Description Usage Arguments Format Value References See Also Examples
BOUNDARY
matches a word boundary.
whole_word
wraps a regex in word boundary tokens to match a whole
word.
1 2 3 4 5 |
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.
http://www.regular-expressions.info/wordboundaries.html and http://www.rexegg.com/regex-boundaries.html
1 2 3 4 5 6 7 8 9 10 11 | BOUNDARY
NOT_BOUNDARY
# Usage
x <- c("the catfish miaowed", "the tomcat miaowed", "the cat miaowed")
(rx_before <- BOUNDARY %R% "cat")
(rx_after <- "cat" %R% BOUNDARY)
(rx_whole_word <- whole_word("cat"))
stringi::stri_detect_regex(x, rx_before)
stringi::stri_detect_regex(x, rx_after)
stringi::stri_detect_regex(x, rx_whole_word)
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