Regular expressions are an extremely powerful tool for manipulating text and data.They have spread like wildfire in recent years, now offered as standard features inPerl, Java, VB.NET and C# (and any language using the .NET Framework), PHP, Python,Ruby, Tcl, MySQL, awk, Emacs, and many other popular tools and languages. Ifyou don't use regular expressions yet, you will discover in this book a whole newworld of mastery over your data. If you already use them, you'll appreciate thisbook's unprecedented detail and breadth of coverage. If you think you know all youneed to know about regular expressions, this book is a stunning eye-opener. In spitetheir wide availability, flexibility, and unparalleled power, regular expressions arefrequently underutilized. Regular expressions allow you to code complex and subtletext processing that you never imagined could be automated. Regular expressions cansave you time and aggravation. They can be used to craft elegant solutions to a widerange of problems. A command of regular expressions is an invaluable skill. Yet whatis power in the hands of an expert can be fraught with peril for the unwary.
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Copyright; Dedication; Preface; The Need for This Book; Intended Audience; How to Read This Book; Organization; Typographical Conventions; Exercises; Links, Code, Errata, and Contacts; Personal Comments and Acknowledgments; Chapter 1: Introduction to Regular Expressions; 1.1 Solving Real Problems; 1.2 Regular Expressions as a Language; 1.3 The Regular-Expression Frame of Mind; 1.4 Egrep Metacharacters; 1.5 Expanding the Foundation; 1.6 Personal Glimpses; 1.7 Quiz Answer; Chapter 2: Extended Introductory Examples; 2.1 About the Examples; 2.2 Matching Text with Regular Expressions; 2.3 Modifying Text with Regular Expressions; 2.4 Quiz Answers; Chapter 3: Overview of Regular Expression Features and Flavors; 3.1 A Casual Stroll Across the Regex Landscape; 3.2 Care and Handling of Regular Expressions; 3.3 Strings, Character Encodings, and Modes; 3.4 Common Metacharacters and Features; 3.5 Guide to the Advanced Chapters; Chapter 4: The Mechanics of Expression Processing; 4.1 Start Your Engines!; 4.2 Match Basics; 4.3 Regex-Directed Versus Text-Directed; 4.4 Backtracking; 4.5 More About Greediness and Backtracking; 4.6 NFA, DFA, and POSIX; 4.7 Summary; 4.8 Quiz Answers; Chapter 5: Practical Regex Techniques; 5.1 Regex Balancing Act; 5.2 A Few Short Examples; 5.3 HTML-Related Examples; 5.4 Extended Examples; Chapter 6: Crafting an Efficient Expression; 6.1 A Sobering Example; 6.2 A Global View of Backtracking; 6.3 Benchmarking; 6.4 Common Optimizations; 6.5 Techniques for Faster Expressions; 6.6 Unrolling the Loop; 6.7 The Freeflowing Regex; 6.8 In Summary: Think!; 6.9 Quize Answers; Chapter 7: Perl; 7.1 Regular Expressions as a Language Component; 7.2 Perl's Regex Flavor; 7.3 Regex-Related Perlisms; 7.4 The qr/···/ Operator and Regex Objects; 7.5 The Match Operator; 7.6 The Substitution Operator; 7.7 The Split Operator; 7.8 Fun with Perl Enhancements; 7.9 Perl Efficiency Issues; 7.10 Final Comments; Chapter 8: Java; 8.1 Judging a Regex Package; 8.2 Object Models; 8.3 Packages, Packages, Packages; 8.4 Sun's Regex Package; 8.5 A Quick Look at Jakarta-ORO; Chapter 9: .NET; 9.1 .NET's Regex Flavor; 9.2 Using .NET Regular Expressions; 9.3 Core Object Details; 9.4 Static "Convenience" Functions; 9.5 Support Functions; 9.6 Advanced .NET; About the Author; Colophon;
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