reduce(_:_:)
Declaration
func reduce<T>(_ initialResult: T, _ nextPartialResult: @escaping (T, Publishers.Sequence<Elements, Failure>.Output) -> T) -> Result<T, Failure>.Publisherfunc reduce<T>(_ initialResult: T, _ nextPartialResult: @escaping (T, Publishers.Sequence<Elements, Failure>.Output) -> T) -> Result<T, Failure>.Publisher