Monotonicity count

Mono.scala

import scala.annotation.tailrec
/**
 * User: gabriel
 * Date: 7/17/13
 */
object Mono {
  def  findMonotonicityBreaks(items:Seq[Int]):Int={
    @tailrec
    def breaksRec(itms:Seq[Int],currMono:Option[Int], count:Int):Int=itms match {
      case x::y::ys=> {
        val newMono=x.compare(y)
        val c=currMono.map(cm=>if (newMono != 0 && newMono != cm) 1 else 0).getOrElse(0)
        breaksRec(y::ys,Some(newMono),count+c )
      }
      case _ => count
    }
    breaksRec(items,None,0)
  }
}