From: Jim Weirich <jim@...>
Date: 2004-04-10T05:32:56+09:00
Subject: Re: Cache of objects

rolo wrote:
>>>class Thing
>>>   @cache = {}
>>>   def self.instance(name)
>>>     @cache[name] ||= new(name)
>>>   end
>>>   def initialize(name)
>>>     @name = name
>>>   end
>>>end
> 
> [rolo] There are 2 things here. one Thing object and other t1 object.
> @cache is a variable that belongs to Thing or t1?

@cache belongs to the Thing object.  Notice that is is defined in the 
class definition of Thing without being nested in a method definition. 
And it is referenced in a class method (def self.instance).

-- 
-- Jim Weirich    jim@weirichhouse.org     http://onestepback.org
-----------------------------------------------------------------
"Beware of bugs in the above code; I have only proved it correct,
not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)