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0 pointsdebug-desperado3y ago0 comments

C# interfaces with methods, properties, and events is just so nice from a readability standpoint.

I know we like to pretend that Java now has first-class functions since Java 8, but without easier to use functional signatures they're just too much of a chore. Who the heck wants to write a new interface in a separate file to do this.

I'm grateful for the JVM and think it's probably better than the CLR for targeting a high level language (as evidenced by the continued existence of Scala, Kotlin, and Groovy). But Java, even post-Loom and post-Valhalla, will never be the promised land for quick-to-read-and-grok code.

0 comments

kaba03y ago

You have Function<A,B>, Supplier<A>, and many other predefined functional interface in the standard library.

debug-desperadoOP3y ago

That's my point, we don't have much more than that. Even a 2-arg function is missing. You can supplement with something like Vavr or just write your own, but even then it's not pleasant to read "Function3<A, B, C, D>".

Typescript, Kotlin, and Scala all do this way better. Here's an example from Kotlin (it's an extension function, but focus on the combiner lambda):

  fun <T, R> Collection<T>.fold(
    initial: R,
    combine: (acc: R, nextElement: T) -> R
  ): R {
    ....
  }

kaba03y ago

Just nitpicking, but there is a BiFunction generic class in Java, but I understand your point. Yeah, some syntactic sugar could come in handy, though I don’t think that it would be a real productivity boost, more just an annoyance.

j / k navigate · click thread line to collapse

0 pointsdebug-desperado3y ago0 comments

C# interfaces with methods, properties, and events is just so nice from a readability standpoint.

0 comments

kaba03y ago

You have Function<A,B>, Supplier<A>, and many other predefined functional interface in the standard library.

debug-desperadoOP3y ago

Typescript, Kotlin, and Scala all do this way better. Here's an example from Kotlin (it's an extension function, but focus on the combiner lambda):

  fun <T, R> Collection<T>.fold(
    initial: R,
    combine: (acc: R, nextElement: T) -> R
  ): R {
    ....
  }

kaba03y ago

j / k navigate · click thread line to collapse