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prints line numbers

Terminal - prints line numbers
perl -pe 'print "$. "' <file>
2009-12-08 16:11:51
User: sputnick
Functions: perl
prints line numbers

No need $_ netp ;)


There is 1 alternative - vote for the best!

Terminal - Alternatives
cat -n
ls | sed "/^/=" | sed "N;s/\n/. /"
2010-01-06 16:00:39
User: glaudiston
Functions: ls sed

the sed way to print line numbers

grep -n "^" <filename>
2010-01-07 14:54:29
User: JohnGH
Functions: grep

If you don't have nl on your system, this achieves a similar effect, the default behavior in nl is to not number blank lines, but this does.

perl -e 'use strict; use warnings; my $c; my $file = $ARGV[0]; open my $handle, "<", $file or die "$0: $file: $!\n"; while (<$handle>) { print $c++, " " x 5, $_; } close($handle);' <FILE>
2009-12-09 16:07:14
User: sputnick
Functions: perl

This is a joke for @putnamhill and @glaudiston

I'm pretty sure we can write longer if we want ;)

Know a better way?

If you can do better, submit your command here.

What others think

Or with grep glaudiston :

grep -n . <file>
Comment by sputnick 311 weeks and 4 days ago

sputnick, your syntax is a half of my in cost.


time { grep ".*" infile.csv > tmp ; }

real 0m0.731s

user 0m0.428s

sys 0m0.028s

time { grep -n . infile.csv > tmp ; }

real 0m0.304s

user 0m0.072s

sys 0m0.024s

Comment by glaudiston 311 weeks and 4 days ago

glaudiston, try that

fgrep -n . <file>

It's faster ;)

Comment by sputnick 311 weeks and 4 days ago

sputnick, did not worked for me:

fgrep -n . infile.txt cat infile.txt







Comment by glaudiston 311 weeks and 4 days ago

Which OS/Distro do you use ?

I'm under Archlinux

Comment by sputnick 311 weeks and 4 days ago
uname -a

Linux ubuntu 2.6.28-16-generic #55-Ubuntu SMP Tue Oct 20 19:48:24 UTC 2009 i686 GNU/Linux

grep --version

GNU grep 2.5.3

Comment by glaudiston 311 weeks and 4 days ago
grep --version

GNU grep 2.5.4

Comment by sputnick 311 weeks and 4 days ago

Your point of view

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