From: Andreas Eder <a_eder_muc@web.de>
To: Anders Munch <ajm@flonidan.dk>
Cc: "help-gnu-emacs@gnu.org" <help-gnu-emacs@gnu.org>
Subject: Re: [External] : Re: How to make M-x TAB not work on (interactive) declaration?
Date: Mon, 16 Jan 2023 18:40:07 +0100 [thread overview]
Message-ID: <87r0vuidjc.fsf@eder.anydns.info> (raw)
In-Reply-To: <Y8VvhP4uU0AnRG3F@protected.localdomain> (Jean Louis's message of "Mon, 16 Jan 2023 18:38:44 +0300")
On Mo 16 Jan 2023 at 18:38, Jean Louis <bugs@gnu.support> wrote:
> * Anders Munch <ajm@flonidan.dk> [2023-01-16 13:58]:
>> Jean Louis wrote:
>> > I actually expect function to tell me wrong number of arguments or no arguments, as I find it safer for programming that way.
>>
>> It makes sense for
>> (+)
>> to be an error, if it's written like that.
>> But if the code goes
>> (apply #'+ a-list-of-numbers)
>> then a-list-of-numbers being empty is normal and expected, and 0 is invariably the desired result.
>> You can't make the former an error without the latter becoming an error as well, so it isn't.
>
> (apply #'+ nil) that is what you mean why is it usable?
>
> than this is disaster:
>
> (apply #'* nil) ➜ 1
>
> Do you wish to say that `apply' function is reason for this below?
>
> (*) ➜ 1 and
> (+) ➜ 0 and
> (-) ➜ 0
>
> Maybe you know some reference to Lisp beginning why is it so?
See http://www.lispworks.com/documentation/HyperSpec/Body/f_pl.htm for
#'+ and http://www.lispworks.com/documentation/HyperSpec/Body/f_st.htm
for #'*.
'Andreas
next prev parent reply other threads:[~2023-01-16 17:40 UTC|newest]
Thread overview: 149+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-07 20:53 How to make M-x TAB not work on (interactive) declaration? Jean Louis
2023-01-07 21:11 ` Ruijie Yu via Users list for the GNU Emacs text editor
2023-01-07 23:40 ` Jean Louis
2023-01-08 6:06 ` Eli Zaretskii
2023-01-08 6:19 ` Emanuel Berg
2023-01-09 4:49 ` Jean Louis
2023-01-09 6:26 ` algorithmic Lisp language (was: Re: How to make M-x TAB not work on (interactive) declaration?) Emanuel Berg
2023-01-09 19:30 ` Jean Louis
2023-01-09 19:32 ` Jean Louis
2023-01-08 6:21 ` How to make M-x TAB not work on (interactive) declaration? Jean Louis
2023-01-08 6:32 ` Emanuel Berg
2023-01-08 10:38 ` Eli Zaretskii
2023-01-08 8:34 ` Tassilo Horn
2023-01-08 11:01 ` Eli Zaretskii
2023-01-09 13:29 ` Tassilo Horn
2023-01-08 21:35 ` Jean Louis
2023-01-08 22:35 ` [External] : " Drew Adams
2023-01-09 0:24 ` Emanuel Berg
2023-01-09 19:47 ` Jean Louis
2023-01-10 23:28 ` Emanuel Berg
2023-01-13 6:21 ` (*)->1 Jean Louis
2023-01-14 12:03 ` (*)->1 Michael Heerdegen
2023-01-14 12:33 ` (*)->1 Michael Heerdegen
2023-01-15 20:18 ` [External] : Re: How to make M-x TAB not work on (interactive) declaration? Rudolf Adamkovič
2023-01-15 20:57 ` Jean Louis
2023-01-15 22:33 ` Drew Adams
2023-01-15 23:10 ` Emanuel Berg
2023-01-16 15:28 ` Jean Louis
2023-01-16 17:07 ` Drew Adams
2023-01-16 18:25 ` Jean Louis
2023-01-17 2:20 ` Drew Adams
2023-01-17 5:28 ` tomas
2023-01-17 22:20 ` Drew Adams
2023-01-18 5:14 ` tomas
2023-01-18 5:26 ` Emanuel Berg
2023-01-19 11:38 ` tomas
2023-01-19 11:51 ` Emanuel Berg
2023-01-21 14:05 ` tomas
2023-01-23 10:14 ` Robert Pluim
2023-01-23 16:44 ` Michael Heerdegen
2023-01-23 19:28 ` tomas
2023-01-18 17:27 ` Drew Adams
2023-01-18 17:32 ` tomas
2023-01-18 14:32 ` Jean Louis
2023-01-18 20:36 ` Drew Adams
2023-01-19 9:05 ` (*) -> 1 Jean Louis
2023-01-19 9:41 ` Yuri Khan
2023-01-19 12:52 ` Anders Munch
2023-01-17 5:35 ` [External] : Re: How to make M-x TAB not work on (interactive) declaration? Jean Louis
2023-01-17 15:59 ` Yuri Khan
2023-01-17 16:42 ` Jean Louis
2023-01-17 16:05 ` Michael Heerdegen
2023-01-17 16:17 ` Yuri Khan
2023-01-17 16:25 ` tomas
2023-01-17 16:55 ` (*) -> 1 Jean Louis
2023-01-17 17:52 ` Michael Heerdegen
2023-01-17 18:11 ` Óscar Fuentes
2023-01-17 18:40 ` Jean Louis
2023-01-17 19:04 ` Óscar Fuentes
2023-01-18 13:15 ` Jean Louis
2023-01-18 14:37 ` Óscar Fuentes
2023-01-18 18:17 ` [External] : " Drew Adams
2023-01-17 19:35 ` Michael Heerdegen
2023-01-17 21:12 ` Michael Heerdegen
2023-01-17 22:01 ` Óscar Fuentes
2023-01-17 23:38 ` Michael Heerdegen
2023-01-18 7:50 ` Óscar Fuentes
2023-01-18 8:37 ` tomas
2023-01-18 12:46 ` Óscar Fuentes
2023-01-18 13:44 ` Michael Heerdegen
2023-01-18 14:07 ` Óscar Fuentes
2023-01-18 16:19 ` Andreas Eder
2023-01-18 17:14 ` Óscar Fuentes
2023-01-17 18:18 ` Jean Louis
2023-01-17 11:52 ` [External] : Re: How to make M-x TAB not work on (interactive) declaration? Michael Heerdegen
2023-01-15 21:08 ` Jean Louis
2023-01-16 5:02 ` Emanuel Berg
2023-01-16 5:38 ` tomas
2023-01-16 10:10 ` Jean Louis
2023-01-16 10:41 ` Yuri Khan
2023-01-16 15:26 ` Jean Louis
2023-01-17 4:06 ` Emanuel Berg
2023-01-17 14:00 ` tomas
2023-01-17 22:43 ` Emanuel Berg
2023-01-17 16:25 ` Nick Dokos
2023-01-17 17:19 ` Jean Louis
2023-02-11 4:38 ` Ruijie Yu via Users list for the GNU Emacs text editor
2023-02-11 10:54 ` Jean Louis
2023-01-17 17:41 ` Nick Dokos
2023-01-16 7:55 ` Yuri Khan
2023-01-16 10:16 ` Jean Louis
2023-01-16 10:37 ` Yuri Khan
2023-01-16 15:35 ` Jean Louis
2023-01-16 15:59 ` Yuri Khan
2023-01-16 16:14 ` Jean Louis
2023-01-16 16:47 ` tomas
2023-01-16 17:07 ` Drew Adams
2023-01-16 18:41 ` Jean Louis
2023-01-16 10:51 ` Anders Munch
2023-01-16 15:38 ` Jean Louis
2023-01-16 17:40 ` Andreas Eder [this message]
2023-01-16 18:17 ` tomas
2023-01-16 18:55 ` Jean Louis
2023-01-16 19:14 ` tomas
2023-01-16 18:46 ` Jean Louis
2023-01-17 2:37 ` Eduardo Ochs
2023-01-17 5:46 ` (*) -> 1 Jean Louis
2023-01-17 15:56 ` Michael Heerdegen
2023-01-17 16:29 ` Jean Louis
2023-01-17 16:43 ` tomas
2023-01-17 17:25 ` Jean Louis
2023-01-17 19:11 ` Nick Dokos
2023-01-17 17:17 ` Michael Heerdegen
2023-01-17 17:26 ` Jean Louis
2023-01-17 18:46 ` Michael Heerdegen
2023-01-17 18:51 ` Jean Louis
2023-01-17 18:04 ` Jean Louis
2023-01-17 18:28 ` Eduardo Ochs
2023-01-17 19:18 ` Michael Heerdegen
2023-01-18 12:27 ` Jean Louis
2023-01-18 13:37 ` Michael Heerdegen
2023-01-19 8:20 ` Jean Louis
2023-01-19 10:06 ` Tassilo Horn
2023-01-19 13:43 ` Michael Heerdegen
2023-01-19 14:42 ` Jean Louis
2023-01-19 15:27 ` tomas
2023-01-18 13:57 ` Óscar Fuentes
2023-01-19 8:32 ` Jean Louis
2023-01-19 16:51 ` Óscar Fuentes
2023-01-20 8:01 ` Jean Louis
2023-01-18 14:25 ` Michael Heerdegen
2023-01-19 8:34 ` Jean Louis
2023-01-19 13:54 ` Michael Heerdegen
2023-01-19 14:54 ` Jean Louis
2023-01-19 15:19 ` Tassilo Horn
2023-01-19 15:46 ` Michael Heerdegen
2023-01-19 17:38 ` Dr Rainer Woitok
2023-01-20 7:31 ` Jean Louis
2023-01-20 11:49 ` Dr Rainer Woitok
2023-01-19 17:44 ` [External] : " Drew Adams
2023-01-19 21:29 ` Michael Heerdegen
2023-01-20 7:40 ` Jean Louis
2023-01-20 8:47 ` Emanuel Berg
2023-01-18 9:02 ` Anders Munch
2023-01-18 10:49 ` Michael Heerdegen
2023-01-18 11:10 ` Emanuel Berg
2023-01-18 12:48 ` Eli Zaretskii
2023-01-18 14:29 ` Michael Heerdegen
[not found] ` <87k01lica7.fsf@eder.anydns.info>
2023-01-17 16:04 ` Jean Louis
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