Why no immutable arrays in scala standard library?

Question

Scala has all sorts sorts of immutable sequences like List, Vector,etc. I have been surprised to find no implementation of immutable indexed sequence backed by a simple arra

Answer 1

You could cast your array into a sequence.

val s: Seq[Int] = Array(1,2,3,4)

The array will be implicitly converted to a WrappedArray. And as the type is Seq, update operations will no longer be available.