I'm trying to get all of the keys in a referenced hash of a hash. Here's my code: 
foreach my $pid (keys %$matches) { 
        foreach my $key (keys $$matches{$pid}) {
               print "$pid:$key:$$matches{$pid}{$key}\n";
        }
}

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The error code tells me that it's not a hash. What is the correct syntax?

thanks as always,

melguin

In reply to keys of hash of reference to hash by melguin

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