From: "Meer, Hans van der" <H.vanderMeer@uva.nl>
To: NTG ConTeXt <ntg-context@ntg.nl>
Subject: Re: xml expression error
Date: Thu, 28 Apr 2016 21:12:22 +0000 [thread overview]
Message-ID: <F4C14258-66F0-492D-BE87-326F52DDE45F@uva.nl> (raw)
In-Reply-To: <6fdc9bcd-6249-1d6d-ba10-8bc994b39ab8@gmx.es>
> On 28 Apr 2016, at 22:13, Pablo Rodriguez <oinos@gmx.es> wrote:
>
> On 04/28/2016 05:06 PM, dr. Hans van der Meer wrote:
>> Why is there anexpression error here? I would expect that the expression
>> number(-10000101) evaluates to a negative number taking part in the
>> comparsion. It looks as if the minus sign is not seen as an unary minus,
>> while -10000101 should have be evaluated by Lua's tonumber(-10000101).
>>
>> relevant code snippet is:
>> \xmlfilter{#1}{lpath[number(@date) <= number(-10000101)]/command(...)
>
> Sorry, Hans, I guess my question will be stupid, but why don’t use
> "tonumber(-10000101)"?
It is convenient to use positive numbers for dates after the year 0: AD = Anno Domine,
and negative numbers for years before: BC = Before Christ.
Comparing dates is easy in both eras.
>
> I wouldn’t get it, even with a minimal sample, but xml-mkiv.pdf includes
> the shortcut for this function.
>
> Just in case it might even help ;-),
Has to wait until tomorrow, because it is already late in the evening.
Hans van der Meer
___________________________________________________________________________________
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:[~2016-04-28 21:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-28 15:06 dr. Hans van der Meer
2016-04-28 20:13 ` Pablo Rodriguez
2016-04-28 21:12 ` Meer, Hans van der [this message]
2016-04-29 13:04 ` Meer, Hans van der
2016-05-12 11:49 ` Meer, Hans van der
2016-05-12 22:10 ` Hans Hagen
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=F4C14258-66F0-492D-BE87-326F52DDE45F@uva.nl \
--to=h.vandermeer@uva.nl \
--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).