两数之和

[Clear2]

func towSum(nums [4]int, target int) []int {
	m := make(map[int]int)

	for i := 0; i < len(nums); i++ {
		key := target - nums[i]

		if _, ok := m[key]; ok {
			return []int{m[key], i}
		}

		m[nums[i]] = i
	}
	return nil
}

[Clear2]

var num = [...]int {2, 7, 11, 15}
var target = 9

func main() {
	a := towSum(num, target)
	fmt.Println(a)
}