javascript - 实现单个函数来设置和获取 JavaScript 闭包中所有私有(private)变量的值

Question

我有一个函数，它有一些变量，因为它们位于函数内部，它们是函数的本地函数，因此是私有(private)的。现在我可能有很多这样的变量，为了设置一个值并从外部获取变量值，我必须为每个私有(private)变量编写 set 和 get 。 无论如何，JavaScript 中是否有用于获取和设置所有私有(private)变量(PrivateOne 和 PrivateTwo)的通用函数。

        privateClosure = (function(){
        var PrivateOne;
        var PrivateTwo;
        setPrivate = function(VariableName,Value)
        {
        VariableName = Value;
        }
        getPrivate = function(VariableName)
        {
        return VariableName;
        }
        return{setPrivate,getPrivate};
        })();
        // I want to do something like this
        privateClosure.setPrivate(PrivateOne,10);
        privateClosure.getPrivate(PrivateOne);
        privateClosure.setPrivate(PrivateTwo,20);
        privateClosure.getPrivate(PrivateTwo);
        //Only one Function for all the private variable in closure.



    Is there anyway in javascript to have common function for getting and setting all private variable(PrivateOne and PrivateTwo).

Answer 1

您可以关闭 map :

 var data = (function(){
   var lookup = new Map();

   return {
     get(v){
       return lookup.get(v);
      },
      set(a,v){
       return lookup.set(a,v);
      }
   }
 })();

所以你可以这样做:

 data.set("a",1);
 alert( data.get("a"));