teleren/devto huggingface dataset:
La Programmation Asynchrone en JavaScript.
Tags: javascript, beginners, programming, node
Published: 2024-03-24 11:58:16

La programmation asynchrone est un concept clé en JavaScript, essentiel pour créer des applications web modernes réactives et performantes. Comprendre comment travailler de manière asynchrone est crucial pour éviter le blocage de l'interface utilisateur et pour gérer efficacement les opérations telles que les requêtes réseau, les lectures/écritures de fichiers et les interactions avec des bases de données. Dans cet article, nous explorerons les principes fondamentaux de la programmation asynchrone en JavaScript et comment les utiliser efficacement dans vos projets.

1. **Qu'est-ce que la Programmation Asynchrone ?**

La programmation asynchrone en JavaScript permet d'exécuter des opérations sans bloquer l'exécution du reste du code. Au lieu d'attendre que chaque opération se termine avant de passer à la suivante, les opérations asynchrones peuvent être exécutées en parallèle, ce qui permet de maintenir la réactivité de l'application.

2. **Les Promesses (Promises)**

Les promesses sont un moyen courant de gérer la programmation asynchrone en JavaScript. Une promesse représente une valeur qui peut être disponible immédiatement, dans le futur ou jamais. Elle peut être dans l'un des trois états suivants : en attente (pending), résolue (fulfilled) ou rejetée (rejected).

```
const fetchData = () => {
  return new Promise((resolve, reject) => {
    // Effectuer une opération asynchrone, par exemple une requête réseau
    setTimeout(() => {
      // Simulation d'une requête réussie
      resolve("Données récupérées avec succès");
    }, 2000);
  });
};

fetchData()
  .then((data) => {
    console.log(data);
  })
  .catch((error) => {
    console.error(error);
  });

```
Dans cet exemple, fetchData est une fonction qui retourne une promesse. Nous utilisons ensuite les méthodes then et catch pour gérer la résolution ou le rejet de la promesse.

3. **Les Fonctions Asynchrones (Async/Await)**

Les fonctions asynchrones (async/await) sont une syntaxe moderne pour gérer la programmation asynchrone en JavaScript. Elles offrent une alternative plus lisible et expressive aux promesses, en permettant d'écrire du code asynchrone de manière séquentielle et synchrone.

```
const fetchData = () => {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve("Données récupérées avec succès");
    }, 2000);
  });
};

const getData = async () => {
  try {
    const data = await fetchData();
    console.log(data);
  } catch (error) {
    console.error(error);
  }
};

getData();

```
Dans cet exemple, getData est une fonction asynchrone qui utilise await pour attendre que la promesse retournée par fetchData soit résolue.

**Conclusion**

La programmation asynchrone est un concept fondamental en JavaScript, permettant de créer des applications web réactives et performantes. En comprenant et en maîtrisant les promesses et les fonctions asynchrones, vous serez en mesure de gérer efficacement les opérations asynchrones dans vos projets JavaScript, tout en maintenant un code propre, lisible et maintenable.
On The Importance of End-to-End Monitoring for IoT
Tags: iot, devops, monitoring, sre
Published: 2024-03-24 11:46:05


### The Importance of End-to-End Monitoring for IoT

IoT systems are made up of many building blocks these days. A common setup looks like this: You have an edge gateway communicating via the public Internet or via VPNs to an MQTT broker (the "southbound" interface). The gateways send messages with telemetry data from attached devices and machines. This data gets processed by normalization and transformation services before it is written to a time series database. REST or GraphQL APIs make the data available to a user interface or third-party systems (the "northbound" interface). The fundamental business function of this IoT system is that it can ingest data, process it, store it and make it available. All other business functions (KPI calculation, alert detection, etc) are usually built upon this basic one. It spans the southbound and northbound interfaces and all the steps in between.

You must, at all times, know the status of this functioniality. If it breaks, you must be the first to know, so you can start fixing.

End-to-end monitoring will give you this knowledge and the confidence in your IoT solution that follows from it.

### How does an IoT End-to-End Check look like?

An end-to-end check could look like this: Each time it runs, it will send data to your MQTT broker. Often, sending just one datapoint is enough - more can be necessary if you want to also monitor the data processing logic. Your check will then start quering the REST of GraphQL API, until it can read the exact value that it sent previously. The datapoint's value is often a UUID or a timestamp so it can be uniquely identified. If you received the value before your check times out, your check is green, if you don't, or if it took too long, it's red.

This kind of check also gives you a useful metric: The end-to-end latency of data ingestion, processing and storage. You can use this to detect gradual decreases in performance (maybe the ingestion performance of your time-series database gets worse, the more data it stores) or of temporary spikes (if devices send more data during certain times of the day, causing congestions and delays in the data processing). The end-to-end latency is also a good SLA metric for reporting the perfomance to stakeholders.

### Taking Action

If the end-to-end check breaks, your on-call DevOps staff must be informed right away, so that they can investigate. It will not tell them *what* is wrong, but it will tell them *that* something is wrong. They can now use more fined grained monitoring metrics to pinpoint the cause of the issue. To be clear: End-to-end monitoring isn't a replacement for individual component checks, it’s a complementary tool. 

If your time for setting up monitoring checks is limited (as it often is, because features are deemed more important than reliability): Make sure you have at least this end-to-end monitoring check in place. It's a lot of value for a small amount of effort.
Comprendre les Props en React.js
Tags: javascript, jsx, react, webdev
Published: 2024-03-24 11:32:38

Dans le développement d'applications React.js, les "props" (propriétés) jouent un rôle fondamental. Ils permettent de transmettre des données d'un composant parent à un composant enfant de manière efficace et flexible. Comprendre comment les props fonctionnent est essentiel pour maîtriser la construction d'interfaces utilisateur dynamiques et modulaires.

1. **Qu'est-ce que les Props ?**
Les props sont des objets JavaScript utilisés pour transmettre des données entre les composants React. Lorsqu'un composant parent rend un composant enfant, il peut lui passer des valeurs sous forme de props. Ces valeurs peuvent être des données simples telles que des chaînes de caractères ou des nombres, ou même des fonctions et des objets plus complexes.

2. **Passage de Props**
Le passage de props se fait en ajoutant des attributs à un composant lors de son utilisation dans un autre composant. Par exemple :

```
<MyComponent name="John" age={30} />
```
Dans cet exemple, nous passons deux props à MyComponent : name avec la valeur "John" (une chaîne de caractères) et age avec la valeur 30 (un nombre).

3. **Utilisation des Props** 
À l'intérieur du composant, les props sont accessibles via un objet appelé props. Par exemple :

```
const MyComponent = (props) => {
  return (
    <div>
      <p>Name: {props.name}</p>
      <p>Age: {props.age}</p>
    </div>
  );
};

```
Dans ce composant MyComponent, nous affichons les valeurs des props name et age en les récupérant à partir de props.

4. **Props et Composants Dynamiques**
Les props permettent de rendre les composants React dynamiques et réutilisables. En passant différentes valeurs de props à un même composant, celui-ci peut s'adapter et afficher des informations différentes en fonction du contexte dans lequel il est utilisé.

**Conclusion**
En résumé, les props sont un mécanisme puissant de React.js permettant de transmettre des données entre les composants. Ils favorisent la modularité, la réutilisabilité et la flexibilité des interfaces utilisateur, contribuant ainsi à la création d'applications web modernes et performantes. Comprendre comment utiliser correctement les props est donc essentiel pour devenir un développeur React.js efficace et compétent.
CORS(Cross-Origin Resource Sharing) for Web Developers
Tags: webdev, javascript, programming, backend
Published: 2024-03-24 11:32:15

CORS is a security mechanism implemented by web browsers that allows or restricts requests for web page resources from another domain outside the domain from which the first resource was served.
The core of CORS allows controlled access to resources from different origins (domains). and prevents unauthorized access that can lead to information security - vulnerabilities such as cross-site request forgery (CSRF) or sensitive data flow. 
When a web page requests a resource for another domain, the browser by default limits the response from the requesting page unless the server explicitly allows it. This is where CORS comes into play. By adding special HTTP headers to responses, servers can tell browsers whether they allow requests from multiple sources and which domains are allowed to use their resources.

## Common CORS headers:

1. - **Access-Control-Allow-Origin**: Specifies which origins can access the resource. This can be a specific domain name, "*" or empty.
2. - **Access-Control-Allow-Methods**: Indicates which HTTP methods (GET, POST, PUT, DELETE, etc.) are allowed when accessing the resource.
3. - **Access-Control-Allow-Headers**: Specifies which headers can be used during the actual request.
4. - **Access-Control-Allow-Credentials**: Indicates whether the browser should include credentials (eg cookies) in resource requests.
5. - **Access-Control-Max-Age**: Specifies how long the pre-check request results can be cached. 

## Handling CORS:
To enable CORS, the server must be configured to include these headers in responses to multi-origin requests. However, it is important to understand the potential security implications and properly configure CORS to mitigate the risks. For developers experiencing CORS issues, troubleshooting includes examining the server's CORS configuration, sending the correct headers, and securing client-side code.
In addition to pre-checking requests, understanding is very important when dealing with complex cross-examinations. Precheck requests are additional requests sent by the browser to determine if the actual request is safe to send. These pre-check requests use the HTTP OPTIONS method and contain special headers that inform the server about the details of the actual request.

## Conclusion
Finally, CORS is an important security feature that allows controlled access to resources from different sources in web development. . By understanding how CORS works and properly configuring it on servers, developers can ensure secure and seamless communication between web applications while avoiding potential security risks .
Long Time No See, JavaScript
Tags: javascript, webdev, programming, beginners
Published: 2024-03-24 10:54:39

My coding journey started with JavaScript 7 years ago. Back then, I was knee-deep in React Native, building a mobile app for a hospital that served both Android and iOS users. We were all about `componentDidMount`, `componentWillUnmount`, and carefully managing state changes. One wrong move and the app would re-render repeatedly, dragging performance down the drain. On top of that, the React Native community felt relatively small. When problems arose, we often had to wait for library updates or delve into the Android/iOS codebase for custom fixes.

Fast forward to today, and things have dramatically changed in the JavaScript world! Recently, I joined a new project using ReactJS to build a website. I've always kept an eye on React's releases, particularly the introduction of Hooks. I knew their potential but hadn't used them in a real project until now. Let me tell you, they're fantastic!


![Fantastic](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/y3hebowdqm495io1hmbx.jpg)

Hooks have streamlined my development process significantly. Gone are the days of complex lifecycle methods and meticulous state management. Hooks offer a cleaner, more intuitive way to manage component behavior and state. It's a breath of fresh air!

![Fresh air](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/uwf9m7vvh08fzvw829yh.jpg)
But the excitement doesn't stop there. I've also discovered the wonders of Next.js. This powerful framework has become a close friend in my web development journey. Building a personal website with Next.js has been a breeze – it's simply that cool!

The expansive JavaScript ecosystem continues to astound me. With frameworks like Angular and Vue.js at our disposal, the potential for crafting remarkable web experiences seems boundless. This abundance of tools and technologies fuels both excitement and a sense of awe, propelling us to explore new horizons.

**So, what does this all mean?**

For me, it's a reminder of the constant evolution in the world of technology. JavaScript, once a familiar companion, has transformed into a powerful ecosystem brimming with innovation. As developers, we need to embrace these changes and continuously learn to stay relevant.

**Looking ahead, I'm eager to explore further. What are your experiences with the latest JavaScript advancements?**  Let's keep the conversation going in the comments below!
Whisperer Ai 2024 Review
Tags: makemoneyonlne, webdev, beginners, react
Published: 2024-03-24 10:38:34

[AI Whisperer 2024](https://warriorplus.com/o2/a/dpf2k2/0
) Review Overview
Creator: highest
Front-End Price: $15
Product: AI Whisperer 2024
Official website: Click Here
Guarantee: 30 Money Back
Niche: Ai SofTware
Recommendation: Highly Recommended!
How to create a Popover using Tailwind CSS.
Tags: javascript, webdev, react, css
Published: 2024-03-24 10:31:56

Popover is a common UI element in web applications, providing a way to display additional information or options when interacting with a particular element. With React and TailwindCSS, most of the time developers use an npm library for the Popover or Popover. You know, when we use an npm library, it increases the project build sizes.
In this article, I will create a reusable Popover component using Tailwind CSS. We will use click and hover triggers for the Popover.

**The Popover component:**

```
// @flow strict
"use client"
import { useEffect, useRef, useState } from "react";

function ReactPopover({
  children,
  content,
  trigger = "click"
}) {
  const [show, setShow] = useState(false);
  const wrapperRef = useRef(null);

  const handleMouseOver = () => {
    if (trigger === "hover") {
      setShow(true);
    };
  };

  const handleMouseLeft = () => {
    if (trigger === "hover") {
      setShow(false);
    };
  };

  useEffect(() => {
    function handleClickOutside(event) {
      if (wrapperRef.current && !wrapperRef.current.contains(event.target)) {
        setShow(false);
      }
    }

    if (show) {
      // Bind the event listener
      document.addEventListener("mousedown", handleClickOutside);
      return () => {
        // Unbind the event listener on clean up
        document.removeEventListener("mousedown", handleClickOutside);
      };
    }
  }, [show, wrapperRef]);

  return (
    <div
      ref={wrapperRef}
      onMouseEnter={handleMouseOver}
      onMouseLeave={handleMouseLeft}
      className="w-fit h-fit relative flex justify-center">
      <div
        onClick={() => setShow(!show)}
      >
        {children}
      </div>
      <div
        hidden={!show}
        className="min-w-fit w-[200px] h-fit absolute bottom-[100%] z-50 transition-all">
        <div className="rounded bg-white p-3 shadow-[10px_30px_150px_rgba(46,38,92,0.25)] mb-[10px]">
          {content}
        </div>
      </div>
    </div>
  );
};

export default ReactPopover;
```
In this component the trigger default value is click and you can pass hover as an attribute. When you click outside of the Popover, the Popover will be closed.
**Use the Popover component:**

```
import ReactPopover from "@/components/common/react-popover";

const Page = () => {
  return (
    <div className="w-screen h-screen flex justify-center items-center gap-4">
      <ReactPopover
        content={
          <p>This Content Will be render in Popover.</p>
        }
      >
        <button className="bg-indigo-500 px-4 py-1.5 border rounded text-white">
          Click me
        </button>
      </ReactPopover>
      <ReactPopover
        trigger="hover"
        content={
          <p>This Content Will be render in Popover.</p>
        }
      >
        <button className="bg-indigo-500 px-4 py-1.5 border rounded text-white">
          Hover me
        </button>
      </ReactPopover>
    </div>
  );
};

export default Page;
```
How to count the numbers of vowels and consonants in a sentence in python
Tags: programming, python, codechallenger, developer
Published: 2024-03-24 10:19:56

This program prompts the user to input a phrase, then counts the number of vowels and consonants present in that phrase, ignoring uppercase letters and considering only alphabetical characters.

```py
def count_vowels_consonants(phrase):
    vowels = 0
    consonants = 0
    # Converting the phrase to lowercase for easier comparison
    phrase = phrase.lower()
    # Defining a list of vowels
    vowels_list = ['a', 'e', 'i', 'o', 'u']
    # Iterating over each character in the phrase
    for character in phrase:
        # Checking if the character is a letter
        if character.isalpha():
            # Checking if the character is a vowel
            if character in vowels_list:
                vowels += 1
            else:
                consonants += 1
    return vowels, consonants

# Asking the user to input a phrase
user_phrase = input("Enter a phrase: ")
# Calling the function and storing the result
num_vowels, num_consonants = count_vowels_consonants(user_phrase)
# Displaying the results
print("Number of vowels:", num_vowels)
print("Number of consonants:", num_consonants)
```
you can also complete the following challenge [here](https://chat-to.dev/post?id=108)
Introducing an open-source platform named StoryForge
Tags: webdev, productivity, angular, opensource
Published: 2024-03-24 10:19:13

## Unleash Your Inner Storyteller with StoryForge! ✍️✨
### Craft and Unleash Interactive Narratives

**StoryForge Platform** is an open-source platform powered by Angular that empowers you to build immersive narrative experiences with branching storylines, choices, and quizzes where you can pass and go to the next step or you can fail and be punished. It provides a user-friendly interface for crafting dynamic stories where players' decisions shape the outcome. right now is at the starting phase.

**Here's what StoryForge offers**:

- Drag-and-drop interface for easy story creation
- Branching storylines for unique player experiences
- Quizzes and challenges to boost engagement
- Choice-based gameplay with impactful decisions
- Modular components for efficient storytelling
- Multiplatform support for wide accessibility
- Collaborative community for sharing and learning
- Open-source development for constant innovation

**StoryForge is perfect for**:

- `Educators`: Create interactive learning experiences
- `Content Creators`: Develop interactive fiction, games
- `Marketers`: Design engaging campaigns and branded content
- `Trainers`: Build simulations and decision-making exercises

**Join the StoryForge community and**:

- Unleash your creativity and craft captivating stories
- Enhance audience engagement and emotional connections
- Promote learning through interactive storytelling
- Collaborate with other creators and developers
- Contribute to an open-source project
- StoryForge is where creativity meets learning and technology!

**_Let's build a diverse stories library that engages, challenges, and inspires!_**
**_Find StoryForge on GitHub: [StroyForge](https://github.com/it-illyria/story-forge)_**
Jeff Christian Partners: Constructing the Summit of Corporate Excellence
Published: 2024-03-24 09:51:01

**_[Jeff Christian Partners](https://christianandtimbers.com/)_** is a beacon of excellence in the realm of corporate consultancy, dedicated to constructing the summit of corporate excellence. With a steadfast commitment to innovation, integrity, and client success, the firm has earned its reputation as a leader in the industry. Let's delve into how Jeff Christian Partners is shaping the landscape of corporate excellence.


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/tisbcwtt4cr97m5gkfpr.jpg)

**A Legacy of Success**
Founded on the principles of innovation and dedication to client satisfaction, Jeff Christian Partners boasts a legacy of success. From its inception, the firm has been driven by a passion for excellence, striving to exceed expectations and deliver exceptional value to its clients. This unwavering commitment to achieving excellence in every endeavor has solidified Jeff Christian Partners' position as a trusted advisor and partner to businesses worldwide.

**Innovative Solutions**
At Jeff Christian Partners, innovation is at the forefront of its operations. The firm is continuously seeking out new ways to drive business growth, improve efficiency, and enhance competitiveness. Through cutting-edge technologies, data-driven insights, and forward-thinking strategies, Jeff Christian Partners empowers its clients to stay ahead of the curve and achieve sustainable success in today's dynamic business environment.

**Client-Centric Approach**
Jeff Christian Partners takes a client-centric approach to consulting, prioritizing the unique needs and goals of each client. The firm understands that every business is different, and tailors its solutions accordingly. By building strong relationships based on trust, communication, and collaboration, Jeff Christian Partners ensures that its clients receive personalized attention and support throughout the engagement.

**Empowering Leadership**
At Jeff Christian Partners, leadership is about more than just providing advice—it's about empowering clients to reach their full potential. The firm's team of experienced consultants serves as trusted advisors, mentors, and guides, helping clients navigate complex challenges and seize new opportunities. Through mentorship, coaching, and skill development, Jeff Christian Partners empowers leaders to make informed decisions, drive organizational change, and achieve their strategic objectives.

**Conclusion**
In conclusion, Jeff Christian Partners is dedicated to constructing the summit of corporate excellence through its commitment to innovation, integrity, client-centricity, and empowering leadership. With a legacy of success, a focus on innovation, and a passion for client success, the firm continues to make a significant impact in the business world. As businesses strive to navigate the complexities of today's marketplace, they can trust Jeff Christian Partners to be their partner in building a future of unparalleled success and excellence.