my @sorted = sort { my @a = $a =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)/; my @b = $b =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)/; $a[0] <=> $b[0] || $a[1] <=> $b[1] || $a[2] <=> $b[2] || $a[3] <=> $b[3] } @unsorted;