From: <tomas@tuxteam.de>
To: help-gnu-emacs@gnu.org
Subject: Re: Replace element in list
Date: Mon, 2 Sep 2019 12:37:23 +0200 [thread overview]
Message-ID: <20190902103723.GC1466@tuxteam.de> (raw)
In-Reply-To: <6a632b18-bbd6-7096-229d-6c890b6bdb6f@easy-emacs.de>
[-- Attachment #1: Type: text/plain, Size: 515 bytes --]
On Mon, Sep 02, 2019 at 11:44:10AM +0200, Andreas Röhler wrote:
> Hi,
>
> is there a recommended way to replace element x at index i of
> somelist y by newelement?
Like this?
scheme@(guile-user)> (define lst (list-copy '(fire water air earth)))
scheme@(guile-user)> (list-set! lst 2 'mud)
$3 = mud
scheme@(guile-user)> lst
$4 = (fire water mud earth)
Note the "list-copy" above. Strange things might happen to your computer
if you try to mutate immutable data ;-D
Cheers
-- t
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 198 bytes --]
next prev parent reply other threads:[~2019-09-02 10:37 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-02 9:44 Replace element in list Andreas Röhler
2019-09-02 10:37 ` tomas [this message]
2019-09-02 10:41 ` tomas
2019-09-02 10:46 ` tomas
2019-09-02 11:03 ` Michael Heerdegen
2019-09-02 11:05 ` tomas
2019-09-02 13:38 ` Andreas Röhler
2019-09-02 13:29 ` Stefan Monnier
2019-09-02 13:43 ` tomas
2019-09-02 14:00 ` Andreas Röhler
2019-09-02 14:57 ` Stefan Monnier
2019-09-02 20:29 ` Andreas Röhler
2019-09-02 21:32 ` Stefan Monnier
2019-09-03 5:37 ` Andreas Röhler
-- strict thread matches above, loose matches on Subject: below --
2018-11-22 4:42 replace " edgar
2018-11-22 5:18 ` Eric Abrahamsen
2018-11-22 5:39 ` Drew Adams
2018-11-22 6:04 ` Eric Abrahamsen
2018-11-22 13:19 ` Stefan Monnier
[not found] ` <mailman.4442.1542892802.1284.help-gnu-emacs@gnu.org>
2018-11-23 12:05 ` Robert Munyer
2018-11-24 3:01 ` edgar
2018-11-24 5:27 ` Drew Adams
2018-11-24 7:22 ` edgar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190902103723.GC1466@tuxteam.de \
--to=tomas@tuxteam.de \
--cc=help-gnu-emacs@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).