Applying the Law of Demeter

[Max M]

John Ochiltree wrote:
> "Peter Hansen" <peter at engcorp.com> wrote in message

> Also, I've never come across the 'Law of Demeter'. is it something like the
> succession of the priests of Diana :-) Please enlighten me.


It's about hiding implementation behind an interface.

so instead of going through a native data structure direcly by writing::

     mb = MailBox()
     mb.mails[1].print()

You implement a function that hides the data structure, a bit like this, 
instead::

     mb = MailBox()
     mb.printMail(1)

This makes for more robust code, that is easier to refactor later on.

It is a short and simple example I hope can be understood. If not, try 
Google instead ;-)


regards Max M

-- 

hilsen/regards Max M

http://www.futureport.dk/
Fremtiden, videnskab, skeptiscisme og transhumanisme