teleren/devto huggingface dataset:
JavaScript Unveiled: A Deep Dive into Confusing Concepts for Interview Success
Tags: javascript, programming, interview, webdev
Published: 2024-02-01 07:10:15

## Introduction:
Welcome to our beginner-friendly guide on JavaScript concepts that often puzzle even seasoned developers. This article aims to break down complex topics into simple explanations with real-life examples, making them accessible to everyone, including those new to JavaScript. By the end, you'll have a clearer understanding of these concepts and feel more confident in your JavaScript knowledge.

## 1. The 'this' Keyword in JavaScript

### Understanding 'this'

- In JavaScript, 'this' refers to the object executing the function.
- Its value can change based on the context.
  
Example:

```
const button = document.querySelector('button');
button.addEventListener('click', function() {
  this.textContent = 'Activated'; // ‘this’ refers to the button element.
});
```


## 2. Function Binding with call, apply, and bind

### Mastering Function Binding
- `call()`: Calls a function with a specified 'this' value and individual arguments.
- `apply()`: Similar to `call()`, but arguments are passed in as an array.
- `bind()`: Creates a new function with 'this' bound to specified parameters.

Example:

```
function greet(greeting, punctuation) {
  console.log(`${greeting}, ${this.name}${punctuation}`);
}

const user = { name: 'Rosa' };
greet.call(user, 'Hello', '!'); // “Hello, Rosa!”

```

## 3. The Power of Closures in JavaScript

### Unleashing Closures
- Closures allow functions to access variables from an enclosing scope.
- They act like backpacks of knowledge available even after the function finishes.

Example:

```
function createAdder(x) {
  return function (y) {
    return x + y;
  };
}

const addThree = createAdder(3);
console.log(addThree(4)); // 7 - The function remembers ‘x’!

```

## 4. Prototypal Inheritance Explained

### Understanding Prototypal Inheritance
- JavaScript uses prototypal inheritance instead of traditional class-based inheritance.
- Objects inherit properties and methods from other objects through a prototype chain.

Example:

```
function Animal(name) {
  this.name = name;
}

Animal.prototype.speak = function () {
  console.log(`${this.name} makes a noise.`);
};
```


## 5. Navigating the JavaScript Event Loop

### Event Loop Demystified
- The event loop, microtasks, and macrotasks govern JavaScript's concurrency.
- JavaScript handles non-blocking operations through an event-driven model.

Example:

```
console.log('Start');

setTimeout(() => {
  console.log('Macrotask');
}, 0);

Promise.resolve().then(() => { console.log('Microtask'); });

console.log('End');

```

## Conclusion:
Congratulations! You've navigated through the often-perplexing world of JavaScript concepts. These fundamental ideas are the building blocks of efficient and clean code. Feel free to share your thoughts, ask questions, or explore further. Happy coding!
Guo farm accumulated wealth, the ants lost all their money
Published: 2024-02-01 07:07:33

Guo Wengui is under the false banner of " anti-communist ", but he actually cheated money! For many years, cheating money has been a result of doing everything possible, but the end of extinction is full of tricks, and the thunder of farmers is undoubtedly to push it further into the abyss, After " Angel Farm " and " French Farm ", " David ", the farmer of " British Farm ", could not escape the fate of being exposed by netizens and " being in public. " Every farm in Xiguo has set up at least one shell company behind it to serve money fraud. Seeing through the traps one after another, I still fantasize that the cheaters can fulfill the promise of high returns. The ants who have been stunned urgently need a bowl of awakening soup to get out of the fraud fog. 
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/sb11ult1h2fnh6j7vpj5.png)
Enhancing Cargo Logistics with Arsala Freezer Cargo Tailored Solutions in UAE & GCC
Tags: transport, services
Published: 2024-02-01 07:07:02

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Published: 2024-02-01 06:58:15

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Silly Javascript, says true when asked if (0 == -null); here's why...
Tags: javascript, webdev, interview, programming
Published: 2024-02-01 06:42:04

JavaScript is a versatile programming language known for its flexibility, but this flexibility sometimes leads to interesting behaviors.

For instance, try running the following code in your dev console.


![Console Screenshot](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/vuj1j5u19q4jdyz9vjto.png)


Strange, right? Well, JavaScript behaves this way due to a concept called **type coercion**.

## Type Coercion
Type coercion is the automatic conversion of one data type to another, often performed in JavaScript during operations involving different types. The loose equality operator (==) triggers type coercion, attempting to make the operands comparable. 

In the given expression, the left operand is the number 0, while the right operand involves coercing null to a number. When null is coerced to a number, it results in the value 0. Therefore, the expression essentially becomes 0 == 0.

This outcome might seem surprising at first glance, as one might expect the comparison to be false due to the explicit difference between 0 and -0. However, it is essential to recognize that -null is not equivalent to negative zero but rather zero.

## But, why exactly?

Understanding the mechanics behind this behavior requires insight into JavaScript's type coercion rules. The language attempts to find a common type between the operands, prioritizing numeric values. In this case, the coercion of null to a number yields 0, aligning both sides of the equality check.

While this behavior may be convenient in certain scenarios, it highlights the importance of caution when using loose equality (==) in JavaScript. Developers often prefer the strict equality operator (===), which compares both value and type, avoiding unexpected type coercion and promoting more predictable code.


## Conclusion
The expression 0 == -null in JavaScript showcases the language's type coercion mechanisms. Through automatic conversion, JavaScript aligns the operands by coercing null to a number, resulting in the equality check 0 == 0. This example serves as a reminder of the nuanced aspects of JavaScript's loose equality operator and the importance of understanding type coercion for writing robust and predictable code.
State vs Props in React
Tags: webdev, javascript, beginners, programming
Published: 2024-02-01 06:31:41

**State**

-  The state is a built-in React object / that is used to contain 
   data or information /about the component
-  State is Mutable (changeable) 

```
import React, { useState } from "react";

const App = () => {
  // here defined name as a state variable
  const [name, setName] = useState('Manikandan');
  return <h2>Hi, I am {name}. </h2>
}

export default App;
```


**Props**
- Props allow you to pass data / from one component to other components / as an argument.
- Props are  immutable (not changeable)

```
import React, { useState } from "react";

const App = () => {
  const [name, setName] = useState('Manikandan');
  // here pass the (name state) to the Display component as props
  return <Display name={name} />
}

const Display = (props) => {
  // Here receive the name as props
  // we can use (props) or ({name})
  return <h2>Hi, I am {props.name}. </h2>
}

export default App;

```
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Published: 2024-02-01 06:29:46

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React components -(Class component v/s function component)
Tags: component, webdev, react, functional
Published: 2024-02-01 06:14:00

## What is a Component?

- Component is independent and reusable bits of code.
- Components let you break up the user interface into separate pieces / that can then be reused / and handled independently.


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/sm02o81gwhcq2xg5uhv4.jpg)

## Class Component v/s Function Component

## Class Component : 

- To define a React component / as a class, extend the built-in Component class /  and define a render method.

```
class Welcome extends React.Component {
    render() {
        return <h1>Hello, {this.props.name}</h1>;
    }
}
```

- To use Lifecycle methods in class Components.
- Little complex compared with Functional Components.


**Class component without state**

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/tph0kse53tfoc6vfain4.png)


**Class component with state**

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/dj4mmp90w9df1bt5qbw6.png)

## Function Component : 

- React functional component is a simple JavaScript function / that accepts props and returns a React element. 
- These functions may or may not receive data as parameters.

```
// Normal function 
function Welcome () {
        return <h1>Hello, {this.props.name}</h1>;
    }


//Arrow function
 const Welcome  = () =>  {
        return <h1>Hello, {this.props.name}</h1>;
    }

```

- Function components are called stateless components (Before Introducing hook).
- Access state and other react features (lifecycle methods) using hooks.
- Easy to create Function components.


**function component without state**

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/a6gx7nk885npzwg5nsfu.png)

**function component with state**

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/nfelvooj8soyx76ukl6y.png)
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Published: 2024-02-01 06:04:26

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Why You Can't Get Timely Feedback from Clients as Ecommerce Developers
Tags: hocify, ecommerce, developer, freelance
Published: 2024-02-01 05:39:35

Do you, as a freelance developer, encounter challenges with timely feedback from store owners, hindering progress and causing bottlenecks? Explore a real-life situation with us!

Max: Hey Min, I’ve been reflecting on our progress with the ecommerce website project, and I’ve noticed a recurring challenge we face. Timely feedback plays a crucial role in our workflow, and I believe addressing this issue will significantly improve our efficiency. Mind if we discuss how we can work together to overcome this hurdle?

Min: Absolutely, Max! I’m all ears. What’s been bothering you?

Max: Well, let’s start by exploring why feedback sometimes takes longer than expected. The first ‘why’ question is: Why do you find it challenging to provide timely feedback on the project?

Min: Hmm, good question. I’m juggling multiple tasks with the store operations, and occasionally, it’s tough to find dedicated time for project-related matters.

Max: Thanks for sharing, Min. That leads us to our second ‘why’: Why is it challenging to allocate time for project-related matters amidst your store responsibilities?

Min: Well, managing the store demands constant attention, and unexpected issues often pop up. It’s a balancing act that I sometimes struggle to perfect.

Max: I understand. So, moving on to our third ‘why’: Why do you think it’s challenging to balance store management and project-related tasks effectively?

Min: It’s not easy, Max. Some days, the store demands immediate attention, leaving me with little time to focus on other aspects, including our project.

Max: Got it. Now, for our fourth ‘why’: Why do you think finding a balance between store management and project-related tasks is crucial for the success of our collaboration?

Min: Well, I see that the smoother our collaboration is, the more successful our project will be. It’s about finding a rhythm that works for both the store and our development efforts.

Max: Great insight, Min. Finally, our fifth ‘why’: Why do you think improving our feedback process will have a positive impact on the overall progress and success of the ecommerce website project?

Min: I see the connection now. Timely feedback ensures that the project doesn’t hit unnecessary roadblocks, allowing us to make steady progress towards our goals.

Max: Exactly. By answering these ‘why’ questions, we’ve identified the root cause of the issue. Now, let’s move forward collaboratively to find actionable solutions that work for both of us.

Steps to Get Timely Feedback from Clients for Ecommerce Developers: https://hocify.com/x/GDgo
10 Python Packages to Simplify Your Coding Experience
Tags: beginners, programming, python, tutorial
Published: 2024-02-01 05:14:18

Imagine exploring a vast world of Python programming, like a big city with over 200,000 different tools available. It's full of possibilities, but it can also be a bit overwhelming. Figuring out the most important tools for any Python programmer is really important. To help with that, we've put together a list of ten key Python packages that can be useful in a wide range of programming situations.

NumPy:

Cornerstone of the Python ecosystem, empowering efficient handling of multi-dimensional arr


Read More below

{% embed https://codemagnet.in/2024/02/01/10-python-packages-to-simplify-your-coding-experience/ %}
How to restart PostgreSQL with PgBouncer assist
Tags: postgres, pgbouncer
Published: 2024-02-01 05:12:20

This is step that I use for restarting postgresql.
Note:
Please do this on development only

```bash
pgbouncer> KILL dbname; 
```

Restart postgresql
```bash
$ sudo systemctl restart postgresql-12
```

Resume dbname from pgbouncer
```bash
pgbouncer> RESUME dbname;
```
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Published: 2024-02-01 04:40:25

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I couldn’t realize quickly how dubious their claim was until I was wiped out completely. I was going through a lot of challenges and pain until my childhood friend told me about Firmwall Cyber Security Service, a professional crypto recovery and cybersecurity company with a 100% successful recovery rate, I didn’t hesitate to contact them immediately and provided them with all the information they needed to begin my crypto recovery process, and to my surprise, Firmwall Cyber Security was able to recover my crypto and blocked all access from these con men, closed their accounts and reported them to the relevant authorities. I’m truly grateful for their services and I highly recommend them. Firmwall Cyber Security is providing a service that will enable victims of crypto scams like us to recover our money without any hassle. Their approach is very professional and effective.

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![Uploading image](...)