From: Michael Heerdegen <michael_heerdegen@web.de>
To: Heime <heimeborgia@protonmail.com>
Cc: Heime via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org>
Subject: Re: Easy to add with push but not to the end of a list
Date: Wed, 30 Nov 2022 18:10:22 +0100 [thread overview]
Message-ID: <877czcid1d.fsf@web.de> (raw)
In-Reply-To: <KXjzLfrdDuwixRMdtIXYxFcqR6ZKF55Z75DDN05YJTKyVz6dZLEadKUfNSMdD8dn6aoQqn5HCeH5OZXjD4V4u5Il3DOJlQ9v14KCC2AuLC0=@protonmail.com> (Heime's message of "Mon, 28 Nov 2022 02:26:20 +0000")
Heime <heimeborgia@protonmail.com> writes:
> Although it is easy to add to a list using push, it currently looks
> hideous to be able to add to the end of a list.
In addition to what has already been said: if you store and update the
last cdr of your list (in a variable for example), you can add something
to the end of the list in O(1). The cost is the cost of maintaining
additional data.
Michael.
next prev parent reply other threads:[~2022-11-30 17:10 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-28 2:26 Easy to add with push but not to the end of a list Heime
2022-11-28 2:43 ` [External] : " Drew Adams
2022-11-28 3:45 ` Heime
2022-11-28 6:11 ` Drew Adams
2022-11-28 20:00 ` Emanuel Berg
2022-11-28 5:18 ` Stefan Monnier via Users list for the GNU Emacs text editor
2022-11-28 20:19 ` Emanuel Berg
2022-11-28 21:56 ` [External] : " Drew Adams
2022-11-28 22:45 ` Emanuel Berg
2022-11-28 22:01 ` Heime
2022-11-28 22:24 ` Stefan Monnier via Users list for the GNU Emacs text editor
2022-11-28 22:58 ` Emanuel Berg
2022-11-30 14:10 ` tomas
2022-11-30 16:12 ` Emanuel Berg
2022-11-28 22:46 ` Emanuel Berg
2022-11-28 22:50 ` Emanuel Berg
2022-11-29 5:23 ` tomas
2022-11-29 5:32 ` Emanuel Berg
2022-11-29 7:56 ` Heime
2022-11-29 8:33 ` Marcin Borkowski
2022-11-29 10:00 ` Emanuel Berg
2022-11-29 10:05 ` Emanuel Berg
2022-11-29 10:15 ` Heime
2022-11-29 8:38 ` tomas
2022-11-29 9:54 ` Emanuel Berg
2022-11-29 8:17 ` Marcin Borkowski
2022-11-29 8:44 ` tomas
2022-11-29 12:08 ` Dr Rainer Woitok
2022-11-29 19:54 ` Of cars and mice [was: Easy to add with push but not to the end of a list] tomas
2022-11-30 1:17 ` Emanuel Berg
2022-11-30 1:13 ` Easy to add with push but not to the end of a list Emanuel Berg
2022-11-28 19:59 ` Emanuel Berg
2022-11-28 21:56 ` [External] : " Drew Adams
2022-11-28 22:18 ` Heime
2022-11-28 22:41 ` Drew Adams
2022-11-29 11:17 ` Dr Rainer Woitok
2022-11-30 17:10 ` Michael Heerdegen [this message]
2022-11-30 18:17 ` [External] : " Drew Adams
2022-11-30 19:30 ` Emanuel Berg
2022-12-01 15:11 ` Michael Heerdegen
2022-12-01 17:25 ` Emanuel Berg
2022-12-03 21:29 ` Michael Heerdegen
2022-12-05 23:35 ` Emanuel Berg
2022-12-06 1:36 ` Michael Heerdegen
2022-12-06 1:43 ` Emanuel Berg
2022-12-06 2:17 ` Michael Heerdegen
2022-12-06 2:40 ` Emanuel Berg
2022-12-06 13:56 ` Stefan Monnier via Users list for the GNU Emacs text editor
2022-12-06 14:45 ` Michael Heerdegen
2022-12-06 2:52 ` Emanuel Berg
2022-12-06 17:22 ` Michael Heerdegen
2022-12-06 22:30 ` Emanuel Berg
2022-12-08 23:15 ` Michael Heerdegen
2022-12-28 23:52 ` Emanuel Berg
2022-12-31 16:57 ` Michael Heerdegen
2022-12-31 22:09 ` Emanuel Berg
2023-01-01 12:16 ` Michael Heerdegen
2023-01-08 4:40 ` Emanuel Berg
2023-01-09 6:32 ` Emanuel Berg
2023-01-14 12:05 ` Michael Heerdegen
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