Scala and Spark for Big Data Analytics

Arrays

An array is a mutable collection. In arrays, the order of the elements will be preserved and duplicated elements will be kept. Being mutable, you can change the value of any element of the array by accessing it by its index number. Let's demonstrate arrays with several examples. Use the following line of code to just declare a simple array:

val numbers: Array[Int] = Array[Int](1, 2, 3, 4, 5, 1, 2, 3, 3, 4, 5) // A simple array

Now, print all the elements of the array:

println("The full array is: ")  for (i <- numbers) {    print(" " + i)  }

Now, print a particular element: for example, element 3:

println(numbers(2))

Let's sum all the elements and print the sum:

var total = 0;for (i <- 0 to (numbers.length - 1)) { total = total + numbers(i) ...