Regular Expression Terms

Pattern
Matcher
Metacharacters

Regex types :
 -  Simple
 -  Negation
 -  Ranges
 -  Union
 -  Intersections
 -  Subtraction

Escaped Constructs
Quantifiers
Zero Length Matches
Greedy, Reluctant, Possessive Quantifiers

Capturing groups
Backreference
Boundary Matchers

Index Methods
Study Methods
Replacement Methods