正則表達式英文版，大家可以看看。
Preface
1:Introductionc to Regular Expressions
Solving Real Problems
Regular Expressions as a Language
The Filename Analogy
The Language Analogy
The Regular-Expression Frame of Mind
If You Have Some Regular-Expression Experience
Searching Text Files:Egrep
Egrep Metacharacters
Start and End of the Line
Character Classes
Matching Any Character with Dot
Alternation
Ignoring Differences in Capitalization
Word Boundaries
In a Nutshell
Optional Items
Other Quantifiers:Repetition
Parentheses and Backreferences
The Great Escape
Expanding the Foundation
Linguistic Diversification
The Goal of a Regular Expression
A Few More Examples
Regular Expression Nomenclature
Improving on the Status Quo
Summary
Personal Glimpses
3:Extended Introductory Examples
About the Examples
A Short Introductioncto Perl
Matching Text with Regular Expressions
Toward a More Real-World Example
SidecEffects of a Successful Match
Intertwined Regular Expressions
Intermission
Modifying Text with Regular Expressions
Example: FormcLetter
Example:Prettifying a Stock Price
Automated Editing
A Small Mail Utility
Adding Commas to a Number with Lookaround
Text-to-HTML Conversion
That Doubled-Word Thing
3:Overview of Regular Expression Features and Flavors
A Casual Stroll Across the Regex Land scape
The Origins of Regular Expressions
At a Glance
Care and Handling of Regular Expressions
Integrated Handling
Procedural and Object-Oriented Handling
A Search-and-Replace Example
Search and Replace in Other Languages
Care and Handling:Summary
Strings,Character Encodings,and Modes
Strings as Regular Expressions
Character-Encoding Issues
Regex Modes and Match Modes
Common Metacharacters and Features
Character Representations
……
4:The Mechanics of Expression Processing
5:Practical Regex Techniques
6:Crafting an Efficient Expression
7:Perl
8:Java
9:.NET