A mixin factory for building horizontal inheritance.

mixinFactory.js

/** ****************************************
 * Utility file
 * mixin.js
 * @returns [object]
 */
function mixinFactory() {
	var len = arguments.length,
		i = 0,
		finalObj = {};
	
	function copyMethods(obj) {
		var j = 0,
			keys = Object.keys(obj),
		    len = keys.length;
				
		for (j; j < len; j++) {
			// Check if value is a function
			if (obj[keys[j]].call && obj[keys[j]].apply) {
				finalObj[keys[j]] = obj[keys[j]];
			}
		}
	}
	for (i; i < len; i++) {
		// Check if value is an object
		if (arguments[i] === Object(arguments[i])) {
			copyMethods(arguments[i]);
		}
	}
	return finalObj;
}