From: Emanuel Berg <incal@dataswamp.org>
To: help-gnu-emacs@gnu.org
Subject: Re: [External] : Use of an associated list with completing-read
Date: Sat, 20 Apr 2024 03:59:20 +0200 [thread overview]
Message-ID: <87r0f0ssjr.fsf@dataswamp.org> (raw)
In-Reply-To: jwvy198reda.fsf-monnier+emacs@gnu.org
Stefan Monnier via Users list for the GNU Emacs text editor wrote:
>> An even more common cliche for doing the same thing is to
>> do #1, then (2) cons instead of append, and (3) when
>> finished adding list elements, do an `nreverse' of the list
>> you created. That too is a destructive operation.
>
> That's the usual solution, with the desired linear (i.e.
> optimal) complexity, indeed.
AKA O(N) which is linear, or proportional to the problem
size N.
Even better is constant complexity, O(1), where it does not
matter how big the problem is, since that, N, isn't even in
the equation, as we saw.
Probably not possible in a lot of cases, including this one.
--
underground experts united
https://dataswamp.org/~incal
next prev parent reply other threads:[~2024-04-20 1:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-18 23:48 Use of an associated list with completing-read Heime
2024-04-19 2:14 ` [External] : " Drew Adams
2024-04-19 2:59 ` Heime
2024-04-19 3:10 ` Heime
2024-04-19 15:10 ` Drew Adams
2024-04-19 19:09 ` Heime
2024-04-19 23:32 ` Stefan Monnier via Users list for the GNU Emacs text editor
2024-04-20 1:13 ` Drew Adams
2024-04-20 1:52 ` Stefan Monnier via Users list for the GNU Emacs text editor
2024-04-20 1:59 ` Emanuel Berg [this message]
2024-04-20 6:14 ` Heime
2024-04-20 6:37 ` Heime
2024-04-23 4:44 ` Jean Louis
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