怎么知道两个javascript变量指向相同的内存地址 [英] How to know that two javascript variable point to the same memory address

问题描述

有没有办法知道2个javascript变量指向同一个内存地址？

Is there a way to know that 2 javascript variable point to the same memory address ?

var my_var = {
    id: 1,
    attribute: "myAttribute"
}

var copy = my_var;

//someting like
if(copy === my_var) return true;

推荐答案

你不能在C中使用别名变量别名在javascript中，类似

You can't alias variables like you can in C. In javascript, something like

var x = 1;
var y = x
y = 4;
// x is still 1

总是如此。

但是，对象总是通过引用传递

However, objects are always passed by reference

var x = { one: 1, two: 2 };
var y = x;
y.one = 100;
// x.one is now 100

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