Question: Consider the following Scala case class and function definitions: trait Result + +Y] case class Error [+Y] (s:Y) extends Result [Nothing, Y] case class Ok

Consider the following Scala case class and function definitions: trait Result

+ +Y] case class Error [+Y] (s:Y) extends Result [Nothing, Y] case

Consider the following Scala case class and function definitions: trait Result + +Y] case class Error [+Y] (s:Y) extends Result [Nothing, Y] case class Ok [+X] (n:x) extends Result[X,Nothing] def comb ine [ U, X,T] (us : List [ U], f:U=>Result [X,Y]) : Result [ List [X], List[T]] = us match t case Ni Ok (Nil) case v: :vs => f (v), comb ine vs, f)) match case (Error is), Error (sS) Error (s:ss) case (Ok case (Error (S)Okns) > Error List (S)) case (Ok Error (ss)) Error (ss) (n) Ok (ns )) -> Ok (n: :ns)

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