Question

I’m trying to pattern match on a Scala list with a pattern that will match if an object of the desired type is contained anywhere within the list.

I tried:

case _ :: (something: DesiredSubclass) :: _ => ???

But this only matches if there is at least one element before the one that I’m looking for.

Answer 1

Use of overt isInstanceOf[SomeType] is unsightly. Using the match-like PartialFunction literal notation is preferable:

list.exists { case _: DesiredSubclass => true; case _ => false }