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You may wish to wrap your code in <code> tags next time. I'm not 100% sure what you're asking, but perhaps this code example will answer your question:
sub function { my $hashref = shift; $hashref->{three} = 3; } my %hash = ( one => 1, two => 2 ); &function(\%hash); print join(", ", keys %hash); # one, two, three
You can also have the same behavior like this:
sub function (%) { my %hashref = shift; ... } &function(%hash); # passes %hash as a ref
Then there's this:
sub function { my %hash = %{shift}; # de-references $hash{three} = 3; # Does not affect the real %hash! }

In reply to Re: how do I use a hash of hashes reference to a function ? by Fastolfe
in thread how do I use a hash of hashes reference to a function ? by Anonymous Monk

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
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