Hash::Util::FieldHash(3p) Perl Programmers Reference Guide

Hash::Util::FieldHash(3p) Perl Programmers Reference Guide # Hash::Util::FieldHash(3p) Perl Programmers Reference Guide NNAAMMEE # Hash::Util::FieldHash - Support for Inside-Out Classes SSYYNNOOPPSSIISS # ### Create fieldhashes use Hash::Util qw(fieldhash fieldhashes); # Create a single field hash fieldhash my %foo; # Create three at once... fieldhashes \ my(%foo, %bar, %baz); # ...or any number fieldhashes @hashrefs; ### Create an idhash and register it for garbage collection use Hash::Util::FieldHash qw(idhash register); idhash my %name; my $object = \ do { my $o }; # register the idhash for garbage collection with $object register($object, \ %name); # the following entry will be deleted when $object goes out of scope $name{$object} = 'John Doe'; ### Register an ordinary hash for garbage collection use Hash::Util::FieldHash qw(id register); my %name; my $object = \ do { my $o }; # register the hash %name for garbage collection of $object's id register $object, \ %name; # the following entry will be deleted when $object goes out of scope $name{id $object} = 'John Doe'; FFUUNNCCTTIIOONNSS # "Hash::Util::FieldHash" offers a number of functions in support of "The Inside-out Technique" of class construction. ...