How to efficient copy an Array to another in Scala?

Question

How I can use another way to copy a Array to another Array?

My thought is to use the = operator. For example:

Answer 1

Consider Array.copy in this example where dest is a mutable Array,

val a = (1 to 5).toArray
val dest = new Array[Int](a.size)

and so

dest
Array[Int] = Array(0, 0, 0, 0, 0)

Then for

Array.copy(a, 0, dest, 0, a.size)

we have that

dest
Array[Int] = Array(1, 2, 3, 4, 5)

From Scala Array API note Scala Array.copy is equivalent to Java System.arraycopy, with support for polymorphic arrays.