Regular Expressions
Literal Characters
The Dot Metacharacter
Whitespace Characters
Control Characters
Square Bracket Notation
Character Ranges
Negated Character Classes
Case Handling in Classes
Digit Classes
Word Character Classes
Whitespace Classes
Negated Predefined Classes
Unicode Categories
String Anchors
Line Anchors
Word Boundaries
String Boundaries
Position-Only Matching
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2. Fundamental Concepts
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4. Quantifiers and Repetition