Re: How to process simple HTML files with LuaTeX

[Aditya Mahajan <adityam@umich.edu>]

On Sun, 16 Sep 2007, Mojca Miklavec wrote:

> On 9/14/07, Hans Hagen <pragma@wxs.nl> wrote:

>> mojcasentities = {
>>         nbsp = " ",
>>         le   = "'\\mathematics{\\le}'
>> }
>>
>> local d[k]= d[k]:gsub("&(.-);",mojcasentities)
>
> Yes, I saw it, but didn't try to understand what the &(.-) serves for.

(Caveat: I do not really know lua regex, and have not tried out the 
code)

Assuming lua follows standard regex syntax, this means

& # The letter &
( # start a group
. # any character
- # As few as needed
) # end group
; # the letter ;

so this will match all entities.

If it helps, the equivalent vim regex will be
\&\(.\{-}\);

I guess that $1 (the first group, that is everything that matches .-) 
will be compared with mojcaentities table and replaced accordingly. 
This looks like a really nice feature of lua. In Ruby and Vim, I often 
find myself writing a bunch of similar regex, and always wished there 
was something like what lua does.

Aditya
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