Regular Expressions

  1. Regular Expression Engines
    1. Engine Categories
      1. DFA Engines
        1. NFA Engines
          1. Hybrid Engines
            1. Performance Characteristics
            2. Major Implementations
              1. POSIX Engines
                1. PCRE Engine
                  1. JavaScript Engine
                    1. Python re Module
                      1. Java Pattern Class
                        1. .NET Regex Class
                        2. Feature Compatibility
                          1. Syntax Variations
                            1. Supported Constructs
                              1. Performance Differences
                                1. Migration Considerations
                                2. Engine-Specific Optimizations
                                  1. Compilation Strategies
                                    1. Caching Mechanisms
                                      1. Memory Management
                                        1. Threading Considerations

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                                      7. Flags and Modifiers

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                                      9. Common Patterns and Applications