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

The shortest and an idiomatic way would be to use map with identity like this:

scala> val a = Array(1,2,3,4,5)
a: Array[Int] = Array(1, 2, 3, 4, 5)

Make a copy

scala> val b = a map(identity)
b: Array[Int] = Array(1, 2, 3, 4, 5)

Modify copy

scala> b(0) = 6

They seem different

scala> a == b
res8: Boolean = false

And they are different

scala> a
res9: Array[Int] = Array(1, 2, 3, 4, 5)

scala> b
res10: Array[Int] = Array(6, 2, 3, 4, 5)

This copy would work with all collection types, not just Array.