From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Thien-Thi Nguyen Newsgroups: gmane.emacs.help Subject: Re: cl-delete-if vs list of overlays Date: Wed, 09 Dec 2020 05:17:57 -0500 Message-ID: <874kkv706i.fsf@gnuvola.org> References: <87zh2nfgq1.fsf@omarpolo.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="11439"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) Cc: help-gnu-emacs@gnu.org To: Omar Polo Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Wed Dec 09 11:20:47 2020 Return-path: Envelope-to: geh-help-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 1kmwaV-0002tr-85 for geh-help-gnu-emacs@m.gmane-mx.org; 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a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnuvola.org ; s=default; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: 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=F8/kwG4RF5bSmZODuOcXkzBOgBaiEJyXRQDtrNNvfMU=; b=U73lcYm+4Z7HryxkY9wryEC5RL FE3MqM0IbSJ3fFNQKn3gj/yEkPVcF/abvEbt7R4zrw43lswktMXWh3b7QYlrrEcv/7qTCKXH7rsxJ Jfc8vYwUlg6rAANtFXb+dp1rB2VYT/IkC2FmgRozB4VPK9aBdygwgQSqGdj6jcFbj+Tc=; Original-Received: from [50.89.166.226] (port=47786 helo=miasma) by giow1035.siteground.us with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90.1) (envelope-from ) id 1kmwZI-000H7o-Vz; Wed, 09 Dec 2020 10:19:33 +0000 Mail-Followup-To: help-gnu-emacs@gnu.org In-Reply-To: <87zh2nfgq1.fsf@omarpolo.com> (Omar Polo's message of "Wed, 09 Dec 2020 10:53:26 +0100") X-Originating-IP: 35.209.110.241 X-SpamExperts-Domain: giow1035.siteground.us X-SpamExperts-Username: 35.209.110.241 Authentication-Results: mailspamprotection.com; 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envelope-from=ttn@gnuvola.org; helo=delivery.mailspamprotection.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:126186 Archived-At: --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable () Omar Polo () Wed, 09 Dec 2020 10:53:26 +0100 Why is cl-delete-if not removing items from the list? (setq delp t) evaluates to t, so it should delete. cl-delete-if a destructive function. This is what I'm not getting. On my system, =E2=80=98C-h f cl-delete-if RET=E2=80=99 sez: This is a destructive function; it reuses the storage of SEQ whenever possible. So, your question becomes: When is it NOT possible to reuse the storage of SEQ in the process of deleting an item? =2D-=20 Thien-Thi Nguyen ----------------------------------------------- (defun responsep (query) ; (2020) Software Libero (pcase (context query) ; =3D Dissenso Etico (`(technical ,ml) (correctp ml)) ...)) 748E A0E8 1CB8 A748 9BFA =2D-------------------------------------- 6CE4 6703 2224 4C80 7502 --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iG4EARECAC4WIQR0jqDoHLinSJv6bORnAyIkTIB1AgUCX9CkVxAcdHRuQGdudXZv bGEub3JnAAoJEGcDIiRMgHUCUmUAnAmQKm5Im5zkUZ26NpqH7a5Np6OEAJ9cvKss 19hwT2KHcaVPMrNHHbrXxA== =ZL0T -----END PGP SIGNATURE----- --=-=-=--