Product Description

Regular expressions are an extremely powerful tool for manipulating text and data. They are now standard features in a wide range of languages and popular tools, including Perl, Python, Ruby, Java, VB.NET and C# (and any language using the .NET Framework), PHP, and MySQL.

If you don't use regular expressions yet, you will discover in this book a whole new world of mastery over your data. If you already use them, you'll appreciate this book's unprecedented detail and breadth of coverage. If you think you know all you need to know about regular expressions, this book is a stunning eye-opener.

As this book shows, a command of regular expressions is an invaluable skill. Regular expressions allow you to code complex and subtle text processing that you never imagined could be automated. Regular expressions can save you time and aggravation. They can be used to craft elegant solutions to a wide range of problems. Once you've mastered regular expressions, they'll become an invaluable part of your toolkit. You will wonder how you ever got by without them.

Yet despite their wide availability, flexibility, and unparalleled power, regular expressions are frequently underutilized. Yet what is power in the hands of an expert can be fraught with peril for the unwary. Mastering Regular Expressions will help you navigate the minefield to becoming an expert and help you optimize your use of regular expressions.

Mastering Regular Expressions, Third Edition, now includes a full chapter devoted to PHP and its powerful and expressive suite of regular expression functions, in addition to enhanced PHP coverage in the central "core" chapters. Furthermore, this edition has been updated throughout to reflect advances in other languages, including expanded in-depth coverage of Sun's java.util.regex package, which has emerged as the standard Java regex implementation.Topics include:

• A comparison of features among different versions of many languages and tools
• How the regular expression engine works
• Optimization (major savings available here!)
• Matching just what you want, but not what you don't want
• Sections and chapters on individual languages

Written in the lucid, entertaining tone that makes a complex, dry topic become crystal-clear to programmers, and sprinkled with solutions to complex real-world problems, Mastering Regular Expressions, Third Edition offers a wealth information that you can put to immediate use.

Reviews of this new edition and the second edition:

"There isn't a better (or more useful) book available on regular expressions."
--Zak Greant, Managing Director, eZ Systems

"A real tour-de-force of a book which not only covers the mechanics of regexes in extraordinary detail but also talks about efficiency and the use of regexes in Perl, Java, and .NET...If you use regular expressions as part of your professional work (even if you already have a good book on whatever language you're programming in) I would strongly recommend this book to you."
--Dr. Chris Brown, Linux Format

"The author does an outstanding job leading the reader from regex novice to master. The book is extremely easy to read and chock full of useful and relevant examples...Regular expressions are valuable tools that every developer should have in their toolbox. Mastering Regular Expressions is the definitive guide to the subject, and an outstanding resource that belongs on every programmer's bookshelf. Ten out of Ten Horseshoes."
--Jason Menard, Java Ranch

Product Details

• Amazon Sales Rank: #161016 in Books
• Published on: 2006-08-08
• Original language: English
• Number of items: 1
• Binding: Paperback
• 515 pages

Amazon.co.uk Review
Regular expressions--it sounds fairly ordinary in a regular sort of way, so therefore it must be very simple and very straightforward, right? Not quite.

The simple name hides an incredible amount of power when handling textual data with scripting languages such as Perl, Python and awk and more and the programmer that can master regular expressions can master just about anything.

From the off it's necessary to congratulate author Jeffrey Friedl on doing a superb job of asking what can be a very complex subject and breaking it down into digestible chunks that almost anyone can understand.

From the basics of character and pattern matching through to the recognition of complex string patterns and multiple character replacements to "greedy" metacharacters and how to curb their appetite, this is about as comprehensive as it gets.

With a handful of latter chapters devoted to the differences between scripting languages and the way in which they deal with regular expressions and so many examples it'll make your eyes water there's something here for everyone.

So, if you can examine a string like this "(\\.|[^"\\])*" and know what it does and how it does it there's plenty of reference material in here for those odd moments when you need a refresher. If, however, you've no idea what the above means, and you need the ability to handle textual data, buy this book. Now!

Review
"Indispensable for text processing wizards and regex newcomers alike." - Paul Hudson, Linux Format, February 2007 "In addition to the sheer volume of information, one thing that sets this book apart is that the author uses "real-world" rather than contrived examples. A few of the examples were situations that I have yet to come across, but many were either "been there, done that" or things that I had to go out and try." - James Mohr, Linux Magazine, April 2007

Major Keary, Book News, 2002 No 5
As the only reference to the art, it should be on the bookshelf of every programmer and anyone who works with large text files.

Customer Reviews

Escellent coverage of a surprisingly complex topic
I bought this book so as to answer a couple of simple questions about regular expressions. I then found it surprisingly readable, and read it for pleasure.

Once I had read it, I found that I was able to apply what I had learned in a variety of powerful ways. I had known that regexes are an important part of Perl. But now I find that they are supported by, and remarkably useful in, Javascript.

The subject matter is difficult, largely because different regex engines work in subtly different ways - this is all clearly covered.

Above all, Friedl avoids the irritating patronising style of so many authors of computer books.

A Masterpiece of Fine Details
I bought, read and thoroughly enjoyed the first edition of this book, and was actually surprised to find the second edition a few years later, since I thought Jeffrey Friedl must have already said all there was to say about the subject, so complete was edition 1. However, I soon found a lot of useful new information in edition 2 (e.g. look-behind), beautifully explained as ever. Both editions are well-written IMO, although I wouldn't call them "easy reads". They are not really for dipping into, but for settling down with, although I can only usually manage a couple of chapters at a time, but I always come back. They are "satisfying reads", and somewhat addictive; I think they appeal to the nit-picker in me. For dipping into, perhaps the "Regular Expression Pocket Reference" (by a different author) will be better - I haven't read it yet. But if you actually want to understand REs (and they occur widely in the UNIX/Linux world that I inhabit :-) ), this book is a must.

As a bonus, it is also a rather good introduction to Perl (5.8 in the 2nd edition), but of course, REs are not confined to Perl, as the author makes clear.

My only criticism is actually of the paper quality of the 2nd edition, which is odd, since the 1st edition's paper was recycled and acid-free, which this is apparently not, but it looks cheap and nasty. I think Jeffrey Friedl deserves better.

Great Book
This is one of the best books I have read in a long time. It goes far behind simply using regExps but into efficiency and alternate strategies. Covers implementation in many languages (java, perl, .net) yet is still quite easy to understand.

The author says the aim of the book is to get you to "think in regular expressions", this is a great approach and I now find myself using regular expressions to do just about everything involving text.

Well recommended if you really want to understand and use regular expressions