func permute(nums []int) [][]int { var res [][]int toNext(nums,0,&res) return res } func toNext(arr []int,n int,res *[][]int) { if n==len(arr)-1 { temp:=make([]int,len(arr)) copy(temp,arr) *res=append(*res, temp) } for i:=n; i<len(arr); i++ { arr[i],arr[n]=arr[n],arr[i] toNext(arr,n+1,res) arr[i],arr[n]=arr[n],arr[i] } } 有疑问加站长微信联系（非本文作者）
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`单行代码`
func permute(nums []int) [][]int { var res [][]int toNext(nums,0,&res) return res } func toNext(arr []int,n int,res *[][]int) { if n==len(arr)-1 { temp:=make([]int,len(arr)) copy(temp,arr) *res=append(*res, temp) } for i:=n; i<len(arr); i++ { arr[i],arr[n]=arr[n],arr[i] toNext(arr,n+1,res) arr[i],arr[n]=arr[n],arr[i] } }