Hello! I see myself having to often call count() as a terminal operation on a Stream immediately after performing a filter operation. How feasible would it be to add an overloaded count() method that accepts a Predicate, which it uses as a filter before returning the count of elements in the Stream? If this is supported, I'd gladly create the webrev & tests for it!
I suppose the method signature can be something along the lines of: long count(Predicate<? super T> predicate) It would also seem reasonable to give this method to IntStream, DoubleStream, and LongStream, but allowing them to use IntPredicate, DoublePredicate, and LongPredicate respectively. Thanks, Jacob Glickman