Question

How to rotate list elements left N times in Kotlin

Answer 1

fun rotateLeft(arr: List<Int>, positions: Int): List<Int> {
    val k = positions % arr.size
    
    return arr.drop(k) + arr.take(k)
}

fun main() {
    val arr = listOf(1, 2, 3, 4, 5, 6, 7)

    println("Original array: $arr")

    val rotated = rotateLeft(arr, 2)

    println("Rotated array: $rotated")
}



/*
run:

Original array: [1, 2, 3, 4, 5, 6, 7]
Rotated array: [3, 4, 5, 6, 7, 1, 2]

*/

 

70+ SQL courses for beginners and professionals