On Wed, 16 Jul 2003 [EMAIL PROTECTED] wrote:
> This is probably a cheat question (non-central Cygwin issue) but it is about
> Cygwin's vanilla sed.
>
> AND it is only asked in order eventually to provide anybody interested with
> the elegant-est possible script for making a portable Cygwin CD.
Someone already mentioned Perl. Another tool is "ed". Both are pretty
heavyweight. If you want to do it in straight sed, examples are below:
> Q1. Querying info sed reveals the expression matcher to be "greedy",
> matching the longest possible string. Is there a way to make it match the
> shortest possible, so that echo aaabbbccc | sed 's/^.*b//' (altered but
> similar) grabs aaab not aaabbb?
Well, the simplest (off the top of my head) would be 's/^[^b]*b//'.
> Q2. Is there a way using the supplied sed without major enhancements to
> change "abc x def" to "def x abc": that is, to grab two distinct portions
> and swap them (using $1,$2 or \1,\2 or whatever).
Sure. 's/^\(.*\) x \(.*\)$/'.
> Sorry for asking: I know it's a sin: hope the end articulated above
> justifies the means.
>
> Fergus
Hope this helps,
Igor
--
http://cs.nyu.edu/~pechtcha/
|\ _,,,---,,_ [EMAIL PROTECTED]
ZZZzz /,`.-'`' -. ;-;;,_ [EMAIL PROTECTED]
|,4- ) )-,_. ,\ ( `'-' Igor Pechtchanski, Ph.D.
'---''(_/--' `-'\_) fL a.k.a JaguaR-R-R-r-r-r-.-.-. Meow!
"I have since come to realize that being between your mentor and his route
to the bathroom is a major career booster." -- Patrick Naughton
--
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Problem reports: http://cygwin.com/problems.html
Documentation: http://cygwin.com/docs.html
FAQ: http://cygwin.com/faq/
