From: Chris Rhoden <carhoden@...>
Date: 2009-07-23T01:11:47+09:00
Subject: Re: Instantiating classes / sharing data between classes

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class Doctor
  def modalities
    @@modalities ||= your stuff
  end
end

-chris


On Wed, Jul 22, 2009 at 11:45 AM, Trevoke <trevoke@gmail.com> wrote:

> I think this is what I want to do (maybe I'm thinking about it wrong):
>
> a = Doctor.new
> b = Doctor.new
>
> I want both 'a' and 'b' to have access to:
> modalities = ['US', 'CR', 'CT', 'MR']
>
> The array 'modalities' is not hard-coded, but generated from a
> database query. I don't want to query the database every time I create
> a new instance of Doctor - so how can I do it so that every instance
> of Doctor shares the same array, only created once?
>
> Is this the part where 'modules' and 'classes' come into question and
> interact?
>
>

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