2013-06-19 ScalaでListのshuffle scala.util.Randomを使う。 scala> scala.util.Random.shuffle(List(1,2,3,4,5)) res0: List[Int] = List(3, 5, 4, 2, 1)scala> scala.util.Random.shuffle(List(1,2,3,4,5)) res1: List[Int] = List(5, 4, 1, 2, 3)