From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#50928: remove-dups Date: Fri, 01 Oct 2021 14:45:39 +0200 Message-ID: <87pmsox6a4.fsf@gnus.org> References: <4CCC2E52-1B22-4852-9ED6-52612CF7D786@misasa.okayama-u.ac.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="32731"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: 50928@debbugs.gnu.org To: Tak Kunihiro Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Oct 01 14:46:26 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mWHvm-0008F3-10 for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 01 Oct 2021 14:46:26 +0200 Original-Received: from localhost ([::1]:57766 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mWHvk-0003eH-3U for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 01 Oct 2021 08:46:24 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46904) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mWHvO-0003do-7z for bug-gnu-emacs@gnu.org; Fri, 01 Oct 2021 08:46:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:43351) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mWHvN-00072y-Vs for bug-gnu-emacs@gnu.org; Fri, 01 Oct 2021 08:46:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1mWHvN-0000Iz-Pb for bug-gnu-emacs@gnu.org; Fri, 01 Oct 2021 08:46:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 01 Oct 2021 12:46:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 50928 X-GNU-PR-Package: emacs Original-Received: via spool by 50928-submit@debbugs.gnu.org id=B50928.16330923561153 (code B ref 50928); Fri, 01 Oct 2021 12:46:01 +0000 Original-Received: (at 50928) by debbugs.gnu.org; 1 Oct 2021 12:45:56 +0000 Original-Received: from localhost ([127.0.0.1]:54895 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mWHvI-0000IX-4P for submit@debbugs.gnu.org; Fri, 01 Oct 2021 08:45:56 -0400 Original-Received: from quimby.gnus.org ([95.216.78.240]:53596) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mWHvF-0000I9-J6 for 50928@debbugs.gnu.org; Fri, 01 Oct 2021 08:45:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID :In-Reply-To:Date:References:Subject:Cc:To:From:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=4OITlTbM8Oo5sCEe7YfagiZfCh6dRMcF4LQqbi7GAzE=; b=NwnSVl1z8hwooRHKyItl8YXDPx MRyM/NnHCzaCqUH9vPYe5FW/a3yKY2V3lGHWPj94vFDlmZi1iuuYiIx8d9hImWy73BTVgWCojB0y6 6RRE9dhj5lwt3wzkgaqJUle0GnTxo5slaemXXcfgC+NDawc3irvqx+d6iufXba55VYIQ=; Original-Received: from [84.212.220.105] (helo=elva) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mWHv3-0001IK-2q; Fri, 01 Oct 2021 14:45:43 +0200 X-Now-Playing: The Notwist's _Vertigo Dubs Vol. 1: Odd Nosdam_: "Ship (Odd Nosdam Remix)" In-Reply-To: <4CCC2E52-1B22-4852-9ED6-52612CF7D786@misasa.okayama-u.ac.jp> (Tak Kunihiro's message of "Fri, 1 Oct 2021 12:23:18 +0900") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:216035 Archived-At: Tak Kunihiro writes: > I wanted to delete duplicated items from a list non-destructively. > It took me a while to find out how to do so. > > (cl-remove-duplicates list :test 'equal) > (delete-dups (copy-sequence list)) > > I think it is handy to have something like below in subr.el. > Too obvious? > > #+begin_src emacs-lisp > (defun remove-dups (list) > "Remove 'equal' duplicates from LIST non-destructively. > Note that `delete-dups' deletes duplicates destructively." > (delete-dups (copy-sequence list))) > #+end_src This is basically seq-uniq: --- seq-uniq is an autoloaded compiled Lisp function in =E2=80=98seq.el=E2=80= =99. (seq-uniq SEQUENCE &optional TESTFN) --- The seq library has a pretty full set of sequence functions, some of which overlaps with the older functions like `delete-dups'. --=20 (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no