From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail
From: Heime <heimeborgia@protonmail.com>
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: <ODC_sHi308FT03Ga8vMOJsu-tkYjFLy80nZMhFcBlInyM5y_12AevH9mXQgTmKlPMSKy8MI1iCbTEeLqJCs0CKdANAJCDCApM9BQ3ZrNQhY=@protonmail.com>
References: <yo_QhxmNXHgw-go3qtQ1ui_qIYcRf_DkxPMakizW3aIPSHkd2mugAnQtHcXK8W3WHla_NV0Kj73b4fbz8az1qv_3wkYIBzjgwYCuQ0wo8n0=@protonmail.com>
 <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 <joostkremers@fastmail.fm>
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: <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org>
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 <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org>)
	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 <help-gnu-emacs-bounces@gnu.org>)
	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 <heimeborgia@protonmail.com>)
 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 <heimeborgia@protonmail.com>)
 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 <help-gnu-emacs.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/help-gnu-emacs>,
 <mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/help-gnu-emacs>
List-Post: <mailto:help-gnu-emacs@gnu.org>
List-Help: <mailto:help-gnu-emacs-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
 <mailto:help-gnu-emacs-request@gnu.org?subject=subscribe>
Original-Sender: "help-gnu-emacs" <help-gnu-emacs-bounces@gnu.org>
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: <http://permalink.gmane.org/gmane.emacs.help/140379>






Sent with Proton Mail secure email.

------- Original Message -------
On Tuesday, October 25th, 2022 at 5:25 PM, Joost Kremers <joostkremers@fast=
mail.fm> 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