From: Dan Zwell <dzwell@...>
Date: 2007-05-26T12:32:37+09:00
Subject: Re: Global Array?

Sy Ys wrote:
> I've got a class which calls itself several times (recursive). While
> this class is calling itself, I want it to be appending a global array (
> << ). I can't figure out how to make the array itself global, so for now
> each time the class calls itself, it creates the array anew again. Help?
> 

class Klass
   def recurse
     $klasses = Array.new  unless \
       global_variables.include?("$klasses") and $klasses.is_a?(Array)
     unless $klasses.size > 40
       k = Klass.new
       $klasses << k
       k.recurse
     end
   end
end

Note that I found the "and $klasses.is_a?(Array)" bit necessary because 
the parser seems to initialize the global array $klasses when it first 
comes across the word. Might I suggest using a class level variable 
instead (@@klasses)? It seems appropriate. They are "almost global."

Dan