Re: Two line match

s/-----\n-----/------/g or s/-----\n+-----/------/g both should work, but only if you have both lines in $_.

If you read your files with a standard loop like this:

while (<>)[ 
    # substition here
}
[download]

it can never work, because there's only one line in $_ when you run the substition.

Comment on Re: Two line match Select or Download Code

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Re^2: Two line match by jrosenfeld (Initiate) on Mar 10, 2008 at 15:21 UTC
I am trying to do it as a one-liner on the command line using cat foo.txt \| perl -p -e 's/-----\n-----/------/g' and it does not do anything. Is there a problem with multiple lines and command-line matching? Jeff	[reply]
Re^3: Two line match by moritz (Cardinal) on Mar 10, 2008 at 15:25 UTC
The `-p` option enables line-by-line processing, so you have to change perls notion of a line: `perl -pe 'BEGIN { $/ = undef }; s/---\n---/---/g;'` [download]	[reply] [d/l] [select]
Re^4: Two line match by jrosenfeld (Initiate) on Mar 10, 2008 at 15:38 UTC
That works except that it only converts two lines of ----- into one. I wanted it to be able to convert any number of lines on ----- into 1 line of it. Shouldn't the /g do that? Jeff	[reply]
Re^5: Two line match by moritz (Cardinal) on Mar 10, 2008 at 15:43 UTC
Re^3: Two line match by grizzley (Chaplain) on Mar 10, 2008 at 16:12 UTC
use -0 to read whole file at once: `cat foo.txt \| perl -p0 -e 's/-----\n\n-----/------/g'` [download]	[reply] [d/l]
Re^4: Two line match by jrosenfeld (Initiate) on Mar 10, 2008 at 16:47 UTC
Thank you for the suggestion, but it only takes two lines and converts it into 1. I would like a one-liner to convert any number of lines of: ------ into one line of it. Jeff	[reply]
Re^5: Two line match by grizzley (Chaplain) on Mar 10, 2008 at 18:17 UTC