Vectorised over string and pattern.
Equivalent to grepl(pattern, x).
See str_which() for an equivalent to grep(pattern, x).
str_detect(string, pattern, negate = FALSE)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").
If TRUE, return non-matching elements.
A logical vector.
stringi::stri_detect() which this function wraps,
str_subset() for a convenient wrapper around
x[str_detect(x, pattern)]
# NOT RUN {
fruit <- c("apple", "banana", "pear", "pinapple")
str_detect(fruit, "a")
str_detect(fruit, "^a")
str_detect(fruit, "a$")
str_detect(fruit, "b")
str_detect(fruit, "[aeiou]")
# Also vectorised over pattern
str_detect("aecfg", letters)
# Returns TRUE if the pattern do NOT match
str_detect(fruit, "^p", negate = TRUE)
# }
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