aoc2024/day-02/internal/one/check.go

package one

import "math"

func check(nums []int, cmp comparator) bool {
	for i := 1; i < len(nums); i++ {
		if cmp(nums, i) || !isSafe(nums[i-1], nums[i]) {
			return false
		}
	}
	return true
}

func isSafe(m, n int) bool {
	return int(math.Abs(float64(m-n))) <= 3
}