thanks guys.
திங்., 15 ஏப்., 2019, பிற்பகல் 2:30 அன்று, roger peppe <rogpe...@gmail.com>
எழுதியது:
> Go doesn't have enum types. For any given type, even if there are
> constants of that type, that doesn't mean that those are all the valid
> values of that type. For that reason, Go doesn't provide any specific
> functionality to do what you'd like.
>
> I'd suggest creating a map that holds all the valid weekday names:
>
> var weekdays = map[string]bool{
> "Monday": true,
> "Tuesday": true,
> ... etc
> }
>
> func IsValidWeekday(s string) bool {
> return weekdays[s]
> }
>
> There might not be any particular advantage to creating a specific weekday
> type in this case.
> That might be different if you were going to use an integer representation
> (as the time package does <https://golang.org/pkg/time/#Weekday>, for
> example).
>
> Hope this helps,
> rog.
>
>
> On Mon, 15 Apr 2019 at 09:52, Sankar <sankar.curios...@gmail.com> wrote:
>
>> Hi,
>>
>> I have the following Go type.
>>
>> ```
>> type weekday string
>>
>> const (
>> Monday weekday = "Monday"
>> Tuesday = "Tuesday"
>> .
>> .
>> .
>> )
>> ```
>>
>> Now I have a function that receives a string parameter and I want to
>> evaluate if it s a valid weekday or not. Say:
>>
>> ```
>> func handler(w http.ResponseWriter, r *http.Request) {
>>
>> // Parse req.body and get a day string
>>
>> day := "Tuesday" // Valid day
>> day := "tuesday" // Invalid day
>> day := "123819283" // Invalid day
>>
>> }
>> ```
>>
>> I want to evaluate if the string variable `day` is one of the valid
>> permitted values for the [Ww]eekday custom type. What is the recommended /
>> right go way of doing this ?
>>
>> Thanks.
>>
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>
--
Sankar P
http://psankar.blogspot.com
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