1MooseX::AttributeHelperUss:e:rMeCMtoohnootsdrePiXrb:ou:vtAietddterrPi:eb:ruLltiesDHtoe(cl3uppmemer)nst:a:tMieotnhodProvider::List(3pm)
2
3
4

NAME

6       MooseX::AttributeHelpers::MethodProvider::List
7

VERSION

9       version 0.25
10

SYNOPSIS

12          package Stuff;
13          use Moose;
14          use MooseX::AttributeHelpers;
15
16          has 'options' => (
17              metaclass  => 'Collection::List',
18              is         => 'rw',
19              isa        => 'ArrayRef[Str]',
20              default    => sub { [] },
21              auto_deref => 1,
22              provides   => {
23                  elements => 'all_options',
24                  map      => 'map_options',
25                  grep     => 'filter_options',
26                  find     => 'find_option',
27                  first    => 'first_option',
28                  last     => 'last_option',
29                  get      => 'get_option',
30                  join     => 'join_options',
31                  count    => 'count_options',
32                  empty    => 'do_i_have_options',
33                  sort     => 'sorted_options',
34              }
35          );
36
37          no Moose;
38          1;
39

DESCRIPTION

41       This is a role which provides the method generators for
42       MooseX::AttributeHelpers::Collection::List.
43

METHODS

45       meta
46

PROVIDED METHODS

48       count
49           Returns the number of elements in the list.
50
51              $stuff = Stuff->new;
52              $stuff->options(["foo", "bar", "baz", "boo"]);
53
54              my $count = $stuff->count_options;
55              print "$count\n"; # prints 4
56
57       empty
58           If the list is populated, returns true. Otherwise, returns false.
59
60              $stuff->do_i_have_options ? print "Good boy.\n" : die "No options!\n" ;
61
62       find
63           This method accepts a subroutine reference as its argument. That
64           sub will receive each element of the list in turn. If it returns
65           true for an element, that element will be returned by the "find"
66           method.
67
68              my $found = $stuff->find_option( sub { $_[0] =~ /^b/ } );
69              print "$found\n"; # prints "bar"
70
71       grep
72           This method accepts a subroutine reference as its argument. This
73           method returns every element for which that subroutine reference
74           returns a true value.
75
76              my @found = $stuff->filter_options( sub { $_[0] =~ /^b/ } );
77              print "@found\n"; # prints "bar baz boo"
78
79       map This method accepts a subroutine reference as its argument. The
80           subroutine will be executed for each element of the list. It is
81           expected to return a modified version of that element. The return
82           value of the method is a list of the modified options.
83
84              my @mod_options = $stuff->map_options( sub { $_[0] . "-tag" } );
85              print "@mod_options\n"; # prints "foo-tag bar-tag baz-tag boo-tag"
86
87       sort
88           Sorts and returns the elements of the list.
89
90           You can provide an optional subroutine reference to sort with (as
91           you can with the core "sort" function). However, instead of using
92           $a and $b, you will need to use $_[0] and $_[1] instead.
93
94              # ascending ASCIIbetical
95              my @sorted = $stuff->sort_options();
96
97              # Descending alphabetical order
98              my @sorted_options = $stuff->sort_options( sub { lc $_[1] cmp lc $_[0] } );
99              print "@sorted_options\n"; # prints "foo boo baz bar"
100
101       elements
102           Returns all of the elements of the list
103
104              my @option = $stuff->all_options;
105              print "@options\n"; # prints "foo bar baz boo"
106
107       join
108           Joins every element of the list using the separator given as
109           argument.
110
111              my $joined = $stuff->join_options( ':' );
112              print "$joined\n"; # prints "foo:bar:baz:boo"
113
114       get Returns an element of the list by its index.
115
116              my $option = $stuff->get_option(1);
117              print "$option\n"; # prints "bar"
118
119       first
120           Returns the first element of the list.
121
122              my $first = $stuff->first_option;
123              print "$first\n"; # prints "foo"
124
125       last
126           Returns the last element of the list.
127
128              my $last = $stuff->last_option;
129              print "$last\n"; # prints "boo"
130

SUPPORT

132       Bugs may be submitted through the RT bug tracker
133       <https://rt.cpan.org/Public/Dist/Display.html?Name=MooseX-
134       AttributeHelpers> (or bug-MooseX-AttributeHelpers@rt.cpan.org
135       <mailto:bug-MooseX-AttributeHelpers@rt.cpan.org>).
136
137       There is also a mailing list available for users of this distribution,
138       at <http://lists.perl.org/list/moose.html>.
139
140       There is also an irc channel available for users of this distribution,
141       at "#moose" on "irc.perl.org" <irc://irc.perl.org/#moose>.
142

AUTHOR

144       Stevan Little <stevan@iinteractive.com>
145

147       This software is copyright (c) 2007 by Stevan Little and Infinity
148       Interactive, Inc.
149
150       This is free software; you can redistribute it and/or modify it under
151       the same terms as the Perl 5 programming language system itself.
152
153
154
155perl v5.38.0               MooseX:2:0A2t3t-r0i7b-u2t0eHelpers::MethodProvider::List(3pm)
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