NAME

       MooseX::AttributeHelpers::MethodProvider::List - method generator for
       MooseX::AttributeHelpers::Collection::List

SYNOPSIS

          package Stuff;
          use Moose;
          use MooseX::AttributeHelpers;

          has 'options' => (
              metaclass  => 'Collection::List',
              is         => 'rw',
              isa        => 'ArrayRef[Str]',
              default    => sub { [] },
              auto_deref => 1,
              provides   => {
                  elements => 'all_options',
                  map      => 'map_options',
                  grep     => 'filter_options',
                  find     => 'find_option',
                  first    => 'first_option',
                  last     => 'last_option',
                  get      => 'get_option',
                  join     => 'join_options',
                  count    => 'count_options',
                  empty    => 'do_i_have_options',
                  sort     => 'sorted_options',
              }
          );

          no Moose;
          1;

DESCRIPTION

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

METHODS

       meta

PROVIDED METHODS

       count
           Returns the number of elements in the list.

              $stuff = Stuff->new;
              $stuff->options(["foo", "bar", "baz", "boo"]);

              my $count = $stuff->count_options;
              print "$count\n"; # prints 4

       empty
           If the list is populated, returns true. Otherwise, returns false.

              $stuff->do_i_have_options ? print "Good boy.\n" : die "No options!\n" ;

       find
           This method accepts a subroutine reference as its argument. That sub will receive each
           element of the list in turn. If it returns true for an element, that element will be
           returned by the "find" method.

              my $found = $stuff->find_option( sub { $_[0] =~ /^b/ } );
              print "$found\n"; # prints "bar"

       grep
           This method accepts a subroutine reference as its argument. This method returns every
           element for which that subroutine reference returns a true value.

              my @found = $stuff->filter_options( sub { $_[0] =~ /^b/ } );
              print "@found\n"; # prints "bar baz boo"

       map This method accepts a subroutine reference as its argument. The subroutine will be
           executed for each element of the list. It is expected to return a modified version of
           that element. The return value of the method is a list of the modified options.

              my @mod_options = $stuff->map_options( sub { $_[0] . "-tag" } );
              print "@mod_options\n"; # prints "foo-tag bar-tag baz-tag boo-tag"

       sort
           Sorts and returns the elements of the list.

           You can provide an optional subroutine reference to sort with (as you can with the
           core "sort" function). However, instead of using $a and $b, you will need to use $_[0]
           and $_[1] instead.

              # ascending ASCIIbetical
              my @sorted = $stuff->sort_options();

              # Descending alphabetical order
              my @sorted_options = $stuff->sort_options( sub { lc $_[1] cmp lc $_[0] } );
              print "@sorted_options\n"; # prints "foo boo baz bar"

       elements
           Returns all of the elements of the list

              my @option = $stuff->all_options;
              print "@options\n"; # prints "foo bar baz boo"

       join
           Joins every element of the list using the separator given as argument.

              my $joined = $stuff->join_options( ':' );
              print "$joined\n"; # prints "foo:bar:baz:boo"

       get Returns an element of the list by its index.

              my $option = $stuff->get_option(1);
              print "$option\n"; # prints "bar"

       first
           Returns the first element of the list.

              my $first = $stuff->first_option;
              print "$first\n"; # prints "foo"

       last
           Returns the last element of the list.

              my $last = $stuff->last_option;
              print "$last\n"; # prints "boo"

BUGS

       All complex software has bugs lurking in it, and this module is no exception. If you find
       a bug please either email me, or add the bug to cpan-RT.

AUTHOR

       Stevan Little <stevan@iinteractive.com>

COPYRIGHT AND LICENSE

       Copyright 2007-2009 by Infinity Interactive, Inc.

       <http://www.iinteractive.com>

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.

perl v5.14.2                                20MooseX::AttributeHelpers::MethodProvider::List(3pm)