InsertAt.scala Alternative for http://aperiodic.net/phil/scala/s-99/p21.scala

InsertAt.scala

Alternative for http://aperiodic.net/phil/scala/s-99/p21.scala

def insertAt[A](e: A, n: Int, ls: List[A]) =
    ls.patch(n, List(e), 0)               
    
insertAt('new,1,li)                               //> res1: List[Symbol] = List('a, 'new, 'b, 'c, 'd)
insertAt('new,0,li)                               //> res2: List[Symbol] = List('new, 'a, 'b, 'c, 'd)
insertAt('new,99,li)                              //> res3: List[Symbol] = List('a, 'b, 'c, 'd, 'new)