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: Re: Is there a way of setting a variable only when it exists? Date: Sat, 19 Mar 2022 10:25:38 +0100 Message-ID: <87zglms38t.fsf@zoho.eu> References: <87lexdul8e.fsf@mbork.pl> <87lexcnq3w.fsf@web.de> <87bky7viz2.fsf@mbork.pl> <87a6dq3fr6.fsf@web.de> <87wngtu4r1.fsf@mbork.pl> <87tubxbpq7.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="22669"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:AnHT0EPjMtI2tKQ2d+j+T1YqMME= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Mar 19 17:39:30 2022 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 1nVc6z-0005ck-It for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 19 Mar 2022 17:39:29 +0100 Original-Received: from localhost ([::1]:34850 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nVc6y-0007dt-4r for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 19 Mar 2022 12:39:28 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:57490) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nVVLI-0000jc-DI for help-gnu-emacs@gnu.org; Sat, 19 Mar 2022 05:25:48 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:45158) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nVVLG-0006Kf-T0 for help-gnu-emacs@gnu.org; Sat, 19 Mar 2022 05:25:48 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1nVVLF-0003TQ-04 for help-gnu-emacs@gnu.org; Sat, 19 Mar 2022 10:25:45 +0100 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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Sat, 19 Mar 2022 12:38:25 -0400 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" Xref: news.gmane.io gmane.emacs.help:136677 Archived-At: Jean Louis wrote: >>>> If that happens, compiling your init.el will then >>>> normally give you an "assignment to free variable" >>>> warning, no? >>> >>> I didn't think about it. OTOH, why would I compile my >>> init.el? >> >> To get .elc which is better, faster byte-code as well as >> the other advantages of code-improvement that the >> byte-compiler's messages leads to if you take proper action ... >> >> This has been mentioned many times over the years here not >> the least ... > > It's going to be over the years not easily understood. > Maybe Emacs need some better "warning" or instructions how > to initiate byte compiling. Well, the OP has heard these arguments and others before, many times. As for introductions, I know only of (info "(elisp) Byte Compilation") -- underground experts united https://dataswamp.org/~incal