Question

I have an int variable that basically looks something like this:

101137111

What I want to do, is replace an INT at a particular point. So for example, if I wanted to change the 7 with a 9. How would I achieve that? Bearing in mind that I don’t want to search for a 7, because there might be 7’s before.

So, another example:

var number = 101137111;
var newNumber;

newNumber = number.replaceAtPosition('4') andReplaceWith (9);

so now that should change the 3 to a 9

Answer 1

function replaceAtPosition(number,index,replacement){
    number += '';//to string
    number = number.substring(0,index) + replacement + number.substring(index+1);
    return +number; // to int
}

use it like :

var number = 101137111;
var newNumber = replaceAtPosition(number,4,9);

See this live demo :

http://jsfiddle.net/gion_13/m86yt/