http://howtonode.org/object-graphs - basic explanation about object references
http://dmitrysoshnikov.com/ecmascript/javascript-the-core/ - more
correct, but harder to understand explanation.
On Mon, Jul 30, 2012 at 9:10 AM, Roly Fentanes <roly...@gmail.com> wrote:
> That's how javascript works. If you assign an object `a` to `b`, you're
> assigning the reference. You are not making a copy. If you modify one, the
> change will reflect on both since they both point to the same object.
>
>
> On Sunday, July 29, 2012 7:39:29 PM UTC-7, 软刀 wrote:
>>
>> # a.js :
>>
>> #! /usr/bin/env node
>> // coding: utf-8
>> // author: ruandao(ljy080...@gmail.com)
>>
>> var app = exports;
>> app.yaha = 'jjj';
>> app.yahajk = 'eklj';
>> app.echo = function(){
>> console.log(this.yaha);
>> };
>>
>>
>> and I run in node:
>>
>> > yan@cpu:~$ node
>> > a=require('./a');
>> { yaha: 'jjj',
>> yahajk: 'eklj',
>> echo: [Function] }
>>
>>
>>
>> but why , I never assignment app to exports , it should be undefined
>> object!
>>
>>
>> =======================================================================================================
>>
>> and again, when I wrote this:
>> # a.js :
>>
>> #! /usr/bin/env node
>> // coding: utf-8
>> // author: ruandao(ljy080...@gmail.com)
>>
>> var app = {};
>> app.yaha = 'jjj';
>> app.yahajk = 'eklj';
>> app.echo = function(){
>> console.log(this.yaha);
>> };
>> exports = app;
>>
>>
>> in node :
>>
>> > yan@cpu:~$ node
>> > a=require('./a');
>> {}
>> > var c = {};
>> undefined
>> > c.yaha = 'jjj';
>> 'jjj'
>> > c
>> { yaha: 'jjj' }
>> >
>>
>> why app's peoperties: yaha, yahajk and it's method echo lose
>>
>>
>> thanks very much!
>>
>>
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