JavaScript Array Reference

JavaScript Array is used to store multiple elements in a single variable. It can hold various data types, including numbers, strings, objects, and even other arrays. It is often used when we want to store a list of elements and access them by a single variable.

Syntax:

const arr = ["Item1", "Item2", "Item3", ...];

Example: Creating an array and copying its items to another array, and displaying the copied items.

// Create and initialize an array
let courses = ["HTML", "CSS", "JavaScript", "React"];

// Display the array items
console.log(courses);
 
// Create a new empty array
let newArray = [];
 
// forEach loop to push elements
// into new array
courses.forEach(function (course) {
    newArray.push(course);
});
 
// Display the new array of items
console.log(newArray);

[ 'HTML', 'CSS', 'JavaScript', 'React' ]
[ 'HTML', 'CSS', 'JavaScript', 'React' ]

JavaScript Array Constructor

In JavaScript, a constructor gets called when an object is created using the new keyword.

JavaScript Array Properties

A JavaScript property is a member of an object that associates a key with a value.

Instance Property:

An instance property is a property that has a new copy for every new instance of the class.

JavaScript Array Methods

JavaScript methods are actions that can be performed on objects.

Static Method:

If the method is called using the array class itself then it is called a static method.

Instance Method:

If the method is called on an instance of a array then it is called an instance method.

Arrays in JavaScript

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Arrays in JavaScript

Working of Arrays in JavaScript