Re: Mixing OO and DB
Date: Tue, 26 Feb 2008 07:46:04 -0800 (PST)
On Feb 24, 7:35 am, Robert Martin <uncle..._at_objectmentor.com> wrote:
> On 2008-02-22 13:54:40 -0600, Marshall <marshall.spi..._at_gmail.com> said:
> Mutability is one kind or property that is not substitutable accross
> circle/ellipse relationship. I'm sure we could find others.
I'm not sure. In fact I'm fairly confident that we could not.
forall x: forall y: x = y -> f(x) = f(y)
is an uncontroversial mathematical statement.
Marshall Received on Tue Feb 26 2008 - 16:46:04 CET