in reply to Access Hashes of Hashes etc.


DrHyde's answer is correct, if elliptical. The key concept is that hashes can only contain scalar values. That means the only way to have a hash inside a hash is to use a reference for the inner hash. And as long as you're doing that, you might as well use a reference for the outer hash itself to make the syntax more regular ($thingy->{foo}->[3] vs. $thingy{foo}->[3]).