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.\" ========================================================================
.\"
.IX Title "I18N::Collate 3"
.TH I18N::Collate 3 "2019-10-24" "perl v5.30.2" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
I18N::Collate \- compare 8\-bit scalar data according to the current locale
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 4
\& use I18N::Collate;
\& setlocale(LC_COLLATE, \*(Aqlocale\-of\-your\-choice\*(Aq);
\& $s1 = I18N::Collate\->new("scalar_data_1");
\& $s2 = I18N::Collate\->new("scalar_data_2");
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
.Vb 1
\& ***
\&
\& WARNING: starting from the Perl version 5.003_06
\& the I18N::Collate interface for comparing 8\-bit scalar data
\& according to the current locale
\&
\& HAS BEEN DEPRECATED
\&
\& That is, please do not use it anymore for any new applications
\& and please migrate the old applications away from it because its
\& functionality was integrated into the Perl core language in the
\& release 5.003_06.
\&
\& See the perllocale manual page for further information.
\&
\& ***
.Ve
.PP
This module provides you with objects that will collate
according to your national character set, provided that the
\&\s-1POSIX\s0 \fBsetlocale()\fR function is supported on your system.
.PP
You can compare \f(CW$s1\fR and \f(CW$s2\fR above with
.PP
.Vb 1
\& $s1 le $s2
.Ve
.PP
to extract the data itself, you'll need a dereference: $$s1
.PP
This module uses \fBPOSIX::setlocale()\fR. The basic collation conversion is
done by \fBstrxfrm()\fR which terminates at \s-1NUL\s0 characters being a decent C
routine. \fBcollate_xfrm()\fR handles embedded \s-1NUL\s0 characters gracefully.
.PP
The available locales depend on your operating system; try whether
\&\f(CW\*(C`locale \-a\*(C'\fR shows them or man pages for \*(L"locale\*(R" or \*(L"nlsinfo\*(R" or the
direct approach \f(CW\*(C`ls /usr/lib/nls/loc\*(C'\fR or \f(CW\*(C`ls /usr/lib/nls\*(C'\fR or
\&\f(CW\*(C`ls /usr/lib/locale\*(C'\fR. Not all the locales that your vendor supports
are necessarily installed: please consult your operating system's
documentation and possibly your local system administration. The
locale names are probably something like \f(CW\*(C`xx_XX.(ISO)?8859\-N\*(C'\fR or
\&\f(CW\*(C`xx_XX.(ISO)?8859N\*(C'\fR, for example \f(CW\*(C`fr_CH.ISO8859\-1\*(C'\fR is the Swiss (\s-1CH\s0)
variant of French (fr), \s-1ISO\s0 Latin (8859) 1 (\-1) which is the Western
European character set.