Mismatch between the order of the type variable and the order of the SAM method formal parameters
Rémi Forax
forax at univ-mlv.fr
Thu Sep 15 00:30:05 PDT 2011
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
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