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Re: [Chicken-users] DBI
From: |
felix winkelmann |
Subject: |
Re: [Chicken-users] DBI |
Date: |
Fri, 29 Feb 2008 16:41:57 +0100 |
On Thu, Feb 28, 2008 at 4:02 PM, Graham Fawcett
<address@hidden> wrote:
>
> It would be a smart idea to change the implementation, then, so that
> the unspecified value could not be tested with (eq?). That would
> prevent it from being 'misused'.
The unspecified value is unspecified. It has both no identity and
no efforts are made to make it identity-less.
>
> There does seem to be a good case for an immediate value that *can* be
> tested this way, though. John et. al. wouldn't have used (void) in
> eggs if there weren't. Record instances aren't really a great answer
> (though I suggested them myself) since different records of the same
> type will fail an identity test.
Unless you use a single unique instance.
cheers,
felix
- Re: [Chicken-users] New immediate values (was: DBI), (continued)
- Re: [Chicken-users] New immediate values (was: DBI), Alaric Snell-Pym, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), John Cowan, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), Alaric Snell-Pym, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), John Cowan, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), Alaric Snell-Pym, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), John Cowan, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), felix winkelmann, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), John Cowan, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), Thomas Chust, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), John Cowan, 2008/02/29
- Re: [Chicken-users] DBI,
felix winkelmann <=
- Re: [Chicken-users] DBI, Graham Fawcett, 2008/02/29
- Re: [Chicken-users] DBI, Tobia Conforto, 2008/02/29
- Re: [Chicken-users] DBI, Graham Fawcett, 2008/02/27
- Re: [Chicken-users] DBI, Vincent Manis, 2008/02/27
- Re: [Chicken-users] DBI, Peter Bex, 2008/02/28
- Re: [Chicken-users] DBI, Graham Fawcett, 2008/02/28
- Re: [Chicken-users] DBI, Peter Bex, 2008/02/28
- Re: [Chicken-users] DBI, Graham Fawcett, 2008/02/28
- Re: [Chicken-users] DBI, Peter Bex, 2008/02/28
- Re: [Chicken-users] DBI, Graham Fawcett, 2008/02/28