From: Francis Cianfrocca <garbagecat10@...>
Date: 2006-05-23T06:57:38+09:00
Subject: Re: initializing instance variables in a module

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We've definitely wandered into one of Ruby's darker, mustier corners. None
of these solutions really sing.

On 5/22/06, ara.t.howard@noaa.gov <ara.t.howard@noaa.gov> wrote:
>
> On Tue, 23 May 2006, Francis Cianfrocca wrote:
>
> > Looks promising but what if you have to assign to the variable? This
> code
> > throws an exception:
> >
> > module Mixin
> > def myvar
> >   @myvar ||=3D 100
> >   @myvar
> > end
> >
> > def inc_myvar
> >   myvar +=3D 1
> > end
> > end
> >
> > class Klass
> > include Mixin
> > end
> >
> > Klass.new.inc_myvar
>
>    harp:~ > cat a.rb
>    require 'traits'
>
>    module Mixin
>      trait 'myvar' =3D> 100
>
>      def inc_myvar() myvar( myvar + 1) end
>    end
>
>    class Klass
>      include Mixin
>    end
>
>    p Klass.new.inc_myvar
>
>
>    harp:~ > ruby a.rb
>    101
>
>
>
>
> -a
> --
> be kind whenever possible... it is always possible.
> - h.h. the 14th dali lama
>
>

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