You have less indirection with the interface. More ergonomic.
An interface also allows to define a set of constraints whereas the first
class function does not coerce you into having a defined set of function
arguments.
On Sunday, November 20, 2016 at 6:22:57 AM UTC+1, Henry wrote:
>
> Hi,
>
> I am wondering from best practice point of view whether it is better to
> use interface or first-class function, especially considering that Go
> encourages the use of small interfaces. Here is an example:
>
> type SomethingDoer interface{
> DoSomething(data Data)
> }
>
> func PerformWork(doer SomethingDoer){
> //...
> }
>
> Or
>
> type SomethingDoer func(Data)
>
> func PerformWork(doer SomethingDoer){
> //...
> }
>
> Is there some sort of a guideline when to use one vs the other? They seem
> like redundant features to me.
>
> Thanks
>
> Henry
>
>
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