How to Write Your Own Filter, Reduce and Map Methods in JavaScript

How to Write Your Own Filter, Reduce and Map Methods in JavaScript

In this tutorial, you'll see How to Write Your Own Filter, Reduce and Map Methods in JavaScript

This article is inspired from one of the JavaScript Mock interviews on YouTube.

The question was:

Write a function _print() such that [1, 2].print() outputs 1,2 when print() is invoked on the array._

This question made me inquisitive and I researched similar questions of the same type.

That’s what I am going to share in this article.

Before beginning, first let’s get some basics out of the way.

The basic information we need is:

map(), _filter()and reduce()methods are invoked on arrays and written in _Array class in JavaScript.

Let’s keep this in the back of our mind before proceeding.

Okay. One method at a time.

javascript front-end-development

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