JavaScript模块模式，将修改后的私有变量作为公共变量获取

huangapple
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英文:

Javascript Module Pattern, get modified private variable as public

问题

Sure, here's the translated code part:

  1. 你能告诉我如何将修改后的私有变量变为公共的吗？
  3. let Module = (function(){
  4.   let privateObject = {};
  6.   function init(){
  7.     privateObject = {test:true}
  8.   }
  10.   return {
  11.     init,
  12.     privateObject
  13.   }
  14. })();
  16. Module.init();
  17. console.log(Module.privateObject);
  1. 我尝试过类似这样的方法，但我相当确定我漏掉了某些东西。
  3. let Module = (function(){
  4.   
  5.   function init(){
  6.     publicObject.privateObject.test = true;
  7.   }
  9.   let publicObject = {
  10.     privateObject: {},
  11.     init
  12.   }
  14.   return publicObject;
  15. })();
  17. Module.init();
  18. console.log(Module.privateObject); // 输出 {test: true}

注意：这里的翻译只包括代码部分，不包括问题或其他内容。

英文:

Can you tell me how to get modified private variable as public?

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

  1. let Module = (function(){
  2.   let privateObject = {};
  4.   function init(){
  5.     privateObject = {test:true}
  6.   }
  8.   return {
  9.     init,
  10.     privateObject
  11.   }
  12. })();
  14. Module.init();
  15. console.log(Module.privateObject);

<!-- end snippet -->

I've tried something like this but I am pretty sure that I'm missing something.

  1. let Module = (function(){
  2.   
  3.   function init(){
  4.     publicObject.privateObject.test = true;
  5.   }
  7.   let publicObject = {
  8.     privateObject: {},
  9.     init
  10.   }
  12.   return publicObject;
  13. })();
  15. Module.init();
  16. console.log(Module.privateObject); // gives {test: true}

答案1

得分: 1

谢谢您的评论。

我已经理解了为什么在赋新值之后
privateObject = {test:true}

Module.privateObject返回了一个空对象，因为Module.privateObject保留了对privateObject先前值的引用。感谢@jabaa

作为问题的解决方案，以下代码完美运行

  1. let Module = (function(){
  2.   let privateObject = {};
  4.   function init(){
  5.     privateObject = {test:true}
  6.   }
  8.   function getPrivate(){
  9.     return privateObject;
  10.   }
  11.   return {
  12.     init,
  13.     getPrivate
  14.   }
  15. })();
  17. Module.init();
  18. console.log(Module.getPrivate());
英文:

Thank you for your comments.

I already understand why with a new assignment of value
privateObject = {test:true}

Module.privateObject returned an empty object because Module.privateObject kept a reference to the previous value of privateObject. Thanks @jabaa

As a solution to the problem for the posterity, the following code works like a charm

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

  1. let Module = (function(){
  2.   let privateObject = {};
  4.   function init(){
  5.     privateObject = {test:true}
  6.   }
  8.   function getPrivate(){
  9.     return privateObject;
  10.   }
  11.   return {
  12.     init,
  13.     getPrivate
  14.   }
  15. })();
  17. Module.init();
  18. console.log(Module.getPrivate());

<!-- end snippet -->

huangapple
  • 本文由 发表于 2023年4月19日 22:39:49
  • 转载请务必保留本文链接：https://go.coder-hub.com/76055805.html
  • javascript
  • module-pattern
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