JavaScript 通过function创建对象的思考

JavaScript中 function()不仅能够创建普通的函数，也可以创建复合对象（即相当于构造函数）。本文主要介绍创建复合对象的知识。

1.返回类型为单一值

		var fun1 = function() {
			return 'this is factoryServices01';
		};
		console.log(typeof fun1); //function
		console.log(typeof fun1()); //string，加括号后执行fun1函数

2.返回类型为复合对象

		var fun2 = function() {
			return {
				name: 'kancy',
				play: function() {
				    alert('hello');
				},
				address: {}
			};
		};
		console.log(typeof fun2); //function
		console.log(typeof fun2()); //object
		console.log(typeof fun2().name); //string
		//console.log(typeof fun2().name());  // 错误："Uncaught TypeError: string is not a function"
		console.log(typeof fun2().play); //function
		console.log(typeof fun2().play()); //undefined，因为没有return;但是alert正常执行
		console.log(typeof fun2().address); //object
		//console.log(typeof fun2().address());  // 错误："Uncaught TypeError: object is not a function"