gistfile1.js

/**
 * Apply an object's prototype as a mixin to another object's prototype
 * @param  {Object} destination The class to mix in to
 * @param  {(Object|Array)} source An object or array of objects to mix in
 */
function mixIn(destination, source)
{
	if (typeof source !== TYPE_OF_ARRAY)
	{
		$.extend(destination.prototype, source.prototype);
		return;
	}

	var len = source.length;

	if (!len)
	{
		return;
	}

	var arr = new Array(len + 1);
	arr[0] = destination.prototype;
	for (var i = 1; i < len; i++)
	{
		arr[i] = source[i].prototype;
	}

	$.extend.apply($, arr);
}