This OReilly Cookbook provides more than a hundred recipes to help programmers use regular expressions to manipulate text and crunch data. Every programmer needs a grasp of regular expressions, but their power doesnt come without problems--even seasoned users often have trouble tackling performance issues. With recipes for popular programming languages such as C#, Java, JavaScript, Perl, PHP, Python, Ruby, and VB.NET, this book offers step-by-step solutions to scores of common tasks involving regular expressions. This cookbook will help you: Understand the basics of regular expressions through a concise tutorial

Use regular expressions effectively in several programming and scripting languages
Learn how to validate and format input
Manage words, lines, special characters, and numerical values
Find solutions for using regular expressions in URLs, paths, markup, and data exchange
Learn the nuances of more advanced regex features
Understand how regular expression APIs differ from language to language
Write better regular expressions for custom needs

Whether youre a novice or an experienced user, Regular Expressions Cookbook will help deepen your understanding of this tool. Youll learn powerful new tricks, avoid language-specific gotchas, and save valuable time with this huge library of proven solutions to difficult, real-world problems.