From: dejaspam@... (Bill Atkins)
Date: 2004-05-30T02:08:38+09:00
Subject: Re: defining condititions

How about just a simple proc object?

my_set.rules = proc { !name("orange") && hasProperty("color") && 
 (hasProperty("size") || hasProperty("weight")) }

Then just do something like obj.instance_eval rules for whatever
object has the methods in your example.

Bill

Florian Weber <csshsh@structbench.com> wrote in message news:<D83A07D2-AE5C-11D8-A68B-000A95BD142E@structbench.com>...
> hi!
> 
> im trying to define a set of rules with ruby, however i cant find a more
> ruby-like way to do so..
> 
> instead of doing something like
> 
> my_set.add(NotNamedRule("orange").new)
> my_set.add(HasPropertyRule("color").new)
> my_set.add(OrRule(HasPropertyRule("size").new, 
> HasPropertyRule("weight").new))
> 
> (i know this is a horrible example. excuse the awful 'design'. its 
> justs to illustrate
> what i not wanna have ; )
> 
> i wanna do something like
> 
> my_set.rules = !name("orange") && hasProperty("color") && 
> (hasProperty("size") || hasProperty("weight"))
> 
> can anybody think of a nice way to do this?
> 
> thanks a lot for any feedback!
> 
> ciao!
> florian