Question

How to shift elements of an array to the left by one position in Kotlin

Answer 1

fun shiftLeft(arr: IntArray): IntArray {
    if (arr.isEmpty()) return arr
    val result = IntArray(arr.size)
    
    for (i in 1 until arr.size) {
        result[i - 1] = arr[i]
    }
    
    result[arr.lastIndex] = arr[0]
    
    return result
}

fun main() {
    val arr = intArrayOf(0, 1, 2, 3, 4, 5)
    println("Original: ${arr.joinToString()}")
    
    val shifted = shiftLeft(arr)
    println("Shifted:  ${shifted.joinToString()}")
}

 
  
/*
run:
  
Original: 0, 1, 2, 3, 4, 5
Shifted:  1, 2, 3, 4, 5, 0

*/

 

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