map() method helps you to create a new array by calling a function on each element of the Array. This function is a custom function which can be used in order to manipulate data within an array and get a new resultant array.

A simple implementation of map() over an Array. Let’s find the square of all the possible numbers in an array.

ES5 Implementation

ES6 Implementation

This can be seen in action out here below.

Check out all the other posts on JavaScript Essentials to get a Grasp of these JavaScript Utilities.


Also published on Medium.

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