From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/86566 Path: news.gmane.org!not-for-mail From: Hans Hagen Newsgroups: gmane.comp.tex.context Subject: Re: Trimming strings and Lua string.trim question Date: Wed, 05 Mar 2014 09:24:08 +0100 Message-ID: <5316DF28.3070300@wxs.nl> References: <5316ABF3.5050302@rik.users.panix.com> Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1394007873 8359 80.91.229.3 (5 Mar 2014 08:24:33 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 5 Mar 2014 08:24:33 +0000 (UTC) To: ntg-context@ntg.nl Original-X-From: ntg-context-bounces@ntg.nl Wed Mar 05 09:24:35 2014 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from balder.ntg.nl ([5.39.185.229]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WL77v-0002dM-Di for gctc-ntg-context-518@m.gmane.org; Wed, 05 Mar 2014 09:24:31 +0100 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 928B0101F7; Wed, 5 Mar 2014 09:24:30 +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 NT0YhhbFbsXV; Wed, 5 Mar 2014 09:24:28 +0100 (CET) Original-Received: from balder.ntg.nl (localhost [IPv6:::1]) by balder.ntg.nl (Postfix) with ESMTP id 5D9EE101E9; Wed, 5 Mar 2014 09:24:28 +0100 (CET) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 0999B101E9 for ; Wed, 5 Mar 2014 09:24:27 +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 5KoHOgp1EMd1 for ; Wed, 5 Mar 2014 09:24:22 +0100 (CET) Original-Received: from filter4-til.mf.surf.net (filter4-til.mf.surf.net [194.171.167.220]) by balder.ntg.nl (Postfix) with ESMTP id D06D0101E1 for ; Wed, 5 Mar 2014 09:24:13 +0100 (CET) Original-Received: from smtp.ziggozakelijk.nl (D57D1DA2.static.ziggozakelijk.nl [213.125.29.162]) by filter4-til.mf.surf.net (8.14.3/8.14.3/Debian-9.4) with ESMTP id s258OC4o020907 for ; Wed, 5 Mar 2014 09:24:12 +0100 X-Default-Received-SPF: pass (skip=loggedin (res=PASS)) x-ip-name=10.100.1.103; Original-Received: from [10.100.1.103] (unverified [10.100.1.103]) by pragma-net.nl (SurgeMail 6.3c2) with ESMTP id 5503-1713362 for ; Wed, 05 Mar 2014 09:24:11 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 In-Reply-To: <5316ABF3.5050302@rik.users.panix.com> X-Authenticated-User: hagen@controller-9 X-Bayes-Prob: 0.0001 (Score 0, tokens from: ntg-context@ntg.nl, base:default, @@RPTN) X-CanIt-Geo: ip=213.125.29.162; country=NL; region=15; city=Zwolle; latitude=52.5058; longitude=6.0858; http://maps.google.com/maps?q=52.5058,6.0858&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 0VLxIoccM - dd7fe7b79dcd - 20140305 (trained as not-spam) X-Scanned-By: CanIt (www . roaringpenguin . com) on 194.171.167.220 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:86566 Archived-At: On 3/5/2014 5:45 AM, Rik Kabel wrote: > I am trying to strip all leading and trailing whitespace from a string. > I have tried two methods, neither of which is satisfactory. > > The first method uses \ignorespaces and \removeunwantedspaces. This > fails to strip leading and trailing newlines. > > The second method uses the Lua string.strip function. The wiki descriptio= n: > > Yields string with leading and trailing whitespace (spaces, > horizontal and vertical tabs, newlines) removed > > suggests that this should do what I want, but I find that it removes > internal whitespace as well as the leading and trailing whitespace. > > Can somebody suggest a better way of doing this? > > The following code demonstrates the problem: > > % macros=3Dmkvi > \starttexdefinition StringStrip #STRING > \startluacode > context(string.strip([=3D=3D[#STRING]=3D=3D])) > \stopluacode > \stoptexdefinition > \long\def\test{ > > This is a test. \quad > > And it has an unexpected result. > > With \tex{ignorespaces} and \tex{removeunwantedspaces}, the > newlines remain. > > With Lua {\tt string.strip}, the \tex{quad} at the end of a > paragraph is preserved, but the other internal whitespace > (including newlines) is gone! > > } > \starttext > \subject{ignorespaces and removeunwantedspaces} > =A6\ignorespaces\test\removeunwantedspaces=A6 > > \subject{Lua string.strip} > =A6\StringStrip{\test}=A6 > \stoptext striplong ----------------------------------------------------------------- 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 t= he Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-cont= ext webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________= ________