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1 | package MooseX::AttributeHelpers::MethodProvider::List; |
2 | use Moose::Role; |
3 | |
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4 | our $VERSION = '0.12'; |
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5 | our $AUTHORITY = 'cpan:STEVAN'; |
6 | |
7 | sub count : method { |
8 | my ($attr, $reader, $writer) = @_; |
9 | return sub { |
10 | scalar @{$reader->($_[0])} |
11 | }; |
12 | } |
13 | |
14 | sub empty : method { |
15 | my ($attr, $reader, $writer) = @_; |
16 | return sub { |
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17 | scalar @{$reader->($_[0])} ? 1 : 0 |
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18 | }; |
19 | } |
20 | |
21 | sub find : method { |
22 | my ($attr, $reader, $writer) = @_; |
23 | return sub { |
24 | my ($instance, $predicate) = @_; |
25 | foreach my $val (@{$reader->($instance)}) { |
26 | return $val if $predicate->($val); |
27 | } |
28 | return; |
29 | }; |
30 | } |
31 | |
32 | sub map : method { |
33 | my ($attr, $reader, $writer) = @_; |
34 | return sub { |
35 | my ($instance, $f) = @_; |
36 | CORE::map { $f->($_) } @{$reader->($instance)} |
37 | }; |
38 | } |
39 | |
40 | sub grep : method { |
41 | my ($attr, $reader, $writer) = @_; |
42 | return sub { |
43 | my ($instance, $predicate) = @_; |
44 | CORE::grep { $predicate->($_) } @{$reader->($instance)} |
45 | }; |
46 | } |
47 | |
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48 | sub elements : method { |
49 | my ($attr, $reader, $writer) = @_; |
50 | return sub { |
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51 | my ($instance) = @_; |
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52 | @{$reader->($instance)} |
53 | }; |
54 | } |
55 | |
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56 | sub join : method { |
57 | my ($attr, $reader, $writer) = @_; |
58 | return sub { |
59 | my ($instance, $separator) = @_; |
60 | join $separator, @{$reader->($instance)} |
61 | }; |
62 | } |
63 | |
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64 | 1; |
65 | |
66 | __END__ |
67 | |
68 | =pod |
69 | |
70 | =head1 NAME |
71 | |
72 | MooseX::AttributeHelpers::MethodProvider::List |
73 | |
74 | =head1 DESCRIPTION |
75 | |
76 | This is a role which provides the method generators for |
77 | L<MooseX::AttributeHelpers::Collection::List>. |
78 | |
79 | =head1 METHODS |
80 | |
81 | =over 4 |
82 | |
83 | =item B<meta> |
84 | |
85 | =back |
86 | |
87 | =head1 PROVIDED METHODS |
88 | |
89 | =over 4 |
90 | |
91 | =item B<count> |
92 | |
93 | =item B<empty> |
94 | |
95 | =item B<find> |
96 | |
97 | =item B<grep> |
98 | |
99 | =item B<map> |
100 | |
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101 | =item B<elements> |
102 | |
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103 | =item B<join> |
104 | |
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105 | =back |
106 | |
107 | =head1 BUGS |
108 | |
109 | All complex software has bugs lurking in it, and this module is no |
110 | exception. If you find a bug please either email me, or add the bug |
111 | to cpan-RT. |
112 | |
113 | =head1 AUTHOR |
114 | |
115 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
116 | |
117 | =head1 COPYRIGHT AND LICENSE |
118 | |
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119 | Copyright 2007-2008 by Infinity Interactive, Inc. |
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120 | |
121 | L<http://www.iinteractive.com> |
122 | |
123 | This library is free software; you can redistribute it and/or modify |
124 | it under the same terms as Perl itself. |
125 | |
126 | =cut |