,258 | Gen AI Study Jams- a review | This was a new type of study jam introduced by Google Developer Student Clubs in India to upskill... | 0 | 2024-06-22T18:14:19 | https://dev.to/bridgesgap/gen-ai-study-jams-a-review-35dc | This was a new type of study jam introduced by Google Developer Student Clubs in India to upskill students with the usage of AI, making them comfortable with using AI with their projects via GCP.
| bridgesgap | |
1,897,257 | From Idea to Execution: Why You Need to Hire Express Programmers for Your Next Project | Hiring express programmers can bring a multitude of benefits to your business. These professionals... | 0 | 2024-06-22T18:13:16 | https://dev.to/ritesh12/from-idea-to-execution-why-you-need-to-hire-express-programmers-for-your-next-project-33f9 | Hiring express programmers can bring a multitude of benefits to your business. These professionals are skilled in developing and maintaining web applications using the Express.js framework, which is known for its speed and simplicity. By hiring express programmers, you can ensure that your web applications are developed efficiently and effectively, saving time and resources in the long run. Additionally, express programmers are well-versed in JavaScript, making them capable of creating dynamic and interactive web applications that can enhance user experience and engagement. With their expertise, you can expect high-quality and reliable web applications that meet your business needs and objectives. Furthermore, hiring express programmers can also provide you with access to a pool of talent that is dedicated to staying updated with the latest trends and best practices in web development, ensuring that your web applications are always at the forefront of technology.
In addition to their technical skills, express programmers can also bring a fresh perspective to your web development projects. Their experience in working with the Express.js framework allows them to approach challenges and problem-solving in a unique and efficient manner. This can lead to innovative solutions and improved performance for your web applications. Moreover, hiring express programmers can also free up your internal resources, allowing your team to focus on other core business activities. This can lead to increased productivity and efficiency within your organization, as well as the ability to take on more projects and opportunities. Overall, hiring express programmers can provide your business with a competitive edge in the digital landscape, ensuring that your web applications are developed and maintained to the highest standards.
How to Find and Vet Qualified Express Programmers
When looking to hire expressjs programmers, it is important to find and vet qualified professionals who can meet your specific needs and requirements. One of the best ways to find qualified express programmers is through professional networking platforms and online job boards. These platforms allow you to connect with a wide range of talent and review their portfolios and work experience. Additionally, you can also consider reaching out to industry-specific communities and forums to find recommendations for qualified express programmers. Once you have identified potential candidates, it is important to vet their qualifications and skills thoroughly. This can be done through technical interviews, coding tests, and reviewing their past projects and contributions to open-source communities. By thoroughly vetting potential express programmers, you can ensure that they have the necessary skills and experience to meet your business needs.
In addition to technical skills, it is also important to consider the soft skills of potential express programmers. Effective communication, problem-solving abilities, and teamwork are essential qualities for successful collaboration with express programmers. Therefore, it is important to assess these qualities during the vetting process to ensure that the candidates are a good fit for your organization. Furthermore, it is also important to consider the cultural fit of potential express programmers within your organization. This can be done through informal meetings and discussions to gauge their personality and work ethic. By finding and vetting qualified express programmers, you can ensure that you are working with professionals who are capable of delivering high-quality web applications that meet your business objectives.
The Importance of Clear Communication with Express Programmers
Clear communication is essential when working with express programmers to ensure that your web development projects are successful. Effective communication allows you to convey your business objectives, requirements, and expectations clearly, ensuring that the express programmers understand the scope of the project and can deliver accordingly. Additionally, clear communication also allows for effective collaboration between your team and the express programmers, enabling them to work together seamlessly towards a common goal. By maintaining open lines of communication, you can also address any issues or concerns that may arise during the development process, ensuring that they are resolved in a timely manner. Furthermore, clear communication also allows for transparency and accountability, as both parties are aware of their roles and responsibilities within the project.
To facilitate clear communication with express programmers, it is important to establish regular check-ins and meetings to discuss project progress, challenges, and next steps. This allows for real-time feedback and adjustments to be made as needed, ensuring that the project stays on track. Additionally, it is also important to establish clear channels of communication, such as email, messaging platforms, or project management tools, to ensure that all parties are easily accessible when needed. Moreover, it is also important to encourage open dialogue and feedback from both your team and the express programmers, allowing for a collaborative and constructive working environment. By prioritizing clear communication with express programmers, you can ensure that your web development projects are executed smoothly and effectively.
Setting Clear Expectations for Express Programmers
Setting clear expectations for express programmers is crucial for the success of your web development projects. By clearly defining the scope of the project, timelines, deliverables, and quality standards, you can ensure that the express programmers understand what is expected of them and can deliver accordingly. Additionally, setting clear expectations also allows for alignment between your team and the express programmers, ensuring that everyone is working towards a common goal. This can help prevent misunderstandings or miscommunications that may arise during the development process. Furthermore, setting clear expectations also allows for accountability, as both parties are aware of their responsibilities within the project.
To set clear expectations for express programmers, it is important to document the project requirements and objectives in detail. This can include creating a project brief or scope document that outlines the goals, features, and technical specifications of the web application. Additionally, it is also important to establish clear timelines and milestones for the project, allowing both parties to track progress and make adjustments as needed. Moreover, it is also important to define quality standards and performance metrics for the web application, ensuring that it meets your business objectives and user expectations. By setting clear expectations for express programmers, you can ensure that your web development projects are executed efficiently and effectively.
Managing and Collaborating with Express Programmers
Managing and collaborating with express programmers requires effective leadership and teamwork to ensure that your web development projects are successful. As a manager or project lead, it is important to provide clear direction and support for the express programmers throughout the development process. This can include setting priorities, providing resources and tools, and addressing any challenges or roadblocks that may arise. Additionally, it is also important to foster a collaborative working environment by encouraging open communication and feedback between your team and the express programmers. This allows for a seamless exchange of ideas and solutions that can improve the overall quality of the web application.
To effectively manage and collaborate with express programmers, it is important to establish clear roles and responsibilities within the project team. This ensures that everyone understands their contributions towards the project goals and can work together towards a common objective. Additionally, it is also important to provide regular feedback and guidance to the express programmers to ensure that they are aligned with the project requirements and quality standards. Moreover, it is also important to leverage project management tools and methodologies to streamline collaboration and track progress effectively. By managing and collaborating with express programmers effectively, you can ensure that your web development projects are executed efficiently and meet your business objectives.
Ensuring Quality and Efficiency in Express Programming Projects
Ensuring quality and efficiency in express programming projects requires attention to detail and a focus on best practices in web development. By prioritizing code quality, performance optimization, and security measures, you can ensure that your web applications are reliable and scalable. Additionally, it is important to conduct thorough testing and debugging throughout the development process to identify any issues or bugs early on. This allows for timely resolution and ensures that the final product meets your quality standards. Furthermore, it is also important to leverage industry best practices in web development, such as modular design patterns and code reusability, to improve efficiency and maintainability of the web application.
To ensure quality and efficiency in express programming projects, it is important to establish coding standards and guidelines for the express programmers to follow. This ensures consistency in code structure and readability across the project, making it easier for developers to collaborate and maintain the codebase over time. Additionally, it is also important to conduct code reviews regularly to identify any potential issues or areas for improvement within the codebase. Moreover, it is also important to leverage automation tools and continuous integration practices to streamline the development process and ensure that changes are integrated seamlessly into the project. By ensuring quality and efficiency in express programming projects, you can deliver high-quality web applications that meet your business objectives.
Evaluating the Success of Hiring Express Programmers
Evaluating the success of hiring express programmers requires a comprehensive review of their performance and impact on your web development projects. One way to evaluate their success is by assessing their ability to deliver high-quality web applications that meet your business objectives within the agreed-upon timelines. This can be done through performance metrics such as code quality, performance optimization, security measures, and user satisfaction. Additionally, it is also important to consider their ability to collaborate effectively with your team and adapt to changes or challenges that may arise during the development process. By evaluating these factors, you can determine whether hiring express programmers has been successful for your organization.
Another way to evaluate the success of hiring express programmers is by considering their impact on your organization's productivity and efficiency in web development projects. This can include assessing whether they have freed up internal resources or improved the overall quality of your web applications through their expertise in Express.js framework. Additionally, it is also important to consider their ability to stay updated with the latest trends and best practices in web development, ensuring that your web applications are always at the forefront of technology. By evaluating these factors, you can determine whether hiring express programmers has provided a competitive edge for your organization in the digital landscape.
In conclusion, hiring express programmers can bring a multitude of benefits to your organization by providing access to skilled professionals who can develop high-quality web applications using the Express.js framework. By finding qualified candidates who align with your business objectives through effective vetting processes, setting clear expectations for them through open communication channels ensures successful collaboration between teams leading towards efficient execution of projects while maintaining high-quality standards throughout development processes resulting in successful outcomes for organizations hiring them.
In addition, express programmers can also bring fresh perspectives and innovative ideas to the table, contributing to the overall growth and success of your organization. Their expertise in Express.js can help streamline development processes, improve project timelines, and ultimately drive business results. Overall, investing in express programmers can be a strategic decision that yields long-term benefits for your organization's web development needs.
https://nimapinfotech.com/hire-express-js-developers/ | ritesh12 | |
1,897,251 | 30 Days of Google Cloud- a review | 30 days of Google Cloud is a program primarily run by Google Developer Student Clubs as a way to... | 0 | 2024-06-22T17:51:25 | https://dev.to/gdscbbit/30-days-of-google-cloud-a-review-59o | 30 days of Google Cloud is a program primarily run by Google Developer Student Clubs as a way to introduce students into the realm of Cloud Computing via the Google Cloud Platform, commonly referred to as the GCP.
Here, tracks/milestones are given which are to be completed within a given timeframe to be eligible for certain prizes. All the work should be done via the cloudskillsboost platform in order to achieve the milestones, which consists of labs, courses videos, quizzes, etc.
Every year, the syllabus is different, & the program name may also vary, like being called as Cloud Study Jams. Previously, there used to be a lot of seats, but these days, things are pretty limited & a bit harder.
Here, I am sharing my experience as a GDSC Lead organizing Cloud Study Jams for the first time in my college campus.
`Registration process`
Before people could participate join the program, they are required to fill out an interest form to register their keenness.
Note that crucial information is usually taken using this form & one should fill it carefully to avoid complications during the entire campaign. Since these days, seats are pretty limited, would say that filling forms ASAP maximizes chances of getting accepted.
`Approval process`
The data team then cross checks each individual application, filtering out the incorrect & inapplicable ones. Note that the GDSCs do not influence the selection process once the data is sent from the latter. Eligibility criteria varies from program to program, so pay heed to the guidelines before jumping to conclusions.
`Campaign period`
This is the actual time period for carrying out the tasks of the campaign. mails are sent out by the GDSC regional team to the eligible participants, & sometimes, a leaderboard might also be included in the mix to make things more competitive, especially when the number of approved folks for a campaign is more than the number of rewardable slots. Generally help is available from the organizing GDSC, in the forms of specially curated speaker sessions, resource list, offline doubt clearing sessions. Note that it is upto the particular GDSC if they want to conduct a session or mentoring session, as I have seen many unable to do so due to issues/conflicting schedules. Make the most out of this by joining the community groups, asking questions(don't spam anyway), facilitate helping others & yourself in the turn by the means of networking. Alternatively, you are at your free will to join sessions from one GDSC & complete the campaigns from another.
| bridgesgap | |
1,897,256 | Wie ein Newsletter-System dir Zeit sparen kann | Wie ein Newsletter-System das nerviges Anschreiben von einer Vielzahl an Empfänger einfach zu einem... | 0 | 2024-06-22T18:12:13 | https://blog.disane.dev/wie-ein-newsletter-system-die-zeit-sparen-kann/ | arbeitserleichterung, newsletter, erfahrungsbericht, automatisiert | Wie ein Newsletter-System das nerviges Anschreiben von einer Vielzahl an Empfänger einfach zu einem Traum machen kann 🥂
---
Vor Kurzem hatte ich ein kleines bis größeres bauliches Problem bei uns im Haus, weswegen ich einen Sachverständigen suchte. Die IHK hat mir dann eine Liste mit ca. 15-20 Sachverständigen gegeben, die ich alle einzeln anschreiben wollte. Jedoch war es mir zu aufwändig nun immer die gleiche Mail (bis auf die Anrede) manuell in meinem Mailprogramm zu schreiben. Dann kam mir die Idee mit einem Newsletterprogramm, was man dafür sehr gut nutzen kann und auch in Zukunft vermutlich gute Dienste leisten könnte.
## Warum ein Newsletter-System? 🤔
Ein Newsletter-System hat halt den charmanten Vorteil, dass man eine Kampagne aufsetzt und dort eine Mail als Vorlage hinterlegen kann. Zudem können dann gewisse Textpassagen mit Platzhaltern aus den Benutzerdaten eingepflegt und beim Versand automatisch ersetzt werden. Mega!
## Welches System? 👨💻
Es ging nun an die Recherche welches System hierfür brauchbar wäre. Meine Eckpunkte waren:
* Lauffähig in einem Docker-Container (kostenfrei)
* Import von CSV/JSON
* Schöne und einfach zu nutzende Oberfläche
Bei meiner Recherche bin ich recht schnell auf Listmonk gestoßen.
[listmonk - Free and open source self-hosted newsletter, mailing list manager, and transactional mailsSend e-mail campaigns and transactional e-mails. High performance and features packed into one app.](https://listmonk.app/)
## Was kann Listmonk? 🤯
Listmonk ist eine Open-Source-Software zur Verwaltung und Versendung von Newslettern. Entwickelt von Zerodhatech, bietet sie eine Vielzahl an Funktionen, die sowohl für kleine Unternehmen als auch für große Konzerne geeignet sind. Die Software wurde in Go programmiert und verwendet eine PostgreSQL-Datenbank, was sie extrem schnell und effizient macht. Listmonk ist frei verfügbar und kann von jedem genutzt und angepasst werden. Das bedeutet, dass du keine Lizenzgebühren zahlen musst und die Freiheit hast, die Software nach deinen Bedürfnissen zu verändern. Durch die Verwendung von Go und PostgreSQL kann Listmonk Millionen von E-Mails pro Stunde verarbeiten. Egal, ob du eine kleine Liste mit Abonnenten hast oder eine riesige Datenbank verwalten musst, Listmonk schafft das problemlos. Listmonk bietet zahlreiche Anpassungsmöglichkeiten, von der Gestaltung der E-Mails bis hin zur Verwaltung der Abonnentenlisten. Du kannst verschiedene Templates verwenden, A/B-Tests durchführen und detaillierte Analysen deiner Kampagnen erhalten.
## Die Installation 🛠️
Sofern du bereits einen Docker-Host hast, kannst du einfach die nachfolgende Compose-File übernehmen, hier ist schon alles wesentliche integriert. Du musst nur die Kennwörter etc. ändern und Ablageorte der Dateien für dein System anpassen.
```yaml
# NOTE: This docker-compose.yml is meant to be just an example guideline
# on how you can achieve the same. It is not intented to run out of the box
# and you must edit the below configurations to suit your needs.
version: "3.7"
x-app-defaults: &app-defaults
restart: unless-stopped
image: listmonk/listmonk:latest
ports:
- "9000:9000"
environment:
- LISTMONK_db__ssl_mode=disable
- LISTMONK_db__host=db
- LISTMONK_db__port=5432
- LISTMONK_db__user=listmonk
- LISTMONK_db__password=listmonk
- LISTMONK_db__database=listmonk
- LISTMONK_app__admin_username=Dein Uuser
- LISTMONK_app__admin_password=Dein PW
- TZ=Europe/Berlin
x-db-defaults: &db-defaults
image: postgres:13-alpine
ports:
- "9432:5432"
environment:
- POSTGRES_PASSWORD=listmonk
- POSTGRES_USER=listmonk
- POSTGRES_DB=listmonk
- TZ=Europe/Berlin
restart: unless-stopped
healthcheck:
test: ["CMD-SHELL", "pg_isready -U listmonk"]
interval: 10s
timeout: 5s
retries: 6
services:
db:
<<: *db-defaults
container_name: listmonk_db
volumes:
- /mnt/user/appdata/listmonk/db:/var/lib/postgresql/data
app:
<<: *app-defaults
container_name: listmonk_app
#command: [sh, -c, "yes | ./listmonk --install --config config.toml && ./listmonk --config config.toml"]
depends_on:
- db
volumes:
- /mnt/user/appdata/listmonk/config.toml:/listmonk/config.toml
- /mnt/user/appdata/listmonk/uploads:/listmonk/uploads
```
Das war's auch schon mit der Installation. Danach sollte dann Listmonk bereit sein für dich und es sollte über deine IP über den Port `9432`erreichbar sein:
## Konfiguration des Mailversands 📫
In den Einstellungen musst du dann definieren, über welche Mailbox die E-Mails versendet werden. Das geht eigentlich bei jedem Anbieter der SMTP anbietet. Unter den Einstellungen kannst du einfach so viele SMTP-Konten anlegen und darüber dann deine Kampagnen versenden.
## Import von Kontaktdaten 👥
Wichtig war mir, dass ich Kontaktdaten, eine Liste der IHK hatte ich bereits, via CSV oder JSON übernehmen kann. Da die Liste als PDF vorlag, hab ich ChatGPT gebeten, mir daraus eine Liste im erwarteten Format zu erstellen. Das klappte auch erstaunlich gut, so dass ich schnell alle meine Kontakte in Listmonk hatte.
## Mailingliste erstellen 📃
Alle Kontakte habe ich dann zu einer Liste hinzugefügt, die angeschrieben werden sollte. Hier kann man dann auch noch weitere (bestehende Kontakte hinzufügen) und/oder filtern. Aktuell brauche ich alle. Du könntest darüber aber auch z.B. ein Mailing an nur bestimmte Leute aus deiner Umgebung erstellen (wenn diese Daten in Listmonk vorliegen).
## Mailvorlage erstellen ✉️
Ich habe mir für meine privaten Mails eine Vorlage erstellt, die keinerlei CI (corporate identity) besitzt:
Hiermit könntest du aber eine generelle Vorlage erstellen, die der CI deines Unternehmens oder deinem Geschmack entspricht und darüber dann ein einheitliches Aussehgen schaffen. Der Inhalt der Kampagnen wird dann in die Vorlage hineingeschrieben.
Damit ich aus sehe wer die Mail geöffnet hat, habe ich auch einen Tracking-View eingebaut, im Prinzip wie eine Lesebestätigung.
## Kampagne erstellen 🎺
Alles mündet dann in den Kampagnen. Eine Kampagne besitzt immer eine Liste von n-Kontakten, eine Vorlage und einen entsprechenden Inhalt. Mein Mailinhalt sah dann so aus:
Wie du siehst, ist hier die Anrede variabel, das heißt, dass dieser Platzhalter für jede Mail und für jeden Kontakt ersetzt wird. Listmonk bietet noch eine Vielzahl an weiteren Variablen an:
[Templating - listmonk / Documentation](https://listmonk.app/docs/templating/#template-expressions)
Diese Kampagne konnte ich dann an alle Leute aus der Liste versenden und sogar noch Anhänge beifügen und CC/BCC-Empfänger.
Die Relationen zwischen den einzelnen Objekten sehen so aus:
## Fazit ☝️
Wie du siehst, kann dir ein Newsletter-System, wenn es geschickt genutzt wird, auch bei solchen Dingen helfen. Die Installation hat mich ca. 20 Minuten gekostet und ich musste die Mail nur einmal schreiben. Zusammen mit ChatGPT konnte ich die vorliegende PDF-Liste schnell nach CSV konvertieren und hab so eine große Zahl an Mails komplett automatisiert abgearbeitet. Man muss nicht noch mehr Arbeit haben als man sowieso schon hat.
Das schöne an Listmonk ist auch, dass es eine API anbietet. So könnte man darüber auch automatisiert Dinge erledigen lassen. Zusammen mit n8n könnte man so auch seine Abonnenten aus dem Blog darin importieren und darüber dann Mails versenden. Eigentlich ziemlich cool oder?
---
If you like my posts, it would be nice if you follow my [Blog](https://blog.disane.dev) for more tech stuff. | disane |
1,894,436 | Computer Programming: What is Looping? | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. Looping is a... | 0 | 2024-06-22T17:59:01 | https://dev.to/codesmith/computer-programming-what-is-looping-4oda | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
<!-- ## Explainer -->
<!-- Explain a computer science concept in 256 characters or less. -->
Looping is a way to execute a set of instructions multiple times without repeating code. Without it, you’d have to write needlessly longer and harder to maintain programs. Loops enable iterative operations, resulting in brief, readable, and powerful code.
<!-- ## Additional Context -->
<!-- Please share any additional context you think the judges should take into consideration as it relates to your One Byte Explainer. -->
<!-- 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 to your post (if you want). -->
<!-- Thanks for participating! --> | codesmith |
1,894,441 | The Concept of Looping in Computer Programming | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. Looping, in... | 0 | 2024-06-22T17:58:37 | https://dev.to/codesmith/the-concept-of-looping-in-computer-programming-27ic | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
<!-- ## Explainer -->
<!-- Explain a computer science concept in 256 characters or less. -->
Looping, in computer programming, is a way to execute a set of instructions multiple times without repeating code. Without looping, you would have to write needlessly longer and harder to maintain programs. Examples are “for” loops and “while” loops.
<!-- ## Additional Context -->
<!-- Please share any additional context you think the judges should take into consideration as it relates to your One Byte Explainer. -->
<!-- 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 to your post (if you want). -->
<!-- Thanks for participating! --> | codesmith |
1,897,253 | [JS]Bootstrap version converter | Cambiar la versión de Bootstrap con... | 0 | 2024-06-22T17:56:34 | https://dev.to/jkdevarg/jsbootstrap-version-converter-5a1m | javascript, bootstrap, css, beginners | Cambiar la versión de Bootstrap con JavaScript.
Estructura
- conversions
- b3to4.json
- b3to5.json
- b4to5.json
- css
- style.css
- js
- script.js
- index.html
Script para convertir código HTML con bootstrap 3 a una versión actual ej: Bootstrap 3 a Bootstrap 4 o Bootstrap 3 a Bootstrap 5.
Toda la función se realiza en script.js mientras que utiliza los json para obtener las clases y luego reemplazarlas.
Url del proyecto: [https://github.com/JkDevArg/bootstrap-version-converter](https://github.com/JkDevArg/bootstrap-version-converter)
| jkdevarg |
1,423,616 | Benchmarking & diagraming my home network | Just a update on what my home network looks like at the moment | 0 | 2023-04-02T20:33:05 | https://dev.to/gjrdiesel/home-network-speed-diagraming-my-home-network-aip | homelab | ---
title: Benchmarking & diagraming my home network
published: true
description: Just a update on what my home network looks like at the moment
tags: homelab
---
Every once and a while I have to call my ISP and renegotiate my internet speed.
Before this last call, I was at 300/300 Mbps, which I thought was quite fast and ridiculous.
I call or chat online when I start seeing offers for new customers well exceeding the performance or beneath the price I'm paying.
I've learned to expect they will not give you the same price as new customers, as they are introductory offers and only last 1 year or so. But using that as leverage can spark up some pretty good deals.
So I was paying $90 for 300/300, I saw new customers were offered $45 for 1G/1G.
Popped in a chat with my ISP and now I'm at 2G/2G for $90.
Now with 2G/2G, I'm going back and reevaluating my network and seeing if I need to address any issues.
Thus, this network diagram was born. It's still slightly a WIP, I want to better document the actual ISP provided equipment and connections, but I'm going out to see the new D&D movie with any luck, so this will have to do for now.
One thing I've found interesting is my M1 MBP is not performing as well as my desktop that is running in nearly the same configuration. I might need to check cables there. Happy to see the desktop is reaching nearly gig speeds at least.
Now to ponder about upgrading the internal network to support 2.5G (:sad-face:).
I didn't think I'd be here doing this. I thought 1 Gig Fiber was out of reach even but it seems things are changing quickly.
If you haven't reached out to your ISP lately, I'd highly suggest doing so. | gjrdiesel |
1,897,250 | React Interview HTML Table Question | Create an HTML table clicking on a cell of which activates that cell by providing some additional css... | 0 | 2024-06-22T17:50:43 | https://dev.to/alamfatima1999/react-interview-html-table-question-36b3 | Create an HTML table clicking on a cell of which activates that cell by providing some additional css to it.
**Note**: Only one cell can be active at a time.
AppTable.js
```JS
import React, { useEffect, useState } from "react";
// import { useEffect, useState } from "react";
import axios from "axios";
import './ApiTable.css'
const ApiTable = () => {
const [userList, setUserList] = useState([]);
const [selectedCell, setSelectedCell] = useState({row:-1, col:-1});
useEffect(() => {
axios
.get("https://jsonplaceholder.typicode.com/users")
.then((res) => {
console.log(res);
setUserList(res.data);
})
.catch((err) => {
console.log(err);
});
}, []);
const clickCell = (index, column) => {
setSelectedCell({row: index, col: column});
}
return (
<div className="table-container">
<table className="table-style">
<tr>
<th>ID</th>
<th>name</th>
<th>Username</th>
{/* <th>Email</th>
<th>Phone</th>
<th>Website</th> */}
</tr>
{userList.map((user, index) => {
return (
<tr onClick= {(e)=>{console.log(e)}}key={user.id}>
<td className = {(index==selectedCell.row && selectedCell.col==0)?"selected-cell":null} onClick={() => {clickCell(index, 0)}}>{user.id}</td>
<td className = {(index==selectedCell.row && selectedCell.col==1)?"selected-cell":null} onClick={()=>{clickCell(index, 1)}}>{user.name}</td>
<td className = {(index==selectedCell.row && selectedCell.col==2)?"selected-cell":null} onClick={()=>{clickCell(index, 2)}}>{user.username}</td>
{/* <td>{user.email}</td>
<td>{user.phone}</td>
<td>{user.website}</td> */}
</tr>
);
})}
</table>
</div>
);
};
export default ApiTable;
```
AppTable.css
```CSS
/* .table-style{
border: 1px solid black;
} */
.table-container{
display: flex;
justify-content: center;
align-items: center;
}
table, td, th{
border: 2px solid red;
border-collapse: collapse;
align-items: center;
}
.selected-cell{
color: yellow;
}
```
index.js
```JS
import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';
import ApiTable from './ApiTable';
const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
<React.StrictMode>
<ApiTable />
</React.StrictMode>
);
reportWebVitals();
```
| alamfatima1999 | |
1,897,249 | Postman Student Leader-A complete guide | A post by Tithi | 0 | 2024-06-22T17:50:35 | https://dev.to/bridgesgap/postman-student-leader-a-complete-guide-5ge4 | bridgesgap | ||
1,897,248 | The Cloud Testing Tool Market: A Revolutionary Growth Forecast by 2031 | The cloud testing tool market is poised for a significant surge in growth over the next few years,... | 0 | 2024-06-22T17:49:43 | https://dev.to/maxhar/the-cloud-testing-tool-market-a-revolutionary-growth-forecast-by-2031-2dil | webdev, aws | The cloud testing tool market is poised for a significant surge in growth over the next few years, driven by the increasing adoption of cloud-native technologies and microservices architectures. Research Cognizance has published a comprehensive report highlighting the key market players and trends shaping this industry. In this article, we will delve into the report's findings and explore the factors contributing to this revolutionary growth.
## Market Players and Competitive Landscape
The report identifies AWS, Sauce Labs, BrowserStack, and LambdaTest as some of the top companies influencing the cloud testing tool market. These companies have established themselves as leaders in the industry by offering innovative solutions that cater to the evolving needs of software development teams. The competitive landscape is characterized by a mix of established players and newer entrants, all vying for market share.
## Market Segmentation
The report segments the cloud testing tool market into two primary categories: cloud-based and on-premises solutions. The cloud-based segment is expected to dominate the market, driven by the convenience and scalability it offers. Additionally, the market is segmented by application, with SMEs and large enterprises being the primary users of these tools.
## Key Trends and Opportunities
Several key trends are driving the growth of the cloud testing tool market. One of the most significant is the increasing adoption of cloud-native technologies and microservices architectures. These architectures require more granular, component-level testing capabilities, which cloud testing tools are well-positioned to provide.
Another trend is the growing emphasis on security testing in the cloud. As organizations move more of their data and applications to the cloud, they need to ensure that these systems are secure and protected from potential threats. Cloud testing tools are adapting to meet this need by offering advanced security testing solutions.
The proliferation of edge computing and 5G networks also presents opportunities for cloud testing tools. These emerging technologies require new types of performance and latency testing, which cloud testing tools are equipped to handle.
## Future Outlook
The report forecasts that the cloud testing tool market will experience significant growth, with a compound annual growth rate (CAGR) of 15% from 2023 to 2030. This growth will be driven by the increasing adoption of cloud technologies, the need for more granular testing capabilities, and the growing emphasis on security and performance testing.
## Conclusion
The cloud testing tool market is poised for revolutionary growth over the next few years, driven by the increasing adoption of cloud-native technologies and microservices architectures. The market is characterized by a competitive landscape with established players and newer entrants vying for market share. Key trends and opportunities include the growing emphasis on security testing, the need for more granular testing capabilities, and the proliferation of edge computing and 5G networks. As the market continues to evolve, it is essential for companies to stay ahead of the curve by adopting innovative solutions that cater to the evolving needs of software development teams.
Citations:
[https://groups.google.com/g/community-aws/c/Hv26qybyHRU](https://groups.google.com/g/community-aws/c/Hv26qybyHRU)
[https://groups.google.com/g/community-aws/c/kMs9CYZw6Mo](https://groups.google.com/g/community-aws/c/kMs9CYZw6Mo)
[https://groups.google.com/g/community-aws/c/TSJDPM62t80](https://groups.google.com/g/community-aws/c/TSJDPM62t80)
[https://sites.google.com/view/c0mmunity-aws](https://sites.google.com/view/c0mmunity-aws)
[https://community-aws.blogspot.com/2024/06/noventiq-partners-with-aws-to.html
](https://community-aws.blogspot.com/2024/06/noventiq-partners-with-aws-to.html) | maxhar |
1,897,244 | Roadmap for iOS Development in 2024. | In recent years, we have witnessed a rapid evolution in the iOS development ecosystem. With each new... | 0 | 2024-06-22T17:41:42 | https://dev.to/codebymattz/roadmap-for-ios-development-in-2024-4bel | ios, swift, mobile, apple | In recent years, we have witnessed a rapid evolution in the iOS development ecosystem. With each new version of iOS, new technologies, tools, and recommended practices emerge, transforming the way apps are conceived, developed, and distributed. As we enter 2024, the world of iOS development continues to expand, offering opportunities for those who wish to dive into this realm.
In this article, we will explore a roadmap to become an iOS developer in 2024. From essential fundamentals to advanced technologies. Whether you are an aspiring developer looking to start your journey or an experienced professional seeking to stay updated, this roadmap is designed to guide you towards success in iOS development.
## Foundations:
The Swift Programming Language: Swift is the primary language for iOS development. It is essential to have a solid grasp of Swift syntax, data types, optionals, and object-oriented programming concepts.
Understanding Xcode and Interface Builder: Xcode is the official integrated development environment (IDE) for iOS development. Understanding how Xcode works will greatly optimize your time if you are familiar with the environment.
## Screen Building:
**UIKit Framework**: Mastering UIKit is essential for building iOS user interfaces. This includes understanding various available components such as view controllers and navigation controllers, as well as designing responsive and visually appealing layouts.
Auto Layout and Responsive Design: Understanding auto-layout is crucial to ensure that interfaces adapt to different screen sizes and orientations, providing a consistent experience to users.
**SwiftUI**: While UIKit is still widely used, SwiftUI is emerging as a modern and powerful alternative for building user interfaces. Despite its growing adoption, understanding the basics of SwiftUI can be advantageous to keep up with future iOS development trends.
**Storyboard**: Both the use of storyboards and programmatic interfaces have their advantages and disadvantages. It is important to be comfortable with both methods to ensure flexibility in interface creation according to project needs.
## **Architecture and Data Persistence:**
**iOS App Architecture**: MVC, MVVM, VIPER: Choosing the right architecture is crucial to ensure the scalability and maintainability of an iOS application. Developers should be familiar with models such as MVC, MVVM, and VIPER, understanding the advantages and disadvantages of each approach.
**Data Persistence with Core Data**: To store data locally in iOS applications, knowledge of Core Data is essential. This framework offers an efficient way to persist and retrieve data, allowing applications to provide a consistent experience to users, even offline.
## Service Integration:
**Networking with URLSession and Alamofire**: Integrating web services into iOS applications requires skills in making efficient network requests. Developers should be comfortable with using native URLSession or popular libraries like Alamofire to ensure effective communication with servers.
**User Authentication and Authorization**: Implementing secure authentication is essential to protect user data. Developers should understand different authentication methods, such as OAuth and Apple Sign-In, ensuring a secure and convenient login experience for users.
## **Testing: Ensuring Code Quality**
**Unit Testing and Integration Testing**: Unit tests are essential to ensure that each component of the application functions as expected, isolating and testing individual parts of the code. Developers should write comprehensive tests to verify the behavior of classes, methods, and functions. Additionally, integration tests should be conducted to ensure that different components of the application work correctly together.
**UI Testing**: UI tests ensure that the application’s user interface functions correctly and provides a consistent experience to users. Tools like XCTest and UI Testing Framework help developers automate UI tests, simulating user interactions and verifying interface behavior in different scenarios.
**Performance and Stress Testing**: In addition to functional tests, developers should also conduct performance and stress tests to ensure that the application is responsive and stable, even under heavy load or adverse conditions. This involves testing the application’s responsiveness, resource consumption, and loading time on different devices and network conditions.
**Accessibility Testing**: Ensuring that the application is accessible to all users, including those with visual, auditory, or motor impairments, is essential. Developers should conduct accessibility tests to verify that the application meets Apple’s accessibility standards and provides an inclusive experience for all users.
**Continuous Testing and Continuous Integration**: Continuous integration and automated testing should be incorporated into the development process to ensure that code is regularly tested and integrated into the main repository seamlessly. This helps identify and fix issues proactively, ensuring continuous quality of the application throughout the development cycle.
## **Monetization and Distribution:**
**Push Notifications and Background Processing**: Implementing push notifications and handling background tasks are essential features to keep users engaged and informed, even when the application is not actively in use.
**In-App Purchases and Monetization Strategies**: For developers focusing on monetization strategies, understanding in-app purchases and integrating payment systems is crucial. It is important to follow Apple’s guidelines and provide a transparent and secure purchasing experience for users.
## App Store Submission and Distribution Best Practices:
Navigating the App Store submission process requires a good understanding of Apple’s guidelines and app review requirements. Developers should follow best practices for app distribution to ensure that their applications are approved and successfully distributed to users. | codebymattz |
1,897,243 | Getting Started with React.js: A Beginner's Guide | Introduction Introduce what React.js is, its popularity, and why beginners should learn it. What... | 0 | 2024-06-22T17:40:45 | https://dev.to/muhammedshamal/getting-started-with-reactjs-a-beginners-guide-34ha | react, javascript, beginners, programming | **Introduction**
Introduce what React.js is, its popularity, and why beginners should learn it.
1. What is React.js?
- Definition: Explain React.js as a JavaScript library for building user
interfaces, primarily for single-page applications.
- Beautifull touch by facebook (now our meta);
2. Why Learn React.js?
- Popularity and Demand: Mention its widespread use in the industry.
- Performance: Touch on its efficient rendering with the virtual DOM.
Friends 🍟 we can stope theory && startup with React JS [](https://react.dev/)
3. Setting Up Your Environment
> Make sure installed Node js in your system
```
npx create-react-app my-first-react-app
cd my-first-react-app
npm start
```
4. Start By our Favor Hello World;
> You can start editing from App.js file (sub main of a main file which is Index.js);
```
// src/App.js
import React from 'react';
function App() {
return (
<div className="App">
<h1>Hello, World!</h1>
</div>
);
}
export default App;
```
Happy Coding;
| muhammedshamal |
1,422,841 | Google Chrome User Guide for Mobile | Table of Contents An introduction to Google and Google Chrome What is Google... | 0 | 2023-04-01T17:47:31 | https://dev.to/eros_smom/google-chrome-user-guide-for-mobile-ek1 | webdev, browser, google, mobile |
##**Table of Contents**
-
An introduction to Google and Google Chrome
-
What is Google Chrome?
-
Why Chrome?
-
Popular features of Google Chrome
-
How to install Google Chrome on Mobile
-
How to use Google Chrome
-
Problems encountered using Google Chrome
-
Popular alternatives to Google Chrome
##**Introduction**
Google is a technology giant. It is an internationalcompany focused on computer software, consumer gadgets and search engine technology.
It has a variety of popular products used on android operating systems, such as Google Play, Google Music, Gmail, and so on.
Google Chrome was created out of an open-source project called [Chromium] (https://www.chromium.org/chromium-projects/) which was developed by the company. It was released as an official product on December 11th, 2008.
This is a simple guide to Google Chrome and how to install it on your mobile phone. It explores the meaning of Google Chrome, some of its features, installation and a quick guide on how to use it.
##**What is Google Chrome?**
Chrome is a free web browser used to access Web pages on the Internet. It runs Web-based applications (applications that can be only accessed over a network connection, instead of existing in your device's storage).
It can be accessed on different devices like a personal computer, a tablet or a mobile phone. This is why it is referred to as a [cross-platform browser](https://www.techopedia.com/definition/5346/cross-browser#:~:text=Cross%2Dbrowser%20refers%20to%20the,that%20provide%20its%20required%20features.) .
It was released initially on Microsoft Windows and presently has models for other operating systems—ChromeOS, macOS, Linux, IOS and Android. Google Chrome is now the default browser for all android devices.
##**Why Chrome?**
There are many Web browsers available for download on the Internet. Google Chrome, however, had the [highest global market share](https://www.oberlo.in/statistics/browser-market-share#:~:text=As%20of%20November%202022%2C%20Google's,Chrome%20to%20browse%20the%20internet.) in November 2022. Here's why Google Chrome should be your top choice:
-
It can [sync](https://www.google.com/amp/s/www.hellotech.com/guide/for/how-to-sync-chrome/amp) your history, open tabs and other settings on your mobile device to your other devices.
-
The browser saves what you search. Therefore, it can automatically submit requests without you having to input fully something you had searched previously.
-
Through Chrome, you can use other workspace tools created by Google. Tools like Gmail and Google Docs.
-
The unique cross-platform feature allows you to use it on multiple devices.
##**Popular Features of Chrome**
-
**The Omnibox**: Chrome combines the address bar for URLs (uniform resource locator) with the search bar, giving you more space and more functionality. You can highlight a text on a web page and search directly. The Omnibox also allows you to see your recent search history when you tap the search bar.
-
**Syncing across devices**: As discussed in the previous header, Chrome allows you to access your passwords, history and other data on your various devices through syncing. You only have to turn on sync on your chrome browser.
-
**Incognito mode**: Incognito mode allows you to browse without leaving a trace. Chrome will not save any of your browsing data.
-
**Minimalist Interface**: Chrome's interface is light, with few buttons and fewer tools that take up less space, allowing you to view content. It has inspired the UI of many other web browsers.
##**How to Install Google Chrome on Your Mobile Phone**
The Chrome application is free on all devices, including mobile. Follow these steps to install it:
1. Tap [Chrome] (https://www.google.com/chrome/).
2. Tap '**Download Chrome**'.
3. Tap **Install**
4. Tap **Accept**.
##**How to Use Google Chrome**
1.Tap the search/URL bar.
2.Type in what you want to search and send. Using the Appwrite website as an instance:
3.Tap on the Appwrite website shown in the results.
4.Wait for the web page to load.
##**Problems encountered using Google Chrome**
-
Chrome does not offer many customization options for mobile, unlike the PC version where you can download themes from the Chrome web store.
-
It is considered a lightweight app but it takes up a lot of memory which affects other running applications on your device.
-
Chrome keeps your data secure from other websites, but still has access to most of it which is a security risk.
##**Popular Alternatives of Google Chrome**
-
[Mozilla Firefox](https://www.mozilla.org/en-US/firefox/browsers/mobile/android/) :
Mozilla Firefox is an open-source web browser developed by Mozilla Foundation and Mozilla Corporation.
Firefox is a good alternative, as whatever chrome can do, it can do as well. It has an inbuilt tracker that protects you and your information from other websites. It also offers better battery life management, as it does not slow down your device if you leave multiple tabs open.
-
[Brave](https://brave.com/download/) :
It is an open-source browser that allows users to access the Internet and Web applications. It is one of the newer entry browsers as it made its first release in January, 2016. It was built using Chromium and by Brandon Eich, the creator of Java script and former co-founder of Mozilla.
A unique feature of Brave is that it has a special system of digital advertisement, which uses BAT (Basic Attention Token). BAT is used as an exchange token between users of the platform.
Advertisers buy BAT in order to showcase their ads on the browser and users who view their ads are paid a percentage of the tokens. BAT can be sold on crypto exchange for cash.
-
[Opera](https://www.opera.com/browsers/opera):
Opera is a multi-platform web browser developed by Opera company and released on 10 April, 1995. It has its own VPN (virtual private network) that allows you to browse securely. It also has a turbo feature that reduces the size of web pages and allows for faster loading speed in cases of slow Internet connection.
##**Conclusion**
Google Chrome has many great features,its ability to sync across multiple devices being my best feature, and the browser is continually updated with current technology trends. It's good to know the features of the browser you are using, as it can maximise your productivity.
If Google Chrome is not what you're looking for, the alternatives are good enough to try and their download links are shown in the previous header.
| eros_smom |
1,897,242 | Dr. Anahita Gupta: The Premier Pediatric Dentist in Janakpuri | When it comes to your child's dental health, finding a trusted and skilled paediatric dentist is... | 0 | 2024-06-22T17:39:20 | https://dev.to/content_7179c651c3b9f2f6d/dr-anahita-gupta-the-premier-pediatric-dentist-in-janakpuri-40je | When it comes to your child's dental health, finding a trusted and skilled paediatric dentist is crucial. In Janakpuri, one name stands out above the rest—Dr. Anahita Gupta. Renowned for her gentle approach and exceptional expertise, Dr. Anahita Gupta has become a favourite among kids and parents alike. This article explores why Dr. Anahita Gupta is the go-to paediatric dentist in Janakpuri and highlights the reasons why you should consider visiting her clinic for your child’s dental care needs.https://www.dantvilla.com/pediatric-dentist-in-janakpuri | content_7179c651c3b9f2f6d | |
1,897,241 | Is Your Child’s Smile in Safe Hands? Best Pediatric dentist in Pune - Hadapsar | When it comes to our children's health, every parent wants the best. But have you ever wondered if... | 0 | 2024-06-22T17:37:49 | https://dev.to/content_7179c651c3b9f2f6d/is-your-childs-smile-in-safe-hands-best-pediatric-dentist-in-pune-hadapsar-5fpp | When it comes to our children's health, every parent wants the best. But have you ever wondered if your child’s dental care is in the best hands? Meet Dr. Pranil Survashe, Pune's leading pediatric dentist, whose expertise and child-friendly approach have made him a favourite among both kids and parents alike.
Why Choose Dr. Pranil Survashe for Your Child's Dental Care?https://www.kidsdentistpune.in/pediatric-dentist-in-hadapsar | content_7179c651c3b9f2f6d | |
1,897,164 | Elanat CMS 2.2 Released - Under .NET Core | Elanat CMS is one of the best systems on the web. There is also a built-in CMS in Elanat core. Elanat... | 0 | 2024-06-22T17:35:43 | https://elanat.net/content/97/Elanat%20version%202.2.0.0%20is%20released.html | news, dotnet, webdev, csharp | [Elanat CMS](https://github.com/elanatframework/Elanat) is one of the best systems on the web. There is also a built-in CMS in Elanat core. Elanat uses an [CodeBehind](https://github.com/elanatframework/Code_behind) infrastructure MVC architecture that is not related to Microsoft ASP.NET Core. This system is very powerful and very large and it benefits from a very modern structure that allows you to create several new add-ons for Elanat CMS every day. The wonderful structure of Elanat is in a way that it interacts with 8 types of add-ons, all of which are components, and the component itself is also a component. In the admin section, all component lists and other add-ons are displayed by the plugin add-on.
{% embed https://github.com/elanatframework/Elanat %}
Elanat is a large CMS-Framework that is open source and free and belongs to the [Elanat team](https://elanat.net).
## Version 2.2.0.0 of Elanat CMS is released
To install Elanat, you need to go to `example.com/install/` url.
`example.com` is an example of your website address or localhost.
You can refer to the Elanat documentation page by referring to the link below.
https://elanat.net/page_content/documentation
## Problems that were solved:
- The problem of not translating the list of categories to add content was solved
- The problem of displaying pdf in full screen in file viewer was solved
- The problem of updating the content date after editing was solved
- The problem of link targets in the link component was solved
- The problem of not displaying cache values for role types in the option component was solved
- The problem of not displaying the site section when the language is not active was solved
- Solving the problem of the fetch component
- Solving the problem of admin global location support
- Solving the problem of increasing the number of attachment downloads
- Solve minor problems in calander
- Solving the problem of query string not working in static files
- Solving the problem of open requests remaining open (exceed max pool size) in connection with the database
- And a series of minor changes and improvements
## Features that were added:
- Added the possibility of adding an aspx file to the page component or plugin component
- Support bmp and webp extensions for avatar image
- webp extension support in file viewer
- Support for date and color inputs and... for the `el_AjaxPostBack` method
- Improving default wyswig fonts and making them bigger
- Accessing contents outside the `wwwroot` directory in the file manager component
- Displaying errors in the error extra helper in a sorted form and improving their naming
- Adding the possibility of replacing value in before load page reference
- Add multipart to the form in the add content component to support long content
- Added possibility to recompile CodeBehind Framework in refresh component
- Improved design in the comments section of the site
## Other changes:
- Updating CodeBehind Framework to version 2.7.1
- Updating SqlClient to version 4.8.6
- Updating SixLabors libraries to the latest versions
The link below shows the current issues of the current version.
https://elanat.net/category/current_errors/
We will solve these problems in future versions. If you are using the current version, if a new update is provided, you can update to the new version through the about component in admin panel.
**Download Elanat CMS 2.2**
To download Elanat content management system version 2.2, refer to the following link:
[https://elanat.net/content/97/Elanat version 2.2.0.0 is released.html](https://elanat.net/content/97/Elanat%20version%202.2.0.0%20is%20released.html)
**System Requirements**
Software:
Windows Server 2019,2022 or higher (Windows 10,11 or higher), Linux, Unix, Mac OS related .NET Core
Dot Net Core 7.0
IIS 10 or higher, any web server that support .NET Core
Sql Server 2014,2016,2017,2019 or higher
Hardware:
Minimum:
CPU : All 64 bit CPU hardware, provided that the operating system works smoothly after installing the necessary software
Memory: HDD (Elanat run in different drive from Windows drive)
Ram : 2 GB (256MB for Elanat)
Normal:
CPU : Intel Core to due E5700 or AMD Athlon II x2 64 or equivalent
Memory: HDD (Elanat run in HDD And Windows run in SSD)
Ram : 3 GB (512MB for Elanat)
Recommended:
CPU : Intel Pentium G3250 or AMD A6-7480 or equivalent
Memory : SSD SATA
Ram : 4 GB (1GB for Elanat)
Nice performance:
CPU : Intel Core i5-3470 or AMD Athlon 3000G or equivalent
Memory: SSD PCIe
Ram : 6 GB (1.5GB for Elanat)
* The minimum system required for OS and the necessary software must be included, otherwise sufficient resources will not be available to the operating system and it will provide an unfavorable experience.
### Related links
Elanat CMS on GitHub:
https://github.com/elanatframework/Elanat
Elanat CMS website:
https://elanat.net
CodeBehind on GitHub:
https://github.com/elanatframework/Code_behind
CodeBehind in NuGet:
https://www.nuget.org/packages/CodeBehind/
CodeBehind page:
https://elanat.net/page_content/code_behind | elanatframework |
1,897,240 | Entity Framework e SQL Server | Entity Framework O EF é um ORM (Object-Relational Mapping). Foi desenvolvido pela Microsoft. Ele... | 0 | 2024-06-22T17:33:42 | https://dev.to/ebagabe/entity-framework-e-sql-server-4eif | sqlserver, ef, csharp, dotnet | Entity Framework
O EF é um ORM (Object-Relational Mapping). Foi desenvolvido pela Microsoft. Ele permite que os desenvolvedores trabalhem com dados relacionais usando objetos .NET, eliminando a necessidade de grande parte do código SQL de baixo nivel que seria necessário de outra forma.
Modelos de Dados: O EF permite criar um modelo de dados a partir de um banco de dados existente (Database First), criar um banco de dados a partir de um modelo de dados (Model First) ou definir o modelo de dados por meio de classes de código (Codigo First)
Consulta de dados: Com EF, é possivel consultar dados usando LINQ (Language Integrated Query), que permite escrever consultas usando a sintaxe de linguagem de programação .NET, gerando uma integração mais fluida e intuitiva
Trabalhando com Objetos: Permite que os desenvolvedores trabalhem com dados como objetos de domínio, usando as mesmas técnicas e padrões usados em outros aspectos do desenvolvimento de software orientado a objetos.
Migrações: O EF oferece suporte a migrações de banco de dados, permitindo que os desenvolvedores atualizem a estrutura do banco de dados de forma incremental, sincronizando as mudanças no modelo de dados com o banco de dados físico.
Lazy Loading e Eager Loading: Suporta lazy loading, onde os dados relacionados são carregados sob demanda, e eager loading, onde os dados relacionados são carregados antecipadamente, oferecendo flexibilidade na maneira como os dados são recuperados.
Como instalar para SQL Server (Visual Studio)
No Visual Studio basta seguir: Ferramentas -> Gerenciador de Pacotes do Nugget -> Gerenciar Pacotes do Nugget para Solução:
Na aba de Procurar busca por Entity Framework e selecione Microsoft.EntityFrameworkCore.SqlServer e instale no seu projeto.
Para criar um contexto (Conexao com banco de dados), você deve utilizar o nome da sua aplicação + Context: NomeDaAplicacaoContext.cs
```cs
using Microsoft.EntityFrameworkCore;
public class NomeDaAplicacaoContext : DbContext
{
private string connectionString = "Server=<host>,<port>;Database=<DataBaseName>;User Id=<NomeDeUser>;Password=<Senha>;Encrypt=False;";
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
optionsBuilder.UseSqlServer(connectionString);
}
}
``` | ebagabe |
1,897,158 | javascript exeuction context | javascript execution context That is, execution context in JavaScript The first means an environment... | 0 | 2024-06-22T16:23:21 | https://dev.to/mhmd-salah/javascript-exeuction-context-12le | javascript, context, webdev, interview | javascript execution context
That is, execution context in JavaScript
The first means an environment in which the code is executed, and in order to imagine it, we put in our minds that it is a large container that contains something that we can use, for example, variables.
Inside the large container, we may have small containers. Each container, of course, contains the code that will be executed, and with the code there are also the needs that the code may need in order to execute, as well as the variables.
There is something that manages this
This engine provides JavaScript, which varies from browser to browser
When the JavaScript engine receives the code, it downloads it and starts creating a code tree
It starts to work automatically on the large container that we talked about, and it contains every thing in the code and every thing that the code can need.
If you tried to debug the browser and it got a breakpoint
The debug will of course start from breakpoint and will remain, for example, function
While you are monitoring the stack we talked about, you will find that put the global execution context in the stack
Then creates something called the Function Execution Context for the function, which is a breakpoint.
This is the small container we talked about
But apart from debug, every invoke function is executed by an execution context
This means that every caller on a function, this function creates an execution context in which the code for the function and anything needed in the function.
There is another execution context called eval function execution context, and this is executed when the engine finds the breakpoint called eval()
Where do these context exeuctions go to be implemented?
When the engine finds a function, it creates the execution context for this function
Then he puts it in the stack to be executed
Of course, the global execution context is created automatically and placed in the stack first
This is a simplified explanation of the execution context
 | mhmd-salah |
1,897,238 | Pediatric Dentist in Kharadi | Pediatric Dentist in Kharadi: Your Child's Smile is Our Priority Finding the right pediatric dentist... | 0 | 2024-06-22T17:33:10 | https://dev.to/content_7179c651c3b9f2f6d/pediatric-dentist-in-kharadi-2b9h | Pediatric Dentist in Kharadi: Your Child's Smile is Our Priority
Finding the right pediatric dentist is crucial for ensuring your child's dental health. For residents of Kharadi, a thriving suburb in Pune, this task is made easier with several qualified pediatric dentists available to cater to the specific needs of children. A pediatric dentist in Kharadi specialises in providing dental care for infants, children, and adolescents, ensuring that every child
https://www.kidsdentistpune.in/pediatric-dentist-in-kharadi | content_7179c651c3b9f2f6d | |
1,897,239 | The Power of Schema Markup: Enhancing SEO and Visibility | Introduction Schema markup is an underutilized but powerful tool in the world of SEO. By... | 0 | 2024-06-22T17:33:10 | https://dev.to/gohil1401/the-power-of-schema-markup-enhancing-seo-and-visibility-2p9j | webdev, beginners, tutorial, seo | ## Introduction
Schema markup is an underutilized but powerful tool in the world of SEO. By embedding specific types of microdata into web pages, Schema markup helps search engines like Google understand and display content more effectively. Despite its immense potential, only about 10 million web pages currently use Schema, presenting a significant opportunity for those who do.
## What is Schema Markup?
Schema markup, also known as Schema.org, is a collaborative vocabulary of microdata that helps search engines better comprehend the content of web pages. This structured data clarifies the context of various elements like people, places, and things, enabling search engines to deliver richer and more relevant search results.
## Benefits of Schema Markup for SEO
The primary advantage of Schema markup is its ability to generate rich results in search engine results pages (SERPs). These enhanced listings can significantly increase visibility and click-through rates (CTR). For instance, rich results for the keyword "target" can include various enhanced elements that standard results lack.
**Higher Click-Through Rates**
Rich results boast an average CTR of 58%, compared to 41% for non-rich results. Some types can even achieve CTRs as high as 87%, providing a significant boost to traffic.
**Improved Targeting**
Rich results can more effectively attract users looking to book events, purchase products, or make reservations, enhancing conversion rates.
**Enhanced Brand Awareness**
Prominent placements in search results can improve brand recognition and credibility, helping your business stand out.
**Call-to-Action (CTA) Opportunities**
Certain rich results come with CTAs like "Call" or "Get Now," driving direct actions from users and potentially increasing conversions.
## Types of Schema markups and when to use them
About one-third of Google’s search results include rich results. Rich results not only look more enticing in the SERPs, they more quickly provide users with the exact information they’re looking for.
For example, a searcher that types “indoor garden,” into the search bar is likely looking for a product that will allow them to garden indoors.
Example product rich results for “indoor garden” keyword
However, a searcher that types “how to garden” is looking for step-by-step information. Naturally, Google populates that second set of search results with the “How-to” rich results.
Because Google loves making search as simple and easy for the user as possible, it’s likely Google will continue to add different types of rich results to match the various types of searches people conduct on the internet.
Google now has over 30 different types of rich results. Here are some of the most common that you’ve likely seen populate in your Google searches:
• Article
• Breadcrumb
• Event
• FAQ
• How-to
• JobPosting
• Logo
• Product
• Q&A
• Review Snippet
• Video
With products, jobs, and events schemas, and, as of earlier this year, education sites, Google doesn’t appear to be slowing down with rich results anytime soon.
That means if your web pages are not appearing in rich results yet, you’re missing out on tons of opportunities to stand out against your competition.
But no business needs to add every schema type to their website. Your specific industry and the type of content on your website will influence what schema markups will be most beneficial for your brand.
## Schema markup examples: 6 powerful schema types for small businesses
Across the board, there are some essential schema types that pretty much every small to midsize business should add to improve their SEO performance, brand visibility, and conversion rates.
If you have content on your web page that fits with one of the below schema types, your brand could likely benefit from adding the corresponding schema markup to the page.
## 1. Organization schema markup
**Improve brand identity and awareness**
The organization schema combines essential information about your business or organization into a knowledge panel that appears in the right side of the search results.
This knowledge panel will show up for search queries that include your brand name.
Here are some specific benefits from adding the organization schema type to your web pages:
• **Brand recognition:** Because the organization schema consolidates key information about your brand like your name, logo, founder, location, and services, it can help improve brand awareness overall.
• **Social media following:** By combining links to your social media profiles within the knowledge panel, you can generate more links to your social media pages as well as more followers and engagements
• **Reputation management:** For enterprise brands with a lot of brand recognition and therefore lots of other people on the internet publishing content with their brand name, schema can help with reputation management—by helping to direct users to the information you want them to focus on and understand about your business.
## 2. Local business Schema markup
**Get more appointments and bookings**
Google knows when a user is searching for a local offering and will rank local businesses at the top of the results accordingly.
Because the majority of local searches happen on mobile devices, it’s important to help improve your appearances in Google Map Pack.
The local business schema makes it easy for Google to find and display key information about your business like hours of operation, address, phone numbers, as well as display your reviews.
Within the local business schema markup, you can add an action schema with your result, like “Book an appointment,” or “Make a reservation.”
Some of the information displayed in rich results for local businesses is pulled from your Google My Business listing, so make sure your business has properly set up and claimed your listing.
Then, I recommended adding the schema markup to your home page, about page, and contact page.
## 3. Breadcrumbs Schema markup
**Help users (and search engines) understand your website architecture**
The breadcrumbs schema helps search engines know how the web pages on your site interrelate. If you have a lot of content on your site, the breadcrumbs schema is a must-have.
Although the appearance of a SERP result doesn’t drastically change due to breadcrumbs, it helps users and search engines understand how your content is organized.
It can help reduce the number of times that users bounce back to the search results, but instead encourage them to navigate through more pages of your website.
## 4. Sitelink Schema markup
**Give searchers more options and take up more real estate**
When it comes to making an impact in the SERPs, sitelinks can help you provide more options to searchers and take up more space.
Some of the key benefits of the sitelinks schema include:
• Give users more options that are relevant to their query
• Direct users to your highest-converting pages
• Make your SERP result more desirable and clickable than others
## 5. Product Schema markup
Let shoppers see key information about your products
Ecommerce companies will significantly benefit by adding the product schema to their product pages.
Product schema shows search engine users key information about your product in a carousel at the top of the SERPs.
Information like price, reviews, or special promotions will also appear alongside the image of your product in your rich result.
The product schema puts your product at the front and center of the user’s experience so they don’t have to navigate through category pages or your ecommerce site’s search bar.
For your competitors who are not using the products schema, you will also easily outrank them by appearing in the carousel at the top of the page.
## 6. Review Schema markup
**Let searchers know you have happy customers**
The review schema is arguably one that every business should be using, regardless of their industry.
That’s because reviews are such a key part of most users’ purchasing decisions. Almost 90% of buyers look to reviews before purchasing a product. So if you have good reviews, there’s no reason not to display them.
Review snippets will display those yellow stars alongside how many reviews your product, local business, or software product has received.
Seeing directly in the SERP results that your business, product, or service has lots of 4 and 5 star reviews makes your result more desirable in the eyes of users who trust ratings and reviews when choosing products or services.
## How to add Schema to your web pages
Because adding schema markup means venturing into the backend of their websites, many digital marketers hesitate to add schema.
Although it may be best for beginners to be guided by the help of a skilled web developer, anyone can add schema markup to their web pages using schema tools.
## Choose a Schema markup format
There are three different schema markup formats. These formats determine which properties are required, optional, or recommended in the schema markup.
No schema format is better than another, but you must know and understand them to ensure your schema is properly validated and can appear in rich results.
• **JSON-LD:** This format is considered the easiest to implement for beginners, as the annotation type can simply be copied and pasted into the heading of the web page.
• **RDFa:** Short for Resource Descriptive Framework in Attributes, you can add this code to any HTML, XHTML, and XML-based document
• **Microdata:** Microdata has separate attributes than RDFa, but the implementation is similar.
If all this code talk makes you nervous, don’t worry. You can implement a schema to your web page using tools that generate the code for you.
| gohil1401 |
1,897,237 | Discover Premier Pediatric Dentist in Rohini with Dr. Manvi Malik | When it comes to the dental health of your little ones, you want nothing but the best. In the heart... | 0 | 2024-06-22T17:32:11 | https://dev.to/content_7179c651c3b9f2f6d/discover-premier-pediatric-dentist-in-rohini-with-dr-manvi-malik-1oo | When it comes to the dental health of your little ones, you want nothing but the best. In the heart of Rohini, there lies a gem in pediatric dentistry—Dr. Manvi Malik’s pediatric dental clinic. A trusted name in the community, Dr. Malik’s clinic stands out not just for its state-of-the-art facilities but for the exceptional care and compassion extended to every young patient. Here’s why you should definitely visit Dr. Manvi Malik’s clinic for your child’s dental needs.
Where Care Meets Expertise: Our Experienced and Compassionate Team
At Dr. Manvi Malik’s pediatric dental clinic, the staff is the cornerstone of the exceptional care provided. Each member of the team is meticulously trained not only in dental procedures but also in child psychology. This dual expertise ensures that every visit is both educational and enjoyable for the child. The staff's warm, friendly demeanor helps to create a welcoming environment where children feel safe and parents feel confident about the care their children are receiving.
Dr. Malik herself is a highly experienced pediatric dentist with years of practice dedicated to children's dental health. Her gentle approach and understanding of children's fears and anxieties about dental visits make her a favorite among both kids and their parents. She believes in educating children about their dental health in a fun and engaging way, ensuring that they carry good oral hygiene habits into adulthood.
A Child-Friendly Environment
One of the standout features of Dr. Malik’s pediatric dental clinic is its child-friendly environment. The clinic is designed to be visually appealing and comforting to children, with colourful décor, engaging waiting for areas filled with toys and books, and treatment rooms equipped with screens for watching cartoons or movies during procedures. This thoughtful design helps in reducing anxiety and makes the dental visit a pleasant experience for the young patients.
Educating for a Lifetime of Healthy Smiles
Dr. Malik is a firm believer in the power of education. She takes the time to educate both children and their parents about proper oral hygiene practices. Through fun and interactive sessions, children learn about the importance of brushing, flossing, and maintaining a healthy diet for their teeth. Parents are also provided with valuable tips and resources to help support their child’s dental health at home.
A Trusted Name in Rohini
The reputation of Dr. Manvi Malik’s pediatric dental clinic in Rohini is built on trust, reliability, and excellence. Parents across the community have expressed their satisfaction with the quality of care and the positive experiences their children have had at the clinic. The numerous positive testimonials and word-of-mouth recommendations speak volumes about the clinic’s commitment to providing the best pediatric dental care.
Why Choose Dr. Manvi Malik?
Choosing a dentist for your child is a significant decision. With Dr. Manvi Malik, you are choosing a professional who is not only skilled and experienced but also deeply compassionate about her work. Her clinic offers a comprehensive range of services in a warm, child-friendly environment, making dental visits something children look forward to rather than fear.
Conclusion: Pediatric Dentist in Rohini
In conclusion, if you are in Rohini and seeking exceptional dental care for your child, look no further than Dr. Manvi Malik’s pediatric dental clinic. With her experienced team, comprehensive services, and a nurturing environment, Dr. Malik ensures that your child’s dental health is in the best hands. Schedule a visit today and take the first step towards a lifetime of healthy, happy smiles for your child.
In summary, Dr. Manvi Malik’s pediatric dental clinic offers a comprehensive range of services designed to meet the unique needs of children. From preventive care to emergency treatments, every service is provided with a focus on quality, compassion, and the long-term dental health of your child.
https://www.itrust2dental.com/pediatric-dentist-in-rohini | content_7179c651c3b9f2f6d | |
1,897,236 | Using the KingFisher library in iOS development. | The Kingfisher library is a valuable tool for efficiently loading and displaying images in iOS... | 0 | 2024-06-22T17:30:11 | https://dev.to/codebymattz/using-the-kingfisher-library-in-ios-development-11ph | ios, apple, mobile, swift | The Kingfisher library is a valuable tool for efficiently loading and displaying images in iOS applications. Since its emergence about 8 years ago, the iOS community has widely adopted it due to its simplicity, performance, and robust features. Kingfisher is an open-source library with over 200 contributors to date and more than 2,500 commits.
**Advantages offered by the library:**
**_Efficient Loading_**: One of Kingfisher’s main advantages is its asynchronous image loading, ensuring that the application remains responsive while images are downloaded. This is essential for providing a smooth user experience, especially in image-heavy apps.
**_Automatic Cache_**: Kingfisher automatically manages image caching, eliminating the need for manual intervention. This not only improves the efficiency of the application but also saves bandwidth and speeds up loading times for previously downloaded images.
**_Simple Integration_**: The library offers smooth integration with UIImageView, simplifying the process of loading and displaying images. With just a few lines of code, you can implement advanced functionality such as displaying placeholder images during download.
**_Visual Feature Support_**: Kingfisher supports placeholders, smooth transitions, and prevention of memory retention issues.
## Implementing the Kingfisher Library in iOS Development: A Practical Example
Recently, I integrated the library into my Pokedex project, which is simple but can experience delays in loading images due to the number of Pokémon to be displayed. The use of Kingfisher fits perfectly in this scenario. Here’s a practical implementation example:
import SwiftUI
import Kingfisher
struct PokemonCell: View {
let pokemon: PokemonModel
@State private var image: UIImage?
var body: some View {
let color = Color.pokemon(type: pokemon.pokemonType)
ZStack {
VStack {
HStack {
title
Spacer()
type
}
.padding(.top, 10)
.padding(.horizontal, 10)
if let url = URL(string: pokemon.imageUrl) {
KFImage(url)
.placeholder {
ProgressView()
}
.resizable()
.scaledToFit()
.frame(width: 130, height: 150)
.padding(10)
}
}
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(color)
.cornerRadius(12)
.shadow(color: color.opacity(0.7), radius: 6, x: 0.0, y: 0.0)
}
var title: some View {
Text(pokemon.name.capitalized)
.font(.headline).bold()
.foregroundColor(.white)
}
var type: some View {
Text(pokemon.pokemonType.rawValue)
.font(.subheadline).bold()
.foregroundColor(.white)
.padding(.horizontal, 10)
.padding(.vertical, 6)
.overlay(
RoundedRectangle(cornerRadius: 20)
.fill(Color.white.opacity(0.25))
)
}
As you can see, the implementation is straightforward. Follow the steps in this example:
**Import the Kingfisher library: Make sure to add import Kingfisher at the beginning of your Swift file to access the library's resources.**
**Define your SwiftUI Cell: In the example above, I created the PokemonCell structure to represent the Pokémon cell. The image URL comes from the PokemonModel model (remember that I used the MVVM architecture in this project).**
**Simple Loading and Caching: Use KFImage(url) to load the image from the URL provided by the template. The .placeholder block displays a progress indicator while loading. Kingfisher automatically takes care of caching, ensuring a fast and efficient user experience.**
**And with that, you already have everything you need!** | codebymattz |
1,897,235 | 🌟 Exciting News: Unstoppable in Namma Yarti Open Mobility Challenge! 🚀 | Hey Everyone, Certifications Link: Unstop-Certifications I'm thrilled to share that I've... | 0 | 2024-06-22T17:27:58 | https://dev.to/bvidhey/exciting-news-unstoppable-in-namma-yarti-open-mobility-challenge-1f09 | Hey Everyone,
**Certifications Link:** [Unstop-Certifications](https://github.com/Vidhey012/My-Certifications/tree/main/Unstop)
I'm thrilled to share that I've participated in the Namma Yarti Open Mobility Challenge! This challenge has been an incredible opportunity to explore innovative solutions and contribute to shaping the future of mobility. It's been an enriching experience, allowing me to delve into Problem Solving Key Experience.
I'm grateful for the support and encouragement from everyone who has been part of this journey. Your support means a lot to me!
Looking forward to more such opportunities that push boundaries and drive meaningful change! | bvidhey | |
1,897,234 | 🎉 Exciting News: Unstoppable Flipkart Grid 5.0 Certificate Achieved! 🏆 | Hey Everyone, Certifications Link: Unstop-Certifications I'm thrilled to share that I've... | 0 | 2024-06-22T17:26:25 | https://dev.to/bvidhey/exciting-news-unstoppable-flipkart-grid-50-certificate-achieved-3ld7 | Hey Everyone,
**Certifications Link:** [Unstop-Certifications](https://github.com/Vidhey012/My-Certifications/tree/main/Unstop)
I'm thrilled to share that I've successfully completed the Unstoppable Flipkart Grid 5.0 program! This experience has been incredibly enriching, allowing me to dive deep into ML & Full Stack. It's been a fantastic journey of learning and growth, and I'm excited to leverage these new insights in my professional endeavors.
A big thank you to everyone who supported me along the way. Your encouragement means the world to me!
Here's to embracing new challenges and continuously pushing the boundaries of knowledge! | bvidhey |
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