From: Mark Wilden <mark@...>
Date: 2008-05-25T22:42:03+09:00
Subject: Re: How to model something

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>
> Hi,
> my programm needs to store persons. They have a weight and a gender.  
> You
> are only allowed to ask males for their weight, females will throw
> dishes/exceptions. There *is* a method to change someones gender.
>
> I could have 'if gender' in every accessor

That seems like the simplest approach. The person object is the one  
who's creating this restriction - weight shouldn't know about gender  
and gender shouldn't know about weight. Wouldn't that only affect one  
accessor - weight?

///ark


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