Perl 6 Cool Perl 6 #22

Let's break it down

for %addrbook.classify({ .value.substr(0,1).uc }).sort -> $g {
    say "{$g.key}:";
    .say for $g.value».invert».fmt("  %-32s %s");
}
Copyright © 2010
http://www.pmichaud.com/2010/pres/