Mismatch between the order of the type variable and the order of the SAM method formal parameters

[Brian Goetz]

In general, it is best if methods that have a single lambda parameter have the lambda parameter last.  


On Sep 15, 2011, at 12:30 AM, Rémi Forax wrote:

> Hi all,
> 
> Here is the declaration of a Reducer:
> 
>   interface Reducer<T, U> {
>       U reduce(U base, T t);
>   }
> 
> and how to use it:
> 
>   Reducer<String, Integer> reducer = (Integer i, String s) -> i + 
> s.length();
> 
> As you see the order of the type argument <String, Integer> is not
> the same as the order of the type of the formal parameter of the lambda 
> (Integer i, String s).
> I think it will be simpler if the signature of reduce() was changed to 
> swap the two
> formal parameters.
> 
> Rémi
> 
>