// List
val l = List(1, 2, 3)
val head :: tail = l
val a :: b :: _ = l
val List(a, b, _*) = l
val List(a, _, c, _*) = l

// Vectors
val v = Vector(1, 2, 3)
val a +: b = v
val e +: f +: _ = v
val Vector(c, d, _) = v

// Array
val a = Array(1, 2, 3)
a(1) = 9
a.update(2, 11)