Silly example implementing an Int.times helper method.

Times.scala

implicit class IntTimes(n:Int) {
  def times(f: Int => Unit) { for(i <- 1 to n) f(i) }

  // This one is optional. I'd leave it out personally.
  // def times(f: => Unit) { for(_ <- 1 to n) f }
}

// Now you can:
10 times println

// If you added the by-name version the above wouldn't
// work since it'd match that. You'd have to do this
// instead:
10 times(println(_))

// So passing about Int=>Unit functions is prettier
// if you leave off the by-name version.

Note: I used a Procedure there, and didn't specify the return value. Bad form. The Style Guide recommends (I believe) something more like this:

def times(f:Int => Unit):Unit = for(i <- 1 to n) f(i)