[lkitching]

It's implicit arguments, not implicit conversions that enable type classes in Scala, although the class is usually represented by a trait e.g.

    trait Show[T] { def show(v : T): String }
    implicit object ShowInt extends Show[Int] {
	def show(i: Int) = i.toString
    }
    def showLine[T](v : T)(implicit show: Show[T]): Unit = {
        println(show.show(v))
    }

[daxfohl]

Nice, that makes it more clear. Thanks!