将结构字段转换为字符串

Question

我正在尝试将结构字段“Category”转换为字符串，以便我可以在ConcatatenateNotification中进行串联。有人知道如何做吗？请参阅下面的代码片段。//Category is enum of//available notification types (semantic meaning of the notification)type Category string// Category allowed valuesconst (    FlowFailure  Category = "flow_failure"    WriterResult Category = "writer_result")//Notification is struct containing all information about notificationtype Notification struct {    UserID     int    Category   Category}//ConcatenateNotification loads data from Notification struct and concatenates them into one string, "\n" delimitedfunc ConcatenateNotification(n Notification) (msg string) {    values := []string{}    values = append(values, "UserID: " + strconv.Itoa(n.UserID))    values = append(values, "Category: " + (n.Category)) // Anybody knows how to convert this value to string?    msg = strings.Join(values, "\n")    return msg

Answer 1

由于 已经是底层，您可以简单地：Categorystring

values = append(values, "Category: " + string(n.Category))

Answer 2

首先，你不需要strconv。Itoa 要将 int 与字符串连接起来，您可以简单地使用 .如有必要，您可以使用其他动词代替（此处更多）。您可以对 . 是一种更习惯用的方式来连接go中的字符串。fmt.Sprintf("UserID:%v", n.UserID)%vCategoryfmt.Sprintf

因此，代码将如下所示：

//ConcatenateNotification loads data from Notification struct

// and concatenates them into one string, "\n" delimited

func ConcatenateNotification(n Notification) (msg string) {

    values := []string{}

    values = append(values, fmt.Sprintf("UserID: %v", n.UserID))

    values = append(values, fmt.Sprintf("Category: %v", n.Category))

    msg = strings.Join(values, "\n")

    return msg

}

如果你想缩短代码，你也可以做这样的事情：

func ConcatenateNotification(n Notification) (msg string) {

    return fmt.Sprintf("UserID: %v\nCategory:%v", n.UserID, n.Category)

}