From: Robert Klemme <bob.news@...>
Date: 2005-02-15T01:44:58+09:00
Subject: Re: attr


"Martin DeMello" <martindemello@yahoo.com> schrieb im Newsbeitrag
news:At4Qd.388402$6l.353973@pd7tw2no...
> Zach Dennis <zdennis@mktec.com> wrote:
> >
> > I have failed to see when using three state's is needed. Could you
> > provide an example where "my_obj.a?" would behave different if
nil/false
> > meant nil/maybe ?
>
> It'd be nice to have an operator like || that only failed for nil - that
> way 'false' valued variables wouldn't be splatted by the a ||= b idiom.
>
> martin

Isn't #nil? sufficient?

foo = nil

5.times do
  foo.nil? and begin
    foo = false
    puts "changed"
  end
end

Kind regards

    robert