Re: Interesting take on Paradigms (OO vs Procedural)


"Richard" <riplin@xxxxxxxxxxxx> wrote in message
news:c3525524-b3c3-451e-b747-69eea559fc18@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Mar 29, 6:08 am, "Rick Smith" <ricksm...@xxxxxxx> wrote:
<http://www.cs.berkeley.edu/~jrs/4/lec/14>
-----
Why did the originators of object orientation rename "structures" to
"objects"
and "procedures" to "methods"?

Because they weren't 'programmers', they were simulation modellers.
Simula was/is a language for writing computer based simulations. For
example a petrol (gas) station will have a number of pumps, staff and
cars will arrive at various rates wanting various products and
services. Queuing theory will show some features, such as average
wait times, but simulation will give more information.

What is required in a simulation language is the ability to specify
different behaviours in the various objects being simulated. Some
drivers will bypass a gas station if the queue looks too long, or will
wait a variable time in the queue before giving up. 'classes',
'objects' and 'methods' is the language (jargon) of this activity, and
has been since before there were computers.

The book "Simulation Using GPSS", Thomas J. Schriber,
1974, covers the use of General Purpose Simulation System
to accomplish discrete event simulation. I find no mention of
"class", "object", or "method" in this book; thus, apparently,
these terms are not in the jargon of GPSS users. The author
uses procedural languages as a model for explaining the use
of GPSS.


.

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