From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: Anonymous arguments - Re: comic-book-insult Date: Tue, 17 Sep 2019 08:19:22 +0200 Message-ID: <20190917061922.GS22470@protected.rcdrun.com> References: <86k1aiip6o.fsf@zoho.eu> <20190909080001.GE20896@protected.rcdrun.com> <86lfuxgyt0.fsf@zoho.eu> <20190909180553.GC20896@protected.rcdrun.com> <83a7bd2v8z.fsf@gnu.org> <20190911125612.GY23696@protected.rcdrun.com> <86k1aedfzg.fsf@zoho.eu> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="171617"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Mutt/1.10.1 (2018-07-13) Cc: GNU Emacs Help To: Emanuel Berg Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue Sep 17 08:19:39 2019 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iA6pv-000iVS-4E for geh-help-gnu-emacs@m.gmane.org; Tue, 17 Sep 2019 08:19:39 +0200 Original-Received: from localhost ([::1]:42176 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iA6pu-0006oE-1P for geh-help-gnu-emacs@m.gmane.org; Tue, 17 Sep 2019 02:19:38 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:37399) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iA6pj-0006lh-SD for help-gnu-emacs@gnu.org; Tue, 17 Sep 2019 02:19:29 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iA6pi-0003Qx-Ne for help-gnu-emacs@gnu.org; Tue, 17 Sep 2019 02:19:27 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:46223) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iA6pi-0003Ou-Fq for help-gnu-emacs@gnu.org; Tue, 17 Sep 2019 02:19:26 -0400 Original-Received: from protected.rcdrun.com ([::ffff:31.223.149.84]) (AUTH: PLAIN admin, TLS: TLS1.2,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 000000000006E364.000000005D807AEC.0000470D; Mon, 16 Sep 2019 23:19:24 -0700 Original-Received: from localhost (localhost [127.0.0.1]) (uid 1001) by protected.rcdrun.com with local id 00000000000C18DC.000000005D807AEA.000032C6; Tue, 17 Sep 2019 08:19:22 +0200 Content-Disposition: inline In-Reply-To: <86k1aedfzg.fsf@zoho.eu> X-Mime-Autoconverted: from 8bit to quoted-printable by courier 1.0.6 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 217.170.207.13 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.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:121519 Archived-At: * Emanuel Berg via Users list for the GNU Emacs text editor [2019-09-11 17:36]: > Jean Louis wrote: >=20 > > Cannot find it, help me. I wish to > > understand it. >=20 > Assimilate this: >=20 > (info "(elisp) Using Lexical Binding") Now I found it, I was looking for "_" instead of "underscore" word, now I got it. Thanks. A simple way to find out which variables need a variable definition is to byte-compile the source file. *Note Byte Compilation::. If a non-special variable is used outside of a =E2=80=98let=E2=80=99 form, the = byte-compiler will warn about reference or assignment to a free variable. If a non-special variable is bound but not used within a =E2=80=98let=E2=80=99 = form, the byte-compiler will warn about an unused lexical variable. The byte-compiler will also issue a warning if you use a special variable as a function argument. (To silence byte-compiler warnings about unused variables, just use a variable name that start with an underscore. The byte-compiler interprets this as an indication that this is a variable known not to be used.)