* Tabulator in database file not passed to Lua
@ 2014-01-23 20:43 Joshua Krämer
2014-01-23 22:17 ` Hans Hagen
0 siblings, 1 reply; 4+ messages in thread
From: Joshua Krämer @ 2014-01-23 20:43 UTC (permalink / raw)
To: ntg-context-wvrSQK3plZs
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
___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Tabulator in database file not passed to Lua
2014-01-23 20:43 Tabulator in database file not passed to Lua Joshua Krämer
@ 2014-01-23 22:17 ` Hans Hagen
2014-01-25 0:32 ` Joshua Krämer
0 siblings, 1 reply; 4+ messages in thread
From: Hans Hagen @ 2014-01-23 22:17 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 1/23/2014 9:43 PM, Joshua Krämer wrote:
> 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?
\starttext
\startluacode
local f = io.open("test.dat")
for line in f:lines() do
local t = string.split(line,";") -- or "\t" for tabs
context("% /t",t) -- context(table.concat(t," / ")
context.par()
end
\stopluacode
\stoptext
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Tabulator in database file not passed to Lua
2014-01-25 0:32 ` Joshua Krämer
@ 2014-01-25 0:23 ` Hans Hagen
0 siblings, 0 replies; 4+ messages in thread
From: Hans Hagen @ 2014-01-25 0:23 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 1/25/2014 1:32 AM, Joshua Krämer wrote:
> Am Thu, 23 Jan 2014 23:17:24 +0100
> schrieb Hans Hagen <pragma@wxs.nl>:
>> \startluacode
>>
>> local f = io.open("test.dat")
>>
>> for line in f:lines() do
>> local t = string.split(line,";") -- or "\t" for tabs
>> context("% /t",t) -- context(table.concat(t," / ")
>> context.par()
>> end
>>
>> \stopluacode
>>
>> \stoptext
>
> Thanks, I was not aware of the Context Lua extensions. Should have read
> the wiki more thoroughly ...
>
> While I'm new to Lua, I already enjoy it. It opens a whole new world
> of possibilities to ConTeXt, making this great software even better!
> Thank you very much for all the hard work.
http://www.pragma-ade.nl/general/manuals/cld-mkiv.pdf
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Tabulator in database file not passed to Lua
2014-01-23 22:17 ` Hans Hagen
@ 2014-01-25 0:32 ` Joshua Krämer
2014-01-25 0:23 ` Hans Hagen
0 siblings, 1 reply; 4+ messages in thread
From: Joshua Krämer @ 2014-01-25 0:32 UTC (permalink / raw)
To: ntg-context-wvrSQK3plZs
Am Thu, 23 Jan 2014 23:17:24 +0100
schrieb Hans Hagen <pragma@wxs.nl>:
> \startluacode
>
> local f = io.open("test.dat")
>
> for line in f:lines() do
> local t = string.split(line,";") -- or "\t" for tabs
> context("% /t",t) -- context(table.concat(t," / ")
> context.par()
> end
>
> \stopluacode
>
> \stoptext
Thanks, I was not aware of the Context Lua extensions. Should have read
the wiki more thoroughly ...
While I'm new to Lua, I already enjoy it. It opens a whole new world
of possibilities to ConTeXt, making this great software even better!
Thank you very much for all the hard work.
Kind regards,
Joshua Krämer
___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 4+ messages in thread
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2014-01-23 22:17 ` Hans Hagen
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