JQuery: Turn array input values into a string optimization

Question

Hi all, using jQuery I have the following code:

var selectedIdsArray = $("#selectId option:selected").map(function(){return this.value;});
var selectedIdsStr = $.map(selectedIdsArray, function(val){ return "" + val + "";});

It successfully retrieves a string of ids eg. selectedIdsStr = "2,45,245,1" from an <select multiple='multiple'> element. I was wondering if there is a more efficient way (less code) to achieve this?

Thanks!

Answer 1

You could change the second line like this:

var selectedIdsStr = selectedIdsArray.get().join(',');

Answer 2

var selectedIdsStr = $("#selectId option:selected").map(function(){
   return $(this).val();
}).get().join(",");

adapted from http://docs.jquery.com/Traversing/map#callback