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From: Richard Stallman <rms@gnu.org>
To: "Juanma Barranquero" <lekktu@gmail.com>
Cc: dmantipov@yandex.ru, emacs-devel@gnu.org
Subject: Re: Using empty_string as the only "" string
Date: Tue, 24 Apr 2007 22:05:14 -0400	[thread overview]
Message-ID: <E1HgWsc-0001bY-3u@fencepost.gnu.org> (raw)
In-Reply-To: <f7ccd24b0704241005j7a4d5108h86d70c169eba26d9@mail.gmail.com> (lekktu@gmail.com)

    ELISP> (eq (substring "ab" 0) (substring "ab" 0))
    nil
    ELISP> (eq (substring "ab" 1) (substring "ab" 1))
    nil
    ELISP> (eq (substring "ab" 2) (substring "ab" 2))
    t

    That doesn't seem a nice behaviour.

Any program that _depends_ on eq to return nil in the last case 
is taking a risk.

  parent reply	other threads:[~2007-04-25  2:05 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-24 16:32 Using empty_string as the only "" string Dmitry Antipov
2007-04-24 17:05 ` Juanma Barranquero
2007-04-24 18:11   ` Andreas Schwab
2007-04-24 18:50     ` Juanma Barranquero
2007-04-24 21:38       ` Andreas Schwab
2007-04-24 21:54         ` Juanma Barranquero
2007-04-24 22:11           ` Andreas Schwab
2007-04-24 22:54             ` Juanma Barranquero
2007-04-24 21:57         ` David Kastrup
2007-04-24 22:07           ` Lennart Borgman (gmail)
2007-04-24 22:29             ` David Kastrup
2007-04-24 22:35               ` Andreas Schwab
2007-04-25  0:55                 ` Kenichi Handa
2007-04-25  9:51                   ` Andreas Schwab
2007-04-25  9:58                     ` David Kastrup
2007-04-25 10:50                       ` Andreas Schwab
2007-04-24 22:40               ` Lennart Borgman (gmail)
2007-04-24 22:12           ` Andreas Schwab
2007-04-24 22:31             ` David Kastrup
2007-04-24 22:56               ` Andreas Schwab
2007-04-24 21:39       ` Miles Bader
2007-04-24 21:45         ` Juanma Barranquero
2007-04-24 22:11           ` Miles Bader
2007-04-24 22:59             ` Juanma Barranquero
2007-04-24 23:37               ` Miles Bader
2007-04-24 23:44                 ` Johan Bockgård
2007-04-25  1:47                   ` Miles Bader
2007-04-25 14:52                   ` Richard Stallman
2007-04-26 15:03                     ` Daniel Brockman
2007-04-27 20:40                       ` Richard Stallman
2007-04-25  2:05       ` Richard Stallman
2007-04-25 12:00         ` Juanma Barranquero
2007-04-25  2:05   ` Richard Stallman [this message]
2007-04-24 17:48 ` Stefan Monnier
2007-04-25  2:05   ` Richard Stallman
2007-04-26 14:24   ` Dmitry Antipov
2007-04-25  2:05 ` Richard Stallman
  -- strict thread matches above, loose matches on Subject: below --
2007-04-25  5:38 using " dmantipov
2007-04-25  5:49 ` Miles Bader
2007-04-25 11:50 ` Juanma Barranquero
2007-04-25 11:56 ` Kenichi Handa
2007-04-25 13:22   ` Dmitry Antipov
2007-04-25 16:07     ` Stefan Monnier
2007-04-26  4:23 ` Richard Stallman
2007-04-26 13:03   ` Dmitry Antipov
2007-04-27  6:00     ` Richard Stallman
2007-04-27 10:04       ` Dmitry Antipov
2007-04-27 10:29         ` David Kastrup
2007-04-28  4:06         ` Richard Stallman
2007-04-28  8:54           ` Dmitry Antipov
2007-04-28 18:35             ` Richard Stallman
2007-06-05 15:43               ` Juanma Barranquero
2007-06-05 19:17                 ` Richard Stallman
2007-06-05 19:45                   ` Juanma Barranquero
2007-06-06  1:17                     ` Stefan Monnier
2007-06-06 11:04                       ` Juanma Barranquero
2007-06-06 22:09                         ` Richard Stallman
2007-06-08 15:49                           ` Juanma Barranquero
2007-06-08 19:16                             ` Stefan Monnier

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