_Arrays are list-like objects whose prototype has methods to perform traversal and mutation operations. — _MDN

In this article, we are going to discuss some built-in array methods in JavaScript that will make your life super easy and give you the ability to perform some magical operations on any Array as well as avoid code duplication. Also, you’ll learn what methods to use and when to use them. Without further ado, let’s get down to business.


The forEach Javascript array method is used to iterate through an array and then it runs a callback function on each value on the array and then it returns undefined. The forEach method always returns undefined, so if you try to return a value from a forEach method, you will get undefined.

The forEach method accepts a callback function as its first parameter. The callback function of the forEach method accepts three parameters, the first being the value of the array, the second is the index of each item in the array, and the third is the entire array itself.

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Advanced Array Methods In JavaScript
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