How to convert an array to a set in Kotlin

How to convert an array to a set in Kotlin.

Here is a detailed step-by-step tutorial on how to convert an array to a set in Kotlin.

Step 1: Create an Array

First, let's create an array in Kotlin. An array is a fixed-size collection of elements of the same type. Here's an example of creating an array of integers:

val array = arrayOf(1, 2, 3, 4, 5)

In this example, we have created an array of integers with the values 1, 2, 3, 4, and 5.

Step 2: Convert Array to Set

To convert this array to a set, we can use the toSet() function. This function is available on the Kotlin standard library and can be used to convert any iterable collection to a set.

val set = array.toSet()

In this example, we have converted the array to a set using the toSet() function and assigned the result to the set variable.

Step 3: Print the Set

Finally, let's print the set to verify that the conversion was successful. We can use the println() function to print the elements of the set.

println(set)

This will print the elements of the set in the console.

Example with a Custom Object

In addition to converting arrays of primitive types, you can also convert arrays of objects to sets. Here's an example of converting an array of custom objects to a set:

data class Person(val name: String, val age: Int)

val array = arrayOf(Person("Alice", 25), Person("Bob", 30), Person("Charlie", 35))
val set = array.toSet()

println(set)

In this example, we have created an array of Person objects and converted it to a set. The Person class is a custom data class with name and age properties.

Conclusion

In this tutorial, we have learned how to convert an array to a set in Kotlin. We used the toSet() function to perform the conversion. This can be useful when you want to remove duplicates or need the unique elements of an array.