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8 months ago
Understanding useEffect in React
useEffect is one of the most powerful and commonly used hooks in React. It allows you to perform
10 months ago
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How to Connect External Monitor in Ubuntu : A Step-by-Step Guide
Follow this detailed guide to get your multiple screens up and running. First, you need to downlo
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All About Arrays in JavaScript
Introduction
In JavaScript, an array is a data structure used to store a collection of elements. Arrays can hold various types of data, and their size can dynamically change as elements are added or removed.
Creating an Array
You can create an array in JavaScript using the following methods:
1. Array Literal
const numbers = [1, 2, 3, 4, 5];
2. Array Constructor
const fruits = new Array('apple', 'banana', 'orange');
Accessing Array Elements
const colors = ['red', 'green', 'blue'];
console.log(colors[0]); // Output: 'red'
console.log(colors[2]); // Output: 'blue'Array Methods
Adding and Removing Elements
const animals = ['dog', 'cat', 'rabbit'];
// Adding elements
animals.push('hamster'); // Adds 'hamster' to the end
// Removing elements
animals.pop(); // Removes the last element ( 'rabbit' )
Iterating Through an Array
const fruits = ['apple', 'banana', 'orange'];
fruits.forEach(fruit => { console.log(fruit); });Conclusion
Arrays are essential in JavaScript and provide a versatile way to work with collections of data. Understanding how to create, access, and manipulate arrays is fundamental for any JavaScript developer.
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// the hello world program
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test 2
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