How to Turn Values Into Arrays in JavaScript

You can easily turn any value into an array in JavaScript by wrapping it into an Array.of array method call:

Array.of(7); // Returns [7]
Array.of(true, false); // Returns [true, false]
Array.of('Abbot', 'Costello'); // Returns ['Abbot', 'Costello']

No matter how many arguments you want to work with, Array.of accepts a variable number of arguments, meaning you can play with any number of values. You can also simply use the Array object as a wrapper, but note that it won't work for single numbers:

Array.of(7); // Returns [7]
Array(7); // Returns [empty x 7]

Array(true); // Returns [true]
Array('Abbot') // Returns ['Abbot']

Have a long string that you also want to turn into numbers before turning it into an array? You can use the split method in combination with a map:

'123456789'.split('').map(item => Number(item)) // Returns [1, 2, 3, 4, 5, 6, 7, 8, 9]

50 JavaScript Interview QuestionsAnd their answers explainedHere are 50 JavaScript interview questions that often come up during a technical interview. In one place, one resource to learn from.Learn More

Get access to 300+ webtips 💌

Level up your skills and master the art of frontend development with bite-sized tutorials.

We don't spam. Unsubscribe anytime.

Get Access to Webtips

---

Resources:

• Documentation for Array.of
• The Array object