From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: append, push, and add-to-list. Date: Mon, 05 Jul 2021 14:39:26 -0400 Message-ID: References: <87o8bgg6br.fsf@zoho.eu> <20210705154121.GB6395@tuxteam.de> <871r8cg0je.fsf@zoho.eu> <878s2keikw.fsf@zoho.eu> Reply-To: Stefan Monnier Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="28031"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:K7+XJIrW7vkpKDMpSVy5r/OtxO0= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Jul 05 20:39:56 2021 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 1m0TVb-0007Ba-EW for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 05 Jul 2021 20:39:55 +0200 Original-Received: from localhost ([::1]:42146 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m0TVa-0006p5-GM for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 05 Jul 2021 14:39:54 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50018) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0TVG-0006ou-3E for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 14:39:34 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:39566) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0TVE-0003c8-Jg for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 14:39:33 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1m0TVD-0006fG-2f for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 20:39:31 +0200 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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:131490 Archived-At: Emanuel Berg [2021-07-05 20:11:59] wrote: > Or `(,@(list)) A bit too obvious, methinks. Maybe: (seq-intersection (seq-filter #'cl-oddp (seq-map-indexed (lambda (_ i) i) (make-list (random 42) nil))) (seq-filter #'cl-evenp (seq-map-indexed (lambda (_ i) i) (make-list (random 42) nil)))) -- Stefan