From: Marnen Laibow-Koser <marnen@...>
Date: 2009-11-17T22:58:06+09:00
Subject: Re: Newbie question:  Defining a numeric type

Brian Candler wrote:
> Brian Candler wrote:
>> You can still make the character objects be Comparable, if normally you 
>> want to order them by level.
> 
> ... and in this case it probably makes sense to have a to_i method.
> 
> class Character
>   def to_i
>     level
>   end
> 
>   include Comparable
>   def <=>(other)
>     to_i <=> other.to_i
>   end
> end
> 
> This allows you to say not only:
> 
>   if ogre > elf
> 
> but also:
> 
>   if ogre > 12
> 
> which I imagine would be useful. 

I don't know about you, but I'd find this confusing.  A character is not 
its level, and I think
if ogre < 12
is actually harder to understand than
if ogre.level < 12


Best,
--
Marnen Laibow-Koser
http://www.marnen.org
marnen@marnen.org
-- 
Posted via http://www.ruby-forum.com/.