2 ms·

Isn't Optional used in a lot of cases where empty means failure?

• marcosdumay 6y ago
  That's not enough. Hacking failure reporting into an existence API will make your code confusing, and will leave you no way to report multiple types of errors.
• steveklabnik 6y ago
  It might be, but that doesn’t make it semantically the correct thing. As always, it depends. But traditionally, most languages that use this strategy have both, and they aren’t interchangeable. I can see this happening more when you only have optional, though.