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1 | package MooseX::AttributeHelpers::MethodProvider::List; |
2 | use Moose::Role; |
3 | |
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4 | our $VERSION = '0.01'; |
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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, $writer) = @_; |
16 | return sub { |
17 | scalar @{$reader->($_[0])} ? 1 : 0 |
18 | }; |
19 | } |
20 | |
21 | sub find : method { |
22 | my ($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, $writer) = @_; |
50 | return sub { |
51 | my ($instance, $f) = @_; |
52 | @{$reader->($instance)} |
53 | }; |
54 | } |
55 | |
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56 | 1; |
57 | |
58 | __END__ |
59 | |
60 | =pod |
61 | |
62 | =head1 NAME |
63 | |
64 | MooseX::AttributeHelpers::MethodProvider::List |
65 | |
66 | =head1 DESCRIPTION |
67 | |
68 | This is a role which provides the method generators for |
69 | L<MooseX::AttributeHelpers::Collection::List>. |
70 | |
71 | =head1 METHODS |
72 | |
73 | =over 4 |
74 | |
75 | =item B<meta> |
76 | |
77 | =back |
78 | |
79 | =head1 PROVIDED METHODS |
80 | |
81 | =over 4 |
82 | |
83 | =item B<count> |
84 | |
85 | =item B<empty> |
86 | |
87 | =item B<find> |
88 | |
89 | =item B<grep> |
90 | |
91 | =item B<map> |
92 | |
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93 | =item B<elements> |
94 | |
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95 | =back |
96 | |
97 | =head1 BUGS |
98 | |
99 | All complex software has bugs lurking in it, and this module is no |
100 | exception. If you find a bug please either email me, or add the bug |
101 | to cpan-RT. |
102 | |
103 | =head1 AUTHOR |
104 | |
105 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
106 | |
107 | =head1 COPYRIGHT AND LICENSE |
108 | |
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109 | Copyright 2007-2008 by Infinity Interactive, Inc. |
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110 | |
111 | L<http://www.iinteractive.com> |
112 | |
113 | This library is free software; you can redistribute it and/or modify |
114 | it under the same terms as Perl itself. |
115 | |
116 | =cut |