From: Kyle Rawlins <rawlins@...>
Date: 2002-06-12T01:29:24+09:00
Subject: Re: Composite classes - how to?


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On Tue, Jun 11, 2002 at 11:06:34PM +0900, Serg Koren wrote:
> Class X
>   def myX
>   End
> End
>=20
> Class Y
>   myNest =3D X::new
> =20
>   def myY
>   end
> end
>=20
> myObject =3D Y::new
>=20
> myObject::myNest.myX       #  <------  gives an error
>=20
> What's the proper way of doing this in Ruby? =20

myNest in your code isn't visable externally to the area of the class (it i=
s I
guess a local variable).  If you want it to be a constant (in which case it
would be visible) capitalize the first character of its name.  If you want =
it
to be an instance variable do this:

class Y
    attr_reader :myNest
    def initialize()
        @myNest =3D X.new
    end
end

then the call that you have above should work.

-kyle

--=20
http://mas.cs.umass.edu/~rawlins
--
the pieces of the puzzle are waiting the water of the dark boats

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