go - 如何在Golang中按值获取枚举变量名称？

Question

我使用enum定义id和文本值之间的关系，但是我使用id作为枚举值，因为我不能使用id作为变量名

type Gender uint8
type MemberType uint8

const (
    Male Gender = 2
    Female Gender = 5

    Standard MemberType = 2
    VIP MemberType = 5
)

现在，我从“性别”表和“成员(member)类型”表中选择了ID 5，如何使用它来获取“性别”的文本“女性”和“成员(member)类型”的文本“VIP”？

Answer 1

如果您要获取字符串“Female”和“VIP”

var genders = map[uint8]string{
    2: "Male",
    5: "Female",
}

var memberTypes = map[uint8]string{
    2: "Standard",
    5: "VIP",
}

或者:

var genders = map[Gender]string{
    Male: "Male",
    Female: "Female",
}

var memberTypes = map[MemberType]string{
    Standard: "Standard",
    VIP: "VIP",
}

然后你会得到类似

 id := 5
 fmt.Println(genders[id]) // "Female"
 fmt.Println(memberTypes[id]) // "VIP"
 // or...
 fmt.Println(genders[Gender(id)]) // "Female"
 fmt.Println(memberTypes[MemberType(id)]) // "VIP"