golang slice N选3 组合

package main

import(
	"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 + 1
			result = mix(i, j, k, a, result)
			
		} else {
			if i <= length - 3 {
				i++
				j = i + 1
				k = j + 1
				result = mix(i, j, k, a, result)
			}
		}
	}
	return result
}

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