Anchors 17 | bracket 4 | Case 1 | Character Class 11 |
Digit 13 | Escape 7 | Frequency 5 | Greedy 10 |
grep 9 | Group 1 | Index 7 | Loop 5 |
Metacharacters 9 | metasymbols 4 | modifier 18 | parentheses 3 |
Pattern matching 30 | split 9 | substitution 20 | tr 8 |
translation 4 |