Scala, Ocaml, SML, Haskell, Swift, C# (the Nullable type) and many other languages have Optionals/Maybes/Nullable types (all names for the same thing). I agree

Scala, Ocaml, SML, Haskell, Swift, C# (the Nullable type) and many other languages have Optionals/Maybes/Nullable types (all names for the same thing). I agree Optional's should booster safety (in the iOS/OS X world) if Swift can convince everyone to start using them.