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Re: Learning Java

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On 4/29/2012 7:00 AM, Arved Sandstrom wrote:
> What's been missing is a
> general acknowledgement that we write a *lot* of procedural Java code,
> and maybe work on ways to formalize how to do that well. DCI is one
> approach.


Hmm, perhaps.  However, I had to learn OOD on my own (I graduated before 
it came fully into vogue), and I've always been keenly aware that the 
need for procedural code in OOD seems to be general accepted.

To go back to one of the earliest sources, if you pick up a copy of 
Bjarne Stroustrup's The C++ Language, there's a chapter (#23) that 
explains his basic OOD philosophy.  As a pedagogical example, he designs 
a simple parser.

First, he makes some simple objects that correspond to the leaf nodes in 
a parse tree.  Then he designs the actual tree itself.  Then he says 
"Now I need to make it DO something."  And he makes a class that he 
calls a "driver" which is all procedural code and implements the actual 
use cases of his simple parser, using the objects he previously created.

Iirc the Rational design process has a similar division.  I personally 
see procedural elements in design patterns like MVC, where the 
controllers appear to me to be simply drivers like Stroustrup's driver 
(although controllers do preform a more specialized kind of procedural 
function).  I think Arne post here a while back about a design pattern 
that recognized procedural bits in an overall design pattern and called 
them "services."  Etc.

I think procedural method in OOD are recognized, but the may not be 
specifically called out.  It's assumed that you just recognize "Oh 
s/he's writing some procedural code here."  A lot of writing requires 
the user to make a judgement how procedural needs to be, and design 
appropriately.  Reference objects tend to have longer procedural bits, 
but that doesn't obviate the need for pure procedural code when 
required.  App start up and shutdown, for example, tend to be purely 
procedural, and there's not reason to make them otherwise.

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Learning Java Steve Graham <jsgrahamus@yahoo.com> - 2012-04-17 15:03 -0600
  Re: Learning Java markspace <-@.> - 2012-04-17 14:33 -0700
    Re: Learning Java glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-04-17 21:50 +0000
      Re: Learning Java Arne Vajhøj <arne@vajhoej.dk> - 2012-04-17 19:21 -0400
      Re: Learning Java markspace <-@.> - 2012-04-17 16:47 -0700
        Re: Learning Java glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-04-18 02:30 +0000
          Re: Learning Java Arne Vajhøj <arne@vajhoej.dk> - 2012-04-28 21:56 -0400
      Re: Learning Java Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-04-17 21:07 -0300
        Re: Learning Java Arne Vajhøj <arne@vajhoej.dk> - 2012-04-17 22:06 -0400
          Re: Learning Java Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-04-18 07:11 -0300
            Re: Learning Java Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-04-18 06:47 -0500
            Re: Learning Java Lew <lewbloch@gmail.com> - 2012-04-18 10:19 -0700
              Re: Learning Java Lew <lewbloch@gmail.com> - 2012-04-18 10:20 -0700
            Re: Learning Java glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-04-18 21:10 +0000
            Re: Learning Java Gene Wirchenko <genew@ocis.net> - 2012-04-18 15:01 -0700
            Re: Learning Java Arne Vajhøj <arne@vajhoej.dk> - 2012-04-28 22:11 -0400
              Re: Learning Java Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-04-29 11:00 -0300
                Re: Learning Java Lew <noone@lewscanon.com> - 2012-04-29 11:44 -0700
                Re: Learning Java markspace <-@.> - 2012-04-29 16:34 -0700
                Re: Learning Java Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-04-30 20:52 -0300
                Re: Learning Java Arne Vajhøj <arne@vajhoej.dk> - 2012-05-05 18:17 -0400
                Re: Learning Java Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-05-06 15:49 -0300
                Re: Learning Java Gene Wirchenko <genew@ocis.net> - 2012-05-07 09:50 -0700
      Re: Learning Java RedGrittyBrick <RedGrittyBrick@spamweary.invalid> - 2012-04-19 15:30 +0100
  Re: Learning Java Arne Vajhøj <arne@vajhoej.dk> - 2012-04-17 19:26 -0400
  Re: Learning Java Patricia Shanahan <pats@acm.org> - 2012-04-17 19:08 -0700
  Re: Learning Java Roedy Green <see_website@mindprod.com.invalid> - 2012-04-26 16:06 -0700
  Re: Learning Java Steve Graham <jsgrahamus@yahoo.com> - 2012-05-15 17:40 -0600

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