From: Sam Steingold <sds@gnu.org>
To: emacs-devel@gnu.org, "Mattias Engdegård" <mattiase@acm.org>
Subject: Re: lexicographic list comparison
Date: Mon, 12 Sep 2022 10:45:06 -0400 [thread overview]
Message-ID: <lzsfkwmz2l.fsf@3c22fb11fdab.ant.amazon.com> (raw)
In-Reply-To: <E79429C1-EBAA-4601-A818-1BDF6745B7B1@acm.org> ("Mattias Engdegård"'s message of "Sat, 10 Sep 2022 11:07:49 +0200")
> * Mattias Engdegård <znggvnfr@npz.bet> [2022-09-10 11:07:49 +0200]:
>
> 9 sep. 2022 kl. 21.27 skrev Sam Steingold <sds@gnu.org>:
>
>> What do you do when sorting a list of lists of numbers?
>
> Sigh deeply and write ad-hoc code for the nth time.
okay, so, I suppose, you find the `lexicographic-compare-lists' from TS
useful, right?
>> Or maybe sorting lists of lists is just such a rare op that no one has
>> ever encountered it before me?
>
> It would be useful to have a total ordering on Lisp values: for
> heterogeneous ordered collections, for simplifying multi-key sorting,
> for normalising unordered collections, etc.
I certainly have no intention of comparing strings with numbers &c.
My question was about a list of _homogeneous_ lists, and comparing to,
say, lists of numbers, is done lexicographically based on number
comparison.
--
Sam Steingold (https://aphar.dreamwidth.org/) on darwin Ns 10.3.2113
https://lastingimpactpsychology.com https://steingoldpsychology.com
https://www.peaceandtolerance.org/ https://www.memritv.org
When C++ is your hammer, everything looks like a thumb.
next prev parent reply other threads:[~2022-09-12 14:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-09 19:27 lexicographic list comparison Sam Steingold
2022-09-10 9:07 ` Mattias Engdegård
2022-09-10 9:22 ` Emanuel Berg
2022-09-10 9:26 ` tomas
2022-09-12 14:45 ` Sam Steingold [this message]
2022-09-12 17:53 ` mattiase
2022-09-12 18:31 ` Stefan Monnier
2022-09-12 18:41 ` Sam Steingold
2022-09-12 19:32 ` Stefan Monnier
2022-09-12 18:35 ` Sam Steingold
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