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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