teleren/devto huggingface dataset:
How class fields are magically created through constructor by 'implicit assignment'
Tags: javascript, es6, es2015, learning
Published: 2024-02-09 19:52:55

Take a look at the following code which defines a `class Rectangle` with **no** explicit declaration of its fields.

```
//Define a call named Rectangle
class Rectangle {
  //Declaration of height and width fields are absent
  constructor(height, width) {
    this.height = height;
    this.width = width;
  }
}

```

Now, lets instantiate an object for this class

`const rec1 = new Rectangle(10,20); //Executes without errors`

Now, if you `console.log(rec1.height)` it prints `10` !

**How did JS magically create those fields for you?**

The properties "height" and "width" are indeed created in the Rectangle class without explicitly defining them using let, but it's not exactly spontaneous creation.

## 1. Implicit Assignment:

When you define constructor parameters inside the constructor function, like height and width in this case, JavaScript implicitly assigns those parameters to properties with the same names on the new object being created (this).


## 2. `this` Keyword:

Inside the constructor function, `this` refers to the new object being created (Rectangle instance in this case).

So, `this.height = height` is equivalent to saying **"assign the value of the height parameter to the height property of the new Rectangle object"**.



## 3. No need for `let`:

JavaScript automatically creates properties if they don't already exist when you assign a value to them using `this`.


Therefore, you don't need to explicitly declare let height or let width before assigning them.


In simpler terms:

When you create a new Rectangle object with specific height and width values, those values are automatically stored as properties named height and width on that object.


**Bonus**

Take a look at this code

```
function noKeywordVariableDemo(){
	randomVal=15 //not declared as let, const or var
	return randomVal;  
}
```

Now, `console.log(noKeywordVariableDemo)` would print `15`. This is possible because its *assignment without declaration*.

Assignment without Declaration: In pre-ES6 versions of JavaScript (before 2015), you could assign values to variables without explicitly declaring them using keywords like `let`, `const`, or `var`. However, this is generally **discouraged** in modern JavaScript due to scoping issues and potential naming conflicts.


Variable Hoisting: In pre-ES6 JavaScript, variable declarations are "hoisted" to the top of their enclosing scope (global or function). This means that even if you declare `h` later in the function, it appears like it's available from the beginning.


**Why Use Modern Declarations?**

1. **Clarity and Scope**: Declaring variables makes their scope clear and avoids unintended global variable creation.

2. **Safety**: Using let or const prevents accidental reassignment of variables declared with var, reducing bugs.

3. **Modern Practices**: It adheres to modern JavaScript style guidelines and best practices.

Please feel free to correct me if I'm wrong or leave the questions that still bother you in the comments.
Keycloak authentication with your Next.js
Tags: nextjs
Published: 2024-02-09 19:45:25



1. Install the required packages:
```
npm install next-auth keycloak-js
```

2. Create a `pages/_app.js` file with the following code:
```javascript
import { Provider } from 'next-auth/client';
import { useEffect } from 'react';
import Keycloak from 'keycloak-js';

function MyApp({ Component, pageProps }) {
  useEffect(() => {
    const keycloakConfig = {
      url: 'YOUR_KEYCLOAK_URL',
      realm: 'YOUR_REALM',
      clientId: 'YOUR_CLIENT_ID',
    };

    const keycloak = Keycloak(keycloakConfig);

    keycloak.init({ onLoad: 'login-required' }).success((authenticated) => {
      if (authenticated) {
        // If the user is authenticated, render the app
        keycloak.loadUserProfile().success((userProfile) => {
          // Pass the user's profile to the app
          pageProps.user = userProfile;
          renderApp();
        });
      } else {
        // If the user is not authenticated, redirect to Keycloak login
        keycloak.login();
      }
    });

    function renderApp() {
      ReactDOM.render(
        <Provider session={pageProps.session}>
          <Component {...pageProps} />
        </Provider>,
        document.getElementById('root')
      );
    }

    return () => {
      ReactDOM.unmountComponentAtNode(document.getElementById('root'));
    };
  }, []);

  return null;
}

export default MyApp;
```

3. In your Next.js pages, you can access the user's profile using `useSession` from `next-auth/client`. For example, in `pages/index.js`:
```javascript
import { useSession } from 'next-auth/client';

export default function Home() {
  const [session, loading] = useSession();

  if (loading) {
    return <div>Loading...</div>;
  }

  if (!session) {
    return null; // Redirecting to Keycloak login
  }

  return (
    <div>
      <h1>Welcome, {session.user.name}!</h1>
      <button onClick={() => signOut()}>Sign Out</button>
    </div>
  );
}
```

Make sure to replace the placeholders `YOUR_KEYCLOAK_URL`, `YOUR_REALM`, and `YOUR_CLIENT_ID` with your actual
The easiest way to do migrations in WordPress
Tags: wordpress, csv, migration
Published: 2024-02-09 19:01:34

I did lots of plugin migrations between WordPress plugins.

WooCommerce to MemberPress, and vice-versa.

LearnDash to LifterLMS, and vice-versa.

And many others.

In that process I was often faced with the issue of having to write scripts that would import data from custom CSVs to the WordPress database.

**Not anymore!**

I built a plugin that allows anyone to map data from CSVFiles to the WordPress database. The plugin is called **[CSVMapper](https://wordpress.org/plugins/csvmapper/)**. You can use it completely free from the WordPress repository. 🎇

It allows you to add data as post meta, user meta, posts, or even custom tables.

Please let me know if you guys have any feedback!
Seeking Insights: Enhancing Social Interactions in Games and Apps
Tags: discuss, idea, startup, validation
Published: 2024-02-09 18:45:29

In the realm of game and app development, creating compelling social experiences is key to user engagement and retention. Features like real-time chat, friend requests, and personalized recommendations are essential, yet they pose significant challenges in terms of technical complexity and resource demands.

I'm exploring the development of a platform aimed at simplifying the integration of these social features, enabling developers to focus more on their core product rather than backend complexities. Before proceeding, I want to ensure that my solution addresses a genuine need in the developer community.

I'm seeking your feedback:

**1. Current Challenges:** Have you encountered difficulties in implementing social features (e.g., friend requests, chat systems, recommendation algorithms) within your games or apps? If so, what specific aspects have been the most challenging?

**Existing Solutions:** Are current products in the market, such as PlayFab, Photon, or others, meeting your needs for social feature integration? If not, what gaps or limitations have you identified that prevent them from being the ideal solution for your projects?

**Unmet Needs:** What are the critical problems or needs that you believe are not adequately addressed by existing platforms and services? Are there specific features or capabilities you wish were available but haven't found in current offerings?

Your insights will be incredibly valuable in helping me understand the current landscape and ensuring that my solution effectively meets the needs of developers looking to enrich their games and apps with social functionalities.
work from home jobs are available now at Amazon.Earn $40/50/hr.
Tags: webdev, javascript, python, programming
Published: 2024-02-09 18:36:34

★No experience needed
★Free training
★Work in online with your mobile phone\Pc
★Payment everyday
★$40 / $70per hour
★[More details and application link](https://sites.google.com/view/345343/home):👇👇✅
𝑨𝒎𝒂𝒛𝒐𝒏 𝑾𝒐𝒓𝒌 𝑭𝒓𝒐𝒎 𝑯𝒐𝒎𝒆 & 𝑬𝒂𝒓𝒏 $40/50 𝑷𝒆𝒓 𝑯𝒐𝒖𝒓
Published: 2024-02-09 18:34:31

★No experience needed
★Free training
★Work in online with your mobile phone\Pc
★Payment everyday
★$40 / $70per hour
★ [More details and application link here](https://sites.google.com/view/345343/home):👇👇✅
How To Make a Basic Sign Up Page in HTML.
Tags: webdev, programming, tutorial, html
Published: 2024-02-09 18:33:28

Creating a sign-up page in HTML typically means creating a basic, functional form without any specific design or styling. Here's a simple example of how you can achieve this:

```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Undesigned Sign Up</title>
</head>
<body>
    <h2>Sign Up</h2>
    <form action="/signup" method="post">
        <label for="username">Username:</label>
        <input type="text" id="username" name="username" required>
        <br><br>
        
        <label for="email">Email:</label>
        <input type="email" id="email" name="email" required>
        <br><br>
        
        <label for="password">Password:</label>
        <input type="password" id="password" name="password" required>
        <br><br>
        
        <input type="submit" value="Sign Up">
    </form>
</body>
</html>
```
## Explanation

Let's break down what's happening here:

`<!DOCTYPE html>`: This declaration defines the document type and version of HTML being used.
`<html lang="en">`: The opening tag for the HTML document, specifying the language as English.
`<head>`: Contains metadata about the HTML document, such as character set and viewport settings.
`<meta charset="UTF-8">`: Specifies the character encoding for the document.
`<meta name="viewport" content="width=device-width, initial-scale=1.0">`: Sets the viewport properties for better responsiveness on different devices.
`<title>Sign Up</title>`: Sets the title of the document, which appears in the browser tab.
`<body>`: Contains the visible content of the HTML document.
`<h2>Sign Up</h2>`: Heading indicating that this is a sign-up form.
`<form action="/signup" method="post">`: Starts a form with action attribute pointing to the server-side script that will handle the form submission and method attribute set to "post" to send form data securely.
`<label>`: Labels for form fields, enhancing accessibility and usability.
`<input type="text/email/password">`: Input fields for username, email, and password, each with different types to indicate the expected data format.
`required`: Attribute for input fields, making them mandatory to fill out.
`<input type="submit" value="Sign Up">`: Submit button to submit the form data.
This basic HTML structure creates a functional sign-up form without any additional styling or design elements. You can further enhance this form by adding server-side validation and processing, as well as client-side validation using JavaScript. Additionally, you can style the form using CSS to improve its visual appearance.
Network Anomaly Detection Tool
Published: 2024-02-09 18:31:19


## Table of Contents
- [Overview](#overview)
- [Features](#features)
- [Installation](#installation)
- [Usage](#usage)
  
## Overview
This tool is designed for detecting abnormal behaviors in network traffic using the unsupervised Isolation Forest algorithm. It intercepts network packets in real-time, analyzes them, and identifies suspicious activities that deviate from normal patterns.
### ScreenShot
![Screenshot](https://raw.githubusercontent.com/m-alaiady/Abnormality-Detection-System-for-Network-Traffic/main/img/img-2.png)

## Features
- Real-time packet interception and analysis
- Detection of abnormal network behaviors
- User-friendly interface for visualization of intercepted packets
- Configurable parameters for fine-tuning the detection algorithm

## Installation
- Clone the repository:
```bash
git clone https://github.com/m-alaiady/Abnormality-Detection-System-for-Network-Traffic.git
```
- Navigate to the project directory
```bash
cd Abnormality-Detection-System-for-Network-Traffic/
```
- Install the required dependencies:
```bash
pip3 install -r requirements.txt
```

## Usage
Run the following command:
```python
sudo python3 main.py
```
*Important: you need to modify the `interface` variable which in located directly after the main function*
- Adjust the `contamination` parameter in the IsolationForest initialisation to control the sensitivity of the anomaly detection algorithm.
Monitor the console output for intercepted packets and their analysis results.


Visit [GitHub Repository](https://github.com/m-alaiady/Abnormality-Detection-System-for-Network-Traffic) for more details.
Failed to load API definition error in Swagger for ASP.NET Core
Tags: net, webapi, swagger
Published: 2024-02-26 09:40:39

---
title: Failed to load API definition error in Swagger for ASP.NET Core
published: true
date: 2024-02-09 18:30:00 UTC
tags: NET,WebAPI,Swagger,NET
canonical_url: http://www.codetolive.in//.net/web%20api/swagger/Failed-to-load-API-definition-error-in-swagger/
---

There are various reasons cause the swagger to fail to load the API definition and you will get the error shared in the below screenshot. The below are the possible reasons,

1. Swagger misconfiguration
2. Controller methods without HTTP verbs (HttpGet, HttpPost etc.)
3. Same class name etc…

  ![Failed to load definition error in Swagger](http://www.codetolive.in/assets/images/posts/Codetolive_blog_failed_to_load_definition_error.png)  
  

_Fig 1. Failed to load definition error in Swagger_

**_Solution:_**

The Swagger can be launched by adding the ‘/swagger’ after your API URL which doesn’t show the error details causing the Swagger to fail to load.  
http://localhost:{PortNo}/swagger/index.html

If you navigate to ‘swagger/v1/swagger.json’ page you will see error details which helpful in addressing the issues.  
http://localhost:{PortNo}/swagger/v{VersionNo}/swagger.json  
Note: v1 is the version of your API. Change the version according to your API version.

Once all the issues are addressed then you can launch the Swagger URL to view the API definitions.
Scanner class
Tags: java
Published: 2024-02-09 18:26:22



As the nextLine() method consumes the newline character left in the buffer,if used after method like nextInt().

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        int num;
        String str;
        num=input.nextInt();
        str= input.nextLine();
        System.out.print("Hello : ");
        System.out.print(str);
        System.out.print(num);
    }
}

Then , in this code if i provide a input : 1 and press ENTER,the num should contain 1 and str should contain '\n'. But when i try to print out values, only the value of num is printed, and not the value of str (newline character i.e the cursor is not moving to next line). Why so?
Faro.js 🌴🏖️☀️
Tags: javascript, meetup, portugal, softwareengineering
Published: 2024-02-09 18:25:10

Some months ago, my family and I embarked on a new adventure and set sail for the stunning landscapes of Portugal. Yes, we’ve made this place of vibrant culture, breathtaking nature, and delicious cuisine our home. 🏡☀️

However, I find myself missing the thrilling interactions and the spirit of the tech community that I enjoyed back in Poland. The lively tech events and the learning opportunities from meetups — both as an attendee and as an organizer — were not just about technology but also about connecting with people and sharing knowledge.

Feeling this void, I have decided to bring a piece of that community spirit to my new home by starting local meetups focused on front-end technologies (and not only). Especially since there is a lack of such here in the Algarve area. So my goal would be to create a space where tech enthusiasts in Portugal and visitors alike can come together to learn, share, and grow. It’s about recreating that sense of community and collaborative innovation here, where anyone interested in front-end development can find new friendships and inspiration… and maybe even some new business opportunities.

Now, “meetups” might sound ambitious at first, hence my initial step is to create a community. To achieve this, I plan to leverage the Meetup platform as a foundational tool to connect with like-minded individuals. Once we have established a core group of enthusiasts, I hope to organize events. The aim is to gradually build a robust series of events, focusing on modern front-end technologies and beyond. Imagine this: beach, palm trees, sunshine, beer, pizza, and tech discussions 🤩.

So hear me out — while this opportunity might not be a perfect fit for you personally, perhaps someone in your circle — friends, colleagues, or fellow community members — would find it intriguing and interesting. So, I kindly ask for your support in sharing this post and the Meetup group link. A big thank you in advance for any shares, and please, stay tuned for more updates!

**Meetup Group**: www.meetup.com/farojs
**Twitter/X Profile**: www.twitter.com/faro_js
Task 4
Published: 2024-02-09 17:54:57

Manual Testing:

Manual testing is a testing which is done by a tester to test the application software without using any automation tool. Testing is done to ensure the software product/application tested is bug/defect free and delivered to the customer.

Benefits of Manual Testing:
1.Cost effective is one of the major advantages were testing a software on time will save money for a long term. Early testing makes it easy to find defects at early stage and fix it in less cost.
2.Security is one of the important benefits of software testing where people are looking for more trusted and secure products.
3.Testing ensures delivering a quality product to a customer.
4.Customer satisfaction on receiving a quality product.

Disadvantages of Manual Testing:
1.Time consuming on compared to automation testing.
2.Identifying 100% defects is not possible.
3.Need more resources with testing skills to test the application which is highly cost.
4.Delivering a defected product may lead to loss of customer, loss of money and sometimes there are possibilities of losing life.
How to read zip files with SharpZip library in C#
Tags: sharpzip, csharp, zip, dotnet
Published: 2024-02-09 17:52:41

---
title: How to read zip files with SharpZip library in C#
published: true
description: Let's learn how to read zip files in C# using SharpZip
tags: SharpZip, Csharp, zip, dotnet
# cover_image: https://direct_url_to_image.jpg
# Use a ratio of 100:42 for best results.
# published_at: 2024-02-19 11:37 +0000
---

SharpZip library is a great library to work with compressed files like .zip. This library supports Zip, GZip, BZip2, and Tar.

To use this library, add it to your project using the package manager in Visual Studio or with the following command.
```bash
dotnet add package SharpZipLib --version 1.4.2
```

First, we need to add the following namespace to the project.


```csharp
using ICSharpCode.SharpZipLib.Zip;
```

Then to read the file, we need to define the path; it could be a relative or absolute route.

```csharp
var myZipPath = "test.zip";
```

With this simple code snippet, we can loop through all the files in the zip and read their content.

```csharp
using (ZipFile zipFile = new ZipFile(myZipPath))
{
    foreach(ZipEntry zip in zipFile)
    {
        Console.WriteLine(zip.Name);
        using (StreamReader reader = new StreamReader(zipFile.GetInputStream(zip)))
        {
            Console.WriteLine($"Content: {reader.ReadToEnd()}");
            reader.Close();
        }
    }
}
```

You can also check if the ZipEntry value is a folder or a file to avoid issues reading the information. We have a simple condition. We can validate it.

```csharp
using (ZipFile zipFile = new ZipFile(myZipPath))
{
    foreach(ZipEntry zip in zipFile)
    {
        if(!zip.IsDirectory)
        {
            Console.WriteLine(zip.Name);
            using (StreamReader reader = new StreamReader(zipFile.GetInputStream(zip)))
            {
                Console.WriteLine($"Content: {reader.ReadToEnd()}");
                reader.Close();
            }
        }
    }
}
```
Mastering CSS: How to Center a Div
Tags: webdev, css, frontend, scss
Published: 2024-02-09 17:34:34

Although it might appear easy, centering a div element using CSS can occasionally be difficult, particularly when working with various layout conditions. Learning how to center divs is essential for all developers, regardless of expertise level. We'll look at several methods and best practices for centering a div element both vertically and horizontally in this article.


## Horizontal Centering:

**1. Using Margin:**
One of the simplest ways to horizontally center a div is by setting its left and right margins to "auto" and specifying a width. This technique works well for block-level elements.

`.centered-div {
    width: 300px;
    margin-left: auto;
    margin-right: auto;
}`

**2. Using Flexbox:**
Flexbox provides a powerful way to create flexible layouts, including centering elements. By setting the parent container's display property to "flex" and using the "justify-content" property with the value "center," you can easily center the child div horizontally.

`.parent-container {
    display: flex;
    justify-content: center;
}`


## Vertical Centering:

**1. Using Flexbox:**
Flexbox also makes vertical centering straightforward. By combining the "align-items" property with the value "center" in the parent container, you can vertically center the child div.

`.parent-container {
    display: flex;
    align-items: center;
}`

**2. Using CSS Grid:**
CSS Grid Layout offers another approach to vertical centering. By setting the parent container's display property to "grid" and using the "align-items" property with the value "center," you can achieve vertical centering.

`.parent-container {
    display: grid;
    place-items: center;
}`


## Horizontal and Vertical Centering:
A div may occasionally need to be centered inside its parent container in both the horizontal and vertical directions. Here's how to make this happen:

**1. Using Flexbox:**
By combining the "justify-content" and "align-items" properties with the value "center" in the parent container, you can center the child div both horizontally and vertically.

`.parent-container {
    display: flex;
    justify-content: center;
    align-items: center;
}`

**2. Using Absolute Positioning:**
If you know the dimensions of the div you want to center, you can use absolute positioning with the following CSS:

`.centered-div {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}`


In summary, learning how to center div elements using CSS entails comprehending a variety of methods and selecting the best one for your particular layout needs. Whether you're centering vertically, horizontally, or both, CSS offers a number of strong features to help you quickly and effectively get the desired outcome. You'll get skilled at centering div elements and designing elegantly balanced layouts for your web projects with practice and experimentation.