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: Example use of macro to minimize and generalize the code (2) Date: Tue, 1 Jun 2021 00:45:43 +0300 Message-ID: References: <87k0nfesns.fsf@zoho.eu> <87mtsbd31w.fsf@zoho.eu> <87a6oad81r.fsf@zoho.eu> 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="15715"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.7+183 (3d24855) (2021-05-28) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon May 31 23:48:13 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 1lnpld-0003ux-GT for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 31 May 2021 23:48:13 +0200 Original-Received: from localhost ([::1]:41840 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lnplc-0005yE-J5 for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 31 May 2021 17:48:12 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:43824) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lnpl7-0005xo-7i for help-gnu-emacs@gnu.org; Mon, 31 May 2021 17:47:45 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:52659) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lnpl5-00043X-Ky for help-gnu-emacs@gnu.org; Mon, 31 May 2021 17:47:41 -0400 Original-Received: from localhost ([::ffff:197.157.0.35]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 00000000000ADF02.0000000060B55979.00007B00; Mon, 31 May 2021 14:47:37 -0700 Mail-Followup-To: help-gnu-emacs@gnu.org Content-Disposition: inline In-Reply-To: <87a6oad81r.fsf@zoho.eu> Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_SORBS_WEB=1.5, SPF_HELO_PASS=-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:130393 Archived-At: * Emanuel Berg via Users list for the GNU Emacs text editor [2021-05-31 22:21]: > What kind of things or problems could or should you solve with > macros? Another good use of a macro is with the database application where: - database user can define the type of the object, for example, database user "joe" could create new type named "bc evaluation" - the type of the object is accessible to user only, not to other users; - user edits the type and declares that the value should be evaluated with the external program named "bc". Such declaration could be simple "bc" instead of complex programming - macro generates a function specific for that user who needs to see the output from "bc evaluation" Thus it becomes a program that develops itself further based on users's input. -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns Sign an open letter in support of Richard M. Stallman https://stallmansupport.org/