Moose::Meta::Attribute::Native::Trait::Hash - Helper trait for HashRef attributes
version 2.2201
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',
option_pairs => 'kv',
},
);
This trait provides native delegation methods for hash references.
Returns values from the hash.
In list context it returns a list of values in the hash for the given keys. In
scalar context it returns the value for the last key specified.
This method requires at least one argument.
Sets the elements in the hash to the given values. It returns the new values
set for each key, in the same order as the keys passed to the method.
This method requires at least two arguments, and expects an even number of
arguments.
Removes the elements with the given keys.
In list context it returns a list of values in the hash for the deleted
keys. In scalar context it returns the value for the last key specified.
Returns the list of keys in the hash.
This method does not accept any arguments.
Returns true if the given key is present in the hash.
This method requires a single argument.
Returns true if the value of a given key is defined.
This method requires a single argument.
Returns the list of values in the hash.
This method does not accept any arguments.
Returns the key/value pairs in the hash as an array of array references.
for my $pair ( $object->option_pairs ) {
print "$pair->[0] = $pair->[1]\n";
}
This method does not accept any arguments.
In list context, this returns the key/value pairs in the hash.
In scalar context, this returns the count of keys plus values. In other words,
it's the same as the keys manpage times two.
This method does not accept any arguments.
Resets the hash to an empty value, like %hash = () .
This method does not accept any arguments.
Returns the number of elements in the hash. Also useful to check for a nonempty hash, because count returns a true (nonzero) value if there is something in the hash:
has_options => 'count' .
This method does not accept any arguments.
If the hash is populated, returns false. Otherwise, returns true.
This method does not accept any arguments.
If passed one argument, returns the value of the specified key. If passed two
arguments, sets the value of the specified key.
When called as a setter, this method returns the value that was set.
This method returns a shallow clone of the hash reference. The return value
is a reference to a new hash with the same keys and values. It is shallow
because any values that were references in the original will be the same
references in the clone.
We have deliberately omitted a method for each , due to its stateful
interaction with the hash iterator. Using keys or kv is much safer.
This will return a the Class::MOP::Class manpage instance for this class.
It should also be noted that the Class::MOP manpage will actually bootstrap
this module by installing a number of attribute meta-objects into its
metaclass.
See Moose/BUGS for details on reporting bugs.
This software is copyright (c) 2006 by Infinity Interactive, Inc.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
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