Ebook Learning Perl, Fourth Edition
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Learning Perl, Fourth Edition
Ebook Learning Perl, Fourth Edition
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Book Description
Making Easy Things Easy and Hard Things Possible
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About the Author
Randal Schwartz is one of the bestselling authors of all time, having been fortunate enough to coauthor two of the seminal books on learning Perl. In addition to writing Programming Perl and Learning Perl, Randal has been the Perl columnist for UNIX Review, Web Techniques, Sys Admin, and Linux Magazine.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.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.
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Product details
Paperback: 312 pages
Publisher: O'Reilly Media; Fourth edition (July 24, 2005)
Language: English
ISBN-10: 0596101058
ISBN-13: 978-0596101053
Product Dimensions:
7 x 0.8 x 9.2 inches
Shipping Weight: 1.2 pounds (View shipping rates and policies)
Average Customer Review:
4.0 out of 5 stars
44 customer reviews
Amazon Best Sellers Rank:
#1,481,855 in Books (See Top 100 in Books)
I first tried to learn Perl by using the other O'Reilly book, "Programming Perl". I was completely lost. Then I found this book and my second attempt was much more successful. This book is great for self-teaching, and the book chapters should be read in order as each chapter builds on previous ones. Each chapter has plenty of good programming exercises with answers in the back of the book. I review this book in the context of the table of contents.Chapter 1. IntroductionThis chapter answers basic questions such as how to get and install Perl, how to construct a basic Perl program, and then takes you on a whirlwind tour of Perl.Chapter 2. Scalar DataAs a general rule, when Perl has just one of something, that's a scalar, which is the topic of this chapter.Chapter 3. Lists and ArraysIf a scalar is the "singular" in Perl, as described at the beginning of Chapter 2, the "plural" in Perl is represented by lists and arrays. A list is an ordered collection of scalars. An array is a variable that contains a list. In Perl, the two terms are often used as if they're interchangeable. But, to be accurate, the list is the data, and the array is the variable. You learn about these differences through practical code examples in this chapter.Chapter 4. SubroutinesYou've now seen and used some of the built-in system functions, such as chomp, reverse, and print. But, as other languages do, Perl has the ability to make subroutines. The name of a subroutine is another Perl identifier occasionally with an optional ampersand in front. There's a rule about when you can omit the ampersand and when you cannot, and that rule is discussed.Chapter 5. Input and OutputThis chapter covers the 80% of the I/O you'll need for most programs. If you're familiar with the workings of standard input, output, and error streams, you're ahead of the game. If not, you get you caught up by the end of this chapter.Chapter 6. HashesIn this chapter, you will see a feature that makes Perl one of the world's great programming languages--hashes. Though hashes are a powerful and useful feature, you may have used other powerful languages for years without ever hearing of hashes. But you'll use hashes in nearly every Perl program you'll write from now on; they're that important.A hash is a data structure like an array, in that it can hold any number of values and retrieve these values at will. However, instead of indexing the values by number, as in arrays, you look up the values by name. That is, the indices aren't numbers but are arbitrary unique strings.Chapter 7. In the World of Regular ExpressionsPerl has many features that set it apart from other languages. Of all those features, one of the most important is its strong support for regular expressions. These allow fast, flexible, and reliable string handling. But that power comes at a price. Regular expressions are tiny programs in their own special language, built inside Perl. This means that you're about to learn another programming language, although, fortunately, it's a simple one. In this chapter, you'll visit the world of regular expressions, where, for the most part, you can forget about the world of Perl.Chapter 8. Matching with Regular ExpressionsIn the previous chapter, you visited the world of regular expressions. Now you'll see how that world fits into the world of Perl.Chapter 9. Processing Text with Regular ExpressionsYou can use regular expressions to change text, too. So far, the book has only shown you how to match a pattern. Now, you'll learn how to use patterns to locate the parts of strings that you want to change.Chapter 10. More Control StructuresIn this chapter, you'll see some alternative ways to write Perl code. For the most part, these techniques don't make the language more powerful, but they make it easier or more convenient to get the job done. You don't have to use these techniques in your own code, but don't skip this chapter. You're certain to see these control structures in other people's code, sooner or later.Chapter 11. File TestsEarlier, this book showed how to open a filehandle for output. Normally, that will create a new file, wiping out any existing file with the same name. Perhaps you want to check that there isn't a file by that name. Perhaps you need to know how old a given file is, or perhaps you want to go through a list of files to find which ones are larger than a certain number of bytes and not accessed for a certain amount of time. Perl has a complete set of tests you can use to find information about files, and that is the topic of this chapter.Chapter 12. Directory OperationsThe files created in the previous chapter were generally in the same place as your program. But modern operating systems let you organize files into directories, allowing you to keep your MP3 files away from your important work files so you don't accidentally send an MP3 file to your boss. In this chapter you'll see how Perl lets you manipulate these directories directly, in ways that are even fairly portable from one operating system to another.Chapter 13. Strings and SortingPerl is designed to be good at solving programming problems that are about 90% working with text and 10% everything else. So it's no surprise that Perl has strong text-processing abilities, including all that can be done with regular expressions. But sometimes the regular expression engine is too fancy, and you need a simpler way of working with a string, as you'll see in this chapter.Chapter 14. Process ManagementOne of the best parts of being a programmer is launching someone else's code so you don't have to write it yourself. This chapter shows how to manage your child processes by launching other programs directly from Perl. The examples in this chapter are primarily Unix-based; if you have a non-Unix system, expect to see some differences.Chapter 15. Perl ModulesThere is a lot more to Perl than what is in this book, and there are a lot of people doing a lot of interesting things with Perl. If there is a problem to solve, then somebody has probably already solved it and made their solution available on the Comprehensive Perl Archive Network (CPAN), which is a worldwide collection of servers and mirrors containing thousands of modules of reusable Perl code. If you want to learn how to write modules, consult the "Alpaca book". In this chapter, you learn how to use modules that already exist.Chapter 16. Some Advanced Perl TechniquesThe techniques in this chapter are only "advanced" in the sense that they aren't necessary for beginners. The first time you read this book, you may want to either skip or skim this chapter so you can get right to using Perl. Then come back to it later when you're ready to get more out of Perl.Appendix A - Exercise AnswersAppendix B - Beyond the Llama
First of all, this book is only the beginning. It does teach the basics including arrays, scalars, functions and many other topics that are central to a basic understanding of Perl. It also covers regular expressions which aside from the great swatch of modules is one of Perl's greatest strengths.Because of that and the teaching style this book earns the 5 star rating.Toward the end it hints at some of the other 'required' topics such as references, modules and objects. After you've read this book get a copy of Intermediate Perl to read up on those topics.
I purchased this book hoping to gain insight into Perl after having experience with C, C++ and Java. I came back with not only a wonderful, base knowledge of the principals of Perl, but came out with some other skills as well.This books provides a wonderful, quick, easy read for beginners and pros alike. The knowledge of the language coupled with the coverage of core concepts, methodology, practices and practical programmatic thinking was a delight to read/review.
Great book and well written.... Even for the SE, such as myself this helps bring back some things that I have forgotten or needed a refresh on.
I have experience programing, but some of the other Perl beginner books try toput too much in a book for beginres in Perl. This book covers all the basics for someone new to the language
I have programmed in Python and a little bit in C and I think this book is great - and so is perl. I already knew a little bit about perl from reading a Wikipedia article and looking at the perldoc documentation, but Learning Perl taught my some very useful things that I would have never found alone (splicing, nongreedy regexes, just to name a few). perl has amazing support for I/O, and the book helped me understand regexes and file I/O. I found both perl and this book to be good for other things, too. I wrote a logging program that wrote logs with timestamps, for example. Other things I used this book and perl for included a calculator, a text-to-HTML conversion program, and a password cracker. Learning Perl helped me uncover some bugs in my programs, taught me many new things, and was also just a fun read. The only thing I would add would be more about OOP (Object Oriented Programming). I found the TOC (Table of Contents) to be very well done and the e-book version had links to the proper sections. I could find anything quite quickly with the excellent TOC.
How can you program Perl without this book? After years I still use it from time to time when I have a brain fade regarding some common syntax issue.
I had a physical copy of this book that I loaned to a coworker and her dogs got it and destroyed it. This book is an excellent resource not only for learning Perl, but also for using as a quick reference down the road.
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