Javascript是等于符号引用对象还是将其克隆? [英] Does Javascript equal sign reference objects or clones them?

问题描述

在MyApp.something.BigObject中，我有一个内存昂贵的对象，我喜欢这样做var theObject = MyApp.something.BigObject;.我的问题是，这会占用两倍的内存吗?

In MyApp.something.BigObject I have a memory expensive object and I like to do this var theObject = MyApp.something.BigObject;. My question is would that take up double the memory or not?

推荐答案

等号"是赋值运算符.如果RHS是对象，则将引用分配给LHS，它不会克隆或复制该对象.

The "equals sign" is the assignment operator. If the RHS is an object, then a reference is assigned to the LHS, it does not clone or copy the object.

所以给定了:

var obj = {};
var b = obj;

obj 和 b 都引用相同的对象.

both obj and b reference the same object.

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