如何在命名空间中创建私有变量？ [英] How to create private variables within a namespace?

问题描述

对于我的Web应用程序，我在JavaScript中创建一个命名空间，如下所示：

For my web application, I am creating a namespace in JavaScript like so:

var com = {example: {}};
com.example.func1 = function(args) { ... }
com.example.func2 = function(args) { ... }
com.example.func3 = function(args) { ... }

我也想创建私人（我知道这不是'存在于JS）命名空间变量中，但不确定使用的最佳设计模式是什么。

I also want to create "private" (I know this doesn't exist in JS) namespace variables but am not sure what's the best design pattern to use.

是否：

com.example._var1 = null;

或者设计模式是别的吗？

Or would the design pattern be something else?

推荐答案

Douglas Crockford推广所谓的模块模式您可以使用私有变量创建对象：

Douglas Crockford popularized so called Module Pattern where you can create objects with "private" variables:

myModule = function () {

        //"private" variable:
        var myPrivateVar = "I can be accessed only from within myModule."

        return  {
                myPublicProperty: "I'm accessible as myModule.myPublicProperty"
                }
        };

}(); // the parens here cause the anonymous function to execute and return

但正如你所说Javascript没有真的有私人变量，我认为这有点像一个破坏其他东西的淤泥。例如，尝试从该类继承。

But as you said Javascript doesn't truly have private variables and I think this is somewhat of a cludge, which break other things. Just try to inherit from that class, for example.

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