Perl 6 and Parrot Essentials, Second Edition
Allison Randal, Dan Sugalski, Loepoid Toetsch · O'Reilly Media, Inc. eBooks · 2004
This book is an unparalleled sneak-peek of what's coming in the widely-anticipated Perl 6. It uncovers groundbreaking new developments in Parrot--the interpreter engine that will execute code written in the new Perl 6 language and the most revolutionary change in the language itself--Apocalypse 12 on objects. It also includes expanded coverage of Apocalypse 5 (regular expressions) and Apocalypse 6 (subroutines).