#!/usr/bin/perl -w
use Data::Dumper;
my %hash = ('foo' => 'bar',
	     'camel' => 'beast',
	     'bug' => 'spray');
#dump the structure
open (FILE, '>/tmp/hash') or die "$!\n";
print FILE Dumper(\%hash);
close FILE;

#recreate the structure
open (FILE,'/tmp/hash') or die "$!\n";
my $data = do { local $/; <FILE> };
my %newhash = %{eval $data};