in reply to Adding 2 + 2

This one appears to suffer from an off-by-one bug...

use Modern::Perl;
use List::Util qw(first);
use LWP::Simple qw(get);

say for
    first  {/^2\+2/}
    split m{\r?\n|\r},
    get   q{http://gutenberg.net.au/ebooks01/0100021.txt}

[download]

(And monks outside of the Australian branch of the monastery need to be aware of potential copyright issues.)

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In Section Cool Uses for Perl