Preface This workbook is an additional set of exercises to supplement those already in Learning Perl, Sixth Edition. The chapter and page references apply only to that edition. Addi- tionally, unless I denote otherwise, Learning Perl without qualification means the sixth edition. That book already contains some exercises, and I try to cover the topics those exercises didn't. I've been teaching Perl since 1998, and my beginner classes use Learning Perl as the course text. Along the way, I've posed a lot of additional problems to students so they could test their understanding of the topics I covered and some of the additional in- formation I added in the lecture. In doing this, I pose two sorts of problems: one of simple knowledge where knowing the right fact or trick makes the problem easy, and the other somewhat clever where a Perl implementation of a particular technique solves