Hi Monks
I have created an object that needs to store 2 hashes that point to the same referenced hash. The idea is that I want to store a "clean" and dirty "version" in the object.
The problem is, that the object uses the same pointer for both hashes, meaning that if I change the dirty hash, the clean hash is also changed. This is the code: 
sub new {
    my ($class, $hash) = @_;

    my $this  = {};
    bless($this, $class);
  
    $this->{clean} = $hash;
    $this->{dirty} = \%orig_graph;

    print Dumper $this;

    die (0);
    return $this;
}

[download]
If I print it (using the dumper) I get: 
$VAR1 = bless( {
                 'dirty' => {
                              'a' => 1,
                              'b' => 2
                            },
                 'clean' => $VAR1->{'dirty'}
               }, 'Edges' );

[download]
As you can see, clean points to dirty, so I can't change one without the other.
My question is, what can I do to store two versions like I want. I can go over all the keys in the hash and create a new hash, but I was wondering if there was something smarter, a bit like a copy constructer? Any ideas?
Thanks,
MrGuy


I can't complain, but sometimes I still do."
-- Joe Walsh

Thanks for all your help!
I used clone for a deep copy, and managed to fix my problem
Thanks again
Mrguy

In reply to Using the same hashes as different object variables by mrguy123

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