Re: Mixing OO and DB
From: Marshall <marshall.spight_at_gmail.com>
Date: Fri, 15 Feb 2008 08:27:16 -0800 (PST)
Message-ID: <4a2edfa8-59fc-47df-a3de-0078dfe28f59_at_d21g2000prf.googlegroups.com>
Date: Fri, 15 Feb 2008 08:27:16 -0800 (PST)
Message-ID: <4a2edfa8-59fc-47df-a3de-0078dfe28f59_at_d21g2000prf.googlegroups.com>
On Feb 14, 8:59 pm, David BL <davi..._at_iinet.net.au> wrote:
>
> ... variables can be read (as
> well as written), which means it isn't true that a pointer to an
> ellipse variable is a pointer to a circle variable.
The problem arises when you have all of:
You can't pin the problem on any one of these; the problem
is in the combination.
1) mutability
2) first-class variables
3) subtyping
Marshall Received on Fri Feb 15 2008 - 17:27:16 CET