From: Maciej Sobczak <see.my.homepage@gmail.com>
Subject: Re: Derived private interface
Date: Sat, 23 Jul 2011 02:29:51 -0700 (PDT)
Date: 2011-07-23T02:29:51-07:00 [thread overview]
Message-ID: <5035ab5f-a402-4044-8fec-1dbbfbadd26a@h17g2000yqn.googlegroups.com> (raw)
In-Reply-To: j0e0l1$5qh$1@tornado.tornevall.net
On Jul 23, 9:30 am, Jeffrey Carter
<spam.jrcarter....@spam.not.acm.org> wrote:
> The equivalent of dispatching in programming by composition is a subprogram that
> contains a case statement that contains calls to other subprograms.
The whole point of dispatching is to allow the open-closed principle:
http://en.wikipedia.org/wiki/Open/closed_principle
It has no direct equivalent in programming by composition.
> No
> access-to-subprogram values involved.
Access-to-subprogram is needed to emulate dispatching and provide the
open-closed principle at the same time.
> It does the exact same thing as
> dispatching, except that it's easier to read and understand and doesn't result
> in large numbers of "what am I doing wrong?"
Without dispatching (and without access-to-subprogram to emulate it)
you would have large number of "why should I modify half of my drawing
application code just because I have added a rectanlge-with-rounde-
corners".
--
Maciej Sobczak * http://www.msobczak.com * http://www.inspirel.com
next prev parent reply other threads:[~2011-07-23 9:29 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-05 3:14 Derived private interface Rego, P.
2011-07-05 5:10 ` AdaMagica
2011-07-06 2:24 ` Rego, P.
2011-07-06 4:34 ` AdaMagica
2011-07-06 7:55 ` Georg Bauhaus
2011-07-06 8:30 ` AdaMagica
2011-07-06 12:59 ` Georg Bauhaus
2011-07-06 13:23 ` AdaMagica
2011-07-06 19:06 ` Randy Brukardt
2011-07-06 13:28 ` Simon Wright
2011-07-06 19:45 ` Randy Brukardt
2011-07-06 22:05 ` Georg Bauhaus
2011-07-06 23:56 ` Adam Beneschan
2011-07-07 14:09 ` Georg Bauhaus
2011-07-07 15:10 ` Adam Beneschan
2011-07-08 4:29 ` AdaMagica
2011-07-08 19:08 ` Randy Brukardt
2011-07-08 19:12 ` Randy Brukardt
2011-07-07 15:19 ` Georg Bauhaus
2011-07-07 10:37 ` Stephen Leake
2011-07-07 13:18 ` Georg Bauhaus
2011-07-08 19:23 ` Randy Brukardt
2011-07-08 21:41 ` Jeffrey Carter
2011-07-09 6:14 ` Dmitry A. Kazakov
2011-07-22 22:59 ` Randy Brukardt
2011-07-23 7:30 ` Jeffrey Carter
2011-07-23 9:29 ` Maciej Sobczak [this message]
2011-07-23 10:07 ` Dmitry A. Kazakov
2011-07-26 21:04 ` Randy Brukardt
2011-07-26 23:43 ` Jeffrey Carter
2011-07-27 23:56 ` Randy Brukardt
2011-07-28 0:18 ` Jeffrey Carter
2011-07-28 10:06 ` Maciej Sobczak
2011-07-28 23:24 ` Randy Brukardt
2011-07-29 6:45 ` Simon Wright
2011-07-30 0:04 ` Randy Brukardt
2011-07-30 6:32 ` Simon Wright
2011-08-01 9:30 ` Alex R. Mosteo
2011-08-01 10:12 ` Dmitry A. Kazakov
2011-08-01 21:56 ` Randy Brukardt
2011-08-02 10:03 ` Dmitry A. Kazakov
2011-08-02 21:16 ` Randy Brukardt
2011-08-03 9:01 ` Dmitry A. Kazakov
2011-08-03 20:16 ` Randy Brukardt
2011-08-04 8:15 ` Dmitry A. Kazakov
2011-08-09 21:10 ` Maciej Sobczak
2011-08-09 21:35 ` Randy Brukardt
2011-08-10 9:11 ` Dmitry A. Kazakov
2011-08-10 21:56 ` Randy Brukardt
2011-08-11 8:07 ` Dmitry A. Kazakov
2011-08-12 4:52 ` Randy Brukardt
2011-08-12 8:54 ` Dmitry A. Kazakov
2011-08-10 10:07 ` Maciej Sobczak
2011-08-10 11:26 ` Georg Bauhaus
2011-08-10 22:27 ` Randy Brukardt
2011-08-10 22:21 ` Randy Brukardt
2011-08-11 13:50 ` Maciej Sobczak
2011-08-12 4:43 ` Randy Brukardt
2011-08-12 7:00 ` Maciej Sobczak
2011-08-12 21:59 ` Randy Brukardt
2011-07-06 15:06 ` Adam Beneschan
2011-07-06 16:36 ` Dmitry A. Kazakov
2011-07-06 19:20 ` Randy Brukardt
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