${$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 {...}}};