Implementing 10 JavaScript array methods by hands

JavaScript includes several functions for working with arrays that go beyond the for loop. You may have used these functions in your own projects and wondered how they work and why you’d use one over another.

A great way to understand how something works is to build your own version from scratch. In this article, you are going to do that by creating your own versions of map, filter, sort, and reduce from scratch. When you’re done, you’ll have a better understanding of these functions and their uses.

By combining ES6 Arrow Functions with JavaScript Array functions, you can write extremely powerful and clean code.

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