From: Stefan Monnier <monnier@iro.umontreal.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: replace element in list
Date: Thu, 22 Nov 2018 08:19:49 -0500 [thread overview]
Message-ID: <jwvh8g9uu8t.fsf-monnier+gmane.emacs.help@gnu.org> (raw)
In-Reply-To: 2087821187f90948d25d93c7ea475e66@openmail.cc
> I want to share and know if there is a better way (more efficient or
> clearer) to replace something within a list (I don't know LISP).
My suggestion is to not do it:
- if you do it by modifying the list in place, it means you're using
nasty side-effects, which are better avoided when possible
(especially with lists).
- if you want to do it without side-effects, your operation will
inevitably be algorithmically inefficient because a list is not
designed for that.
-- Stefan
next prev parent reply other threads:[~2018-11-22 13:19 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-22 4:42 replace element in list 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 [this message]
[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
-- strict thread matches above, loose matches on Subject: below --
2019-09-02 9:44 Replace " Andreas Röhler
2019-09-02 10:37 ` tomas
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
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