From: Christian Szegedy <szegedy@...>
Date: 2002-09-05T01:24:46+09:00
Subject: Re: option remember

The general solution is not much more complicated:

$arg = {}

def remember(func)
   m = method(func)
   Proc.new { |n| ($arg[m.__id__]||=[])[n] ||= m.call(n) }
end