/usr/share/perl5/Lingua/EN/Number/IsOrdinal.pm is in liblingua-en-number-isordinal-perl 0.05-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | package Lingua::EN::Number::IsOrdinal;
our $AUTHORITY = 'cpan:RKITOVER';
$Lingua::EN::Number::IsOrdinal::VERSION = '0.05';
use strict;
use warnings;
use Exporter 'import';
use Lingua::EN::FindNumber 'extract_numbers';
=encoding UTF-8
=head1 NAME
Lingua::EN::Number::IsOrdinal - detect if English number is ordinal or cardinal
=head1 SYNOPSIS
use Lingua::EN::Number::IsOrdinal 'is_ordinal';
ok is_ordinal('first');
ok !is_ordinal('one');
ok is_ordinal('2nd');
ok !is_ordinal('2');
=head1 DESCRIPTION
This module will tell you if a number, either in words or as digits, is a
cardinal or L<ordinal
number|http://www.ego4u.com/en/cram-up/vocabulary/numbers/ordinal>.
This is useful if you e.g. want to distinguish these types of numbers found with
L<Lingua::EN::FindNumber> and take different actions.
=cut
our @EXPORT_OK = qw/is_ordinal/;
my $ORDINAL_WORDS_NUMBER_RE = qr/(?:first|second|third|th)\s*$/;
my $NUMBER_RE = qr/^\s*(?:[+-]?)(?=\d|\.\d)\d*(?:\.\d*)?(?:[Ee](?:[+-]?\d+))?/;
my $CARDINAL_NUMBER_RE = qr/$NUMBER_RE\s*$/;
my $ORDINAL_NUMBER_RE = qr/$NUMBER_RE(?:st|nd|rd|th)\s*$/;
=head1 FUNCTIONS
=head2 is_ordinal
Takes a number as English words or digits (with or without ordinal suffix) and
returns C<1> for ordinal numbers and C<undef> for cardinal numbers.
Checks that the whole parameter is a number using L<Lingua::EN::FindNumber> or
a regex in the case of digits, and if it isn't will throw a C<not a number>
exception.
This function can be optionally imported.
=cut
sub is_ordinal { __PACKAGE__->_is_ordinal(@_) }
=head1 METHODS
=head2 _is_ordinal
Method version of L</is_ordinal>, this is where the function is actually
implemented. Can be overloaded in a subclass.
=cut
sub _is_ordinal {
my ($self, $num) = @_;
die "not a number" unless $self->_is_number($num);
if ($num =~ $ORDINAL_NUMBER_RE) {
return 1;
}
elsif ($num =~ $CARDINAL_NUMBER_RE) {
return undef;
}
elsif ($num =~ $ORDINAL_WORDS_NUMBER_RE) {
return 1;
}
return undef; # cardinal words-number
}
=head2 _is_number
Returns C<1> if the passed in string is a word-number as detected by
L<Lingua::EN::FindNumber> or is a cardinal or ordinal number made of digits and
(for ordinal numbers) a suffix. Otherwise returns C<undef>. Can be overloaded in
a subclass.
=cut
sub _is_number {
my ($self, $text) = @_;
s/^\s+//, s/\s+$// for $text;
my @nums = extract_numbers $text;
if ((@nums == 1 && $nums[0] eq $text)
|| $text =~ $ORDINAL_NUMBER_RE || $text =~ $CARDINAL_NUMBER_RE) {
return 1;
}
return undef;
}
=head1 SEE ALSO
=over 4
=item * L<Lingua::EN::FindNumber>
=item * L<Lingua::EN::Words2Nums>
=item * L<Lingua::EN::Inflect::Phrase>
=back
=head1 AUTHOR
Rafael Kitover <rkitover@cpan.org>
=head1 LICENSE
Copyright 2013-2015 by Rafael Kitover
This library is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
1;
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