Dear list,
I use the database module to load the lines of a file with some
data. The lines are then separated with a lua script. I use lua,
because I need to do some other things with the data (rounding
numbers, combining some fields etc.) Please consider the following
minimal working example:
\usemodule[database]
\defineseparatedlist [Data]
[
before=,
after=,
separator={},
commentchar=\letterpercent,
command=\Tabrow,
]
\startluacode
function explode(sep,str)
if (sep=="") then return false end
local pos,arr = 0,{}
-- for each separator found
for st,sp in function() return string.find(str,sep,pos,true) end do
-- Attach chars left of current separator
table.insert(arr,string.sub(str,pos,st-1))
-- Jump past current separator
pos = sp + 1
end
-- Attach chars right of last separator
table.insert(arr,string.sub(str,pos))
return arr
end
function tabrow(fileline)
local tabarray = explode(";",fileline)
local tabline = ""
for index,value in ipairs(tabarray) do
tabline = tabline .. " / " .. value
end
return tabline
end
\stopluacode
\define[1]\Tabrow{\ctxlua{context(tabrow("#1"))}}
\starttext
\processseparatedfile[Data][Test.dat]
\stoptext
This is the content of the file Test.dat:
Eins;zwei;drei;vier
Of course the line separation could be done easier with the database
module. However, I thought this way I could use the tabulator as the
separator in my file. But when I change the separator from ";" to
"\\t", it doesn't work. I suppose this is because the tabulators are
passed to Lua as spaces. Or is "\\t" the wrong code? Would it be
possible to use tabulators as separators, if I load the file with lua
and not with the database module?
Kind regards,
Joshua Krämer
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