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object Test {
def f1(x: Any) = x.isInstanceOf[Seq[_]]
def f2(x: Any) = x match {
case _: Seq[_] => true
case _ => false
}
def f3(x: Any) = x match {
case _: Array[_] => true
case _ => false
}
def f4(x: Any) = x.isInstanceOf[Traversable[_]]
def f5(x1: Any, x2: Any, x3: AnyRef) = (x1, x2, x3) match {
case (Some(_: Seq[_]), Nil, _) => 1
case (None, List(_: List[_], _), _) => 2
case _ => 3
}
def f5: Unit = {
import scala.collection.mutable._
List(1,2,3,4,5).scanRight(0)(_+_)
}
}
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