Re: Computerworld lists obsolete job titles

Dr. Allan Kay (the one who "invented" OOP) :

"
OOP to me means only messaging, local retention and protection and hiding
of state-process, and extreme late-binding of all things.
"

http://userpage.fu-berlin.de/~ram/pub/pub_jf47ht81Ht/doc_kay_oop_en

So the most important "thing" in OOP, and SWD in general, is to de-couple
code, and manage / control state. So if you have *good* experience with
*modular* programming (not just using procs instead of subs which is just
syntax), using *MODULEs and *SRVPGMs, then you're already 80% there (i.e.
you know the important concepts).









On Tue, Dec 9, 2014 at 10:58 AM, D*B <dieter.bender@xxxxxxxxxxxx> wrote:

<Kurt>
"Oh, a method is like a procedure."
</Kurt>

that's less than 10% of the truth, the diffrences are the most important

thing to understand Java and OO Design:

- in OO methods will be overridden
- methods will be overloaded
- a method lives in an object (that's very diffrent from to be a part of

a class)

- each object has it's own namespace (so I could have hundred methods

named read)

If you would compare the sources of jtOpen with the sources of true Java

projects, or if you would have a look to the examples in IBM redbooks you
could see, where you'll end up following analogies between procedural
languages and OO languages: procedural code written in a crippled OO
language.

D*B
--
This is the RPG programming on the IBM i (AS/400 and iSeries) (RPG400-L)

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