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package Lingua::NO::Syllable; |
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use strict; |
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use warnings; |
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use utf8; |
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use feature 'unicode_strings'; |
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require Exporter; |
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use Unicode::Normalize; |
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our @ISA = qw/ Exporter /; |
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our @EXPORT = qw/ syllable syllables /; |
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our @VOWELS = qw( a e i o u y æ ø å ); |
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=encoding utf-8 |
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=head1 NAME |
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Lingua::NO::Syllable - Count the number of syllables in Norwegian words. |
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=head1 VERSION |
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Version 0.04. |
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=cut |
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our $VERSION = '0.04'; |
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=head1 SYNOPSIS |
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use Lingua::NO::Syllable; |
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my $count = syllables( 'Tyrannosaurus' ); # 5, because: |
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# Tyr-ann-o-sau-rus |
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=head1 DESCRIPTION |
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C estimates the number of syllables in |
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the C<$word> passed to it. It's an estimate, because the algorithm is quick |
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and dirty, non-alpha characters aren't considered etc. Don't expect this |
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module to give you a 100% correct answer. |
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As the Norwegian and the Danish languages are quite similar, at least written, |
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this module might work for the Danish language as well. |
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=cut |
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sub syllable { |
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return syllables( @_ ); |
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} |
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sub syllables { |
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my $word = shift // ''; |
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# Remove surrounding spaces. |
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$word =~ s/^\s+//; |
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$word =~ s/\s+$//; |
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# If the word is one character long, consider it to contain only one |
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# syllable. |
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return 1 if ( length($word) == 1 ); |
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# Lowercase the word. |
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$word = lc( $word ); |
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# Normalize the word, i.e. convert accented characters to their normalized |
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# representation. |
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$word = NFD( $word ); |
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# Create an array of the word's characters. |
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my @chars = split( //, $word ); |
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# The basic rule is that the number of syllables in a word equals the |
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# number of vowels. |
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my $syllables = 0; |
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foreach my $vowel ( @VOWELS ) { |
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foreach my $char ( @chars ) { |
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if ( $vowel eq $char ) { |
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$syllables++; |
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} |
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} |
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} |
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# Certain vowel combinations doesn't classify as "syllable separator". |
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foreach ( qw(ai au ay ei eu ey oi ou oy øi øu øy æi æu æy åi åu åy) ) { |
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my $occurences = $word =~ m/$_/g; |
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$syllables -= $occurences; |
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} |
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# Return |
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return $syllables; |
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} |
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1; |
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=head1 ACCENTED CHARACTERS |
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Accented characters, like é, à etc., are normalized (see L) |
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before the number of syllables are calculated. |
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=head1 SEE ALSO |
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=over 4 |
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=item * L |
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=back |
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=head1 AUTHOR |
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Tore Aursand, C<< >> |
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=head1 BUGS |
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Please report any bugs or feature requests to the web interface at L |
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=head1 SUPPORT |
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You can find documentation for this module with the perldoc command. |
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perldoc Lingua::NO::Syllable |
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You can also look for information at: |
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=over 4 |
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=item * AnnoCPAN: Annotated CPAN documentation |
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L |
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=item * CPAN Ratings |
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L |
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=item * Search CPAN |
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L |
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=back |
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=head1 LICENSE AND COPYRIGHT |
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Copyright 2015 Tore Aursand. |
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This program is free software; you can redistribute it and/or modify it |
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under the terms of the the Artistic License (2.0). You may obtain a |
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copy of the full license at: |
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L |
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Any use, modification, and distribution of the Standard or Modified |
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Versions is governed by this Artistic License. By using, modifying or |
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distributing the Package, you accept this license. Do not use, modify, |
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or distribute the Package, if you do not accept this license. |
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If your Modified Version has been derived from a Modified Version made |
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by someone other than you, you are nevertheless required to ensure that |
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your Modified Version complies with the requirements of this license. |
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This license does not grant you the right to use any trademark, service |
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mark, tradename, or logo of the Copyright Holder. |
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This license includes the non-exclusive, worldwide, free-of-charge |
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patent license to make, have made, use, offer to sell, sell, import and |
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otherwise transfer the Package with respect to any patent claims |
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licensable by the Copyright Holder that are necessarily infringed by the |
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Package. If you institute patent litigation (including a cross-claim or |
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counterclaim) against any party alleging that the Package constitutes |
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direct or contributory patent infringement, then this Artistic License |
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to you shall terminate on the date that such litigation is filed. |
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Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER |
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AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. |
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THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR |
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PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY |
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YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR |
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CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR |
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CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE, |
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |