@peterflynn @WebsiteDeveloper There's actually a slight difference. If you don't have anything after the `,` in the query, the current option returns `regInfo[3] = undefined` whereas using `(.*)` you'd get an empty string, which in turn produces `isNan("") = false`.

Does that make sense? Would you prefer if we change the logic that validates the matches later to use here `(.*)` instead?