1) perl -nle '$result .= " $_"; END{print $result}' data.txt
2) perl -e "chomp(@lines=<>); print join ' ', @lines" data.txt
As for this:
Went with the following to do what i wanted :
perl -e 'undef $/; $text=<>; $text =~ tr/\n//; 1 while $text =~ s/\b(
+\w+\d+\s*\d+\.\d+\.\d+\.\d+)\s*\1\b/$1/ig; print $text; $/="\n"; list
basically deletes the duplicates entries one after the other with "slurping"
1) As graff already pointed out:
If you were expecting the $/="\n"; at the end of your one-liner to do something, that's your problem. That step doesn't do anything.
The values of perl's global variables are set to the defaults when a perl program starts up. So setting a global variable in the last line of a perl program does nothing. Once a program ends, all the values that were assigned to any global variables during the program are lost.
2) Your regex doesn't work: use strict;
use warnings;
use 5.010;
my $text = 'S55 1.1.1.1 S66 2.2.2.2 S55 1.1.1.1';
$text =~ s/\b(\w+\d+\s*\d+\.\d+\.\d+\.\d+)\s*\1\b/$1/ig;
say $text;
--output:--
S55 1.1.1.1 S66 2.2.2.2 S55 1.1.1.1
3) Why would you ever try to cram so much code into the command line when you can write a perl program in a text file that is easier to write, edit and maintain? In any case, see if this does what you want:
perl -nle '$results{$_}=undef; END{print join " ", keys %results}' dat
+a.txt
Note that the order of the ip addresses in the output will be random.
|