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Re: Using empty_string as the only "" string
From: |
David Kastrup |
Subject: |
Re: Using empty_string as the only "" string |
Date: |
Tue, 24 Apr 2007 23:57:23 +0200 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.98 (gnu/linux) |
Andreas Schwab <address@hidden> writes:
> "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
'(a) is (cons 'a nil), '(b) is (cons 'b nil),
so indeed the cdr of both lists is the identically same value. Lists
are _identically_ grounded.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
- 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, Andreas Schwab, 2007/04/24
- Re: Using empty_string as the only "" string, Juanma Barranquero, 2007/04/24
- Re: Using empty_string as the only "" string, Andreas Schwab, 2007/04/24
- Re: Using empty_string as the only "" string, Juanma Barranquero, 2007/04/24
- Re: Using empty_string as the only "" string, Andreas Schwab, 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 <=
- 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
- Re: Using empty_string as the only "" string, Andreas Schwab, 2007/04/25
- Re: Using empty_string as the only "" string, Lennart Borgman (gmail), 2007/04/24
- Re: Using empty_string as the only "" string, Andreas Schwab, 2007/04/24
- Re: Using empty_string as the only "" string, David Kastrup, 2007/04/24