Scala Language Matching on an Option


Example

If you are matching on an Option type:

def f(x: Option[Int]) = x match {
    case Some(i) => doSomething(i)
    case None    => doSomethingIfNone
}

This is functionally equivalent to using fold, or map/getOrElse:

def g(x: Option[Int]) = x.fold(doSomethingIfNone)(doSomething)
def h(x: Option[Int]) = x.map(doSomething).getOrElse(doSomethingIfNone)