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| 19 | <tr> |
19 | <tr> |
| 20 | <td valign="top" width="100%"> |
20 | <td valign="top" width="100%"> |
| 21 | 21 | ||
| 22 | <p> |
22 | <p> |
| 23 | A regular expression is a character sequence that is an abbreviated |
23 | A regular expression is a character sequence that is an abbreviated |
| 24 | definition of a set of strings. A string is said to match a regular |
24 | definition of a set of strings. A string matches a regular |
| 25 | expression if it is a member of the set described by the regular expression. |
25 | expression if it is a member of the set described by the regular expression. |
| 26 | </p> |
26 | </p> |
| 27 | <p> |
27 | <p> |
| 28 | A regular expression is allowed to match anywhere within a string, |
28 | A regular expression is allowed to match anywhere within a string, |
| 29 | unless the regular expression is explicitly anchored to the beginning |
29 | unless the regular expression is explicitly anchored to the beginning (operator <code>^</code>) |
| 30 | or end of the string (by using operators <code>^</code> and/or <code>$</code>). |
30 | or end (operator <code>$</code>) of the string. |
| 31 | </p> |
31 | </p> |
| 32 | 32 | ||
| 33 | </td> |
33 | </td> |
| 34 | 34 | ||
| 35 | 35 | ||