This book will not teach you Perl, but it contains a recipe for many possible problems that you will have to solve while coding in Perl. It is a MUST HAVE for any Perl programmer.

With twenty-two chapters spanning a variety of topics, the Perl Cookbook is enough to satiate any Perl programmer. Although not my top recommendation for a beginner, the book does an excellent job of teaching the basics for those who need it. For a more seasoned programmer this book does not disappoint; the topics covered in later chapters are sure to pique your interest. More importantly, however, it ensures that whatever your task may be, it is done with equal weight placed on both speed and practicality.

The book begins by discussing the various ways to manipulate strings, numbers, arrays and hashes. It conveys various examples of many common tasks that serve as a strong base for future Perl programs. The book then shifts attention to the all-powerful regular expressions, providing numerous commonly used (and often forgotten) examples, not to mention the all-encompassing Regular Expression Grab Bag, a three-page spread of expressions that often sit on the tip of your tongue. From here the book begins to pick up pace and diagram proper programming etiquette and design for subroutines, packages, libraries, modules, classes and objects.

My favorite part of the book comes near the end in the form of sockets and client/server communication. The book quickly gave me the answers I needed on how to establish a proper client and server as well as several options and explanations along the way. Instead of simply telling me what I needed to do, the book gave me several options and explained the pros and cons of each (a common theme I enjoyed throughout the book).

In short, this book allowed me to learn the ins and outs of Perl at my own pace, making this a wonderful cookbook for any Perl chef.

Much like breaking a huge mirror then taking a picture,... each of the
falling pieces shows a different angle and this book gives you lots of
programing ideas to work with using different ways to do it for
many of the Examples,... if your a program inventor , and if your stuck on how to do something you should get this book!! then you can spend less time searching the internet for answers and more time being productive.

This book will show you how to use perl in many ways that you may not have realized, or have had no idea how to do. this book also gives
Discussions on why the code works the way it does. and then shows another way to do it.

"The book can be used as a reference but I find my self reading it like a novel"

If you are beginner to expert, this helps with simple methods that are tried and true. I find it most helpful in giving me ideas of how to address problems far beyond the scope of the book. Sometimes just simple reminders of cookbook methods stimulates thoughts in orthogonal directions that yield the best solutions to customer problems.

Your first book on PERL should be "Learning PERL", now in its second edition. It takes you through the basics of PERL in a crystal clear fashion with lots of explanations, exercises, and examples. This should be your second book after you've learned to speak basic PERL. When you want to know the most efficient way to approach specific problems, no other book beats it. A concurrent purchase should be Programming PERL. That book is the definitive book on the language, but you could no more learn to program in PERL from that book than you could learn to speak English by using a dictionary as your textbook.

Spread over five chapters, the first portion of this book addresses Perl's basic data types. Chapter 1 covers matters like accessing substrings, expanding function calls in strings, and parsing comma-separated data. It also covers Unicode strings. Chapter 2 tackles oddities of floating-point representation, placing commas in numbers, and pseudo-random numbers. Chapter 3 demonstrates conversions between numeric and string date formats and using timers. Chapter 4 covers everything relating to list and array manipulation, including finding unique elements in a list, efficiently sorting lists, and randomizing them. Chapter 5 concludes the section on basics with a demonstration of the most useful data type, the associative array. The chapter shows how to access a hash in insertion order, how to sort a hash by value, how to have multiple values per key, and how to have an immutable hash.

Chapter 6, includes recipes for converting a shell wildcard into a pattern, matching letters or words, matching multiple lines, avoiding greediness, matching nested or recursive patterns, and matching strings that are close to but not exactly what you're looking for. Although this chapter is one of the longest in the book, it could easily have been longer still since every chapter contains uses of regular expressions. It's part of what makes Perl the language that it is.

The next three chapters cover the filesystem. Chapter 7 shows recipes pertaining to opening files, locking them for concurrent access, modifying them in place, and storing filehandles in variables. Chapter 8 discusses storing filehandles in variables, managing temporary files, watching the end of a growing file, reading a particular line from a file, handling alternative character encodings like Unicode and Microsoft character sets, and random access binary I/O. Finally, in Chapter 9 there are techniques to copy, move, or delete a file, manipulate a file's timestamps, and recursively process all files in a directory.

Chapter 10 through Chapter 13 focus on making your program flexible and powerful. Chapter 10 includes recipes on creating persistent local variables, passing parameters by reference, calling functions indirectly, crafting a switch statement, and handling exceptions. Chapter 11 is about data structures. Here basic manipulation of references to data and functions are demonstrated. Later recipes show how to create elaborate data structures and how to save and restore these structures from permanent storage. Chapter 12, concerns breaking up your program into separate files. The chapter discusses how to make variables and functions private to a module, customize warnings for modules, replace built-ins, trap errors loading missing modules, and use the h2ph and h2xs tools to interact with C and C++ code. Lastly, Chapter 13, covers the fundamentals of building your own object-based module to create user-defined types, complete with constructors, destructors, and inheritance. Other recipes show examples of circular data structures, operator overloading, and tied data types.

The next two chapters are about interfaces: one to databases and the other to users. Chapter 14 includes techniques for manipulating DBM files and querying and updating databases with SQL and the DBI module. Chapter 15 covers topics such as clearing the screen, processing command-line switches, single-character input, moving the cursor using termcap and curses, thumbnailing images, and graphing data.

The last portion of the book is devoted to interacting with other programs and services. Chapter 16 is about running other programs and collecting their output, handling zombie processes, named pipes, signal management, and sharing variables between running programs. Chapter 17 shows how to establish stream connections or use datagrams to create low-level networking applications for client-server programming. Chapter 18 is about higher-level protocols such as mail, FTP, Usenet news, XML-RPC, and SOAP. Chapter 19, contains recipes for processing web forms, trapping their errors, avoiding shell escapes for security, managing cookies, shopping cart techniques, and saving forms to files or pipes. Chapter 20, covers non-interactive uses of the Web, such as fetching web pages, automating form submissions in a script, extracting URLs from a web page, removing HTML tags, finding fresh or stale links, and parsing HTML. Chapter 21 introduces mod_perl, the Perl interpreter embedded in Apache. It covers fetching form parameters, issuing redirections, customizing Apache's logging, handling authentication, and advanced templating with Mason and the Template Toolkit. Finally, Chapter 22 is about ubiquitous data format XML and includes recipes such as validating XML, parsing XML into events and trees, and transforming XML into other formats.