javascript是通过引用还是按值处理对象？ [英] Does javascript handle objects by reference or by value?

问题描述

我有这段代码

var myObjects = {}; //global variable

//Later on in the code:
for (i in myObjects)
{
    var obj = myObjects[i];
    process(obj);
}

function process(obj)
{
    $.getJSON("example.com/process/", {id: obj.id}, function(result)
      {
          //Will the following change the permanent/global copy e.g 
          // myObjects[44] ?
          obj.addItem(result.id, result.name, result.number);
      }
    );
}

以下行：

     obj.addItem(result.id, result.name, result.number);

按值或按引用修改对象，即是否会修改<$ c $的本地副本c> obj 或者例如 myObjects [44] ？

modify the object by value or by reference, i.e will it modify the local copy of obj or e.g myObjects[44]?

如果只影响本地副本，如何更改对象的全局副本？

If it affects only the local copy, how can I have it change the global copy of the object?

推荐答案

原始变量在JavaScript中按值传递，但是对象通过引用传递。

Primitive variables are passed by value in JavaScript, but objects are passed by reference.

来源和进一步阅读：

• < a href =http://snook.ca/archives/javascript/javascript_pass =nofollow noreferrer> JavaScript：按值或按引用传递

• JavaScript: Passing by Value or by Reference

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