my $y = {%x};

Although this does create a reference to a new anonymous hash and copies the key/value pairs (you can modify the keys of %$y without affecting the set of keys in %x), this is still not a deep copy - the values are still references to the same nested hashes ({'lastname' => 'michael','tel'=>'222'}) as in the original data structure.

For true deep copies, see e.g. dclone from Storable or Clone.

Minor improvements to wording.

In reply to Re: deep copy of hash of hash by haukex
in thread deep copy of hash of hash by cmic

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