How to split variable in JavaScript?

Question

If I have a variable

var number = 123

how can I split it into an array like this?

[0]=1
[1]=2
[2]=3

I know there is a string split but what about variables?

Answer 1

You can convert your number to a string, then use split() on it, then map it back to numbers like this:

var num = 123; // 123
var str = num.toString(); // "123"
var arr = str.split(''); // ["1", "2", "3"]
var numberArr = arr.map(Number); // [1, 2, 3]

Answer 2

If you want to get really cheeky you can do this, since strings are indexed in an array-like fashion.

function splitNum(num) {
  return Array.prototype.map.call(num.toString(), Number);
}

var num = splitNum(555); // >> [5, 5, 5]

Answer 3

var number = 123;
var temp;

number = number.toString();

for (var i = 0; i < number.length; i++)
{
    temp = number[i];
    number[i] = number[number.length - 1 - i];
    number[number.length - 1 - i] = temp;
}

console.log(number[0]);
console.log(number[1]);
console.log(number[2]);