From: botp <botpena@...>
Date: 2008-03-24T01:10:16+09:00
Subject: Re: Sytem hook for instance names?

On Sun, Mar 23, 2008 at 11:15 PM, Jeff Patterson
<jeff_patterson@agilent.com> wrote:
> Is there a system hook that allows a method to get an instance's symbol   from its' object id?

i do not understand what you mean by instance symbol but you can refer
fr an id back to the actual object if you want to. so but how about,

irb(main):021:0> a="testing"
=> "testing"
irb(main):022:0> x=a.object_id
=> -606066648
irb(main):023:0> ObjectSpace._id2ref(x)
=> "testing"
irb(main):024:0> ObjectSpace._id2ref(x).upcase!
=> "TESTING"
irb(main):025:0> a
=> "TESTING"
irb(main):026:0> b=Class.new
=> #<Class:0xb7bf9214>
irb(main):027:0> y=b.object_id
=> -606090998
irb(main):028:0> ObjectSpace._id2ref(y)
=> #<Class:0xb7bf9214>
irb(main):029:0> ObjectSpace._id2ref(y).class_eval "def hello; 'hello'; end"
=> nil
irb(main):031:0> b.new.hello
=> "hello"

hth.
kind regards -botp