case                    Convert case of a string.
invert_match            Switch location of matches to location of
                        non-matches.
modifiers               Control matching behaviour with modifier
                        functions.
str_c                   Join multiple strings into a single string.
str_conv                Specify the encoding of a string.
str_count               Count the number of matches in a string.
str_detect              Detect the presence or absence of a pattern in
                        a string.
str_dup                 Duplicate and concatenate strings within a
                        character vector.
str_extract             Extract matching patterns from a string.
str_interp              String interpolation.
str_length              The length of a string.
str_locate              Locate the position of patterns in a string.
str_match               Extract matched groups from a string.
str_order               Order or sort a character vector.
str_pad                 Pad a string.
str_replace             Replace matched patterns in a string.
str_replace_na          Turn NA into "NA"
str_split               Split up a string into pieces.
str_sub                 Extract and replace substrings from a character
                        vector.
str_subset              Keep strings matching a pattern.
str_trim                Trim whitespace from start and end of string.
str_trunc               Truncate a character string.
str_view                View HTML rendering of regular expression
                        match.
str_wrap                Wrap strings into nicely formatted paragraphs.
stringr-data            Sample character vectors for practicing string
                        manipulations.
word                    Extract words from a sentence.