From: "Pascal J. Bourguignon" <pjb@informatimago.com>
To: help-gnu-emacs@gnu.org
Subject: Re: why are there [v e c t o r s] in Lisp?
Date: Sat, 17 Oct 2015 17:18:55 +0200 [thread overview]
Message-ID: <876125cylc.fsf@kuiper.lan.informatimago.com> (raw)
In-Reply-To: 876126w0t8.fsf@debian.uxu
Emanuel Berg <embe8573@student.uu.se> writes:
> "Pascal J. Bourguignon" <pjb@informatimago.com>
> writes:
>
>> The essence of vector is to define a direction and
>> a magnitude. Notably for vector spaces without
>> a finite basis, V/|V| is still the direction of the
>> vector V, intrinsically (every unitary vector is
>> a distinct direction).
>
> Yes, but perhaps what Aurélien Aptel said (vectors in
> linear algebra being a tool concept to model just
> about anything) is analogous to the vectors of Elisp
> being data structures that can hold data for virtually
> any purpose? And then, why aren't the Elisp vectors
> simply called "arrays" like everywhere else?
Because everybody else got it wrong: they don't have (multidimensional)
arrays, they only have vectors (even when they have syntactic sugar to
make vectors of vectors, they aren't arrays).
--
__Pascal Bourguignon__ http://www.informatimago.com/
“The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment.” -- Carl Bass CEO Autodesk
next prev parent reply other threads:[~2015-10-17 15:18 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-16 1:12 why are there [v e c t o r s] in Lisp? Emanuel Berg
2015-10-17 1:11 ` Aurélien Aptel
2015-10-17 4:22 ` Emanuel Berg
2015-10-17 7:58 ` Jude DaShiell
2015-10-19 16:33 ` Nick Dokos
[not found] ` <mailman.490.1445055179.7904.help-gnu-emacs@gnu.org>
2015-10-17 15:09 ` Pascal J. Bourguignon
[not found] ` <mailman.488.1445044303.7904.help-gnu-emacs@gnu.org>
2015-10-17 2:22 ` Pascal J. Bourguignon
2015-10-17 4:56 ` Emanuel Berg
2015-10-17 5:49 ` Barry Margolin
2015-10-17 15:04 ` Emanuel Berg
[not found] ` <mailman.506.1445093727.7904.help-gnu-emacs@gnu.org>
2015-10-17 15:20 ` Pascal J. Bourguignon
2015-10-17 15:38 ` Emanuel Berg
[not found] ` <mailman.511.1445095810.7904.help-gnu-emacs@gnu.org>
2015-10-17 16:01 ` Javier
2015-10-17 16:03 ` Javier
2015-10-17 16:34 ` Pascal J. Bourguignon
2015-10-17 21:18 ` Emanuel Berg
2015-10-17 16:15 ` Pascal J. Bourguignon
2015-10-17 21:37 ` Emanuel Berg
2015-10-17 15:18 ` Pascal J. Bourguignon [this message]
[not found] <mailman.428.1444957396.7904.help-gnu-emacs@gnu.org>
2015-10-16 1:51 ` Pascal J. Bourguignon
2015-10-16 2:31 ` Emanuel Berg
2015-10-16 2:29 ` Random832
2015-10-16 2:51 ` Emanuel Berg
2015-10-16 2:56 ` Random832
2015-10-16 23:30 ` Emanuel Berg
[not found] ` <mailman.482.1445037713.7904.help-gnu-emacs@gnu.org>
2015-10-17 1:55 ` Pascal J. Bourguignon
2015-10-17 4:47 ` Emanuel Berg
[not found] ` <mailman.494.1445057637.7904.help-gnu-emacs@gnu.org>
2015-10-17 15:25 ` Pascal J. Bourguignon
2015-10-17 21:12 ` Emanuel Berg
[not found] ` <mailman.519.1445115776.7904.help-gnu-emacs@gnu.org>
2015-10-18 1:08 ` Pascal J. Bourguignon
[not found] ` <mailman.432.1444964227.7904.help-gnu-emacs@gnu.org>
2015-10-16 3:57 ` Pascal J. Bourguignon
2015-10-16 4:17 ` Random832
[not found] ` <mailman.434.1444970033.7904.help-gnu-emacs@gnu.org>
2015-10-16 5:16 ` Pascal J. Bourguignon
[not found] ` <mailman.429.1444962165.7904.help-gnu-emacs@gnu.org>
2015-10-16 3:31 ` Pascal J. Bourguignon
2015-10-16 23:46 ` Emanuel Berg
[not found] ` <mailman.483.1445038647.7904.help-gnu-emacs@gnu.org>
2015-10-17 2:04 ` Pascal J. Bourguignon
2015-10-17 4:40 ` Random832
2015-10-17 5:00 ` Emanuel Berg
2015-10-17 4:40 ` Emanuel Berg
[not found] ` <mailman.491.1445056308.7904.help-gnu-emacs@gnu.org>
2015-10-17 5:53 ` Barry Margolin
2015-10-17 15:16 ` Pascal J. Bourguignon
2015-10-17 21:06 ` Emanuel Berg
[not found] ` <mailman.518.1445115463.7904.help-gnu-emacs@gnu.org>
2015-10-18 1:07 ` Pascal J. Bourguignon
2015-10-18 12:32 ` Emanuel Berg
[not found] ` <mailman.551.1445171034.7904.help-gnu-emacs@gnu.org>
2015-10-18 12:55 ` Pascal J. Bourguignon
2015-10-18 14:28 ` Emanuel Berg
2015-10-18 21:17 ` Robert Thorpe
[not found] ` <mailman.557.1445177952.7904.help-gnu-emacs@gnu.org>
2015-10-18 19:48 ` Barry Margolin
2015-10-18 21:25 ` Emanuel Berg
2015-10-18 21:39 ` Random832
2015-10-19 0:46 ` Pascal J. Bourguignon
2015-10-17 5:56 ` Barry Margolin
2015-10-17 15:06 ` Emanuel Berg
2015-10-16 13:32 ` Barry Margolin
2015-10-16 23:47 ` Emanuel Berg
[not found] <mailman.581.1445203060.7904.help-gnu-emacs@gnu.org>
2015-10-19 0:45 ` Pascal J. Bourguignon
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