[NTG-context] separatedlist with header repeating processing csv to table

[NTG-context] separatedlist with header repeating processing csv to table

[juh+ntg-context--- via ntg-context]

Dear all,

some years ago I asked about how to process a csv file in a table with 
repeating headers on following pages, but got no answer.

https://www.mail-archive.com/ntg-context@ntg.nl/msg98903.html

Now I am again working on this problem.

I wonder if there is a better way to process csv files to a table with 
more flexibility?

Or do I simply miss the switch to mark the first row in the csv file as 
the header that has to repeat?

TIA
juh
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[NTG-context] Re: separatedlist with header repeating processing csv to table

[Henning Hraban Ramm]

Am 02.10.24 um 09:48 schrieb juh+ntg-context--- via ntg-context:
> Dear all,
> 
> some years ago I asked about how to process a csv file in a table with 
> repeating headers on following pages, but got no answer.
> 
> https://www.mail-archive.com/ntg-context@ntg.nl/msg98903.html
> 
> Now I am again working on this problem.
> 
> I wonder if there is a better way to process csv files to a table with 
> more flexibility?
> 
> Or do I simply miss the switch to mark the first row in the csv file as 
> the header that has to repeat?

Did you try split=repeat instead of split=yes?

Hraban
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[NTG-context] Re: separatedlist with header repeating processing csv to table

[Henning Hraban Ramm]

Am 02.10.24 um 13:49 schrieb Henning Hraban Ramm:
> Am 02.10.24 um 09:48 schrieb juh+ntg-context--- via ntg-context:
>> Dear all,
>>
>> some years ago I asked about how to process a csv file in a table with 
>> repeating headers on following pages, but got no answer.
>>
>> https://www.mail-archive.com/ntg-context@ntg.nl/msg98903.html
>>
>> Now I am again working on this problem.
>>
>> I wonder if there is a better way to process csv files to a table with 
>> more flexibility?
>>
>> Or do I simply miss the switch to mark the first row in the csv file 
>> as the header that has to repeat?
> 
> Did you try split=repeat instead of split=yes?

Oh, and of course you need a \bTABLEhead, otherwise there’s nothing to 
repeat.
That means AFAIK, the header can’t be part of the CSV, using this simple 
module.

Hraban
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[NTG-context] Re: separatedlist with header repeating processing csv to table

[juh+ntg-context--- via ntg-context]

Am 02.10.24 um 13:49 schrieb Henning Hraban Ramm:

> 
> Did you try split=repeat instead of split=yes?

Yes. No change.

I guess that the first line  in csv is not marked as a table header, so 
that ConTeXt does not know what to repeat.

juh

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[NTG-context] Re: separatedlist with header repeating processing csv to table

[juh+ntg-context--- via ntg-context]

Am 02.10.24 um 14:29 schrieb Henning Hraban Ramm:
> Oh, and of course you need a \bTABLEhead, otherwise there’s nothing to 
> repeat.
> That means AFAIK, the header can’t be part of the CSV, using this simple 
> module.

I tried to put the header into the before part of setupseparatedlist, 
but this does not work. I also fear that I cannot do it with this 
module. Are there other means to build a table from csv?

juh
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[NTG-context] Re: separatedlist with header repeating processing csv to table

[vm via ntg-context]

On 03/10/2024 10:49, juh+ntg-context--- via ntg-context wrote:
> 
> I tried to put the header into the before part of setupseparatedlist, 
> but this does not work. I also fear that I cannot do it with this 
> module. Are there other means to build a table from csv?


have you checked the handlecsv module?


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[NTG-context] Re: separatedlist with header repeating processing csv to table

[Wolfgang Schuster]

juh+ntg-context--- via ntg-context schrieb am 03.10.2024 um 10:49:
> Am 02.10.24 um 14:29 schrieb Henning Hraban Ramm:
>> Oh, and of course you need a \bTABLEhead, otherwise there’s nothing to 
>> repeat.
>> That means AFAIK, the header can’t be part of the CSV, using this 
>> simple module.
> 
> I tried to put the header into the before part of setupseparatedlist, 
> but this does not work. I also fear that I cannot do it with this 
> module. Are there other means to build a table from csv?

ConTeXt has a better parser for csv files since many years (which is 
used by the already mentioned handlecsv module) but there is no TeX 
interface for it.

The example below shows how the parser can be used to store csv data in 
a Lua table, you can even split of the first line of data to use it as 
header etc.

Afterwards you can use a loop to create a TeX table out of the stored 
Lua table.

%%%% begin example
\setuplayout[tight]

\setuppapersize[A8,landscape]

\starttext

\startbuffer[cattle]
"Year","Cattle, total","Dairy cows"
"2009","3968","1489"
"2010","3975","1479"
"2011","3885","1470"
"2012","3879","1484"
"2013","4000","1553"
"2014","4068","1572"
"2015","4134","1622"
"2016","4251","1745"
"2017","4096","1694"
\stopbuffer

% \savebuffer [list=cattle,prefix=no,file=cattle.csv]

\startluacode

local csvsplitter = utilities.parsers.rfc4180splitter()

local tablecontent, tableheader = 
csvsplitter(buffers.getcontent("cattle"),true)
-- local tablecontent, tableheader = 
csvsplitter(io.loaddata("cattle.csv"),true)

context.bTABLE{ split = "repeat" }
   context.bTABLEhead()
     context.bTR()
       for _, tablecell in next, tableheader do
         context.bTH()
         context(tablecell)
         context.eTH()
       end
     context.eTR()
   context.eTABLEhead()
   context.bTABLEbody()
     for _, tablerow in next, tablecontent do
       context.bTR()
         for _, tablecell in next, tablerow do
           context.bTD()
           context(tablecell)
           context.eTD()
         end
       context.eTR()
     end
   context.eTABLEbody()
context.eTABLE()

\stopluacode

\stoptext
%%%% end example

Wolfgang
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[NTG-context] Re: separatedlist with header repeating processing csv to table

[vm via ntg-context]

On 03/10/2024 14:15, Wolfgang Schuster wrote:
> Afterwards you can use a loop to create a TeX table out of the stored 
> Lua table.

just the freshup the mind,
how do you include a \setupTABLE in the lua section?
like
\setupTABLE[r][first][background=color, backgroundcolor=yellow]



.F
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[NTG-context] Re: separatedlist with header repeating processing csv to table

[Wolfgang Schuster]

vm via ntg-context schrieb am 03.10.2024 um 16:33:
>
>
> On 03/10/2024 14:15, Wolfgang Schuster wrote:
>> Afterwards you can use a loop to create a TeX table out of the stored 
>> Lua table.
>
> just the freshup the mind,
> how do you include a \setupTABLE in the lua section?
> like
> \setupTABLE[r][first][background=color, backgroundcolor=yellow]

You write it as

context.setupTABLE({"r"}, {"first"}, {background="color", 
backgroundcolor="yellow"})

When there is only a single argument with brackets you can omit () but 
not in this case where the command takes multiple argument.

For more information about TeX commands in Lua take a look at the 
"ConTeXt Lua document" (cld-mkiv.pdf) manual.

Wolfgang

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[NTG-context] configuring spitter (was: separatedlist with header repeating processing csv to table)

[juh+ntg-context--- via ntg-context]

Am 03.10.24 um 14:15 schrieb Wolfgang Schuster:

> %%%% begin example
> \setuplayout[tight]
> 
> \setuppapersize[A8,landscape]
> 
> \starttext
> 
> \startbuffer[cattle]
> "Year","Cattle, total","Dairy cows"
> "2009","3968","1489"
> "2010","3975","1479"
> "2011","3885","1470"
> "2012","3879","1484"
> "2013","4000","1553"
> "2014","4068","1572"
> "2015","4134","1622"
> "2016","4251","1745"
> "2017","4096","1694"
> \stopbuffer
> 
> % \savebuffer [list=cattle,prefix=no,file=cattle.csv]
> 
> \startluacode
> 
> local csvsplitter = utilities.parsers.rfc4180splitter()
> 
> local tablecontent, tableheader = 
> csvsplitter(buffers.getcontent("cattle"),true)
> -- local tablecontent, tableheader = 
> csvsplitter(io.loaddata("cattle.csv"),true)
> 
> context.bTABLE{ split = "repeat" }
>    context.bTABLEhead()
>      context.bTR()
>        for _, tablecell in next, tableheader do
>          context.bTH()
>          context(tablecell)
>          context.eTH()
>        end
>      context.eTR()
>    context.eTABLEhead()
>    context.bTABLEbody()
>      for _, tablerow in next, tablecontent do
>        context.bTR()
>          for _, tablecell in next, tablerow do
>            context.bTD()
>            context(tablecell)
>            context.eTD()
>          end
>        context.eTR()
>      end
>    context.eTABLEbody()
> context.eTABLE()
> 
> \stopluacode
> 
> \stoptext
> %%%% end example

This works perfectly with commas and doublequotes. Is it possible to 
configure the splitter so that it works with semicolons as column 
separator and no char as data separator?

Something like:

foo;bar;baz
second foo; second bar; second baz

TIA
juh

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[NTG-context] Re: configuring spitter

[Henning Hraban Ramm]

Am 08.10.24 um 18:13 schrieb juh+ntg-context--- via ntg-context:
> This works perfectly with commas and doublequotes. Is it possible to 
> configure the splitter so that it works with semicolons as column 
> separator and no char as data separator?
> 
> Something like:
> 
> foo;bar;baz
> second foo; second bar; second baz

Use the source, juh!

In
https://source.contextgarden.net/tex/context/base/mkiv/util-prs.lua?search=rfc4180splitter#l580
you can find that rfc4180splitter takes a "specification" parameter that 
looks like { separator = ",", quote = '"' }.

I didn’t check if it works without quote character.

Hraban
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[NTG-context] Re: configuring spitter

[Wolfgang Schuster]

juh+ntg-context@mailbox.org schrieb am 08.10.2024 um 18:13:
> Am 03.10.24 um 14:15 schrieb Wolfgang Schuster:
> 
>> %%%% begin example
>> \setuplayout[tight]
>>
>> \setuppapersize[A8,landscape]
>>
>> \starttext
>>
>> \startbuffer[cattle]
>> "Year","Cattle, total","Dairy cows"
>> "2009","3968","1489"
>> "2010","3975","1479"
>> "2011","3885","1470"
>> "2012","3879","1484"
>> "2013","4000","1553"
>> "2014","4068","1572"
>> "2015","4134","1622"
>> "2016","4251","1745"
>> "2017","4096","1694"
>> \stopbuffer
>>
>> % \savebuffer [list=cattle,prefix=no,file=cattle.csv]
>>
>> \startluacode
>>
>> local csvsplitter = utilities.parsers.rfc4180splitter()
>>
>> local tablecontent, tableheader = 
>> csvsplitter(buffers.getcontent("cattle"),true)
>> -- local tablecontent, tableheader = 
>> csvsplitter(io.loaddata("cattle.csv"),true)
>>
>> context.bTABLE{ split = "repeat" }
>>    context.bTABLEhead()
>>      context.bTR()
>>        for _, tablecell in next, tableheader do
>>          context.bTH()
>>          context(tablecell)
>>          context.eTH()
>>        end
>>      context.eTR()
>>    context.eTABLEhead()
>>    context.bTABLEbody()
>>      for _, tablerow in next, tablecontent do
>>        context.bTR()
>>          for _, tablecell in next, tablerow do
>>            context.bTD()
>>            context(tablecell)
>>            context.eTD()
>>          end
>>        context.eTR()
>>      end
>>    context.eTABLEbody()
>> context.eTABLE()
>>
>> \stopluacode
>>
>> \stoptext
>> %%%% end example
> 
> This works perfectly with commas and doublequotes. Is it possible to 
> configure the splitter so that it works with semicolons as column 
> separator and no char as data separator?

I don't know what you mean with data separator but the quote marks are 
optional and only needed when the column entry contains the column 
separator itself. In my example all double quotes except the one for 
"Cattle, total" are redundant and can be removed.

> Something like:
> 
> foo;bar;baz
> second foo; second bar; second baz


You can change the separator when you create a custom splitter.

local csvsplitter = utilities.parsers.rfc4180splitter{ separator = ";" }

Wolfgang
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[NTG-context] Re: configuring spitter

[juh+ntg-context--- via ntg-context]

Am 08.10.24 um 19:16 schrieb Wolfgang Schuster:
> You can change the separator when you create a custom splitter.
> 
> local csvsplitter = utilities.parsers.rfc4180splitter{ separator = ";" }

Thanks a lot.

Just curious. I often wonder in pure ConTeXt when to use curly bracets 
and when square brackets

In this lua code I would think we would need simple rounded ones.

Like in your first example where you call the splitter without options:

local csvsplitter = utilities.parsers.rfc4180splitter()

I am sure that this is some lua convention, but, nevertheless, it 
puzzles me.

Ciao!
juh
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[NTG-context] Re: configuring spitter

[Wolfgang Schuster]

juh+ntg-context@mailbox.org schrieb am 08.10.2024 um 20:10:
> Am 08.10.24 um 19:16 schrieb Wolfgang Schuster:
>> You can change the separator when you create a custom splitter.
>>
>> local csvsplitter = utilities.parsers.rfc4180splitter{ separator = ";" }
> 
> Thanks a lot.
> 
> Just curious. I often wonder in pure ConTeXt when to use curly bracets 
> and when square brackets
> 
> In this lua code I would think we would need simple rounded ones.
> 
> Like in your first example where you call the splitter without options:
> 
> local csvsplitter = utilities.parsers.rfc4180splitter()
> 
> I am sure that this is some lua convention, but, nevertheless, it 
> puzzles me.


It's explained in the Lua manual:

%%%% begin quotation
Lua 5.4 Reference manual

[...]

3.4.10 -- Function calls

[...]
A call of the form f{fields} is syntactic sugar for f({fields}); that 
is, the argument list is a single new table.
[...]
%%%% end quotation

Wolfgang
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