Many programmers would love to use Perl for projects that involve heavy lifting, but miss the many traditional algorithms that textbooks teach for other languages. Computer scientists have identified many techniques that a wide range of programs need, such as:
Fuzzy pattern matching for text (identify misspellings!) Finding correlations in data Game-playing algorithms Predicting phenomena such as Web traffic Polynomial and spline fitting
Using algorithms explained in this book, you too can carry out traditional programming tasks in a high-powered, efficient, easy-to-maintain manner with Perl.
This book assumes a basic understanding of Perl syntax and functions, but not necessarily any background in computer science. The authors explain in a readable fashion the reasons for using various classic programming techniques, the kind of applications that use them, and -- most important -- how to code these algorithms in Perl.
If you are an amateur programmer, this book will fill you in on the essential algorithms you need to solve problems like an expert. If you have already learned algorithms in other languages, you will be surprised at how much different (and often easier) it is to implement them in Perl. And yes, the book even has the obligatory fractal display program.
There have been dozens of books on programming algorithms, some of them excellent, but never before has there been one that uses Perl.
The authors include the editor of The Perl Journal and master librarian of CPAN; all are contributors to CPAN and have archived much of the code in this book there.
"This book was so exciting I lost sleep reading it." Tom Christiansen
Jon Orwant is president of Readable Publications, Inc. He founded The Perl Journal in 1995 and served as the sole editor, publisher, accountant, designer, and postal antagonizer until 1999. He has been on the technical committee of all of O'Reilly's Perl conferences (where he is the emcee of the Internet Quiz Show), and he speaks frequently about Perl, most recently at the first YAPC on Rebuilding Post-Apocalyptic Civilization with Perl. He is currently an MIT Media Laboratory IBM Fellow, creating programs that create programs that play games. His other research interests are user modeling and electronic publishing. He gives frequent talks about Media Lab research, most recently on the promise and perils of Internet gambling. In 1993, he created the world's first Internet stock-picking game. His Markov-model based Rock-Paper-Scissors program has been undefeated since 1997. He also performs professional voice-overs. A court injunction from the Commonwealth of Massachusetts prohibits him from cooking or otherwise assisting in the preparation of any foodstuff meant for human consumption. Jarkko Hietaniemi is the creator and Master Librarian of CPAN: Comprehensive Perl Archive Network. He has also been known to frequent Perl developer forums. Luckily enough, getting his MSc in CS in the field of parallel computing didn't interfere overly much with his Perl and UNIX hacking. During those savored moments of off-line time, he fancies gobbling up speculative fiction and popular science. His real life employer is Nokia Research Center. John Macdonald has been using Perl commercially since 1988 for a suite of Unix system administration tools. His background with Unix dates back to the days when Unix was written in PDP-11 assembler and later includes representing the University of Waterloo at the first UNIX Users Meeting at City University of New York in the mid-1970s while finishing his M. Math degree. (In those days before the creation of Usenix, the people at the meeting would sit together around a single table.) In addition, his background includes work on compilers, kernel internals, device drivers and the like. He has also been observed partaking in recreational computing activities.
