JavaScript

There are several ways to remove duplicate elements from Javascript arrays. In this article I show you 5 ways to eliminate repeated values.

There are several ways to remove elements from a JavaScript array. You can modify the array or you can return a new array instead. Whenever possible, we should avoid mutating the original array.

In this post I will explain how to use the reduce array function in JavaScript and show you practical ways to use it. For example, how do you use reduce to calculate the total of an invoice or to get rid of duplicate values in an array?

Easy examples to learn how to use forEach with simple arrays and with objects. We also cover some common mistakes that we have to avoid.

In JavaScript, what is the difference between == vs ===? Which of the two should I use? Here is a short and clear explanation.

Learn 5 different ways to sum the array item values. As examples, we’ll use arrays of integers and arrays of objects.