From: Pietro Gagliardi <pietro10@mac.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] Acme aborts on a pointless Edit command
Date: Sun, 23 Dec 2007 23:28:16 -0500 [thread overview]
Message-ID: <3B5C3784-0F7A-41AA-9376-7E579254ACD4@mac.com> (raw)
In-Reply-To: <20071224041704.GA14349@dinah>
THE UNIX PROGRAMMING ENVIRONMENT by Kernighan and Pike to the rescue!
According to Appendix A, to reverse lines,
g/^/m0
Or, better yet, in rc:
awk '
{ x[NR] = $0}
END {
for (i = NR; i >= 1; i--)
print x[i]
}'
On Dec 23, 2007, at 11:17 PM, Anthony Martin wrote:
> I was feeling obscene and decided to test out stupid
> commands in sam and acme. Here's something I didn't
> expect.
>
> Sam:
> , x g/^/m. no change to file
>
> Acme (Edit):
> , x g/^/m. aborts in /sys/src/cmd/acme/ecmd.c:/^move
>
> It aborts because "move overlaps itself" but the
> question I have is, should it work like sam and
> do *visually* nothing at all?
>
>
> Anthony
>
> P.S.
> This came about because I was trying to find a way to
> move lines matching a certain pattern to the beginning
> of a file (like g/pattern/m0 in ed). Is there a nice
> way to do this in sam?
>
> Something that works like the ed command but leaves the
> lines in original order, not reversed, would be even
> better.
>
> --
> I spent a night with a blow-up girl and some LSD. -Freeheat
next prev parent reply other threads:[~2007-12-24 4:28 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-24 4:17 Anthony Martin
2007-12-24 4:28 ` Pietro Gagliardi [this message]
2007-12-24 4:37 ` Anthony Martin
2007-12-24 9:50 ` Rob Pike
2007-12-24 5:25 ` erik quanstrom
2007-12-24 17:24 ` Joel C. Salomon
2007-12-24 17:35 ` Pietro Gagliardi
2007-12-25 1:51 ` [9fans] ipod + plan9 Philipp
2007-12-25 5:20 ` Pietro Gagliardi
2007-12-26 12:52 ` [9fans] Acme aborts on a pointless Edit command roger peppe
2007-12-26 17:52 ` ron minnich
2007-12-27 3:36 ` Rob Pike
2007-12-28 6:08 Joshua Wood
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