From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Philip Kaludercic Newsgroups: gmane.emacs.help Subject: Re: How to test if symbol from string exists? Date: Fri, 16 Apr 2021 09:22:34 +0000 Message-ID: <87zgxywplx.fsf@posteo.net> References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="36538"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Help GNU Emacs To: Jean Louis Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Apr 16 11:23:39 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 1lXKhP-0009Hm-TQ for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 16 Apr 2021 11:23:39 +0200 Original-Received: from localhost ([::1]:57394 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lXKhO-0006WK-VM for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 16 Apr 2021 05:23:38 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:43258) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXKgc-0006W4-Jg for help-gnu-emacs@gnu.org; Fri, 16 Apr 2021 05:22:52 -0400 Original-Received: from mout02.posteo.de ([185.67.36.66]:43475) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXKgV-0000GI-4c for help-gnu-emacs@gnu.org; Fri, 16 Apr 2021 05:22:50 -0400 Original-Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 164372400FD for ; Fri, 16 Apr 2021 11:22:36 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.net; s=2017; t=1618564957; bh=SbFH0gaXyrk8R6xi/7fybNSGsOpETUEyPXr64kb1uu4=; h=From:To:Cc:Subject:Date:From; b=MB7y+XDgkqi5FUSn1kqIXGN1hDsIa3RwDbRmcrp3BMNKLA+tSM7gudOyZlDJxXsDO eByER468pN3mZLL+WruViMY8GtYrJwIAxu17UmqXfOJbjUOGa/HrJOmr/hL7ND9YJ8 llx5vpZc9+LkqcCRw7uLKvO0FQPdE72GI5P9muDG0hkDHkrPXgHvnZcJnggrGzGGri FRSJRZZyq4/KTppWCwbc442g4gC2Adkq/fMKtG9/c4HUhA+2WgK+IxzTRv77FW9cmm 8t5zfMQo4U+49WYYuF/1jedTcosHkkYP8IQ5dp8lxYHkYKANIlZnVL43Iv6UpA+pn7 38wArMTR/tcBA== Original-Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4FM9j71QT6z9rxx; Fri, 16 Apr 2021 11:22:35 +0200 (CEST) In-Reply-To: (Jean Louis's message of "Fri, 16 Apr 2021 12:09:22 +0300") Received-SPF: pass client-ip=185.67.36.66; envelope-from=philipk@posteo.net; helo=mout02.posteo.de X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=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:129007 Archived-At: 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. > But before asking for the value, I would like to test if symbol > exists. So I am trying this: > > (bound-and-true-p (intern "rcd-db-people-mode-map")) That is because bound-and-true-p is a macro. > and I get error: > > Wrong type argument: symbolp, (intern "rcd-db-people-mode-map") > > as what I am trying to accomplish is to stop updating this function > with the one below that still does not work: > > (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))) > > so I would like replacing above function with the one here below, > which is now not working until I solve the problem how to verify for > the symbol existence, which symbol name I get from string. > > (defun rcd-db-table-mode-map (table) > (let ((symbol (intern (format "rcd-db-%s-mode-map" table)))) > (if (bound-and-true-p symbol) > (symbol-value symbol) > rcd-db-mode-map))) > > > Thank you, > Jean > > -- Philip K.