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: Exiting from mapc Date: Thu, 2 Jan 2025 13:53:54 +0300 Message-ID: References: <7cSjmNb9wbuuXOPxnBml1e6cPaldn8EPTGZ2LZdnm-ZjIANwQBYOYq9a-nJDcaCG8QKkb09TGeUjlQ6vLFyFVzOPZfJniDINxCNXT1TW6vQ=@protonmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2118"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.2.12 (2023-09-09) Cc: Heime via Users list for the GNU Emacs text editor To: Heime Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jan 02 11:54:18 2025 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 1tTIqI-0000PU-4k for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 02 Jan 2025 11:54:18 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tTIq2-0004bh-Tr; Thu, 02 Jan 2025 05:54:02 -0500 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 1tTIq0-0004b0-PW for help-gnu-emacs@gnu.org; Thu, 02 Jan 2025 05:54:00 -0500 Original-Received: from stw1.rcdrun.com ([217.170.207.13]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tTIpz-0008ED-9O for help-gnu-emacs@gnu.org; Thu, 02 Jan 2025 05:54:00 -0500 Original-Received: from localhost ([::ffff:41.75.183.103]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 000000000001BF35.0000000067767044.001513EE; Thu, 02 Jan 2025 03:53:56 -0700 Mail-Followup-To: Heime , Heime via Users list for the GNU Emacs text editor Content-Disposition: inline In-Reply-To: <7cSjmNb9wbuuXOPxnBml1e6cPaldn8EPTGZ2LZdnm-ZjIANwQBYOYq9a-nJDcaCG8QKkb09TGeUjlQ6vLFyFVzOPZfJniDINxCNXT1TW6vQ=@protonmail.com> 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, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:149112 Archived-At: * Heime via Users list for the GNU Emacs text editor [2024-12-31 22:37]: > > How can I exit when encountering 'safg or 'nogo > > (defun amazones-falkotr-kntlr (actm-seqr) > > (mapc > > (lambda (actm) > ;; Evaluate conditions and executes corresponding actions > ;; based on matching clauses. > > (cond > > ;; CASE > ((eq actm 'safg) > (message "SAFG amazones-falkotr-kntlr")) To answer the message "How can I exit when encountering 'safg or 'nogo', yes, you can exit. Here is what happens if there is no number 1 in the list here below: (let ((list (catch 'no-go (mapc (lambda (item) (if (= item 1) (throw 'no-go nil) (message "Processing item: %S" item))) '(2 3 4 5 6))))) list) ➜ (2 3 4 5 6) But if there is number one, `throw' exits: (let ((list (catch 'no-go (mapc (lambda (item) (if (= item 1) (throw 'no-go nil) (message "Processing item: %S" item))) '(2 1 3 4 5 6))))) list) Processing item: 2 and finished there! So yes, you can exit from mapc if you enclose it with `catch' this way. -- Jean Louis