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: How to test if symbol from string exists? Date: Fri, 16 Apr 2021 13:04:45 +0300 Message-ID: References: <87zgxywplx.fsf@posteo.net> 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="7854"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.6 (2021-03-06) Cc: Help GNU Emacs To: Philip Kaludercic Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Apr 16 12:10:08 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 1lXLQO-0001vF-No for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 16 Apr 2021 12:10:08 +0200 Original-Received: from localhost ([::1]:53306 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lXLQN-000244-EF for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 16 Apr 2021 06:10:07 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:51302) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXLQ2-00023m-9K for help-gnu-emacs@gnu.org; Fri, 16 Apr 2021 06:09:46 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:53293) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXLQ0-0002q7-7P for help-gnu-emacs@gnu.org; Fri, 16 Apr 2021 06:09:45 -0400 Original-Received: from localhost ([::ffff:197.157.34.191]) (AUTH: PLAIN securesender, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 00000000000280CA.0000000060796265.00007208; Fri, 16 Apr 2021 03:09:40 -0700 Mail-Followup-To: Philip Kaludercic , Help GNU Emacs Content-Disposition: inline In-Reply-To: <87zgxywplx.fsf@posteo.net> 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:129008 Archived-At: * Philip Kaludercic [2021-04-16 12:23]: > Jean Louis writes: > > > I would like to test if symbol exists and is true. > > > > First I have string, like "people", then I can do this: > > > > (symbol-value (intern "rcd-db-people-mode-map")) and it gives me > > result. > > I think you want to use intern-soft, to return a symbol if it exists, > and nil if it doesn't. If you want to check if it is "used", boundp > should suffice, regardless of whether you use intern or intern-soft. Thanks, I made it this way here: (defun rcd-db-table-mode-map (table) (let ((symbol (format "rcd-db-%s-mode-map" table))) (if (intern-soft symbol) (symbol-value (intern symbol)) rcd-db-mode-map))) as that replaces now the function below and I can just add new function with new string to invoke either the default or specialy defined mode map. ;; (defun rcd-db-table-mode-map (table) ;; (cond ((string= "accounts" table) rcd-db-accounts-mode-map) ;; ((string= "acks" table) rcd-db-acks-mode-map) ;; ((string= "addressbookentries" table) rcd-db-addressbookentries-mode-map) ;; ((string= "areas" table) rcd-db-areas-mode-map) ;; ((string= "categories" table) rcd-db-categories-mode-map) ;; ((string= "countries" table) rcd-db-countries-mode-map) ;; ((string= "devt" table) rcd-db-devt-mode-map) ;; ((string= "edit" table) rcd-db-edit-mode-map) ;; ((string= "emails" table) rcd-db-emails-mode-map) ;; ((string= "groups" table) rcd-db-groups-mode-map) ;; ((string= "locationsets" table) rcd-db-locationsets-mode-map) ;; ((string= "mailinglistoptions" table) rcd-db-mailinglistoptions-mode-map) ;; ((string= "notes" table) rcd-db-notes-mode-map) ;; ((string= "pages" table) rcd-db-pages-mode-map) ;; ((string= "people" table) rcd-db-people-mode-map) ;; ((string= "skills" table) rcd-db-skills-mode-map) ;; ((string= "sms" table) rcd-db-sms-mode-map) ;; ((string= "statsdefinitions" table) rcd-db-statsdefinitions-mode-map) ;; (t rcd-db-mode-map))) -- 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/ https://rms-support-letter.github.io/