From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: FW: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'? Date: Fri, 8 Jan 2021 05:50:25 +0300 Message-ID: References: <87o8i1ou7m.fsf@zoho.eu> <0db0bc9d-7efb-4d3e-8462-545d0a5b25f5@default> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="11375"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0 (3d08634) (2020-11-07) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jan 08 03:54:05 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 1kxhuf-0002rg-1i for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 08 Jan 2021 03:54:05 +0100 Original-Received: from localhost ([::1]:57302 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kxhue-0005cm-37 for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 07 Jan 2021 21:54:04 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33628) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxhu6-0005cg-JN for help-gnu-emacs@gnu.org; Thu, 07 Jan 2021 21:53:30 -0500 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:47695) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxhu3-0006E2-FB for help-gnu-emacs@gnu.org; Thu, 07 Jan 2021 21:53:30 -0500 Original-Received: from localhost ([::ffff:41.210.145.49]) (AUTH: PLAIN securesender, TLS: TLS1.2,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 0000000000295443.000000005FF7C924.000049DF; Thu, 07 Jan 2021 19:53:24 -0700 Mail-Followup-To: help-gnu-emacs@gnu.org Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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: 2.1.23 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:127080 Archived-At: When replacing `dotimes' I also discover some of my errors: (defun list-append-first-to-first-cons (list) "Cons with FIRST-ELT . FIRST-ELT" (let ((new-list '()) (times (length list))) (dotimes (nr times new-list) (let* ((item (elt list nr))) (push (cons item item) new-list))))) (list-append-first-to-first-cons '(1 2 3)) ((3 . 3) (2 . 2) (1 . 1)) Then I replace it like: (defun list-append-first-to-first-cons (list) "Cons with FIRST-ELT . FIRST-ELT" (mapcar (lambda (item) (cons item item)) list)) (list-append-first-to-first-cons '(1 2 3)) ((1 . 1) (2 . 2) (3 . 3)) The reverse order was not detectable as results were used always in completion lists and I have not ever put attention on the order. In general I can replace `dotimes' without return value with `while' and those that shall return values as sequences with mapping functions.