From: Jean-Hugues ROBERT <jean_hugues_robert@...>
Date: 2004-04-08T14:00:26+09:00
Subject: Re: IdentityHash, like Hash but with keys using equals? vs eql?

At 07:44 08/04/2004 +0900, you wrote:
>Jean-Hugues ROBERT <jean_hugues_robert@yahoo.com> writes:
>
> > BTW: I need that to detect "true" circular paths when walking a tree/graph.
> > Rigth now I detect false circulars when nodes' values compare equal
> > where in fact it is two different node objects (with the same "value").
>
>Can you just hash the ids?
>
>hash[obj.id] = blah
Yes !
So: an IdentityHash in ruby is just a Hash, but
with obj.object_id() in it vs the obj itself.
Makes a lot of sense.
Thanks George !

Jean-Hugues
PS: As one said, in Computer Science everything is solvable by
adding one indirection level.


-------------------------------------------------------------------------
Web:  http://hdl.handle.net/1030.37/1.1
Phone: +33 (0) 4 92 27 74 17