From: "Peña, Botp" <botp@...>
Date: 2004-10-12T12:42:24+09:00
Subject: Re: [Q] case based on object class

Robert Klemme [mailto:bob.news@gmx.net] wrote:

> The OO way is to use a mapping IMHO:
> 
> ACTION_MAPPING = {
>   Fixnum => lambda { puts "Fixnum" },
>   Float  => lambda { puts "Float" },
>   String => lambda { puts "String" },
> }
> 
> def myfunc(klass)
>   code = ACTION_MAPPING[klass]
>   raise ArgumentError, "Klass not found: #{klass}" unless code
>   code.call
> end
> 
> You can even define a block for the error as default 
> effectively rendering the method a one liner like this:
> 
> ACTION_MAPPING = Hash.new( lambda { raise ArgumentError, 
> "Klass not found" } ).update(
>   Fixnum => lambda { puts "Fixnum" },
>   Float  => lambda { puts "Float" },
>   String => lambda { puts "String" }
> )
> 
> def myfunc(klass) ACTION_MAPPING[klass].call end

hehe. I love posting of robert. very oo. c-oo-l.
thanks robert.

> 
> Kind regards
> 
>     robert

kind regards -botp