Back references
| Pattern | Matches |
|---|---|
(to) (be) or not \1 \2 |
Match to be or not to be |
([^\s])\1{2} |
Match non-space, then same twice more  aaa, … |
\b(\w+)\s+\1\b |
Match doubled words |
Comments
| Pattern | Matches |
|---|---|
(to) (be) or not \1 \2 |
Match to be or not to be |
([^\s])\1{2} |
Match non-space, then same twice more  aaa, … |
\b(\w+)\s+\1\b |
Match doubled words |