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# $Id$ |
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=head1 NAME |
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Tie::Hash::Cannabinol - Perl extension for creating hashes that forget things |
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=head1 SYNOPSIS |
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use Tie::Hash::Cannabinol; |
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my %hash; |
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tie %hash, 'Tie::Hash::Cannabinol'; |
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or |
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my %hash : Stoned; |
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# % hash can now be treated exactly like a normal hash - but don't trust |
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# anything it tells you. |
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=head1 DESCRIPTION |
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Tie::Hash::Cannabinol is a completely useless demonstration of how to use |
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Tie::StdHash to pervert the behaviour of Perl hashes. Once a hash has been |
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Cd to Tie::Hash::Cannabinol, there is a 25% chance that it will forget |
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anything that you tell it immediately and a further 25% chance that it |
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won't be able to retrieve any information you ask it for. Any information |
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that it does return will be pulled at random from its keys. |
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Oh, and the return value from C isn't to be trusted either :) |
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=cut |
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package Tie::Hash::Cannabinol; |
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use 5.006; |
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use strict; |
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use warnings; |
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use Tie::Hash; |
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use Attribute::Handlers autotie => { "__CALLER__::Stoned" => __PACKAGE__ }; |
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our $VERSION = '1.12.3'; |
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our @ISA = qw(Tie::StdHash); |
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=head2 STORE |
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Stores data in the hash 3 times out of 4. |
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=cut |
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sub STORE { |
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my ($self, $key, $val) = @_; |
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return if rand > .75; |
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$self->{$key} = $val; |
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} |
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=head2 FETCH |
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Fetchs I from the hash 3 times out of 4. |
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=cut |
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sub FETCH { |
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9072
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9072
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my ($self, $key) = @_; |
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9072
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return if rand > .75; |
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6752
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return $self->{(keys %$self)[rand keys %$self]}; |
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} |
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=head2 EXISTS |
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Gives very dodgy information about the existence of keys in the hash. |
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=cut |
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sub EXISTS { |
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6001
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return rand > .5; |
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} |
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1; |
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__END__ |