
Vectorised over string
and pattern
. If the match is of length
0, (e.g. from a special match like $
) end will be one character less
than start.
str_locate(string, pattern)str_locate_all(string, pattern)
Input vector. Either a character vector, or something coercible to one.
Pattern to look for.
The default interpretation is a regular expression, as described
in stringi::stringi-search-regex. Control options with
regex()
.
Match a fixed string (i.e. by comparing only bytes), using
fixed()
. This is fast, but approximate. Generally,
for matching human text, you'll want coll()
which
respects character matching rules for the specified locale.
Match character, word, line and sentence boundaries with
boundary()
. An empty pattern, "", is equivalent to
boundary("character")
.
For str_locate
, an integer matrix. First column gives start
postion of match, and second column gives end position. For
str_locate_all
a list of integer matrices.
str_extract()
for a convenient way of extracting matches,
stringi::stri_locate()
for the underlying implementation.
# NOT RUN {
fruit <- c("apple", "banana", "pear", "pineapple")
str_locate(fruit, "$")
str_locate(fruit, "a")
str_locate(fruit, "e")
str_locate(fruit, c("a", "b", "p", "p"))
str_locate_all(fruit, "a")
str_locate_all(fruit, "e")
str_locate_all(fruit, c("a", "b", "p", "p"))
# Find location of every character
str_locate_all(fruit, "")
# }
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