${$hash_ref}{key} = ${$array_ref}[1]; #### @$hash_ref{$key1, $key2, $key3}; #### $$hash_ref{$key1}; #### @hash_ref->{$key1, $key2, $key3}; #### $hash_ref->{$key1, $key2, $key3}; #### &{do {... sub {...}}};