LOL! I have NO IDEA what this does. :)
j
https://gist.github.com/1237698
use 5.14.1;
my $str = q {This is the best thing ever.};
my $re = qr{(.i.) .+? (.e.)};
$str =~ $re;
for (1 .. $#-) {
my $substr = substr $str, $-[ $_ ], $+[ $_ ] - $-[ $_ ];
printf "match %s (from %2s to %2s): %s\n", $_, $-[ $_ ], $+[ $_ ], $substr;
}