Regex Pages
01. Metacharacters / Grep
02. Classes / Grep
03. Negated Classes / Grep
04. Any Character / Grep
05. Alternation / Grep
06. Word Boundaries / Grep
07. Optional / Grep
08. Quantifiers / Grep
09. Backreference / Grep
10. Non Capturing / Perl
11. Shorthands / Perl
12. Substitution / Perl
13. Lookaround / Perl
14. Delimiters / Perl
15. Context / Perl
16. Mode Modifier / Perl
17. Atomic Grouping / Perl
18. Mechanics / Perl
