From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Heime Newsgroups: gmane.emacs.help Subject: Re: Testing whether a list contains at least one non-nil element Date: Tue, 25 Oct 2022 19:44:55 +0000 Message-ID: References: <87r0yvst2a.fsf@fastmail.fm> 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="1774"; mail-complaints-to="usenet@ciao.gmane.io" Cc: help-gnu-emacs@gnu.org To: Joost Kremers Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Oct 25 21:46:24 2022 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 1onPsW-0000Ef-4g for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 25 Oct 2022 21:46:24 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1onPrO-00079Q-PF; Tue, 25 Oct 2022 15:45:14 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1onPrH-0006Hw-27 for help-gnu-emacs@gnu.org; Tue, 25 Oct 2022 15:45:08 -0400 Original-Received: from mail-4319.protonmail.ch ([185.70.43.19]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1onPrE-00063D-ON for help-gnu-emacs@gnu.org; Tue, 25 Oct 2022 15:45:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1666727102; x=1666986302; bh=yFJ4xzjWCmTx6K4wuzHymnmp9qhmMtFcjXLJhvSKxR0=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=P+kf70q10EZL+yf8UpaaW1vmC++TBPSTDJsGmvL17Sy3+O3Cw6ihq7n8YOdtqxmk4 M6vJRL4vtlFHv9lV4tCG2zeXlhoPe0QXKk8GDKVx2Zx8N5bKaXP4X/X3kwyEDEqMrw E/zWcb0nGqTC/uGrotWbTlyJb/Dwf/BGJI8Z4qQ79h3SZ5J5XjjQvm5YVFR8xo5vCN WozPexS+lYLrA8/0VdBJ2y3/redUdLOTYTKLGrinwxbDMwzP7cV00a7zugI7ylmLnH NqegxFFLCHhgKH+ykJyuIPgGx1GyGBm71Vb7LQ6H6MD8gNS/QtBRj8f4KH89FBakoU kf+BBjzZv+72w== In-Reply-To: <87r0yvst2a.fsf@fastmail.fm> Feedback-ID: 57735886:user:proton Received-SPF: pass client-ip=185.70.43.19; envelope-from=heimeborgia@protonmail.com; helo=mail-4319.protonmail.ch 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, FREEMAIL_FROM=0.001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-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: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: "help-gnu-emacs" Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:140379 Archived-At: Sent with Proton Mail secure email. ------- Original Message ------- On Tuesday, October 25th, 2022 at 5:25 PM, Joost Kremers wrote: > On Tue, Oct 25 2022, Heime wrote: >=20 > > I would like to test whether a list contains at least one non-nil eleme= nt? If I do that, then > > I would be able to continue a loop where a non-nil element would mean t= hat a match was found. >=20 >=20 > (seq-some (lambda (e) (not (null e))) mylist) >=20 > or shorter: >=20 > (not (seq-every-p #'null mylist)) How does your implementation (not (seq-every-p #'null mylist)) compared to= =20 (elt (delq nil mylist) 0)=20