From: Emanuel Berg <embe8573@student.uu.se>
To: help-gnu-emacs@gnu.org
Subject: Re: `append' vs. `nconc'
Date: Fri, 01 Jan 2016 14:23:26 +0100 [thread overview]
Message-ID: <87lh89tovl.fsf@debian.uxu> (raw)
In-Reply-To: 87wprucrlz.fsf@mithlond.arda
Teemu Likonen <tlikonen@iki.fi> writes:
> LIST function creates a fresh list when it is
> evaluated, usually at runtime. The following applies
> to the Common Lisp language: Literal objects created
> with ' ` (QUOTE ...) "string" etc. might be created
> at compile time. Such objects might even be shared
> by all instances of such literal object. Common Lisp
> compilers are allowed to do that. So, the literal
> list '(a b c) in one place might actually become the
> very same (as in EQ) object as literal '(a b c) in
> somewhere else. If you mutate one object the results
> may show everywhere, which is not usually wanted.
>
> Even though it may not apply to Emacs Lisp or all
> Common Lisp compilers it's good habit to not mutate
> literally created objects. Be functional with them!
OK, then what functions, other than `nconc', are
mutators (or, how do you now)?
--
underground experts united
http://user.it.uu.se/~embe8573
next prev parent reply other threads:[~2016-01-01 13:23 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-28 16:35 Error: Setting the shell in sh-mode via a local variable does not work Johannes Kastl
2015-12-29 1:32 ` Emanuel Berg
2015-12-29 18:33 ` Johannes Kastl
2015-12-30 14:53 ` Emanuel Berg
2015-12-30 15:15 ` Robert Thorpe
2015-12-30 15:30 ` Emanuel Berg
2015-12-30 17:42 ` Johannes Kastl
2015-12-30 15:19 ` Teemu Likonen
2015-12-30 15:41 ` `append' vs. `nconc' (was: Re: Error: Setting the shell in sh-mode via a local variable does not work) Emanuel Berg
2015-12-30 16:37 ` `append' vs. `nconc' Teemu Likonen
2015-12-31 3:37 ` Emanuel Berg
[not found] ` <mailman.1400.1451533083.843.help-gnu-emacs@gnu.org>
2015-12-31 3:45 ` Pascal J. Bourguignon
2015-12-31 4:00 ` Emanuel Berg
2015-12-31 9:22 ` tomas
2015-12-31 18:48 ` Emanuel Berg
[not found] ` <mailman.1402.1451534421.843.help-gnu-emacs@gnu.org>
2015-12-31 5:36 ` Pascal J. Bourguignon
2015-12-31 3:50 ` Emanuel Berg
[not found] ` <mailman.1401.1451533833.843.help-gnu-emacs@gnu.org>
2015-12-31 5:37 ` Pascal J. Bourguignon
2015-12-31 7:13 ` Emanuel Berg
2015-12-31 9:30 ` tomas
2015-12-31 17:56 ` side effects, list sharing [was: `append' vs. `nconc'] Drew Adams
2015-12-31 19:00 ` Emanuel Berg
2015-12-31 19:15 ` Drew Adams
2016-01-01 13:20 ` Emanuel Berg
2015-12-31 18:51 ` `append' vs. `nconc' Emanuel Berg
[not found] ` <mailman.1440.1451588113.843.help-gnu-emacs@gnu.org>
2016-01-01 2:53 ` Barry Margolin
2016-01-01 13:26 ` Emanuel Berg
[not found] ` <mailman.1406.1451546036.843.help-gnu-emacs@gnu.org>
2015-12-31 8:54 ` Pascal J. Bourguignon
2015-12-31 7:31 ` Teemu Likonen
2015-12-31 18:35 ` Emanuel Berg
2015-12-31 20:04 ` Teemu Likonen
2016-01-01 13:23 ` Emanuel Berg [this message]
2016-01-01 14:02 ` Teemu Likonen
2016-01-01 18:31 ` Emanuel Berg
[not found] ` <mailman.1438.1451586967.843.help-gnu-emacs@gnu.org>
2016-01-01 6:25 ` Pascal J. Bourguignon
2016-01-01 13:31 ` Emanuel Berg
2016-01-01 15:04 ` Drew Adams
[not found] ` <mailman.1353.1451490125.843.help-gnu-emacs@gnu.org>
2015-12-30 16:18 ` Pascal J. Bourguignon
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