How to split a list by another list in Scala

Question

I am new to Scala and I need a solution to my problem. Imagine I have these lists:

val list1 = List(1,2,3,4,5,6,7,8,9,10,11)
val list2 = List(6,5)
         


        

Answer 1

If what you're doing is using the second list to be the indexes on the first list:

def indexedSplit[A](myList: List[A], indx: List[Int], acc: List[List[A]]): List[List[A]] = indx match{
  case Nil => acc.filter(_ != Nil).reverse
  case x :: xs => 
    val (h, t) = myList.splitAt(x)
    indexedSplit(t, xs, h :: acc)
}

wherein you recursively walk the index list and split the list under operation at each of those points. Finally you filter out empty lists and reverse the order since you've accumulated in reverse order.