NAME

MouseX::NativeTraits::HashRef - Helper trait for HashRef attributes

SYNOPSIS

  package Stuff;
  use Mouse;
  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 MouseX::NativeTraits::MethodProvider::HashRef.

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.

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.

keys

Returns the list of keys in the hash.

sorted_keys

Returns the list of sorted keys in the hash.

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_class

helper_type

SEE ALSO

MouseX::NativeTraits