Scala's Typeclass pattern

TypeclassPattern.scala

trait MeasureTypeClass[A]{
  def measure(a: A) : Int
}

object TypeClassExample{
  def genericMeasure[A : MeasureTypeClass](value: A): Int = {
    val measurer = implicitly[MeasureTypeClass[A]]
    measurer.measure(value)
  }
  
  implicit val stringTypeClass = new MeasureTypeClass[String]{
    def measure(string: String): Int = string.length
  }
  
  genericMeasure("four")
}