Regular Expressions

  1. Grouping and Capturing
    1. Basic Grouping
      1. Parentheses Syntax
        1. Subpattern Organization
          1. Precedence Control
            1. Nested Groups
            2. Capturing Groups
              1. Automatic Numbering
                1. Group References
                  1. Capture Storage
                    1. Group Hierarchy
                    2. Non-Capturing Groups
                      1. Syntax and Purpose
                        1. Performance Benefits
                          1. Readability Improvements
                            1. When to Use
                            2. Named Groups
                              1. Named Capture Syntax
                                1. Reference by Name
                                  1. Language Variations
                                    1. Advantages over Numbered Groups
                                    2. Backreferences
                                      1. Numbered Backreferences
                                        1. Named Backreferences
                                          1. Self-Referencing Patterns
                                            1. Replacement Context Usage

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                                          4. Quantifiers and Repetition

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                                          6. Advanced Pattern Constructs