These are from algebra.Monoid
Returns an instance of
T calculated by summing all instances in iter in one pass.
Returns an instance of
T calculated by summing all instances in iter in one pass. Returns None if
iter is empty, else Some[
T].
instances of
T to be combined
None if iter is empty, else an option value containing the summed
T
Group and Ring ARE NOT AUTOMATIC. You have to check that the laws hold for your Applicative. If your M[_] is a wrapper type (Option[_], Some[_], Try[_], Future[_], etc...) this generally works.