From: "Thomas A. Schmitz" <thomas.schmitz@uni-bonn.de>
To: mailing ConTeXt users list for <ntg-context@ntg.nl>
Subject: lua questions
Date: Thu, 22 Jan 2009 22:24:28 +0100 [thread overview]
Message-ID: <8FF223F7-EFDC-43BD-8765-CBB15A03DBAD@uni-bonn.de> (raw)
Hi all,
this is a bit OT and should probably go to a lua list, but since some
people here are very proficient in lua and I feel less embarrassed
about noob questions here... I have a half-functioning python script
to convert entries from a classics database into the bibtex format. I
want to rewrite it in lua and make it more functional. Three little
problems/questions:
1. I found a script to convert Roman numerals via lpeg here: http://lua-users.org/wiki/LpegRecipes
but it uses the syntax lpeg.Ca which my lpeg doesn't recognize and
which I can't find in the lpeg manual. According to a talk by Roberto
Ierusalimschy, "lpeg.Ca(patt) - "accumulates" the nested captures." (http://www.inf.puc-rio.br/~roberto/lpeg/slides-lpeg-workshop2008.pdf
) Is this obsolete, has it been replaced by anything?
2. How can I check if a string begins with a class of words "(Der |Die
|Das |The |An )" etc. and strip these words from the string? I do it
with a compiled regexp in python, but "Programming in lua" has this to
say: "Unlike some other systems, in Lua a modifier can only be applied
to a character class; there is no way to group patterns under a
modifier. For instance, there is no pattern that matches an optional
word (unless the word has only one letter). Usually you can circumvent
this limitation using some of the advanced techniques that we will see
later." I haven't found these techniques yet.
3. How can I compare strings with utf8 characters? My naive approach
if string.find(record, "Résumé")
doesn't appear to work (while the same method does work if the string
has only ASCII characters).
Sorry if this is OT, and I'll be grateful for any pointers.
Thomas
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next reply other threads:[~2009-01-22 21:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-22 21:24 Thomas A. Schmitz [this message]
2009-01-23 11:13 ` Hans Hagen
2009-01-23 13:04 ` Thomas A. Schmitz
2009-01-29 12:35 ` Thomas A. Schmitz
2009-01-29 12:42 ` Taco Hoekwater
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