Data::Perl::Role::Collection::Hash - Wrapping class for Perl's built in hash structure.
version 0.002004
use Data::Perl qw/hash/; my $hash = hash(a => 1, b => 2); $hash->values; # (1, 2) $hash->set('foo', 'bar'); # (a => 1, b => 2, foo => 'bar')
This class provides a wrapper and methods for interacting with a hash. All methods that return a list do so via a Data::Perl::Collection::Array object.
Given an optional list of keys/values, constructs a new Data::Perl::Collection::Hash object initalized with keys/values and returns it.
Returns a list of values in the hash for the given keys.
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.
Returns a list of values in the hash for the deleted keys.
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.
Returns the list of values in the hash.
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"; }
Returns the key/value pairs in the hash as a flattened list..
Resets the hash to an empty value, like %hash = ().
%hash = ()
Returns the number of elements in the hash. Also useful for not empty: has_options => 'count'.
has_options => 'count'
If the hash is populated, returns false. Otherwise, returns true.
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.
The name of the class which returned lists are instances of; i.e. Data::Perl::Collection::Array.
Data::Perl::Collection::Array
Subclasses of this class can override this method.
Note that each is deliberately omitted, due to its stateful interaction with the hash iterator. keys or kv are much safer.
each
keys
kv
Data::Perl
MooX::HandlesVia
Matthew Phillips <mattp@cpan.org>
This software is copyright (c) 2013 by Matthew Phillips <mattp@cpan.org>.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
To install Data::Perl, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Data::Perl
CPAN shell
perl -MCPAN -e shell install Data::Perl
For more information on module installation, please visit the detailed CPAN module installation guide.