Introduction 1 Chapter 1 Introducing Regular Expressions 3 Understanding the Need 3 How Regular Expressions Are Used 4 RegEx Searches 4 RegEx Replaces 5 So What Exactly Is a Regular Expression? 5 Using Regular Expressions 6 Before You Get Started 7 Summary 7 Chapter 2 Matching Single Characters 9 Matching Literal Text 9 How Many Matches? 10 Handling Case Sensitivity 10 Matching Any Characters 11 Matching Special Characters 14 Summary 16 Chapter 3 Matching Sets of Characters 17 Matching One of Several Characters 17 Using Character Set Ranges 20 "Anything But" Matching 23 Summary 24 Chapter 4 Using Metacharacters 25 Escaping Revisited 25 Matching Whitespace Characters 28 Matching Specific Character Types 29 Matching Digits (and Nondigits) 29 Matching Alphanumeric Characters (and Nonalphanumeric Characters) 31 Matching Whitespace (and Nonwhitespace) 32 Specifying Hexadecimal or Octal Values 32 Using POSIX Character Classes 33 Summary 35 Chapter 5 Repeating Matches 37 How Many Matches? 37 Matching One or More Characters 38 Matching Zero or More Characters 40 Matching Zero or One Characters 42 Using Intervals 44 Exact Interval Matching 44 Range Interval Matching 45 "At Least" Interval Matching 46 Preventing Over Matching 48 Summary 49 Chapter 6 Position Matching 51 Using Boundaries 51 Using Word Boundaries 52 Defining String Boundaries 54 Using Multiline Mode 57 Summary 58 Chapter 7 Using Subexpressions 59 Understanding Subexpressions 59 Grouping with Subexpressions 60 Nesting Subexpressions 63 Summary 66 Chapter 8 Using Backreferences 67 Understanding Backreferences 67 Matching with Backreferences 70 Performing Replace Operations 73 Converting Case 75 Summary 76 Chapter 9 Looking Ahead and Behind 77 Introducing Lookaround 77 Looking Ahead 78 Looking Behind 80 Combining Lookahead and Lookbehind 82 Negating Lookaround 83 Summary 85 Chapter 10 Embedding Conditions 87 Why Embed Conditions? 87 Using Conditions 88 Backreference Conditions 88 Lookaround Conditions 90 Summary 92 Chapter 11 Regular Expression Solutions to Common Problems 93 North American Phone Numbers 93 U.S. ZIP Codes 95 Canadian Postal Codes 95 United Kingdom Postcodes 96 U.S. Social Security Numbers 97 IP Addresses 98 URLs 98 Complete URLs 99 Email Addresses 100 HTML Comments 101 JavaScript Comments 102 Credit Card Numbers 103 Summary 107 Appendix A Regular Expressions in Popular Applications and Languages 109 grep 109 Java 110 JavaScript 111 Microsoft .NET 111 Microsoft SQL Server T-SQL 112 Microsoft Visual Studio .NET 112 MySQL 113 Oracle PL/SQL 114 Perl 114 PHP 115 Python 116 9780134757063 TOC 4/5/2018.