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fox creekcity in alberta canada
fox creek
最后更新： 2011-10-23
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the syntax and semantics of the regular expressions sup- ported by pcre are described below. regular expressions are also described in the perl documentation and in a number of other books, some of which have copious examples. jeffrey friedl's "mastering regular expressions", published by o'reilly (isbn 1-56592-257-3), covers them in great detail. the description here is intended as reference documentation. a regular expression is a pattern that is matched against a subject string from left to right. most characters stand for themselves in a pattern, and match the corresponding charac- ters in the subject. as a trivial example, the pattern the quick brown fox matches a portion of a subject string that is identical to itself.
the \a, \z, and \z assertions differ from the traditional circumflex and dollar (described below) in that they only ever match at the very start and end of the subject string, whatever options are set.
最后更新： 2011-10-24
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