From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/80018 Path: news.gmane.org!not-for-mail From: Hans Hagen Newsgroups: gmane.comp.tex.context Subject: Re: to pass an argument in a macro Date: Tue, 25 Dec 2012 13:24:35 +0100 Message-ID: <50D99B03.3090205@wxs.nl> References: Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1356438293 25506 80.91.229.3 (25 Dec 2012 12:24:53 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 25 Dec 2012 12:24:53 +0000 (UTC) To: mailing list for ConTeXt users Original-X-From: ntg-context-bounces@ntg.nl Tue Dec 25 13:25:04 2012 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from balder.ntg.nl ([195.12.62.10]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TnTZ7-0005KW-3p for gctc-ntg-context-518@m.gmane.org; Tue, 25 Dec 2012 13:25:01 +0100 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id AA4CE1021D; Tue, 25 Dec 2012 13:24:46 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id BXMCAcVjhHKO; Tue, 25 Dec 2012 13:24:40 +0100 (CET) Original-Received: from balder.ntg.nl (localhost [IPv6:::1]) by balder.ntg.nl (Postfix) with ESMTP id 3E21210205; Tue, 25 Dec 2012 13:24:40 +0100 (CET) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 155C510205 for ; Tue, 25 Dec 2012 13:24:38 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id zV+WgQas6tNC for ; Tue, 25 Dec 2012 13:24:33 +0100 (CET) Original-Received: from filter1-til.mf.surf.net (filter1-til.mf.surf.net [194.171.167.217]) by balder.ntg.nl (Postfix) with ESMTP id 3EA7110203 for ; Tue, 25 Dec 2012 13:24:33 +0100 (CET) Original-Received: from smtp.ziggozakelijk.nl (D57D1DA2.static.ziggozakelijk.nl [213.125.29.162]) by filter1-til.mf.surf.net (8.14.3/8.14.3/Debian-9.4) with ESMTP id qBPCOWfn032739 for ; Tue, 25 Dec 2012 13:24:32 +0100 X-Default-Received-SPF: pass (skip=loggedin (res=PASS)) x-ip-name=10.100.1.100; Original-Received: from [10.100.1.100] (unverified [10.100.1.100]) by pragma-net.nl (SurgeMail 6.1c) with ESMTP (TLS) id 673-1713362 for multiple; Tue, 25 Dec 2012 13:24:29 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.2; rv:17.0) Gecko/17.0 Thunderbird/17.0 In-Reply-To: X-Authenticated-User: hagen@controller-9 X-Bayes-Prob: 0.0001 (Score 0, tokens from: @@RPTN) X-CanIt-Geo: ip=213.125.29.162; country=NL; region=16; city=Zeewolde; latitude=52.3302; longitude=5.5364; http://maps.google.com/maps?q=52.3302,5.5364&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 0RIDMowqk - 73030e4f4112 - 20121225 (trained as not-spam) X-Scanned-By: CanIt (www . roaringpenguin . com) on 194.171.167.217 X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.14 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ntg-context-bounces@ntg.nl Original-Sender: ntg-context-bounces@ntg.nl Xref: news.gmane.org gmane.comp.tex.context:80018 Archived-At: On 12/25/2012 9:36 AM, Roland Thiers wrote: > - when one create a table doing this : userdata=userdata or {}, is it > only to be sure that "userdata" is not actually a variable which exists > (with > a non nil value) ? Less safely we could write : userdata={} ? There can already be stuff in userdata that you don't want to loose. > - arguments for the user.data.table function are given as strings : " > #1" and changed in numbers in the body of the function. I noticed that > it was possible to > give numbers directly. is there always better to do like this ? (enter > strings et use tonumber) Depends on if you want to catch errors. Forgetting an argument (or an empty one) when a number is expected results in ,, which triggers a Lua error, while with ,"", you can intercept the empty string and default. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ 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 : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________