Re: Stingily extracting a block of lines

Hi,
        Another possible solution could be as follows:
        sed -n '{
/bundle/,${
x
G
s/\n/|/g
${
s/[^[.bundle.]]*\(.*\.elm\).*/\1/g
s/|/\
/g
p
}
h
}
}' 1.txt

where 1.txt contains the desired input.

regards,
Kaushik 

sed-users@xxxxxxxxxxxxxxx wrote on 12/08/2005 04:46:17 PM:

> On Thursday 08 December 2005 02:38, you wrote:
> > Entity Angus Leeming spoke thus:
> > >> I want to extract a range of lines beginning with the word 'bundle' 
and
> > >> ending with the word '.eml,'. The 'bundle' delimiter will occur
> > >> repeatedly throughout the file, so I want to use the most recent
> > >> instance (greedy).
> > >>
> > >> How would I do it using sed?
> > >
> > > You're being too vague. Guessing that your data looks like
> > >
> > > the beginning
> > > foo
> > > foo bundle bar 1
> > > bar
> > > baz
> > > foo bundle baz 2
> > > noise
> > > noise
> > > bar .elm
> > > noise
> > > the end
> > >
> > > Then the sed script is simply:
> > >
> > >   sed -n '/bundle/,/\.elm/p' input.txt > output.txt
> >
> > Yes, that is essentially it, but your script returns lines from the 
first
> > instance of bundle, and I want it to return lines starting from the 
last
> > instance in the file.
> 
> Then the solution is a little more involved. Logically, it becomes:
> 
> Step 1. Store all lines from the first "bundle" to ".elm" in the hold 
space.
> Step 2. Move this hold space to the pattern space for further 
processing.
> Step 3. Remove all lines up to the final "bundle".
> 
> Use the sed script below, trial.sed, as
>     sed -n -f trial.sed input.txt > output.txt
> 
> Regards,
> Angus
> 
> /bundle/,/\.elm/{
> # Copy all lines from the first "bundle" to the first ".elm"
> # into the hold space.
> H
> 
> # On reaching ".elm"...
> /\.elm/{
> # Copy the contents of the hold space back into the pattern space.
> g
> 
> # If the pattern space contains more than one "bundle" line
> # then strip everything up to the beginning of the final
> # "bundle" line.
> /bundle[^\n]*\n.*bundle/s/^.*\n\([^\n]*bundle\)/\1/
> 
> # Don't forget to print...
> p
> }
> }
> 
> 
> 
> -- 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 

> ForwardSourceID:NT000191A6 

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