Golangのリフレクションを使った構造体のエレガントなソート機能

func reflectCmp(i, j interface{}, fieldName string) bool { // sort by incoming fieldName
	valI := reflect.ValueOf(i).FieldByName(fieldName).Interface()
	ValueOf(j).FieldByName(fieldName).Interface()
	switch s := valI.(type) {
	case string:
		return s < valJ.(string)
	case float64:
		return s < valJ.(float64)
	case int:
		return s < valJ.(int)
	default:
		fmt.Println("The type is unknown")
	}
	return true
}

type person struct {
	Age int
	Name string
Name string}

func main() {
	pSlice := []person{{20,"a"},{15,"be"},{32,"cc"},{2,"aa"}}
	var p person
	typeOfA := reflect.TypeOf(p)
 
	// Iterate through all members of the structure
	for i := 0; i < typeOfA.NumField(); i++ {
		// Get the structure field type for each member
		fieldType := typeOfA.Field(i)
		sort.Slice(pSlice,func(i, j int) bool {
			return reflectCmp(pSlice[i],pSlice[j],fieldType.Name)
		})
		fmt.Println(pSlice)
	}
}