Regular expression quick start guide
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Ka-Lok Yeung (Talk | contribs) (Created page with '<table border="1" cellpadding="2"> <tr><th align="left" width="300">Regular Expression Pattern</th><th align="left">Explanations</th></tr> <tr><td>^</td><td>Matches beginning of …') |
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<tr><td>^</td><td>Matches beginning of a line</td></tr> | <tr><td>^</td><td>Matches beginning of a line</td></tr> | ||
<tr><td>$</td><td>Matches the end of a line</td></tr> | <tr><td>$</td><td>Matches the end of a line</td></tr> | ||
Revision as of 00:12, 3 September 2009
| Regular Expression Pattern | Explanations |
|---|---|
| ^ | Matches beginning of a line |
| $ | Matches the end of a line |
| [characters] | Matches any single character between the brackets |
| re1|re2 | Match either re1 or re2 |
| re* | Matches zero or more occurrences of re |
| re+ | Matches one or more occurrences of re |
| re? | Matches zero or one occurrences of re |
| Re{m,n} | Matches at least “m” and at most “n” occurrences of re |
| (...) | Parentheses are used to group regular expressions |
| \0, \1, \2, ... | Substitute the value matched by the nth grouped sub-expression, used in remapped fields. |
