Kotlin List slice()
Syntax & Examples

Syntax of List.slice()

There are 2 variations for the syntax of List.slice() extension function. They are:

fun <T> List<T>.slice(indices: IntRange): List<T>

This extension function returns a list containing elements at indices in the specified indices range.

fun <T> List<T>.slice(indices: Iterable<Int>): List<T>

This extension function returns a list containing elements at specified indices.

✐ Examples

1 Example

In this example,

We create a list of characters named list containing elements 'a', 'b', 'c', 'd', 'e'.
We use the slice() function with the range 1..3 to get elements at indices 1, 2, 3.
The result, which is a list containing elements 'b', 'c', 'd', is stored in result.
We print result using println().

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf('a', 'b', 'c', 'd', 'e')
    val result = list.slice(1..3)
    println(result)
}

Output

[b, c, d]

2 Example

In this example,

We create a list of integers named list containing elements 10, 20, 30, 40, 50.
We create a list of indices named indices containing elements 1, 3, 4.
We use the slice() function with the indices list to get elements at indices 1, 3, 4.
The result, which is a list containing elements 20, 40, 50, is stored in result.
We print result using println().

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf(10, 20, 30, 40, 50)
    val indices = listOf(1, 3, 4)
    val result = list.slice(indices)
    println(result)
}

Output

[20, 40, 50]

3 Example

In this example,

We create a list of strings named list containing elements "apple", "banana", "cherry", "date", "elderberry".
We use the slice() function with the range 2 until 5 to get elements at indices 2, 3, 4.
The result, which is a list containing elements "cherry", "date", "elderberry", is stored in result.
We print result using println().

Kotlin Program

fun main(args: Array<String>) {
    val list = listOf("apple", "banana", "cherry", "date", "elderberry")
    val result = list.slice(2 until 5)
    println(result)
}

Output

[cherry, date, elderberry]

Summary

In this Kotlin tutorial, we learned about slice() extension function of List: the syntax and few working examples with output and detailed explanation for each example.