Question

I must invert the values of string, changing one by other.

Example:

var x = "my string";
x = someCrazyFunction(x, 'm', 'n');

Then x that was “my string” will become “ny strimg”

How to achieve this?

Answer 1

function someCrazyFunction(str, ch1, ch2) {
    return str.replace(/./g, function(x) {
        return (x == ch1) ? ch2 : (x == ch2) ? ch1 : x;
    });
}

FIDDLE