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Re: [Chicken-users] New immediate values (was: DBI)
From: |
John Cowan |
Subject: |
Re: [Chicken-users] New immediate values (was: DBI) |
Date: |
Fri, 29 Feb 2008 09:24:07 -0500 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Alaric Snell-Pym scripsit:
> >Gensym values aren't disjoint *in type* from anything else.
>
> Ah, but disjointness in value is all that's required...
Technically yes, but most of us find predicates like number?, string?,
and symbol? rather handy all the same, and don't want NULL mixed up
with them. C programmers may be happy with a world where integers,
characters, and booleans are the same thing, but should we be? It was
not for nothing that Codd made sure his nulls (later divided into A-marks
for the unknown and I-marks for the inapplicable) were quite independent
of concrete types.
--
John Cowan http://ccil.org/~cowan address@hidden
All "isms" should be "wasms". --Abbie
- Re: [Chicken-users] New immediate values (was: DBI), (continued)
- Re: [Chicken-users] New immediate values (was: DBI), felix winkelmann, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), Graham Fawcett, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), Tobia Conforto, 2008/02/29
- Re: [Chicken-users] New immediate values (was: DBI), Graham Fawcett, 2008/02/29
- Re: [Chicken-users] New immediate values, Ozzi Lee, 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), 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 <=
- 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, 2008/02/29
- 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