How to check if Two Lists have Same Elements (Regardless of Order) in Kotlin - Step by Step Examples

How to check if Two Lists have Same Elements (Regardless of Order) in Kotlin ?

Answer

To check if two lists have the same elements regardless of order in Kotlin, you can sort both lists and then compare them.


✐ Examples

1 Check Equality of Unordered Lists - Same Elements

In this example,

  1. We create two lists: list1 and list2 with the same set of elements.
  2. We sort both lists using the sorted function.
  3. We use the equals method to check if the sorted list1 equals the sorted list2.
  4. Finally, we print the result to standard output.

Kotlin Program

fun main() {
    val list1 = listOf(1, 2, 3)
    val list2 = listOf(3, 2, 1)
    val result = list1.sorted() == list2.sorted()
    println("Do the lists have the same elements? $result")
}

Output

Do the lists have the same elements? true

2 Check Equality of Unordered Lists - Different Elements

In this example,

  1. We create two lists: list1 and list2 with different sets of elements.
  2. We sort both lists using the sorted function.
  3. We use the equals method to check if the sorted list1 equals the sorted list2.
  4. Finally, we print the result to standard output.

Kotlin Program

fun main() {
    val list1 = listOf(1, 2, 3)
    val list2 = listOf(4, 5, 6)
    val result = list1.sorted() == list2.sorted()
    println("Do the lists have the same elements? $result")
}

Output

Do the lists have the same elements? false

Summary

In this tutorial, we learned How to check if Two Lists have Same Elements (Regardless of Order) in Kotlin language with well detailed examples.


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