From: Patrick Gundlach <clr10.10.randomuser@...>
Date: 2005-12-09T02:07:42+09:00
Subject: Re: They say I write Ruby like Perl


[...]

>  > @parent = nil
>  > @prevsibling = nil
>  > @nextsibling = nil
>  > @firstchild = nil
>  > @lastchild = nil
> Variables are created when they're first referenced, and are `nil' by
> default, so these lines make no difference.

mostly right, but here is one exception:

#!/opt/ruby/1.8/bin/ruby -w

if @foo==:bar
  puts "hello"
end

gives a warning.

Patrick

(and there is another exception that vnpenguin@gmail recently came across)