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From: Emanuel Berg <embe8573@student.uu.se>
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 01:30:50 +0200	[thread overview]
Message-ID: <87io66pf11.fsf@debian.uxu> (raw)
In-Reply-To: 87io67zfl0.fsf@fastmail.com

Random832 <random832@fastmail.com> writes:

> The thing is, if you can car a string people will
> wonder why you can't cdr it. And with mutable
> objects it's hard to make cdr work right. (fsvo
> "right")

You can't `car' a string or do anything with it that
requires it to be a list, because it isn't. If you try
to car it, the string will fail the `listp' test.
But because it is natural to think of strings as lists
of chars, perhaps from the C days of, say

    char *str = malloc(strlen(argv[argc - 1]));

or actually because it is normal for humans to think
of strings that way, it should be pointed out - and
now that has happened - that the "string" syntax isn't
a shorthand for creating lists of chars.

-- 
underground experts united
http://user.it.uu.se/~embe8573




  reply	other threads:[~2015-10-16 23:30 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <mailman.428.1444957396.7904.help-gnu-emacs@gnu.org>
2015-10-16  1:51 ` why are there [v e c t o r s] in Lisp? 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 [this message]
     [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
2015-10-16  1:12 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

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