Get and replace the last number on a string with JavaScript or jQuery

Question

If I have the string:

var myStr = \"foo_0_bar_0\";

and I guess we should have a function called getAndIncrementLastNumber(str)

Answer 1

Here's how I do it:

function getAndIncrementLastNumber(str) {
    return str.replace(/\d+$/, function(s) {
        return ++s;
    });
}

Fiddle

Or also this, special thanks to Eric:

function getAndIncrementLastNumber(str) {
    return str.replace(/\d+$/, function(s) {
        return +s+1;
    });
}

Fiddle