Re: Lua in LuaLaTeX is diferent??

[Jaroslav Hajtmar <hajtmar@gyza.cz>]

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
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