W3School TIY Editor

package main import ("fmt") func main() { a := map[string]int{"one": 1, "two": 2, "three": 3, "four": 4} var b []string // 定义顺序 b = append(b, "one", "two", "three", "four") for k, v := range a { // 无序循环 fmt.Printf("%v : %v, ", k, v) } fmt.Println() for _, element := range b { // 按定义顺序循环 fmt.Printf("%v : %v, ", element, a[element]) } }