in reply to regex search valid only if registers n and n+1 are equal?
UPDATE: Another 3 ways:
Prints:#!/usr/bin/perl use strict; use warnings; while (<DATA>) { # 1 # my @arr = split; # print if $arr[1] != $arr[3]; # 2 print if sub { $_[1] != $_[3] }->(split); } # 3 # while (@_ = <DATA> =~ /(\w+)\s+/g) {print "@_\n" if $_[1] != $_[3]} __DATA__ foo 1000 bar 1000 foo 1000 bar 500
foo 1000 bar 500
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Seekers of Perl Wisdom