Question

How to zero a 2D array in Kotlin

Answer 1

fun main() {
    val arr = arrayOf(
        intArrayOf(1, 2, 33,  5),
        intArrayOf(4, 5,  6, 28)
    )
 
    val rows = arr.size
    val cols = arr[0].size

    printArray(arr, rows, cols)
    
    arr.forEach { it.fill(0) }
    
    printArray(arr, rows, cols)
}

fun printArray(arr: Array<IntArray>, rows: Int, cols: Int) {
    for (i in 0 until rows) {
        for (j in 0 until cols) {
            print("${arr[i][j]} ")
        }
        println()
    }
}


 
/*
run:

1 2 33 5 
4 5 6 28 
0 0 0 0 
0 0 0 0
 
*/

 

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