From: Juanma Barranquero <lekktu@gmail.com>
To: MON KEY <monkey@sandpframing.com>
Cc: Chong Yidong <cyd@stupidchicken.com>,
Andreas Schwab <schwab@linux-m68k.org>,
6878@debbugs.gnu.org
Subject: bug#6878: bool-vectors of length 0 signal error when aref/aset the 0th element
Date: Fri, 20 Aug 2010 04:23:52 +0200 [thread overview]
Message-ID: <AANLkTimOzyvc8fiNWEmN4GNxkqcGe_Qf-Os3Q51n-UU4@mail.gmail.com> (raw)
In-Reply-To: <AANLkTinGrxR9qZqMspeUgNDfdCjdU3F4QAZTMTDA_DvV@mail.gmail.com>
On Fri, Aug 20, 2010 at 04:01, MON KEY <monkey@sandpframing.com> wrote:
> Emacs lisp doesn't and I can think of no good reasons to create 0
> length bool-vectors.
>
> Can any one else?
Of course. Eliminating special cases, for example.
(defun split-vec (v p)
(list (substring v 0 p)
(substring v p (length v))))
and you can do
(apply 'vconcat (split-vec V N))
for N in -length(V)..length(V) and get back V
Juanma
next prev parent reply other threads:[~2010-08-20 2:23 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-18 4:19 bug#6878: bool-vectors of length 0 signal error when aref/aset the 0th element MON KEY
2010-08-18 7:36 ` Stefan Monnier
2010-08-19 1:51 ` MON KEY
2010-08-19 8:42 ` Andreas Schwab
2010-08-19 14:13 ` MON KEY
2010-08-19 15:51 ` Stefan Monnier
2010-08-19 17:06 ` MON KEY
2010-08-19 14:47 ` Stefan Monnier
2010-08-19 15:04 ` Andreas Schwab
2010-08-19 16:18 ` Chong Yidong
2010-08-19 17:09 ` MON KEY
2010-08-19 18:40 ` Juanma Barranquero
2010-08-19 23:24 ` Chong Yidong
2010-08-20 2:01 ` MON KEY
2010-08-20 2:23 ` Juanma Barranquero [this message]
2010-08-20 18:01 ` MON KEY
2010-08-20 19:49 ` Juanma Barranquero
2010-08-20 23:06 ` MON KEY
2010-08-20 13:02 ` Stefan Monnier
2010-08-20 18:44 ` MON KEY
2010-08-21 12:40 ` Kevin Rodgers
2010-08-21 15:53 ` Andreas Schwab
2010-08-21 17:02 ` MON KEY
2010-08-18 8:36 ` Andreas Schwab
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