From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Damien Cassou Newsgroups: gmane.emacs.bugs Subject: bug#26540: 25.2; [PATCH] Add cl-set-equal to test for set equality Date: Tue, 18 Apr 2017 13:21:41 +0200 Message-ID: <87wpaic662.fsf@cassou.me> References: <87bmrve6n9.fsf@cassou.me> <9502fe98-aed5-4474-aaed-5e88d5c1cd6f@default> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-Trace: blaine.gmane.org 1492514537 9270 195.159.176.226 (18 Apr 2017 11:22:17 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 18 Apr 2017 11:22:17 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) Cc: 26540@debbugs.gnu.org To: Drew Adams Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Apr 18 13:22:11 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1d0RD0-0002Dj-Po for geb-bug-gnu-emacs@m.gmane.org; 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Tue, 18 Apr 2017 13:21:48 +0200 (CEST) Original-Received: from luz4 (31-211-216-84.customers.ownit.se [31.211.216.84]) by mail.choca.pics (Postfix) with ESMTPSA id 39E67232B47E; Tue, 18 Apr 2017 13:21:48 +0200 (CEST) In-Reply-To: <9502fe98-aed5-4474-aaed-5e88d5c1cd6f@default> (Drew Adams's message of "Mon, 17 Apr 2017 06:55:20 -0700 (PDT)") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:131723 Archived-At: Drew Adams 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