Re: Lua in LuaLaTeX is diferent??

[Khaled Hosny <khaledhosny@eglug.org>]

On Sun, Jun 06, 2010 at 01:35:23AM +0200, Jaroslav Hajtmar wrote:
> Hi,
> 
> I am sending examples of functions:
> 
> The first function is functional in ConTeXt MKIV even LuaLaTeX.
> 
> -- Global variables for setup in library (it be used when glob. vars
> Sep, Ld, Rd is not setting in main aplication):
> UserCSVSeparator=';'
> UserCSVLeftDelimiter=''
> UserCSVRightDelimiter=''
> 
> 
> 
> 
> function ParseCSVdata(s)
>     local Sep = (Sep == nil) and UserCSVSeparator or Sep
>     local Ld = (Ld == nil) and UserCSVLeftDelimiter or Ld
>     local Rd = (Rd == nil) and UserCSVRightDelimiter or Rd
>     if Ld ~= '' or Rd ~= '' then
>        local s=string.sub(s, string.find(s, Ld)+1, string.find(s,
> Rd,-1)-1)
>     end
>     local fieldsep=tostring(Rd..Sep..Ld)
>     local result = {}
>   local from  = 1
>   local sep_from, sep_to = string.find( s, fieldsep, from  )
>   while sep_from do
>     table.insert( result, string.sub( s, from , sep_from-1 ) )
>     from  = sep_to + 1
>     sep_from, sep_to = string.find( s, fieldsep, from  )
>   end
>   table.insert( result, string.sub( s, from  ) )
>   return result
> end
> 
> 
> The second is more universal, but it only works in ConTeXt MKIV.
> LuaLaTeX report error:  "attempt to call field 'split' (a nil value) ... ."
> 
> function ParseCSVdata(string2parse, separator, leftdelimiter,
> rightdelimiter)
>     Sep = (Sep == nil) and UserCSVSeparator or Sep
>     Ld = (Ld == nil) and UserCSVLeftDelimiter or Ld
>     Rd = (Rd == nil) and UserCSVRightDelimiter or Rd
>   local separator = (separator == nil) and Sep or separator
>     local leftdelimiter = (leftdelimiter == nil) and Ld or leftdelimiter
>     local rightdelimiter = (rightdelimiter == nil) and Rd or rightdelimiter
>     local result={}
>         if leftdelimiter ~= '' and rightdelimiter ~= '' then
>             string.gsub(string2parse,
> leftdelimiter.."(.-)"..rightdelimiter, function(a)
> table.insert(result,a) end )
>         else
>           result=string.split(string2parse,separator)
>         end
>     return result
> end
> 
> 
> I would like to benefit from the second function, but I want the
> application was applicable even LuaLaTeX

You need the lualibs package, which imports some of the extended lua
librarires from ConTeXt, since string.split() is not a standad lua
function.

Regards,
 Khaled


> 
> Thanx Jaroslav
> 
> 
> 
> 
> Dne 5.6.2010 22:19, Jaroslav Hajtmar napsal(a):
> >Hi,
> >I did a Lua application for ConTeXt, and now I wanted to adapt it
> >to work even LuaLaTeX.
> >On what needs to be careful? Compiling  by LuaLaTeX specific
> >messages appear as if the Lua in LuaLaTeX didnt know some Lua
> >commands (i.e. split, find .... ).
> >
> >On what needs to be careful generaly when programming applications
> >for LuaLaTeX?
> >
> >Thanx Jaroslav
> >___________________________________________________________________________________
> >
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> >
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> >
> >
> 
> ___________________________________________________________________________________
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> 
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> ___________________________________________________________________________________

-- 
 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
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