From: Mark Wilden <mark@...>
Date: 2008-05-30T22:28:07+09:00
Subject: Re: The duck's backside

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On May 29, 2008, at 3:47 AM, Michael T. Richter wrote:

> On Thu, 2008-05-29 at 07:23 +0900, Mark Wilden wrote:
>>
>> One of the purposes of classes in OOP is to categorize things.
>
> One of the weaknesses of classic Booch, et al OOP is that one of the  
> purposes of classes in OOP is to categorize things.
>
> Classes in classic OOP languages conflate a variety of concepts and  
> cram them into one structure which does none of them particularly  
> well:
> Classes are the unit of state.
> Classes are the unit of access control.
> Classes are the unit of functional dispatch.
These are simply the attributes of a type: a set of possible values  
and a set of possible operations.

///ark


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