Finding all checkboxes are checked in jQuery

Question

I have a collection of checkboxes

 
 
 <         


        

Answer 1

I think there would be a good feature in jquery an are function:

jQuery.fn.are = function(selector) {
return !!selector && this.filter(selector).length == this.length;
};

Usage:

if($('input.paid[type=checkbox]').are(':checked'))

Example:

http://jsfiddle.net/9s2vA/

I have found this function at http://api.jquery.com/is/ written by Tgr , when I was checking if this exists.