gistfile1.java

object b {  
  trait Ops[T] {
    def +(y: T): T
    def ^(y: Int): T
  }
  
  implicit def intops(x: Int) = new Ops[Int] { 
    def +(y: Int) = x + y
    def ^(y: Int) = Math.pow(x, y).toInt
  }
  
  implicit def floatops(x: Float) = new Ops[Float] {
    def +(y: Float) = x + y
    def ^(y: Int) = Math.pow(x, y).toFloat
  }
  
  def go[T <% Ops[T]](xs: Array[T]) = xs.map(_ ^ 2).reduceLeft(_ + _)
}    

// scala> import b._
// import b._
// 
// scala> go(Array(1,2,3))
// res0: Int = 14
// 
// scala> go(Array(1f, 2.5f, 3.6f))
// res1: Float = 20.21