Function.prototype.kwargs

gistfile1.js

Function.prototype.kwargs = function()
{
	var argNames, kwargs, args = [], thisObject;

	for (var i=0; i<arguments.length; i++){
		var obj = arguments[i];
		if (Object(obj) !== obj){
			continue;
		}
		for (var key in obj){
			var index;
			if (key === "this"){
				thisObject = obj[key];
				continue;
			}
			if (isFinite(key)){
				index = key;
			} else {
				argNames = argNames || Function.prototype.toString.call(this).match(/\((\s*.*?\s*)\)/)[1].split(/,\s*/);
				index = argNames.indexOf(key);
				if (index === -1){
					kwargs = kwargs || {};
					kwargs[key] = obj[key];
					continue;
				}
			}
			args[index] = obj[key];
		}
	}
	if (kwargs){
		args.length = Math.max(args.length, argNames.length, this.length);
		args.push(kwargs);
	}
	this.apply(thisObject, args);
};