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0 pointskaba03y ago0 comments

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

0 comments

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 {
    ....
  }

kaba0OP3y 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.

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0 comments

debug-desperado3y 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 {
    ....
  }

kaba0OP3y ago

j / k navigate · click thread line to collapse