NAME

Moose::Meta::Attribute::Native::Trait::Hash - Helper trait for HashRef attributes

SYNOPSIS

  package Stuff;
  use Moose;

  has 'options' => (
      traits    => ['Hash'],
      is        => 'ro',
      isa       => 'HashRef[Str]',
      default   => sub { {} },
      handles   => {
          set_option     => 'set',
          get_option     => 'get',
          has_no_options => 'is_empty',
          num_options    => 'count',
          delete_option  => 'delete',
          pairs          => 'kv',
      },
  );

DESCRIPTION

This module provides a Hash attribute which provides a number of hash-like operations.

PROVIDED METHODS

These methods are implemented in Moose::Meta::Attribute::Native::MethodProvider::Hash.

get($key, $key2, $key3...)

Returns values from the hash.

In list context return a list of values in the hash for the given keys. In scalar context returns the value for the last key specified.

set($key => $value, $key2 => $value2...)

Sets the elements in the hash to the given values.

delete($key, $key2, $key3...)

Removes the elements with the given keys.

keys

Returns the list of keys in the hash.

exists($key)

Returns true if the given key is present in the hash.

defined($key)

Returns true if the value of a given key is defined.

values

Returns the list of values in the hash.

kv

Returns the key/value pairs in the hash as an array of array references.

  for my $pair ( $object->options->pairs ) {
      print "$pair->[0] = $pair->[1]\n";
  }

elements

Returns the key/value pairs in the hash as a flattened list..

clear

Resets the hash to an empty value, like %hash = ().

count

Returns the number of elements in the hash. Also useful for not empty: has_options => 'count'.

is_empty

If the hash is populated, returns false. Otherwise, returns true.

accessor

If passed one argument, returns the value of the specified key. If passed two arguments, sets the value of the specified key.

METHODS

meta

method_provider

has_method_provider

BUGS

See "BUGS" in Moose for details on reporting bugs.

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.