From: jmay <jason.may@...>
Date: 2007-03-21T06:40:07+09:00
Subject: Re: Defining my own class of unique objects

On Mar 20, 12:44 pm, ara.t.how...@noaa.gov wrote:
> On Wed, 21 Mar 2007, jmay wrote:
> > Hi-
>
> > I'm trying to define a class with semantics similar to Fixnum, where every
> > object is unique.  Each object has some internal state, more complex that a
> > single numeric value.  Also, I want this to work across marshalling and
> > YAML.load.  Semantics like this:
>
> > Foo.new("stuff").object_id == Foo.new("stuff").object_id
>
> you can do this using
>
>    http://raa.ruby-lang.org/project/multiton/
>

Multiton is exactly what I want.  Thanks Ara!

To get it to work with YAML I needed to add a yaml_as declaration and
define self#yaml_new in my class, and that seems to have worked.  I'm
not entirely satisfied with this solution, since it might break on
subclasses, but it's good for now.

Cheers,
-Jason