【Golang】快速复习指南QuickReview（三）——map

//定义 初始化
Dictionary<int, string> dic = new Dictionary<int, string>
{
    {1,"学生"},
    {2,"老师"},
    {3,"家长"}
};

//新增
dic.Add(4, "校长");

//判断是否含key
if (dic.ContainsKey(1))
{

}

//判断是否含value
if (dic.ContainsValue("学生")) { }

//遍历字典
foreach (KeyValuePair<int, string> kv in dic)
{

}
//删除指定key的元素
dic.Remove(1);

//清空字典
dic.Clear();

testMap := make(map[int]string, 3)
testMap[1] = "学生"
testMap[2] = "老师"
testMap[3] = "家长"
fmt.Println(testMap)

map[1:学生 2:老师 3:家长]

//遍历
for k, v := range testMap {
    fmt.Println(k, v)
}

1 学生
2 老师
3 家长

func delete(m map[Key]Type, key Key)

//删除
delete(testMap, 1)

for k, v := range testMap {
    fmt.Println(k, v)
}

3 家长
2 老师

var mapValueSlice = make(map[string][]string, 3)
var sc []string
sc = append(sc, "成都", "绵阳", "宜宾")
var sx = []string{"西安", "汉中", "榆林"}
mapValueSlice["四川"] = sc
mapValueSlice["陕西"] = sx
fmt.Println(mapValueSlice)

map[四川:[成都 绵阳 宜宾] 陕西:[西安 汉中 榆林]]