我的函数链之演变

最易读版

function chain(obj){
	function fun(){
		if (arguments.length == 0){
			return fun.obj;
		}
		var methodName = arguments[0], methodArgs = [].slice.call(arguments,1);
		fun.obj[methodName].apply(fun.obj,methodArgs);
		return fun;
	}
	fun.obj = obj;
	return fun;
}

易读版

function chain(obj){
	return function(){
		var Self = arguments.callee; Self.obj = obj;
		if(arguments.length==0){
			return Self.obj;
		} 	
		var methodName = arguments[0], methodArgs = [].slice.call(arguments,1);
		Self.obj[methodName].apply(Self.obj,methodArgs);
		return Self;
	}
}

精简版

/**
 * chain 精简版
 * @param {Object} obj
 */
function chain(obj) {
	var slice = [].slice
	return function() {
		var Self = arguments.callee
		var Self.obj = obj
		if (arguments.length === 0) {
			return Self.obj
		} 
		Self.obj[arguments[0]].apply(Self.obj, slice.call(arguments, 1))
		return Self
	}
}

调用

chain(obj) 
	(method1,arg1)
	(method2,arg2)
	(method3,arg3)
	...