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 |