jQuery.reduce.js

/**
* jQuery.reduce - a jQuery plugin for functional programming
* @author	Alex Batalov, John Hunter
* use: $('.elements').reduce(function(memo){return memo + $(this).height()}, 0);
* fnReduce is called with arguments: [valueInitial, value, i, arr]
*
* created	2010-09-17
* modiffied	2013-12-09
*/

jQuery.fn.reduce = function(fnReduce, valueInitial) {
	valueInitial = valueInitial !== undefined ? valueInitial : 0
	
	jQuery(this).each(function() {
	    valueInitial = fnReduce.call(this, valueInitial);
	});
	
	return valueInitial;
};