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

in regex try this:

function getAndIncrementLastNumber(str){
   var myRe = /\d+[0-9]{0}$/g;  
   var myArray = myRe.exec(str);
   return parseInt(myArray[0])+1;​
}

demo : http://jsfiddle.net/F9ssP/1/