http://www.perlmonks.org?node_id=262776


in reply to OO Perl: Methods To Reference Hash

( ..., hshAgg => %hshAgg ) ... return $self->{hshAgg}; ... $self->{hshAgg} => %hshAgg;
You can't do that. A hash can only have strings for keys, and scalars for values. You can put REFERENCES to hashes in as the values, but then you need to access them accordingly.
hshAgg => \%hshAgg ... return %{$self->{hshAgg}}; ... $self->{hshAgg} => \%hshAgg;
Even yet, returning a whole hash isn't nice; you should return a reference to it, but then your caller has to be modified to expect a reference, too.

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