collect!

Collect.scala

case class Data(opt: Option[String], value: Int)
def d(o: String, v: Int) = Data(Some(o), v)
def n(v: Int) = Data(None, v)

val tList = List(d("a", 1), d("b", 2), n(10), d("c", 3), n(0))

tList.collect {
  case Data(Some(o), v) => v
}

tList.collect {
  case Data(Some(o), v) => (o, v)
}

repl

scala> tList.collect {
     |   case Data(Some(o), v) => v
     | }
res3: List[Int] = List(1, 2, 3)

scala> tList.collect {
     |   case Data(Some(o), v) => (o, v)
     | }
res4: List[(String, Int)] = List((a,1), (b,2), (c,3))