Regular Expressions¶
| Type | Syntax |
|---|---|
| Positive lookahead | q(?=u) |
| Negative lookahead | q(?!u) |
| Positive lookbehind | (?<=a)b |
| Negative lookbehind | (?<!a)b |
| empty lines | ^(?:[\t ]*(?:\r?\n |
| lines don't contain text | ^((?!TEXT).)*$\n |
| trailing spaces | [ \t]+$ |
| Type | Syntax |
|---|---|
| Positive lookahead | q(?=u) |
| Negative lookahead | q(?!u) |
| Positive lookbehind | (?<=a)b |
| Negative lookbehind | (?<!a)b |
| empty lines | ^(?:[\t ]*(?:\r?\n |
| lines don't contain text | ^((?!TEXT).)*$\n |
| trailing spaces | [ \t]+$ |