Playing around with for comprehensions to check for None in Option[T].

checking_option.scala

//Setup Option[String]s
val maybeValue1 : Option[String] = Some("Value1")
val maybeValue2 : Option[String] = Some("Value2")
val maybeValue3 : Option[String] = None

// Manually checking each value
val result = maybeValue1 match {
  case None => None
	case value1 => maybeValue2 match {
		case None => None
		case value2 => maybeValue3 match {
			case None => None
			case value3 => (value1, value2, value3)		
		}
	}
}

// Checking each value using a for comprehension
(for { _ <- maybeValue1; _ <- maybeValue2; _ <- maybeValue3 } yield ()) match {
	case None => println("Handle error here")
	case _ => println("Do stuff here")
}