[tpm] dereferencing anonymous hashes

[adam.prime at utoronto.ca]

Quoting Fulko Hew <fulko.hew at gmail.com>:

>
> The question should have been... whats the difference between:
>
> %x = ();  and
> %x = {};
>

the first one is a normal assignment to a hash, the second one, i'm  
guessing is an assignment of a reference to a hash '{}' to a hash, so  
you get a hash with one key (the address of the anonymous hash) who's  
value is undef.

Basically you probably never (or rarely) want to do the second one.

Adam