如何从闭包中获取对象? [英] how to get an object from a closure?

问题描述

如何从闭包中获取对象，这让我感到困惑，这是一个问题:

How to get an object from a closure, that's confusion with me, here is the question:

var o = function () {
   var person = {
       name: 'jonathan',
       age: 24
   }
   return {
       run: function (key) {
           return person[key]
       }
   } 
}

问题:如何在不更改源代码的情况下获取原始的 person 对象.

question: How do i get original person object without changing the source code.

推荐答案

var o = function() {
  var person = {
    name: 'jonathan',
    age: 24
  }
  return {
    run: function(key) {
      return person[key]
    }
  }
}

Object.defineProperty(Object.prototype, "self", {
  get() {
    return this;
  }
});

console.log(o().run("self")); // logs the object

这可以工作，因为所有对象都继承了 Object.prototype ，因此您可以向其中插入一个getter，该方法可以通过 this 访问该对象，然后可以使用公开的运行方法来执行该吸气剂.

This works as all objects inherit the Object.prototype, therefore you can insert a getter to it, which has access to the object through this, then you can use the exposed run method to execute that getter.

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