Scala Array

Array in Scala

An array is also handled in Scala as an object:

val myFirstArrayObject = new Array[Int](2)

myFirstArrayObject(0) = 1

myFirstArrayObject(1) = 2

The above variable denotes an Array of Integer of Size 2. In place of using a[0] like in another programming language, we have used syntax like a(0). This is syntactic sugar to let us call an object just as if it was a function. Under the hood, the compiler is calling a default method called apply(), taking a single input (an Int in our case) to make it possible.

An array is a mutable object. It is declared as a val in this example, but still, we can change the value of indexes 0 and 1. val just enforces not to mutate the reference, not the corresponding object.