From: exiquio <exiquio@...>
Date: 2008-11-11T06:57:36+09:00
Subject: Re: Look up objects by object_id

On Nov 10, 4:30 pm, Brian Candler <b.cand...@pobox.com> wrote:
> exiquio wrote:
> > So ruby objects have an object_id. What is the intended purpose of
> > these unique identifiers? Is their a method that allows one to
> > retrieve a object by object_id? Thanks in advanced.
>
> The object_id is an encoded version of the object reference and class.
> For certain classes (e.g. Fixnum) you can decode the actual value. For
> other classes it encodes the memory address where the object data
> structure can be found.
>
> If two object references have the same object_id, then they are the same
> object.
>
> As for retrieving by object_id, see ObjectSpace._id2ref(ref). There are
> practical examples in drb/drb.rb and weakref.rb in the standard library
> that you can look at.
> --
> Posted viahttp://www.ruby-forum.com/.

thanks for the help