Question

Im learning Scala now, im trying to pass a tuple to a function that prints all elements with for loop. This is what ive done so far but obviously something went wrong.

object Tuple_demo {
    def main(args: Array[String])
    {
      var tup1=(10,"test",6.8)
      printMe(tup1)
    }
    def printMe(tup1:Tuple1)
    {
      for (ob<-tup1)
      {
        println(ob)
      }
    }
}

Answer 1

All Scala Tuples extend Product. You can use its productIterator to iterate over tuple items:

scala> (10,"test",6.8).productIterator.foreach(println)
10
test
6.8

---

The type declaration of your printMe function is incorrect. It should be a 3-ary tuple with types of its items specified, i.e. tup1: Tuple3[Int, String, Double]. Also, Scala has a sugar for tuple type declarations, so the following would also be correct: tup1: (Int, String, Double).