How to Copy a List in Kotlin

How to Copy a List in Kotlin ?

Answer

To copy a list in Kotlin, you can use the built-in extension function `toList()` or create a new list and add all elements from the original list.

✐ Examples

1 Copy List Using toList()

In this example,

We create a list named originalList with some elements.
We use the toList() extension function on originalList to create a copy of the list.
The toList() function returns a new list with the same elements as the original list.
Finally, we print both lists to demonstrate the copy operation.

Kotlin Program

fun main() {
    val originalList = listOf(1, 2, 3, 4, 5)
    val copiedList = originalList.toList()
    println("Original List: $originalList")
    println("Copied List: $copiedList")
}

Output

Original List: [1, 2, 3, 4, 5]
Copied List: [1, 2, 3, 4, 5]

2 Copy List by Adding Elements

In this example,

We create a list named originalList with some elements.
We create an empty list named copiedList.
We use a loop to iterate over originalList and add each element to copiedList.
After the loop, copiedList contains all elements of originalList.
Finally, we print both lists to demonstrate the copy operation.

Kotlin Program

fun main() {
    val originalList = listOf("apple", "banana", "cherry")
    val copiedList = mutableListOf<String>()
    for (item in originalList) {
        copiedList.add(item)
    }
    println("Original List: $originalList")
    println("Copied List: $copiedList")
}

Output

Original List: [apple, banana, cherry]
Copied List: [apple, banana, cherry]

Summary

In this tutorial, we learned How to Copy a List in Kotlin language with well detailed examples.

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How to Copy a List in Kotlin

How to Copy a List in Kotlin ?

Answer

✐ Examples

1 Copy List Using toList()

Kotlin Program

Output

2 Copy List by Adding Elements

Kotlin Program

Output

Summary

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