From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/34793 Path: news.gmane.org!not-for-mail From: Peter Rolf Newsgroups: gmane.comp.tex.context Subject: Re: Test whether variable has been set Date: Sun, 27 May 2007 15:26:37 +0200 Message-ID: <4659870D.9080501@gmx.net> References: Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Trace: sea.gmane.org 1180272411 16946 80.91.229.12 (27 May 2007 13:26:51 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Sun, 27 May 2007 13:26:51 +0000 (UTC) To: mailing list for ConTeXt users Original-X-From: ntg-context-bounces@ntg.nl Sun May 27 15:26:50 2007 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from ronja.vet.uu.nl ([131.211.172.88] helo=ronja.ntg.nl) by lo.gmane.org with esmtp (Exim 4.50) id 1HsIll-0000RU-C8 for gctc-ntg-context-518@m.gmane.org; Sun, 27 May 2007 15:26:49 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id A28921FE66; Sun, 27 May 2007 15:26:47 +0200 (CEST) Original-Received: from ronja.ntg.nl ([127.0.0.1]) by localhost (smtp.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 03129-01; Sun, 27 May 2007 15:26:42 +0200 (CEST) Original-Received: from ronja.vet.uu.nl (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id BE5071FE82; Sun, 27 May 2007 15:26:41 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id 35A571FE82 for ; Sun, 27 May 2007 15:26:40 +0200 (CEST) Original-Received: from ronja.ntg.nl ([127.0.0.1]) by localhost (smtp.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 02385-03-2 for ; Sun, 27 May 2007 15:26:36 +0200 (CEST) Original-Received: from mail.gmx.net (mail.gmx.net [213.165.64.20]) by ronja.ntg.nl (Postfix) with SMTP id 461CF1FE66 for ; Sun, 27 May 2007 15:26:36 +0200 (CEST) Original-Received: (qmail invoked by alias); 27 May 2007 13:26:36 -0000 Original-Received: from i577B82E7.versanet.de (EHLO [192.168.1.3]) [87.123.130.231] by mail.gmx.net (mp051) with SMTP; 27 May 2007 15:26:36 +0200 X-Authenticated: #24293357 X-Provags-ID: V01U2FsdGVkX19ZpM0oW3NZFNV82slG3OWUM8W6Q0fIbwBA5qFqcr GdXchIRGbbIdCN User-Agent: Thunderbird 2.0.0.0 (Windows/20070326) In-Reply-To: X-Enigmail-Version: 0.95.0 X-Y-GMX-Trusted: 0 X-Virus-Scanned: amavisd-new at ntg.nl X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.9 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: ntg-context-bounces@ntg.nl Errors-To: ntg-context-bounces@ntg.nl X-Virus-Scanned: amavisd-new at ntg.nl Xref: news.gmane.org gmane.comp.tex.context:34793 Archived-At: Hi Elliot, Elliot Clifton schrieb: > Hi, > > How can test whether a variable has been set? I couldn't find any > reference to this in the wiki? > What do you mean by "set"? I use \doifnothing{\getvariable{foo}{bar}} {foo:bar contains nothing.\par}% \doifsomething{\getvariable{foo}{bar}} {foo:bar contains something.\par}% \doifelsenothing{\getvariable{foo}{bar}} {foo:bar contains nothing.\par} {foo:bar contains something.\par}% to test, if a defined(!) variable contains something. If you want to test if a variable is defined, you can use \doifnotvariable{foo}{bar} {foo:bar is undefined.\par}% \doifvariable{foo}{bar} {foo:bar is defined.\par}% \doifelsevariable{foo}{bar} {foo:bar is defined.\par} {foo:bar is undefined.\par}% Never used these macros, as I always define default values for my variables. HTH, Peter > TIA, > > Elliot > ___________________________________________________________________________________ > If your question is of interest to others as well, please add an entry to the Wiki! > > maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://tex.aanhet.net > archive : https://foundry.supelec.fr/projects/contextrev/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ > ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________