你可以将实例命名为与构造函数名称相同吗？

Question

你可以将实例命名为与构造函数名称相同吗？

var myFunc = new function myFunc(){};

？

看起来,这将使用新实例替换Function对象...这意味着这是一个很好的Singleton.

我没有看到有人使用这个,所以我想,这有些缺点,我不知道...

有什么想法吗？

Answer 1

YES...

However, it does look weird that you're creating a named function but never refer to it by name.

The more common pattern(s) I've seen are

function MyClass(){
    this.val = 5;
};
MyClass.prototype.getValue = function() {
    return this.val;
}
MyClass = new MyClass();

But when people do that I wonder why they don't just use a literal object

var MyClass = {
    val: 5,
    getValue: function() {
        return this.val;
    }
}

And I would even prefer to use the module pattern here

var MyClass = (function(){
    var val = 5;
    return {
        getValue: function() {
            return val;
        }
    };     
})();

Disclaimer

Now whether the singleton pattern should be used, that's another question (to which the answer is NO if you care about testing, dependency management, maintainability, readability)

• http://accu.org/index.php/journals/337
• 为什么在 Java 代码中实现单例模式（有时）被认为是 Java 世界中的反模式？