C#. Until semi-recently it was only used for value types (as reference types are supposed to be nullable by default) but these days you can enable explicit nullables, which means that you have to explicitly specify nullability even for reference types.
I like explicit nullables. It’s not much more work to type those question marks and it adds a safeguard against null showing up where it shouldn’t.
I specifically inspired insisted on it for this picture because the code on the sign uses capitalized names for something that isn’t a class, which is a very C# thing to do.
Someone can correct me if im wrong but I think nullable in C# still doesnt force you to do a null check before accessing properties or methods, however I believe it does give a type error when using a nullable type where non-nullable is expected, which is good. So it might not be 1-to-1 but it fulfills a similar purpose for sure.
Coming from a rust background I would have sure appreciated my workplace enabling the nullable feature on our main codebase from the start. I’ve run out of patience for null errors :(
That should be
private string? Gender. Explicit nullables are your friends.let gender: Option<string>;I like rust.
yeah don’t even force people into identifying their gender as empty string since it’s a social construct anyway
Which language(s) have
<type>?now? Is that a new Java thing? JS/TS thing? I’ve never seen it.Edit: formatting
Kotlin has it as well
Syntax is a little different though, the above wouldn’t complete
C#. Until semi-recently it was only used for value types (as reference types are supposed to be nullable by default) but these days you can enable explicit nullables, which means that you have to explicitly specify nullability even for reference types.
I like explicit nullables. It’s not much more work to type those question marks and it adds a safeguard against
nullshowing up where it shouldn’t.I specifically
inspiredinsisted on it for this picture because the code on the sign uses capitalized names for something that isn’t a class, which is a very C# thing to do.That sounds similar in purpose to Haskell’s ‘Maybe’ or Rust’s ‘Option’ enum, right?
I still think that the null type was a mistake that introduces unnecessary bugs. But I’m glad to see more languages are taking measures against it
Someone can correct me if im wrong but I think nullable in C# still doesnt force you to do a null check before accessing properties or methods, however I believe it does give a type error when using a nullable type where non-nullable is expected, which is good. So it might not be 1-to-1 but it fulfills a similar purpose for sure.
Coming from a rust background I would have sure appreciated my workplace enabling the nullable feature on our main codebase from the start. I’ve run out of patience for null errors :(
Thanks for the info!
I’m a novice in these matters, but it’s definitely a thing in C#.