What you want to do is pass the hash reference to your sub, which expects a reference. Try:

sub myroutine {
        $hash_ref = (shift);
        $$hash_ref{foo}='bar';
}

myroutine(\%thishash);

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If you wanted to make sure you were getting a hash reference inside your sub, add a line like this:
die "Not a HASH reference" unless (ref($hash_ref) eq "HASH");

[download]

In reply to Re: passing hashes and hash reference by twerq
in thread passing hashes and hash reference by symŽ

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