From: dblack@...
Date: 2003-05-09T09:01:35+09:00
Subject: Re: Can a global be a constant?

Hi --

On Fri, 9 May 2003, Jim Freeze wrote:

> On Friday,  9 May 2003 at  8:16:04 +0900, dblack@superlink.net wrote:
> > Hi --
> >
> > Would this be suitable?
> >
> >   class App
> >     class << self
> >       attr_reader :state
> >     end
> >     State = Struct.new(:debug, :verbose)
> >     @state = State.new(true, false)
> >     def main
> >       Work.new
> >     end
> >   end
> >
> >   class Work
> >     def initialize
> >       puts App.state.debug
> >     end
> >   end
> >
> >   App.new.main
>
>
> Close.
> Now, realize, I'm just now learning about this
> weird class << self stuff. Is that just a fancy
> way of doing:
>   class App
>     def self.state; @state; end
>   end

No, it's actually a simpler way :-)  (using attr_reader instead of
writing the method manually)


David

-- 
David Alan Black
home: dblack@superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav