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Functional vs. OO 7 Comments More | Login | Reply /

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  • OO is about data.

    I think OO is about the behavior of models. Why do you think it's about data?

    • I think OO is about the behavior of models. Why do you think it's about data?

      Well, I was really thinking of Steve Yegge's rant on nouns vs. verbs [blogspot.com].

      In OO every class is really a 'data type'. Even in perl where there are no types :). The essence of OO is to have an object, say $obj, that is data of some type and to have methods that act upon that data: $other_obj = $obj->transform.

      Sure you can have objects that don't 'contain' any data and only methods. But you end up with an ugly looking model, IMH

      • In OO every class is really a 'data type'.

        Not the way I write code. If I can create classes without data, I do. (Of course, I've also argued If we can solve problems without computers, perhaps we should. [oreillynet.com])

        • Not the way I write code. If I can create classes without data, I do.
          But then isn't the class just a namespace with a bundle of functions?

          • Re:Data? (Score:1)

            by chromatic (983) on 2006.12.10 19:12 (#52195) Homepage Journal

            It is, only in the same way that a function is just a jmp/ret pair. From the external point of view, a class is just a collection of behavior, not data. That's the important point.

            • You may well be right and it may be the best way to think about object-oriented design, but I think most people think of it differently, for example the McGraw Hill dictionary of technology [answers.com]:

              A computer programming methodology that focuses on data rather than processes

              On the other hand TechWeb says:

              Writing software that supports a model wherein the data and their associated processing (called "methods") are defined as self-contained entities called "objects."

              But the whole thing seems confused, the wik

              • Your way of thinking about it may be the best way to simplify design.

                Thanks! I have had roles banging around in my head for a bit over three years now.

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