Question

function(obj){
 if(obj == undefined || obj == null){
   return '';
}

  var id = obj.match(/\d+$/);

  return id || '';
}

I have a DOM element that looks like:

id="some-text-123"

and I want the ‘123’ part of the id to be returned when calling the above function.

other elements might be like:

id="123"
id="some-123"
id="some-ting-else-1"

I called this on an element that looked like “some-text-213”

and it seemed to return an array, I just want the id returned.

Answer 1

The match method returns an array, the first item of which contains the entire matched text. Update your return statement to reflect this:

return id ? id[0] : '';