JavaScript’s reduce is one of the most useful array methods that should be in a developer’s arsenal. Introduced in ES5, it’s somewhat similar to for…each and map methods that are used with ...

JavaScript’s arrays can hold heterogeneous ... We can use forEach in this way, but the Array.map() function is specifically designed for this purpose. It does not operate on the array itself ...

Arrays are wonderful and a very particular type in JavaScript. There are many useful built-in properties and methods that will help you resolve any task which involves this kind of type.