Perl is a versatile, powerful programming language used in a variety of disciplines, ranging from system administration to web programming to database manipulation. One slogan of Perl is that it makes easy things easy and hard things possible. “Intermediate Perl” is about making the leap from the easy things to the hard ones.Originally released in 2003 as “Learning Perl Objects, References, and Modules” and revised and updated for Perl 5.8, this book offers a gentle but thorough introduction to intermediate programming in Perl. Written by the authors of the best-selling “Learning Perl,” it picks up where that book left off. Topics include: 

• Packages and namespaces
• References and scoping
• Manipulating complex data structures
• Object-oriented programming
• Writing and using modules
• Testing Perl code
• Contributing to CPAN

Following the successful format of “Learning Perl,” we designed each chapter in the book to be small enough to be read in just an hour or two, ending with a series of exercises to help you practice what you’ve learned. To use the book, you just need to be familiar with the material in “Learning Perl” and have ambition to go further.

Perl is a different language to different people. It is a quick scripting tool for some, and a fully-featured object-oriented language for others. It is used for everything from performing quick global replacements on text files, to crunching huge, complex sets of scientific data that take weeks to process. Perl is what you make of it. But regardless of what you use Perl for, this book helps you do it more effectively, efficiently, and elegantly.

“Intermediate Perl” is about learning to use Perl as aprogramming language, and not just a scripting language. This is the book that turns the Perl dabbler into the Perl programmer.

About the Author

Randal L. Schwartz is a renowned expert on the Perl programming language. In addition to writing “Learning Perl” and the first two editions of “Programming Perl”, he has been the Perl columnist for UNIX Review, Web Techniques, Sys Admin, and Linux Magazine. He has contributed to a dozen Perl books, and over 200 magazine articles. Randal runs a Perl training and consulting company (Stonehenge Consulting Services), and is highly sought-after as a speaker for his combination of technical skill, comedic timing, and crowd rapport. He’s also a pretty good Karaoke singer.

brian d foy has been an instructor for Stonehenge Consulting Services since 1998. He founded the first Perl user group, the New York Perl Mongers, as well as the Perl advocacy nonprofit Perl Mongers, Inc., which helped form more than 200 Perl user groups across the globe. He maintains the perlfaq portions of the core Perl documentation, several modules on CPAN, and some stand-alone scripts. He’s the publisher of The Perl Review and is a frequent speaker at conferences. His writings on Perl appear on The O’Reilly Network and use.perl.org, and in The Perl Journal, Dr. Dobbs Journal, and The Perl Review.

Tom Phoenix has been working in the field of education since 1982. After more than thirteen years of dissections, explosions, work with interesting animals, and high-voltage sparks during his work at a science museum, he started teaching Perl classes for Stonehenge Consulting Services, where he’s worked since 1996. Since then, he has traveled to many interesting locations, so you might see him soon at a Perl Mongers’ meeting. When he has time, he answers questions on Usenet’s comp.lang.perl.misc and comp.lang.perl.moderated newsgroups, and contributes to the development and usefulness of Perl. Besides his work with Perl, Perl hackers, and related topics, Tom spends his time on amateur cryptography and speaking Esperanto. His home is in Portland, Oregon.