If you can think of a better way to get a reference to an arbitrary lexical without eval sure. The original question was how to get things into arrays @a and @b; this gets things into the lexical arrays.

Granted they may really need a HoA to begin with, but this technique (or the equivalent $arrays{ $_ } = do { no strict 'refs'; \@{ $_ } } for a package variable) sometimes is useful.