副本或指向对象的指针？

问题描述

如果我在使用框架的浏览器窗口上创建一个大对象...



BLACKBOX = {}

BLACKBOX.historyobj = [];

BLACKBOX.somevariable =name

BLACKBOX.somevalue = 24

BLACKBOX.largearray = [....] ;

BLACKBOX.anotherarray = [....];

BLACKBOX.SortNumbers = function（a，b）{return（parseInt（a）-parseInt（b） ）;};

等...



每帧使用一个变量，如



var BB = window.top.BLACKBOX



每个帧中的每个BB变量现在都拥有该对象的副本并使用更多内存，

或它只是指向窗口BLACKBOX ??



我尝试过：



多年来我一直在成功使用它

但是想知道这是否消耗更多内存如果

它只是制作副本每帧中的BLACKBOX。

If I create a large object on a browser window that uses frames...

BLACKBOX={}
BLACKBOX.historyobj=[];
BLACKBOX.somevariable="name"
BLACKBOX.somevalue=24
BLACKBOX.largearray=[....];
BLACKBOX.anotherarray=[....];
BLACKBOX.SortNumbers=function(a,b){return (parseInt(a)-parseInt(b));};
etc...

and each frame uses a variable like

var BB=window.top.BLACKBOX

does each BB variable in each frame now hold a copy of the object and use more memory,
or does it just point to the window BLACKBOX??

What I have tried:

I have been using this successfully for years
but wonder if this is consuming more memory if
it is just making copies of the BLACKBOX in each frame.

推荐答案

var o1 = {"name": "o1"};
var o2 = o1;
var o3 = o1.assign({}, o1);

o2.name = "o2";
o3.name = "o3";

检查 o1 ， o2 和 o3 最后......你有答案......

Check o1, o2 and o3 at the end... you have your answer there...

这篇关于副本或指向对象的指针？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！