str_detect(string, pattern) will detect a matched pattern specified by the user. The output will be a list of logical values with TRUE indicating the presence of a match and FALSE indicating no match within the string.
str_which(string, pattern)
str_which(string, pattern) will return a list of indexes with matched patterns specified by the user.
str_count(string, pattern)
str_count(string, pattern) will return the number of matches within a string based on a pattern specified by the user.
str_locate(string, pattern)
str_locate(string, pattern) will return the start and end positions of a matched pattern within a string.
