Re: [NTG-context] Lua in LuaLaTeX is diferent??

5 Jun 2010

      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

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
___________________________________________________________________________________
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
___________________________________________________________________________________