golang slice N選3 組合

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package mainimport("fmt")func main(){var a = []int32{1,2,3,4,5, 6}fmt.Println(mix(0,1,2, a, nil))}func mix(i, j, k int, a []int32, result [][]int32) [][]int32 {length := len(a)if k <= length-1 {result = append(result, []int32{a[i], a[j], a[k]})k++result = mix(i, j, k, a, result)} else {if j <= length - 2 {j++k = j + 1result = mix(i, j, k, a, result)} else {if i <= length - 3 {i++j = i + 1k = j + 1result = mix(i, j, k, a, result)}}}return result}