gistfile1.scala

  val (electronicItemsGrade, manualItemsGrade) = gradesFromTake(activityTake)
  
  def aggregateGrades(grades: Iterable[Grade]):Grade = {
    val (scaledScore, possibleScore) = grades.foldLeft(0d,0d)((a,b) => {
      (a._1 + b.getScaledScore, a._2 + b.getPossibleScore)
    })
    new Grade(scaledScore, possibleScore, 0d, false)
  }

  def gradesFromTake(take:ActivityTake) : (Grade, Grade) = {
    val electronicGrades = take.getActivity.getChildren.filter(!_.isScoreRequired).map(take.getAggregate.aggregateFor(_).getFinalGrade)
    val manualGrades = take.getActivity.getChildren.filter(_.isScoreRequired).map(take.getAggregate.aggregateFor(_).getFinalGrade)

    (aggregateGrades(electronicGrades), aggregateGrades(manualGrades))
  }