Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change

Re: Print some lines in a range

by chuckbutler (Monsignor)
on Mar 05, 2010 at 01:02 UTC ( #826852=note: print w/replies, xml ) Need Help??

in reply to Print some lines in a range

There is a conflict between using command line option, switch, '-p' which sets up a loop around the '-e' code and using '@lines=<>' which reads the whole file(s), know as a slurp, into the list. A '-p' loop looks like:

LINE: while (<>) { #readline into $_; diamond operator ...<your '-e' code here>... } continue { print or die "-p destination $!\n"; }

Depending on what you are doing, the following may be better:

perl -pe "last if ($cnt > 50000);$_='' if ($cnt++ < 41900);" data02.lo +g > data03.log

This one-liner prints record 41900..50000, zero relative. It will end on record 50001, which should let you have the target file a little sooner.

Good luck. -c

Log In?

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://826852]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others contemplating the Monastery: (2)
As of 2022-08-08 01:52 GMT
Find Nodes?
    Voting Booth?

    No recent polls found