数组子集golang版本

数组子集

func subsets(nums []int) [][]int{
	var res [][]int
	var dfs func(index int,list []int)
	dfs = func(index int, list []int) {
		if index >= len(nums){
			res = append(res, append([]int{},list...))
			return 
		}
		//不选index位置的元素Z
		dfs(index+1,list)
		list = append(list, nums[index])
		dfs(index+1,list)
	}
}