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Java's Optionals can be `Some | None | null` right? They're just reference types still.
by desert_boi 7y ago
Java's Optionals can be `Some | None | null` right? They're just reference types still.
- chii 7y agothe intension is that the Optional reference is not null (despite it being _possible_ due to how references work in java). And it's fairly easy to add annotations like @NotNullable or some other compile time annotation which can be checked very easily by an IDE or other tool.
- erik_seaberg 7y agoThere's a very special level of hell for people who use both Optional.empty() and (Optional<?>) null for different things.
- chii 7y agoJust to play the devils' advocate, what happens if you want to represent the absence of having a value? that is, the Optional is not None (because it hasn't been computed yet).
- erik_seaberg 7y agoSpecial. Hell. (Actually that sounds like a Future<Optional<T>> or something.)
- swish_bob 7y agoIf you create a null reference to an Optional in any code base I have to deal with I will hunt you down and hurt you.
- MockObject 7y agoNo jury of peers would convict.