childBuilders: List<(List<Node>) -> Node>

map

smallest

largest

fun testFun(nums: IntArray): Int {
    var smallest = nums[0]
    var largest = nums[0]

    for (i in nums.indices) {
        smallest = Math.min(smallest, nums[i])
        largest = Math.max(largest, nums[i])
    }
    return largest - smallest
}

val (max, min) = nums.fold((Int.MIN_VALUE to Int.MAX_VALUE)) { (largest, smallest), next ->
        max(largest, next) to min(smallest, next)
    }

fun testNoneFP(nums: IntArray): Boolean {
    for (i in nums.indices) {
        if (nums[i] != 1 && nums[i] != 4) {
            return false
        }
    }
    return true
}

all

fun main(args: Array<String>){
    val x: IntArray = intArrayOf(1, 4, 1, 4)
    println(testFP(x))
}

fun testFP(nums: IntArray): Boolean =
     nums.all{it !=1 && it !=4}

println(testFP(x))

false

true

println(testNoneFP(x))

fun testFP(nums: IntArray): Boolean =
     !nums.all { it !=1 && it !=4 }

.none { ... }

.all()

false

true