What are all the uses of an underscore in Scala?

The ones I can think of are Existential types def foo(l: List[Option[_]]) = ... Higher kinded type parameters case class A[K[_],T](a: K[T]) Ignored variables val _ = 5 Ignored parameters List(1, 2, 3) foreach { _ => println("Hi") } Ignored names of self types trait MySeq { _: Seq[_] => } Wildcard patterns Some(5) match { case Some(_) => println("Yes") } Wildcard patterns in interpolations "abc" ma

[agw]

網羅されていて眺めるのが楽しい。

[takc923]

scalaのアンダースコアの使い道多すぎわろた

[manaten]

scalaの_まとめ