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From: "Óscar Fuentes" <ofv@wanadoo.es>
To: help-gnu-emacs@gnu.org
Subject: Re: (*) -> 1
Date: Tue, 17 Jan 2023 23:01:58 +0100	[thread overview]
Message-ID: <87zgagakh5.fsf@telefonica.net> (raw)
In-Reply-To: 87ilh4kgqo.fsf@web.de

Michael Heerdegen <michael_heerdegen@web.de> writes:

> Óscar Fuentes <ofv@wanadoo.es> writes:
>
>> In other programming languages an expression such as "+ 2" would yield a
>> partially applied function:
>>
>> let f = + 2
>> f 5
>> -> 7
>
> The "dual" problem can also exist in this interpretation of notation,
> though:
>
> Would a partial application of `*' to no arguments result in a function
> multiplying the product of the arguments (with 1), or would it result in
> a function raising an error?  What would this function applied to no
> arguments return?

The function either has all arguments satisfied (and then it is
computed) or not (and then it is a partially applied function). So `f'
in the previous example:

f
-> f

* 3
-> * 3

> What would the partial application of `-' to a number return when
> applied to no arguments?  Etc.

I'm not sure I understand this question. Maybe this:

let f = - 5
f 3
-> 2

or

let f = - _ 3  ;; `_' stands for "absent argument"
f 5
-> 2

The languages that use the concept of partially applied function usually
have no support for variadic functions, so the duality problem you refer
to is not an issue.




  reply	other threads:[~2023-01-17 22:01 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 [this message]
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
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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