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Re: Using empty_string as the only "" string
From: |
Andreas Schwab |
Subject: |
Re: Using empty_string as the only "" string |
Date: |
Tue, 24 Apr 2007 23:38:17 +0200 |
User-agent: |
Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.97 (gnu/linux) |
"Juanma Barranquero" <address@hidden> writes:
> On 4/24/07, Andreas Schwab <address@hidden> wrote:
>
>> I see nothing wrong with that.
>
> I do see it. The issue is not string comparison, but object identity.
> It's no different from
>
> (eq 0.0 0.0) => nil
>
> I would be mightily surprised if
>
> (eq (- 2.0 0.0) (- 2.0 0.0)) => nil
> (eq (- 2.0 1.0) (- 2.0 1.0)) => nil
> (eq (- 2.0 2.0) (- 2.0 2.0)) => t
>
> were true.
In which way is this different from
(eq (cdr '(a)) (cdr '(b))) => t
?
Andreas.
--
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
- Using empty_string as the only "" string, Dmitry Antipov, 2007/04/24
- Re: Using empty_string as the only "" string, Juanma Barranquero, 2007/04/24
- Re: Using empty_string as the only "" string, David Kastrup, 2007/04/24
- Re: Using empty_string as the only "" string, Lennart Borgman (gmail), 2007/04/24
- Re: Using empty_string as the only "" string, David Kastrup, 2007/04/24
- Re: Using empty_string as the only "" string, Andreas Schwab, 2007/04/24
- Re: Using empty_string as the only "" string, Kenichi Handa, 2007/04/24
- Re: Using empty_string as the only "" string, Andreas Schwab, 2007/04/25
- Re: Using empty_string as the only "" string, David Kastrup, 2007/04/25