Andre Queen Andre Queen - 22 days ago 17
Scala Question

Scala Type Mismatch Mapping

I am trying to create a search function, so the user can search through a list using the key value, however the method Im trying to use returns a type mismatch, Have taken out needless code and shown what is required. How do I set points to take an Int and not "Any"?

"type Any does not conform to type Int"

val mapdata = readFile("data.txt")


def handleTwo(): Boolean = {
mnuShowPointsForTeam(currentPointsForTeam)
true
}




def mnuShowPointsForTeam(f: (String) => (String, Int)) = {
print("Team>")
val data = f(readLine)
println(s"${data._1}: ${data._2}")
}



def currentPointsForTeam(team: String): (String, Int) = {
val points = mapdata.get(team) match{
case Some(p) => p
case None => 0
}
(team, points)
}


The data.txt

SK1, 9, 7, 2, 0, 7, 3, 7, 9, 1, 2, 8, 1, 9, 6, 5, 3, 2, 2, 7, 2, 8, 5, 4, 5, 1, 6, 5, 2, 4, 1
SK2, 0, 7, 6, 3, 3, 3, 1, 6, 9, 2, 9, 7, 8, 7, 3, 6, 3, 5, 5, 2, 9, 7, 3, 4, 6, 3, 4, 3, 4, 1
SK4, 2, 9, 5, 7, 0, 8, 6, 6, 7, 9, 0, 1, 3, 1, 6, 0, 0, 1, 3, 8, 5, 4, 0, 9, 7, 1, 4, 5, 2, 8
SK5, 2, 6, 8, 0, 3, 5, 5, 2, 5, 9, 4, 5, 3, 5, 7, 8, 8, 2, 5, 9, 3, 8, 6, 7, 8, 7, 4, 1, 2, 3
SK6, 2, 7, 5, 9, 1, 9, 8, 4, 1, 7, 3, 7, 0, 8, 4, 5, 9, 2, 4, 4, 8, 7, 9, 2, 2, 7, 9, 1, 6, 9
SK7, 6, 9, 5, 0, 0, 0, 0, 5, 8, 3, 8, 7, 1, 9, 6, 1, 5, 3, 4, 7, 9, 5, 5, 9, 1, 4, 4, 0, 2, 0
SK8, 2, 8, 8, 3, 1, 1, 0, 8, 5, 9, 0, 3, 1, 6, 8, 7, 9, 6, 7, 7, 0, 9, 5, 2, 5, 0, 2, 1, 8, 6
SK9, 7, 1, 8, 8, 4, 4, 2, 2, 7, 4, 0, 6, 9, 5, 5, 4, 9, 1, 8, 6, 3, 4, 8, 2, 7, 9, 7, 2, 6, 6

Answer

It looks like you want to return a tuple with a List[Int], not just a single Int.

If so

def currentPointsForTeam(team: String): (String, List[Int]) = 
  (team, mapdata.get(team).getOrElse(List.empty))
    // Or maybe List(0) instead of List.empty

If you do want to return a single Int, you have to say how to go from the List[Int] in the map to a single value. Maybe a sum?

def currentPointsForTeam(team: String): (String, Int) = 
  (team, mapdata.get(team).map(_.sum).getOrElse(0))
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