How to convert an integer into an array of digits

Question

I want to convert an integer, say 12345, to an array like [1,2,3,4,5].

I have tried the below code, but is there a better way to do this?

var n = 12345; var arr = n.toString().split(''); for (i = 0; i < arr.length; i++) arr[i] = +arr[i] | 0; 

Answer 1

**** 2019 Answer ****

This single line will do the trick:

Array.from(String(12345), Number); 

Example

const numToSeparate = 12345;    const arrayOfDigits = Array.from(String(numToSeparate), Number);    console.log(arrayOfDigits);   //[1,2,3,4,5]

Explanation

1- String(numToSeparate) will convert the number 12345 into a string, returning '12345'

2- The Array.from() method creates a new Array instance from an array-like or iterable object, the string '12345' is an iterable object, so it will create an Array from it.

3- But, in the process of automatically creating this new array, the Array.from() method will first pass any iterable element (every character in this case eg: '1', '2') to the function we set to him as a second parameter, which is the Number function in this case

4- The Number function will take any string character and will convert it into a number eg: Number('1'); will return 1.

5- These numbers will be added one by one to a new array and finally this array of numbers will be returned.

Summary

The code line Array.from(String(numToSeparate), Number); will convert the number into a string, take each character of that string, convert it into a number and put in a new array. Finally, this new array of numbers will be returned.