* How to sort in Lua using locale?
@ 2010-07-12 10:30 Mojca Miklavec
2010-07-12 12:28 ` Hans Hagen
0 siblings, 1 reply; 2+ messages in thread
From: Mojca Miklavec @ 2010-07-12 10:30 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hello,
I would like to create a document using some functionality that is
pretty close to creating an index, but the built-in index creation
code doesn't suffice. My main question is: how do I sort strings using
the built-in sorting rules for the current language?
Here is an example with a table of names:
names = {
{first="Hans", last="Hagen"},
{first="Hartmut", last="Henkel"},
{first="Taco", last="Hoekwater"},
{first="Caron", last="Haček"}
{first="Ančka", last="Car"}
{first="Ana", last="Car"}
{first="Anita", last="Car"}
{first="Matija", last="Čop"}
}
and I want to print out the following:
\section{C}
\person{Car}{Ana}
\person{Car}{Ančka}
\person{Car}{Anita}
\section{Č}
\person{Čop}{Matija}
\section{H}
\person{Haček}{Caron}
\person{Hagen}{Hans}
\person{Henkel}{Hartmut}
\person{Hoekwater}{Taco}
The following code works for English and needs a fix to respect local
sorting rules. I would be grateful for any hint before reinventing the
wheel (the hint can also be a pointer to the right line of ConTeXt
source code that does the sorting; I was a bit lost in the code).
\mainlanguage[sl]
\setuphead[section][style=\bf,before=\blank,after=,number=no]
\def\person#1#2{\hbox{{\sc #1}, #2}}
\starttext
Code that needs fixing:
\startluacode
names = {
{first="Hans", last="Hagen"},
{first="Hartmut", last="Henkel"},
{first="Taco", last="Hoekwater"},
{first="Caron", last="Haček"},
{first="Ančka", last="Car"},
{first="Ana", last="Car"},
{first="Anita", last="Car"},
{first="Matija", last="Čop"},
}
-- this should sort with local sorting rules; how?
function sort_names(a,b)
if (a.last == b.last) then
return a.first<b.first
else
return a.last<b.last
end
end
-- this is extremely ugly and needs to be fixed
-- with some UTF-8 library
function first_letter(str)
if (string.byte(str,1)>127) then
return string.sub(str,1,2)
else
return string.sub(str,1,1)
end
end
table.sort(names, sort_names)
for k,v in pairs(names) do
-- nested tables would also be an option; but are not required
if (k==1) or (k>1 and (first_letter(names[k-1].last) ~=
first_letter(v.last))) then
tex.print(string.format('\\section{%s}', first_letter(v.last)))
end
tex.print(string.format('\\person{%s}{%s}', v.last, v.first))
end
\stopluacode
\crlf\crlf
Desired result:
\section{C}
\person{Car}{Ana}
\person{Car}{Ančka}
\person{Car}{Anita}
\section{Č}
\person{Čop}{Matija}
\section{H}
\person{Haček}{Caron}
\person{Hagen}{Hans}
\person{Henkel}{Hartmut}
\person{Hoekwater}{Taco}
\stoptext
Thanks a lot,
Mojca
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: How to sort in Lua using locale?
2010-07-12 10:30 How to sort in Lua using locale? Mojca Miklavec
@ 2010-07-12 12:28 ` Hans Hagen
0 siblings, 0 replies; 2+ messages in thread
From: Hans Hagen @ 2010-07-12 12:28 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Mojca Miklavec
On 12-7-2010 12:30, Mojca Miklavec wrote:
> Hello,
>
> I would like to create a document using some functionality that is
> pretty close to creating an index, but the built-in index creation
> code doesn't suffice. My main question is: how do I sort strings using
> the built-in sorting rules for the current language?
\startluacode
document.whatever = { names = { } }
function document.whatever.sortnames()
local names = document.whatever.names
local split = sorters.splitters.utf
for i=1,#names do
local name = names[i]
name.split = {
split(name.last),
split(name.first),
}
end
sorters.sort(names, sorters.comparers.basic)
end
function document.whatever.flushnames()
local names = document.whatever.names
local previous = false
for i=1,#names do
local name = names[i]
local letter, current = sorters.firstofsplit(name)
if previous ~= current then
previous = current
context.section(letter)
end
context.person(name.last,name.first)
end
end
document.whatever.names = {
{ first = "Hans", last = "Hagen" },
{ first = "Hartmut", last = "Henkel" },
{ first = "Taco", last = "Hoekwater" },
{ first = "Caron", last = "Haček" },
{ first = "Ančka", last = "Car" },
{ first = "Ana", last = "Car" },
{ first = "Anita", last = "Car" },
{ first = "Matija", last = "Čop" },
}
sorters.setlanguage("sl")
document.whatever.sortnames()
document.whatever.flushnames()
\stopluacode
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___________________________________________________________________________________
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
___________________________________________________________________________________
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