JavaScript’s arrays can hold heterogeneous types, change size on the fly, and readily insert or remove elements. Traditional methods like slice, splice, and push/pop do this by operating on the ...

Other methods like concat, map, and filter create a copy of the array ... As an example, this is what happens when you reverse an array. const languages = ["JavaScript", "TypeScript", "CoffeeScript"]; ...

JavaScript’s reduce is one of the most useful array methods that should ... we can recursively call the reduce function to flatten and then concatenate them with the final array.

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.