Mastermind resolver in Scala

gistfile1.scala

package mastermind

import collection.Seq

object MasterMindKata extends App {


  def getPlusV1(z: Seq[(Char, Char)]): String = {
    val res = for (t <- z) yield {
      if (t._1 == t._2) {
        "+"
      } else ""
    }
    res.mkString("")
  }

  def resolveMasterMind(secret: String, guess: String): String = {

    //consider using corresponds instead
    val z: Seq[(Char, Char)] = secret.zip(guess)

    val y: (Seq[(Char, Char)], Seq[(Char, Char)]) = z.partition(c => c._1 == c._2)

    val matched = y._1

    val unmatched = y._2.unzip

    val matchedSomewhere = unmatched._1.intersect(unmatched._2)

    "+" * matched.size + "-" * matchedSomewhere.size

  }


  val case1: String = resolveMasterMind("rrrrrr", "bbbbbb")
  println(case1 == ""  , " >" + case1 + "<")
  val case2: String = resolveMasterMind("rrrrrb", "bbbbbb")
  println(case2 == "+"  , " >" + case2+ "<")
  val case3: String = resolveMasterMind("rrrrbb", "bbbbbb")
  println(case3 == "++"  , " >" + case3 + "<")
  val case4: String = resolveMasterMind("grrrbb", "bgbbbb")
  println(case4 == "++-"  , " >" + case4 + "<")
  val case5: String = resolveMasterMind("rgbyrgby", "yrgbyrgb")
  println(case5 == "--------"  , " >" + case5 + "<")


}