Download PDF Sams Teach Yourself Perl in 21 Days (2nd Edition)

Download PDF Sams Teach Yourself Perl in 21 Days (2nd Edition)

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Sams Teach Yourself Perl in 21 Days (2nd Edition)

Download PDF Sams Teach Yourself Perl in 21 Days (2nd Edition)

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From the Back Cover

Sams Teach Yourself Perl in 21 Days covers the basics of Perl in the first few chapters, and then moves on to practical issues of Perl and in-depth discussions of more advanced topics. Later chapters also delve into software engineering topics, with discussions of modular code and object-oriented programming. CGI is covered in one chapter, but it is not the focus on the book. The book relies heavily on longer working examples and code, as opposed to small snippets and code fragments, and each chapter includes two to three smaller complete examples and one major one that illustrates most of the concepts for that chapter and builds on the chapters before it. Written by Laura Lemay, this is her third major book after Sams Teach Yourself Web Publishing with HTML in 21 Days and Sams Teach Yourself Java in 21 Days.

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About the Author

Laura Lemay is a member of the gregarious, brightly colored species of computer-book author known as tutorialis prolificus. Although she has been spotted writing in the wild for numerous years, more public sightings have occurred frequently since 1995, including several versions of Sams Teach Yourself HTML, Sams Teach Yourself Java in 21 Days, and The Official Marimba Guide to Castanet. When not writing books, her primary habitat is in Northern California. Should you encounter her in person, do not make any sudden movements. Further field notes may be found at http://www.lne.com/lemay/. Rafe Colburn is a programmer and author working in North Carolina. His previous books include Sams Teach Yourself CGI in 24 Hours and Special Edition Using SQL. He also has a Web site at http://rc3.org that he updates often, and can be reached at rafe@rc3.org.

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Product details

Paperback: 704 pages

Publisher: Sams Publishing; 2 edition (June 10, 2002)

Language: English

ISBN-10: 0672320355

ISBN-13: 978-0672320354

Product Dimensions:

7.4 x 1.6 x 9 inches

Shipping Weight: 2.6 pounds (View shipping rates and policies)

Average Customer Review:

3.9 out of 5 stars

31 customer reviews

Amazon Best Sellers Rank:

#1,904,025 in Books (See Top 100 in Books)

I bought this book after trying to learn Perl through another book (Perl for Bioinformatics). This book is definitely a better introduction to Perl than any other book I've seen. It is clear and concise enough and although it might be hard to finish it in 21 days, you can start coding your own scripts much before the end of the book. I am still on chapter 11 and I can program most of what I need with it (i.e parsers and simple bioinformatics applications). I recognize that there are a few typos on the book but if even Knuth's Art of Computer Programming have them why shouldn't Lemay's Teach Yourself Perl in 21 Days do the same?Given what I said above, I must warn begginer programmers (like me) that Perl is not the best language for you to learn as your first one. It is a dirty scripting language which does the job and is most suitable for parsing files and formatting data but it has a lot of things which make it quite confusing initially (its context dependency for instance). If you want to learn something that will give a solid programming base you should start with something else (i.e. Java, Pascal, Ruby etc) which will probably be a little bit harder but will payoff later.

It's an ok book. I was hoping for it to be twice like an original Perl book I have that has come apart.

The bad:1. It has many typos and mistakes. Mistakes in a "teach yourself" book are particularly unacceptable.2. The explanations are very tedious to read and not very good. If you have never programmed then these tedious explanations may be of some help to you, although better quality explanations of the language are available elsewhere. But if you're an experienced programmer looking to learn Perl then reading an explanation of how a while loop works over and over again will, to say the least, not be your cup of Java. This is especially strange since, as it said in the book, this book is written for readers with at least some programming experience. Furthermore, many of the explanations are so vague that they're practically useless. For instance, instead of giving an explanation about the local scope of a foreach loop variable, the author says "if it [the iterating variable in the foreach loop] doesn't exist prior to the loop, it'll stop existing after the loop. If it does exist prior to the loop, the foreach will just use it as a temporary variable, and then restore its original value when you're done looping. You can think of the foreach variable as a sort of scratch variable used solely to store elements, which is then thrown away when the loop's done." And I consider this to be a representative example of most of the explanations in this book.3. This book is a bad reference. Many people buy programming books so that they can quickly read a few pages and learn some detail about some language feature. For this, the book is useless. There are many features that do NOT have a full explanation, only a partial one, and even these are often times strewn around the book so that you'll have to search for them. And personally, I can not use this book as a reference since I have doubts about the correctness of many of its explanations.4. The author will MANY times give a vague description of a feature and then tell you to look at the Perl documentation for more details. This makes the book useless for a beginner (since they're just learning the language) and useless for someone who already knows the language and is using it as a reference (since then they may as well have just gone to the Perl documentation from the outset).5. The example programs are not that well written. The quality of the example programs reminds me of something that I would have written when I had just a few years of programming experience.6. The book tells you many times about what you're going to learn about later in the book, which gets annoying.7. The author includes useless programming examples for some reason. Ex: "For example, here's a somewhat pointless for loop that creates an array, and then destroys it, backwards, printing the number of remaining (sic) and the array itself as it goes: [shows the code] I can't image what sort of Perl program would need this kind of loop, and because it iterates over a list it would probably make more sense as a foreach."8. Mistakes such as not knowing when to use "that" or "which" are unacceptable for any author.The good:1. If you're a beginner and if you can stand reading through all of it then you will learn something about the Perl language and you will learn how to create a quick script (although as a word of caution, if you emulate this book's examples then your scripts likely won't be very good).This programming book is among the worst that I have seen.Overall, I wish that I had bought another book.

I have always had this book. This is my go to book for any perl references. One of the best books to start learning perl.

Good description of Perl.

This isn't bad. I think it moves kinda fast, but that may just be me. This is seriously the only presentation of the subject matter that I'd consider reading to completion. This is a good introduction to Perl and a good reference for the future.

I love the structure of this book. This is a great Perl book than anything other book that I've been exposed to.

A basic, but well written book. I have only gotten to the 3rd chapter but satisfied with this purchase. I also use the net for additional information.

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Sams Teach Yourself Perl in 21 Days (2nd Edition) PDF

Sams Teach Yourself Perl in 21 Days (2nd Edition) PDF