jQuery.reduce.js

/*
	jQuery.reduce - a jQuery plugin for functional programming
	@author	John Hunter
	created	2010-09-17
	use: $.reduce(arr, fnReduce, valueInitial);
	fnReduce is called with arguments: [valueInitial, value, i, arr]
	
	reduce will never be jQuery core - its not prototype :p (http://dev.jquery.com/ticket/1886)
*/
(function ($) {
	
	$.reduce = function(arr, fnReduce, valueInitial) {
		if (Array.prototype.reduce) {
			return Array.prototype.reduce.call(arr, fnReduce, valueInitial);
		}
		
		$.each(arr, function(i, value) {
			valueInitial = fnReduce.call(null, valueInitial, value, i, arr);
		});
		return valueInitial;
	};

})(jQuery);