Tie::RefHash(3) Perl Programmers Reference Guide Tie::RefHash(3)NAMETie::RefHash - use references as hash keys
SYNOPSIS
require 5.004;
use Tie::RefHash;
tie HASHVARIABLE, 'Tie::RefHash', LIST;
untie HASHVARIABLE;
DESCRIPTION
This module provides the ability to use references as hash
keys if you first tie the hash variable to this module.
It is implemented using the standard perl TIEHASH
interface. Please see the tie entry in perlfunc(1) and
perltie(1) for more information.
EXAMPLE
use Tie::RefHash;
tie %h, 'Tie::RefHash';
$a = [];
$b = {};
$c = \*main;
$d = \"gunk";
$e = sub { 'foo' };
%h = ($a => 1, $b => 2, $c => 3, $d => 4, $e => 5);
$a->[0] = 'foo';
$b->{foo} = 'bar';
for (keys %h) {
print ref($_), "\n";
}
AUTHOR
Gurusamy Sarathy gsar@umich.edu
VERSION
Version 1.2 15 Dec 1996
SEE ALSOperl(1), perlfunc(1), perltie(1)16/Sep/1999 perl 5.005, patch 03 1