From: Stefan Monnier <monnier@iro.umontreal.ca>
Subject: Re: replacing a certain element in a list with another
Date: Tue, 30 Sep 2003 15:47:01 GMT [thread overview]
Message-ID: <jwvfziegu5f.fsf-monnier+gnu.emacs.help@vor.iro.umontreal.ca> (raw)
In-Reply-To: 3F79A1AA.5040008@yahoo.com
> Well, it depends on whether the OP wants to return a new list or to modify
> the original list.
That's exactly what was meant by "have good reasons to do it". Mixing the
in-place-update style with the create-new-stuff style (aka imperative style
vs functional style) is a common source of error because it generally makes
the code more "subtle" (more difficult to understand). Since elisp usually
copies things around, inplace-update operations such as nconc, nreverse,
setcar, setcdr, delete, delq, ... should be used with caution.
Stefan
next prev parent reply other threads:[~2003-09-30 15:47 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-30 8:38 replacing a certain element in a list with another Klaus Berndl
2003-09-30 9:05 ` David Kastrup
2003-09-30 9:59 ` Klaus Berndl
2003-09-30 10:03 ` David Kastrup
2003-09-30 10:19 ` Klaus Berndl
2003-09-30 12:12 ` Pascal Bourguignon
2003-09-30 14:14 ` Stefan Monnier
2003-09-30 14:26 ` Klaus Berndl
2003-09-30 14:16 ` Stefan Monnier
2003-09-30 14:28 ` Klaus Berndl
2003-09-30 15:03 ` Stefan Monnier
2003-09-30 15:30 ` Kevin Rodgers
2003-09-30 15:47 ` Stefan Monnier [this message]
2003-09-30 18:27 ` Roland Winkler
2003-09-30 20:01 ` Barry Margolin
2003-10-16 20:52 ` Kai Grossjohann
2003-10-22 20:06 ` Roland Winkler
2003-10-22 20:32 ` Barry Margolin
2003-10-23 12:46 ` Roland Winkler
2003-10-23 14:25 ` Stefan Monnier
2003-10-23 15:30 ` Kevin Rodgers
2003-10-23 15:18 ` Barry Margolin
2003-10-23 22:03 ` Roland Winkler
2003-10-23 22:20 ` Barry Margolin
2003-10-24 12:02 ` Roland Winkler
2003-10-24 15:06 ` Barry Margolin
2003-10-25 11:25 ` Oliver Scholz
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=jwvfziegu5f.fsf-monnier+gnu.emacs.help@vor.iro.umontreal.ca \
--to=monnier@iro.umontreal.ca \
/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).