Thoughtless class

gistfile1.scala

case class Thoughtless[T <: String](
    val sensitivity: Double, 
    val focus: Int, 
    val memory: Memory[T] = Memory[T](Set[Mem[T]]()),
    val feelings: Feelings = Set[Emotion]()) {
  
  def focusScope(ioi: Set[T]): List[T] = ioi.toList.sortWith(_.length < _.length)
  
  def teach(ioi: T, emotion: Emotion) = Thoughtless[T](
      sensitivity, focus,
      memory add (Mem[T](ioi, emotion), sensitivity), feelings) 
    
  def reason(ioi: Set[T], extent: Int = focus): Set[Mem[T]] =
    if (extent < 1) Set[Mem[T]]()
    else {
      val focused = focusScope(ioi)
      (memory scan (focus - extent + 1, focused.head, sensitivity)) ++ reason(focused.tail.toSet, extent - 1)
    }
}