go语言学习--go中的map切片
//定义一个结构 type Car struct { Brand string Age int } func Pluck() map[int][]Car { carMap := make(map[int][]Car) carArr := make([]Car, 0) carArr = append(carArr, Car{ Brand: "audi", Age: 1, }) carMap[1] = carArr //如果存在键,则添追加数据 child, ok := carMap[1] if ok { child = append(child, Car{ Brand:"QQ", Age:5, }) carMap[1] = child } else {//第一次添加数据 carArr := make([]Car, 0) carArr = append(carArr, Car{ Brand: "audi", Age: 1, }) carMap[1] = carArr } return carMap } func main() { rs := Pluck() for _, item := range rs { for _, child := range item { fmt.Println(child.Brand) } } }