How to use the map() method In Javascript
The map() method creates a new array populated with the results of calling a provided function on every element in the calling array. It’s particularly useful when you want to transform each element of the array.
Syntax:
let newArray = array.map(callback(currentValue[, index[, array]])
Example: In this example, we will see how to change the value of array elements by using the map() method.
let numbers = [1, 2, 3, 4, 5];
let doubled = numbers.map(function(num) {
return num * 2;
});
console.log(doubled);
Output
[ 2, 4, 6, 8, 10 ]
JavaScript Program to change the Value of an Array Elements
In this article, we will learn how to change the value of an array element in JavaScript. Changing an element is done by using various approaches.
Changing the value of an array element in JavaScript is a common operation. Arrays in JavaScript are mutable, meaning you can modify their elements after they are created. You may want to change an element’s value based on its index or certain conditions.
An item can be replaced in an array using the following approaches:
Table of Content
- Accessing Index
- Using Array Methods
- Using fill() method
- Using the map() method