From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: not null
Date: Thu, 5 Mar 2009 16:06:22 +0100
Date: 2009-03-05T16:06:22+01:00 [thread overview]
Message-ID: <1bydip4ahvzhy$.fluevvq5h3pi$.dlg@40tude.net> (raw)
In-Reply-To: j8dvq4lmb7p7hr70h7k3elqv5k8lrvjcv5@4ax.com
On Thu, 05 Mar 2009 11:32:13 +0000, Brian Drummond wrote:
> On Wed, 4 Mar 2009 17:47:03 -0800 (PST), Adam Beneschan <adam@irvine.com> wrote:
>
>>You could also make the "end of list" point to some special dummy
>>object.
>
> I don't see that as semantically different from a null pointer.
> Which perhaps just helps to make your point
Well, many lists are never empty. Such lists (single or doubly-linked) can
be made circular. This strategy has several advantages. One of them is that
null pointers are never used. (An item outside any list points to itself.)
(Granted, a wrongly implemented list iteration may cycle rather than
crash.)
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2009-03-05 15:06 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-04 14:44 not null Georg Bauhaus
2009-03-04 14:56 ` Hyman Rosen
2009-03-04 15:22 ` Georg Bauhaus
2009-03-04 16:16 ` Adam Beneschan
2009-03-05 14:24 ` Georg Bauhaus
2009-03-05 16:07 ` Adam Beneschan
2009-03-06 1:07 ` Hibou57 (Yannick Duchêne)
2009-03-04 16:09 ` Adam Beneschan
2009-03-04 20:38 ` Dmitry A. Kazakov
2009-03-05 1:54 ` Adam Beneschan
2009-03-05 8:42 ` Dmitry A. Kazakov
2009-03-05 1:32 ` Brian Drummond
2009-03-05 1:47 ` Adam Beneschan
2009-03-05 11:32 ` Brian Drummond
2009-03-05 15:06 ` Dmitry A. Kazakov [this message]
2009-03-05 13:57 ` Georg Bauhaus
2009-03-05 19:53 ` Jack Mitchell
2009-03-05 8:49 ` Jacob Sparre Andersen
2009-03-05 16:10 ` Adam Beneschan
2009-03-05 17:20 ` Jacob Sparre Andersen
2009-03-06 1:04 ` Hibou57 (Yannick Duchêne)
2009-03-06 12:01 ` Harald Korneliussen
2009-03-06 12:43 ` Jacob Sparre Andersen
2009-03-06 13:05 ` Harald Korneliussen
2009-03-06 15:21 ` Dmitry A. Kazakov
2009-03-06 16:59 ` Harald Korneliussen
2009-03-06 17:48 ` Dmitry A. Kazakov
2009-03-06 20:05 ` Georg Bauhaus
2009-03-06 21:31 ` Dmitry A. Kazakov
2009-03-04 16:19 ` Robert A Duff
2009-03-04 20:39 ` Colin Paul Gloster
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox