Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic
 
PerlMonks  

Re^3: Removing double carriage return

by Cristoforo (Deacon)
on Aug 23, 2011 at 04:58 UTC ( #921824=note: print w/replies, xml ) Need Help??


in reply to Re^2: Removing double carriage return
in thread Removing double carriage return

From the command line, this replaces 3 or more newlines with 2 newlines or replaces exactly 2 newlines with 1 newline.

perl -i.bak -0777 -pe 's/(\n{3,}|\n\n)/2 == length $1 ? "\n" : "\n\n"/eg' inputfile

Notice that this looks for the longest match first (so that 2 newlines won't match more than 2, i.e. 3 or more).

Update: That could be simplified to:

perl -i.bak -0777 -pe 's/\n+/2 < length $& ? "\n\n" : "\n"/ge' inputfile

Replies are listed 'Best First'.
Re^4: Removing double carriage return
by dragooneye (Novice) on Aug 26, 2011 at 17:29 UTC
    Sorry for the late reply. Thanks Cristoforo for the one liner solution. I'll need to read up on the slurp switch. I hope that this will help others.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://921824]
help
Chatterbox?
[NetWallah]: /stevieb I dont understand - the poster had a very legitimate issue, and expressed it clearly. WHat did you have a problem with?

How do I use this? | Other CB clients
Other Users?
Others lurking in the Monastery: (15)
As of 2017-02-23 14:52 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Before electricity was invented, what was the Electric Eel called?






    Results (347 votes). Check out past polls.