On Thursday, August 3, 2017 at 12:55:44 PM UTC-4, Kaviraj Kanagaraj wrote:
>
> Can someone help me understand whats the main difference two different
> UserType in below snippet.?
>
> More importantly when to use which.
>
> ```
> type UserType string
>
> const (
> Undefined UserType = "undefined"
> Admin UserType = "admin"
> )
>
> type UserType int
>
> const (
> Undefined UserType = iota
> Admin
> )
>
> func (u UserType) String() string {
> switch u {
> case Undefined:
> return "undefined"
> case Admin:
> return "admin"
> }
> return "UserType" + strconv.Itoa(int(u))
> }
> ```
>
> Some obvious differences including
> 1. More memory usage in case string based type
>
why?
> 2. Usefull zero-value in case of int based type.
>
> I just wanted to know is there any rule of thumb to decide when to use
> which.
>
Besides we can declare methods on custom types,
custom types will get a better readability and can avoid mis-assignments.
>
> Thanks in advance.
>
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