Groups > comp.programming.contests > #21

Re: The First Pure Shell Contest (PUSH): relativepath

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.dougwise.org!gegeweb.org!eternal-september.org!feeder.eternal-september.org!news.swapon.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From	Rainer Weikusat <rweikusat@mssgmbh.com>
Newsgroups	comp.unix.shell, comp.unix.programmer, comp.programming.contests
Subject	Re: The First Pure Shell Contest (PUSH): relativepath
Date	Sun, 21 Aug 2011 15:14:56 +0100
Lines	20
Message-ID	<87fwkuzw9r.fsf@sapphire.mobileactivedefense.com> (permalink)
References	<9b7kg7F3njU1@mid.individual.net> <slrnj5050s.gg9.stephane.chazelas@spam.is.invalid>
Mime-Version	1.0
Content-Type	text/plain; charset=us-ascii
X-Trace	individual.net tXh1ziWzJYCuddb/uHvaTQGuGGLnceJGBWCnKiDR0CjJlRGo0=
Cancel-Lock	sha1:vesb8GfDr9YVbF0pkleptFqPiyY= sha1:QNLs5rDBZKmG8kmKTIiVa/O9o50=
User-Agent	Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux)
Xref	x330-a1.tempe.blueboxinc.net comp.unix.shell:1771 comp.unix.programmer:1173 comp.programming.contests:21

Cross-posted to 3 groups.

Show key headers only | View raw

Stephane CHAZELAS <Stephane.CHAZELAS@free.fr> writes:
> 2011-08-19, 17:23(+00), Jens Schweikhardt:
> [...]
>> Write a POSIX shell function named 'relativepath' which takes as
>> arguments two absolute canonicalized pathnames, and stores the relative
>> path from the first to the second in the variable "result" or "." when
>> the arguments are the same. Example: relativepath /foo/bar /foo/baz sets
>> result to "../baz".
> [...]
>
> In the not-answering-the-question category, what about:
>
>  printf '%s\n' "$1//$2/"|sed -e:1 -e'$!{N;b1' -e} -e'
>        s|/////*|///|;s|\(.*/\)\(.*/\)\1|\2|;:2
>            s|^[^/]*/\(\(.*/\)*/\)|\1../|;t2
>                 s|^/||;s|/$||;s/^$/./'

It's a nice demonstration that some people really excel in the art of
creating complicated solutions to simple problems.

Back to comp.programming.contests | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <schweikh@schweikhardt.net> - 2011-08-19 17:23 +0000
  Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-19 18:13 +0000
    Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 19:12 +0000
      Re: The First Pure Shell Contest (PUSH): relativepath pk <pk@pk.invalid> - 2011-08-19 21:14 +0200
        Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 19:29 +0000
          Re: The First Pure Shell Contest (PUSH): relativepath pk <pk@pk.invalid> - 2011-08-19 21:37 +0200
            Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 20:04 +0000
              Re: The First Pure Shell Contest (PUSH): relativepath pk <pk@pk.invalid> - 2011-08-19 22:25 +0200
                Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 21:08 +0000
  Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-19 19:58 +0100
    Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 19:23 +0000
      Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-19 22:18 +0100
  Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <Stephane.CHAZELAS@free.fr> - 2011-08-20 20:07 +0000
    Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-21 10:43 +0000
    Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-21 15:14 +0100
      Re: The First Pure Shell Contest (PUSH): relativepath Janis Papanagnou <janis_papanagnou@hotmail.com> - 2011-08-21 18:28 +0300
      Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-21 16:19 +0000
        Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-21 20:12 +0000
  Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-22 21:15 +0100
    Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-23 18:23 +0000
      Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-23 19:52 +0100
        Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-23 21:56 +0000

csiph-web