Re: OO Methodolgy Perspective

On Mon, 18 Feb 2008 17:01:48 +0000, H. S. Lahman wrote:


One of the problems with Structured Programming was that everything
about the solution was expressed in computing space terms. (The notion
of 'analysis' was applied to requirements; understanding what the
problem was.)

...[SNIP]....

Similarly, OOD is an elaboration of the OOA solution that addresses the
strategic needs of the computing space to address nonfunctional

...[SNIP]....

(One doesn't use OO
techniques to write a Quicksort program even if one can identify object
abstractions like PivotPoint and Partition in the algorithm.)


WOW, one of the most intuitive explanations I have ever see, though not of
my kind of thinking style.


Don't kid yourself that the OOP-based agile methods don't do OOA/D. Many
of the OOA/D construction techniques have been factored into things like
design patterns and refactoring practices. In addition, all the
OOP-based agile processes have OOA/D steps built into them (e.g., XP's
System Metaphor, CRC cards, etc.).

I know that DPs came from OO but did not know that Agile also came out
from there,that surprises me.


I haven't talked to Richard in over 40 years, but back in the '60s he
...SNIP....

He was also very much a Free Spirit;

yep, me too :)


I would be surprised if
he would embrace Structured Programming, much less a paradigm like OO
that imposes counterintuitive discipline on the development.

get surprised then. I had an email conversation with RMS where I asked him
to guide me on which part of GNU project I should work on. I said I
have only 2 skills to offer: C++ and OOA/M/D. He said *something-like*
this:

"I do not like C++ as a language, it is complex and clumsy. GNU software
do not use OO techniques. There was great noise over OOA/D in the 90s but
after some years of research I do not think it is much better. We mostly
use C. Good luck for your job search and you can't help much here"


[If he did
start using OOPLs, I'll bet the code looks just like Alan Holub's --
procedural C programs with strong typing. B-)]

:D



As far as open-source is concerned, from what I have seen of it, it is
driven more by developer culture (i.e., kindred spirits gravitate to one
another) than technical concerns.

point to be noted, my lord ;)


My
thumb-nail characterization is that people who want to be in complete
control of the machine at the code level gravitate to open-source while
those who are more process-oriented tend to migrate to more formal,
model-oriented development.

Aha... here you go...

I Love system programming. Now I can see the connection emerging, a
Patterns is becoming clearer to me.

Once, I spent 24 hours without any food at all and with only 1 glass of
water, I was sitting in front of my computer reading articles about OS
developemnt, Hurd papers and UNIX Programming and what not else. I did not
even realise that I was hungry. I never did that for C++ or OO. After 18
hours of continuous work I realised that I forgot something and after 17
more minutes it came to me that I forgot to eat my lunch and dinner :P .
What more I still did not not wat or drink anyting for next 7 or 8 hours.

So may be that's the system-programing brain that feels some anti-thinking
to OO idea.


OTOH, I think plenty of open source software is done using the OO
paradigm. In fact, I think the OOP-based agile processes are ideally
suited to open-source (provided somebody has already made the overall
systems engineering).

I agree about agile but and not about OOA/M/D model.


BTW, thanks a lot for taking out time to write sucha a lengthy and
exlanative post. It was quite helpful and will help many newbies in the
future :)


--
http://lispmachine.wordpress.com/

.

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