How to cast a value as an array in JavaScript

In this Article we will go through how to cast a value as an array only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const castArray = value => Array.isArray(value) ? value : [value];

castArray(1);               // [1]
castArray([1, 2, 3]);       // [1, 2, 3]