From: Damien Cassou <damien@cassou.me>
To: Drew Adams <drew.adams@oracle.com>
Cc: 26540@debbugs.gnu.org
Subject: bug#26540: 25.2; [PATCH] Add cl-set-equal to test for set equality
Date: Tue, 18 Apr 2017 13:21:41 +0200 [thread overview]
Message-ID: <87wpaic662.fsf@cassou.me> (raw)
In-Reply-To: <9502fe98-aed5-4474-aaed-5e88d5c1cd6f@default> (Drew Adams's message of "Mon, 17 Apr 2017 06:55:20 -0700 (PDT)")
Drew Adams <drew.adams@oracle.com> writes:
>> This patch adds cl-seq-equal to test whether two lists have the
>> same elements. I.e., if every element of LIST1 also appears in
>> LIST2 and if every element of LIST2 also appears in LIST1.
>
> Common Lisp (and the Emacs emulation) already has set functions
> that do this - `[cl-]set-exclusive-or', for example.
>
> https://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node152.html
are you saying that (1) I should propose an implementation of
set-equal based on set-exclusive-or (I guess it's just a `not`
call away) or (2) not propose set-equal all together? I understand
(1), but not the reasoning behind (2).
--
Damien Cassou
http://damiencassou.seasidehosting.st
"Success is the ability to go from one failure to another without
losing enthusiasm." --Winston Churchill
next prev parent reply other threads:[~2017-04-18 11:21 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-17 9:16 bug#26540: 25.2; [PATCH] Add cl-set-equal to test for set equality Damien Cassou
2017-04-17 13:55 ` Drew Adams
2017-04-18 11:21 ` Damien Cassou [this message]
2017-04-18 14:00 ` Drew Adams
2017-04-18 14:40 ` Damien Cassou
2017-04-18 21:49 ` Drew Adams
2017-04-18 20:13 ` John Mastro
2017-04-18 21:53 ` Drew Adams
2017-04-19 9:39 ` Nicolas Petton
2017-04-19 10:43 ` Damien Cassou
2017-04-19 11:39 ` Damien Cassou
2017-04-19 14:41 ` Nicolas Petton
2017-05-03 13:02 ` Damien Cassou
2017-05-04 9:41 ` Nicolas Petton
2017-04-19 21:19 ` Michael Heerdegen
2017-05-03 13:12 ` Damien Cassou
2017-05-11 19:42 ` Michael Heerdegen
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