Xah Regular Expression Articles Index

• JS: RegExp Tutorial
• Python: Regex Reference
• Emacs: Regular Expression

• Wolfram: Regular Expression

• Golang: Regular Expression

• Perl: Regex Tutorial

• PowerShell Regular Expression Ref

Misc Essays

• Jargon Automata in Finite State Automata
• Problems of Symbol Congestion in Computer Languages; ASCII Jam vs Unicode
• Programing Language Design: String Syntax
• ASCII Characters
• Programing Language: Unicode Math Symbols in Function Name and Operator
• On Meta Syntax, Formal Language, and Logic
• Code Fun: Validate Matching Brackets
• Pattern Matching vs Grammar Specification
• Elisp vs Perl: Validate File Links
• Regex Limits, or, Should You Read Mastering Regular Expressions?

Compiler Notes

• Compiler Notes