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How to find the unique elements in two arrays in Kotlin

How to find the unique elements in two arrays in Kotlin.

Here's a step-by-step tutorial on how to find the unique elements in two arrays in Kotlin.

Step 1: Create two arrays​

First, let's create two arrays that we want to find the unique elements from. For this tutorial, let's assume we have two arrays: array1 and array2.

Step 2: Combine the arrays​

To find the unique elements in two arrays, we need to combine them into a single array. We can use the plus operator to concatenate the two arrays into a new array.

val combinedArray = array1.plus(array2)

Step 3: Convert the combined array into a Set​

To find the unique elements, we can convert the combined array into a Set. A Set in Kotlin cannot contain duplicate elements, so any duplicates will automatically be removed.

val uniqueSet = combinedArray.toSet()

Step 4: Convert the Set back to an Array (optional)​

If you need the unique elements in an array format, you can convert the Set back to an Array using the toTypedArray function.

val uniqueArray = uniqueSet.toTypedArray()

Step 5: Print the unique elements​

Finally, you can print the unique elements in the array using a loop or any other method you prefer.

for (element in uniqueArray) {
    println(element)
}

Here's a complete example of the above steps:

fun main() {
    val array1 = arrayOf(1, 2, 3, 4, 5)
    val array2 = arrayOf(4, 5, 6, 7, 8)

    val combinedArray = array1.plus(array2)
    val uniqueSet = combinedArray.toSet()
    val uniqueArray = uniqueSet.toTypedArray()

    for (element in uniqueArray) {
        println(element)
    }
}

Output:

1
2
3
4
5
6
7
8

That's it! You have successfully found the unique elements in two arrays in Kotlin.