From: Khaled Hosny <khaledhosny@eglug.org>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: why nil argument
Date: Sun, 14 Nov 2010 21:27:27 +0200 [thread overview]
Message-ID: <20101114192727.GA21403@khaled-laptop> (raw)
In-Reply-To: <2770E777-778C-49BC-86EF-52A65444E21C@uva.nl>
On Sun, Nov 14, 2010 at 06:55:20PM +0100, Hans van der Meer wrote:
> In transforming dates through a Lua-call I get a nil error I do not understand.
>
> The luatex code =
> \startluacode
> hvdm = hvdm or {}
> require "lpeg"
> -- Transform date in Lua from yyyymmdd to dd-mm-yyyy with checks
> hvdm.day = lpeg.R("02") * lpeg.R("09") + lpeg.P("30") + lpeg.P("31") - lpeg.P("00")
> hvdm.month = lpeg.P("0") * lpeg.R("19") + lpeg.P("10") + lpeg.P("11") + lpeg.P("12")
> hvdm.year = lpeg.R("12") * lpeg.R("09") * lpeg.R("09") * lpeg.R("09")
> hvdm.date = lpeg.C(hvdm.year) * lpeg.C(hvdm.month) * lpeg.C(hvdm.day) * -1 / "%3-%2-%1"
> \stopluacode
> \def\FormatDate#1{\ctxlua{tex.print(tostring(hvdm.date:match(#1)))}}
>
> Calling \FormatDate(1) is OK although it returns "nil" (correct would be #1 = 20101114
> Calling \FormatDate(A) is not OK with the error:
You are passing a undefined variable, A. Your argument should be quoted:
hvdm.date:match("#1")
Regards,
Khaled
--
Khaled Hosny
Arabic localiser and member of Arabeyes.org team
Free font developer
___________________________________________________________________________________
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
___________________________________________________________________________________
next prev parent reply other threads:[~2010-11-14 19:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-14 17:55 Hans van der Meer
2010-11-14 19:27 ` Khaled Hosny [this message]
2010-11-14 19:47 ` Hans van der Meer
2010-11-14 19:53 ` Khaled Hosny
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20101114192727.GA21403@khaled-laptop \
--to=khaledhosny@eglug.org \
--cc=ntg-context@ntg.nl \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).