>> I could not model/implement an Object with an internal state changing method in a fp language via a functor. > I don't think anyone claimed that. I was not

>> I could not model/implement an Object with an internal state changing method in a fp language via a functor. > I don't think anyone claimed that. I was not trying to refute the opposite claim. I was giving info on the differences of functors and the referenced oop feature. My points run somewhat counter to the authors claim "Functors are basically an Object with a internal state changing method in typical OOP terms." or at least what I think some reads walk away with. Hard to say what is in the author's head with the provided text. > Now we are getting somewhere. You said partially, what features are being left out? I did not mean to imply features would be left out but rather I would use more than the one oop feature, "an Object with an internal state changing method", to implement functors.