priort/PersistTheList7.kt

## PersistTheList7.kt
tailrec fun <E> dropWhile(list: List<E>, f: (E) -> Boolean): List<E> =
    when(list) {
        Empty -> Empty
        is Cons -> if (f(list.head)) dropWhile(list.tail, f) else list
    }
	tailrec fun <E> dropWhile(list: List<E>, f: (E) -> Boolean): List<E> =
	when(list) {
	Empty -> Empty
	is Cons -> if (f(list.head)) dropWhile(list.tail, f) else list
	}