Description Usage Arguments Format Value Note References See Also Examples
START
matches the start of a string.
END
matches the end of a string.
exactly
makes the regular expression match the whole string, from
start to end.
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x |
A character vector. |
An object of class regex
(inherits from character
) of length 1.
A character vector representing part or all of a regular expression.
Caret and dollar are used as start/end delimiters, since \A
and
\Z
are not supported by R's internal PRCE engine or stringi
's
ICU engine.
http://www.regular-expressions.info/anchors.html and http://www.rexegg.com/regex-anchors.html
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