On Tuesday, April 25, 2017 at 4:25:14 PM UTC-4, Tong Sun wrote:
>
>
> On Tue, Apr 25, 2017 at 3:42 PM, Egon wrote:
>
> I think the extra "enum" package would reduce readability. The code you
>> are putting into package is ~10 lines of code... so the extra package
>> doesn't reduce much typing, but it also loses enum typing... Depending on
>> the enum, you may want to have different properties as well...
>> I chose the name "ciota" because of "custom-iota", in practice you would
>> want something more descriptive such as "NewWeekday".
>
>
> So the solution is easy, don't create a general purpose package for it :D
>>
>
> OK.
>
> If going that route, and I have several enum series to define, I need to
> define a series of almost identical functions, right? Hmm..., that'd be
> really messy.
>
> Ok, I'll think of a better way on my own, which I doubt I could, :-)
>
Thought I need to use reflection, but after several round of wrestling, I
managed to do without reflection at all:
package main
import (
"fmt"
enum "github.com/suntong/enum"
)
var (
example enum.Enum
Alpha = example.Iota("Alpha")
Beta = example.Iota("Beta")
weekday enum.Enum
Sunday = weekday.Iota("Sunday")
Monday = weekday.Iota("Monday")
)
func main() {
fmt.Printf("%s\n", example.String(Alpha))
fmt.Printf("%s\n", example.String(Beta))
fmt.Println("=======")
fmt.Printf("%d\t%d\n", Alpha, Alpha+1)
fmt.Printf("%s\t%s\n", example.String(Beta-1), example.String(Alpha+1))
fmt.Println("=======")
if a, ok := example.Get("Alpha"); ok {
fmt.Printf("%d: %s\n", a, example.String(a))
}
if b, ok := example.Get("Beta"); ok {
fmt.Printf("%d: %+v\n", b, example.String(b))
}
fmt.Printf("%d:%s\n", Sunday, weekday.String(Sunday))
fmt.Printf("%d:%s\n", Monday, weekday.String(Monday))
}
The output:
Alpha
Beta
=======
0 1
Alpha Beta
=======
0: Alpha
1: Beta
0:Sunday
1:Monday
Ref:
https://github.com/suntong/lang/blob/master/lang/Go/src/ds/EnumsStr1p.go
and
https://github.com/suntong/enum
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