convert div ids to a string

Question

I'm looking to do this with one line of code.

    var a = '';
    $('#MyDivs div').each(function (){a+=this.id+',';});
    a = a.substring(0,a.length-1);// remove the last comma

I though something like this would do it, but to no avail. Am I on the right tracks??

    $('#MyDivs div[id]').join(', ');

Answer 1

Here you go in one line:

var a = $('#MyDivs div[id]').map(function(){ return this.id }).get().join(', ');

Here's the fiddle: http://jsfiddle.net/tGFeZ/

Answer 2

This should offer some assistance: How to get all of the IDs with jQuery?

There is a one line example there, although it may not be the most attractive solution.