From: "Florian Groß" <florgro@...>
Date: 2005-11-10T02:35:53+09:00
Subject: Re: memoize and yaml

Brian Buckley wrote:

> Cool.  I had been thinking I wanted to use your version of Memoize in
> conjunction with Rails' ActiveRecord::Base but ActiveRecord::Base
> requires one to 'extend' it to use it.  However it occurred to me that
> since ActiveRecord::Base does not extend anything I could just extend
> it instead of my actual class.  It seems to work.
> 
> class ActiveRecord::Base
>   extend Memoize
> end
> 
> class Foo < ActiveRecord::Base
>   def calc
>     ...
>   end
>   memoize :calc
> end

Please note that extend is not the same thing as inheriting from another 
class. You can inherit from ActiveRecord::Base and still have a 
extend(Memoize).