From: Robert Klemme <bob.news@...>
Date: 2003-05-17T00:59:44+09:00
Subject: Re: State Pattern Implementation


"Simon Vandemoortele" <deliriousREMOVEUPPERCASETEXTTOREPLY@atchoo.be>
schrieb im Newsbeitrag news:987xa.4791$1u5.452@afrodite.telenet-ops.be...
> On Fri, 16 May 2003 at 02:59 GMT, Sacha Schlegel wrote:
> > Did look at the state pattern in "Desing Patterns, E. Gamma, R. Helm,
R.
> > Johnson, J. Vlissides, Addison-Weslay, 1995
>
> > Do YOU or anyone else have links to "implemented" ruby state pattern
> > code?
>
> Take a look at http://www.rubygarden.org/ruby?StatePattern

I'd prefer to not use the context but make the state changing methods
return the new state.  At least in this example I can't see the advantage
of the choosen implementation.  Maybe someone can shed some light in this.
(Don't have the GOF book available.)

If a state needs info about its sourroundings, maybe it would make sense
to use a binding instead, which was generated in class Client (or
Context).  Just a thought.

Regards

    robert