1、Find the last element of a list.

Example:

scala> last(List(1, 1, 2, 3, 5, 8))
res0: Int = 8

最直接的办法

def s1(list:List[Any])={
  list.last
}
def main(args: Array[String]) {
  println(s1(List(1,2,3,4,5)))
}