To get the unique elements of an array in Scala, you can use the distinct method. This method returns a new array that contains only the distinct elements from the original array in the order they appear.
Here is an example of using distinct to get the unique elements of an array:
val arr = Array(1, 2, 3, 2, 4, 3, 5)
val uniqueArr = arr.distinct
println(uniqueArr.mkString(", ")) // Output: 1, 2, 3, 4, 5
In this example, we created an array with duplicate elements and assigned it to the arr variable. Then, we used the distinct method to get a new array with only unique elements and assigned it to the uniqueArr variable. Finally, we printed the unique elements of the array using the mkString method. The output shows that we have successfully obtained the unique elements of the original array.
Note that the distinct method only works with arrays of primitive types and with objects that implement the hashCode and equals methods. If you need to get the unique elements of an array of custom objects, you need to implement the hashCode and equals methods for that class.