javascript split string at parts

Question

Possible Duplicate:
Format numbers in javascript

I have a string represents a number: "3507654" I need to split it on a parts, by 3, e.g "3 507 654"

Number can be any value, but always a number.

Answer 1

You could do the following:

"3507654".replace(/(\d)(?=(?:\d{3})+$)/g, "$1 ")

But this is not very efficient since it’s O(n²).