From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: avoid narrow-to-region (was: Re: replace-regexp) Date: Sun, 09 May 2021 00:59:23 +0200 Message-ID: <87eeegx25w.fsf_-_@zoho.eu> References: <87tunf1mz5.fsf@zoho.eu> <87v97v6mxg.fsf@gnu.org> <87wnsaz9df.fsf@zoho.eu> <877dkaytwu.fsf@zoho.eu> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="6794"; 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:FBeiaZGn8IZW2UNA3r0Ac0ZDgOc= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sun May 09 01:00:19 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 1lfVvm-0001dq-OJ for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 09 May 2021 01:00:18 +0200 Original-Received: from localhost ([::1]:35924 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lfVvl-0000yP-8w for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 08 May 2021 19:00:17 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:60612) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lfVv6-0000yG-E6 for help-gnu-emacs@gnu.org; Sat, 08 May 2021 18:59:36 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:37528) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lfVv1-0003C4-EQ for help-gnu-emacs@gnu.org; Sat, 08 May 2021 18:59:36 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1lfVuy-0000gA-MV for help-gnu-emacs@gnu.org; Sun, 09 May 2021 00:59:28 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never 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:129587 Archived-At: Stefan Monnier via Users list for the GNU Emacs text editor wrote: > I recommend avoiding the use of narrowing as much as > possible since it can have other undesirable effects (e.g. > it changes the result of things like `syntax-ppss`). I checked my Elisp for `narrow-to-region' and found just one use, namely (defun sort-lines-random (beg end) (interactive "r") (save-excursion (save-restriction (narrow-to-region beg end) (goto-char (point-min)) (sort-subr nil #'forward-line #'end-of-line nil nil (lambda (_ __) (zerop (random 2)) ))))) (defalias 'r #'sort-lines-random) ;; test here: ;; aaa ;; ccc ;; ddd ;; bbb If one were to remove it, how would one specify the end of the operation? https://dataswamp.org/~incal/emacs-init/sort-incal.el -- underground experts united https://dataswamp.org/~incal