Api 如何比较map[string]接口{}'；s值字符串是否为空

如何比较map[string]接口{}的值字符串

使用a确定值是否为

字符串

：

for key, value := range m3 {
    if s, ok := value.(string); ok {
        fmt.Printf("%s is the string %q\n", key, s)
    } else {
        fmt.Printf("%s is not a string\n", key)
    }
}

使用“反射”确定值的基类型字符串是否：

type mystring string

m3 := map[string]interface{}{
    "something": 1,
    "brawba":    "Bawrbawr",
    "foo":       mystring("bar"),
}

for key, value := range m3 {
    if reflect.ValueOf(value).Kind() == reflect.String {
        fmt.Printf("%s is a string with type %T and value %q\n", key, value, value)
    } else {
        fmt.Printf("%s is not a string\n", key)
    }
}

---

您需要的是类型断言。请参阅。@AndySchweig请检查我更新的问题。我只想知道值是不是字符串

type mystring string

m3 := map[string]interface{}{
    "something": 1,
    "brawba":    "Bawrbawr",
    "foo":       mystring("bar"),
}

for key, value := range m3 {
    if reflect.ValueOf(value).Kind() == reflect.String {
        fmt.Printf("%s is a string with type %T and value %q\n", key, value, value)
    } else {
        fmt.Printf("%s is not a string\n", key)
    }
}