Xah Regular Expression Articles Index

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1. Pattern Matching vs Grammar Specification

1. Emacs Lisp vs Perl: Validate Local File Links
2. Regex Limits, or, Should You Read Mastering Regular Expressions?

1. JavaScript: String Methods for Regex
2. JavaScript: RegExp Object
3. JavaScript: Regex Syntax

1. Python: Regex Basics
2. Python: Find/Replace by Regex
3. Python Regex Reference
4. Python Regex Functions
5. Python Regex Object and Methods
6. Python Regex Flags
7. Python Regex Match Object
8. Python Regex Syntax

1. Perl: Regex Tutorial

1. Emacs: Text Pattern Matching (regex) tutorial
2. Emacs Lisp: Regex Tutorial
3. Emacs Lisp: How to Find/Replace Text
4. Emacs Lisp: Unicode Representation in String
5. Emacs: Unicode Tutorial

1. Problems of Symbol Congestion in Computer Languages; ASCII Jam vs Unicode
2. Computer Language Design: String Syntax
3. ASCII ␀ ␣ ¶
4. Unicode in Function Names and Operator Symbol
5. On Meta Syntax, Formal Language, and Logic
6. Lisp, Python, Perl, Ruby Code to Validate Matching Brackets

Formal Language, Grammar, Parser

Formal Language, Grammar, Parser