Deleting lines with the perl match operator 1

olded · Jun 24, 2011

Using perl's matching operator, I can extract lines 3, 6, and 9 from a file:

Code:

perl -wnl -e 'print if $. !~ m/^(3|6|9)$/' datafile.txt

Is there syntax for the matching operator that allows deleting a range of lines, say from 3 to 9?

Thanks!

Ed

feherke · Jun 25, 2011

Hi

Code:

perl -pi -e '$_=undef if $.==3..$.==9' datafile.txt

Feherke.

MillerH · Jun 25, 2011

Why not simply use the > and < operators.

Code:

if $. < 3 || $. > 9

- Miller

feherke · Jun 26, 2011

Hi

Miller said:
Why not simply use the > and < operators.

Because of my [tt]sed[/tt] and [tt]awk[/tt] habits.

Regarding the word "simply" :

Code:

perl -pi -e '$_=undef if 3..9' datafile.txt

Feherke.

olded · Jun 27, 2011

feherke:

Thank you. That was helpful.

Ed