Darren New escreveu:
> http://en.wikipedia.org/wiki/Abstract_data_type
> 
> ADT is abstract data type, which is *not* "an opaque object" in the 
> object-oriented programming sense.

it's opaque if you don't mess with it directly.  It was the old 
procedural way of doing OO-like programming in languages with not enough 
encapsulation abstraction.

It reminds me of a great Larry Wall quote (Perl's creator is full of 
priceless quotes):

"In Perl culture, for instance, you're expected to stay out of someone's 
home because you weren't invited in, not because there are bars on the 
windows."
source: http://tinyurl.com/34kjkcb

He was talking about packages/modules encapsulation though.


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