From: WATARU Inamori <thh@...>
Date: 2003-02-16T20:14:03+09:00
Subject: Re: Local variables & blocks


----- Original Message ----- 
From: "Jim Weirich" <jweirich@one.net>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Tuesday, February 04, 2003 9:39 PM
Subject: Re: Local variables & blocks


> On Tue, 2003-02-04 at 05:01, Pit Capitain wrote:
> > Hi Jim,
> > 
> > thanks for the weird Y fun :-)
> > 
> > Isn't your weird the same as
> > 
> >   def weird
> >     x = nil
> >     [proc {x}, proc {|v| x=v}]
> >   end
> > 
> > and wouldn't this work under the new rules, too?
> 
> Yes, it is the same.  While thinking about the proposed rules for block
> and local scope, I was just struck by the weird symmetry between {x} and
> {|x|}.
> 
> And while we have mentioned the new scoping rules, I think the new 
> rules are fine.  They are simplier and more regular than the existing
> rules.  Its a little odd to declare block local varaibles using the
> "local" trick, but then it kinda neat that the language can handle that
> as well without any special rules.
> 
> -- 
> -- Jim Weirich     jweirich@one.net    http://w3.one.net/~jweirich
> ---------------------------------------------------------------------
> "Beware of bugs in the above code; I have only proved it correct, 
> not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)
>