Daya Bay Reactor Neutrino Experiment
TWiki > RegularExpression (5 vs. 6)
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 <<O>>  Difference Topic RegularExpression (6 - 2005-03-27 - TWikiContributor)
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Regular Expressions

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  The backreference \n, where n is a single digit, matches the substring previously matched by the nth parenthesized subexpression of the regular expression.
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>		 Related Topics: UserDocumentationCategory

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