The problem is that in populating %hash you string the tied hash out into a list and then copy that data into the new hash. But now you have a hash %hash which isn't tied.

The solution is to return the reference to the hash to a scalar like $h_ref and then do your lookups with: 

foreach (keys %$h_ref) {
  print "$h_ref->{$_}\n";
}

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In reply to Re (tilly) 1: Reference to hash tied with Tie::IxHash doesn't remember insertion order by tilly
in thread Reference to hash tied with Tie::IxHash doesn't remember insertion order by Anonymous Monk

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