Match fixed characters, not regular expression.
Switch location of matches to location of non-matches.
Join multiple strings into a single string.
Count the number of matches in a string.
Detect the presence or absence of a pattern in a string.
Duplicate and concatenate strings within a character vector.
Extract first piece of a string that matches a pattern.
Extract all pieces of a string that match a pattern.
Locate the position of the first occurence of a pattern in a string.
Locate the position of all occurences of a pattern in a string.
Extract first matched group from a string.
Extract all matched groups from a string.
Replace first occurrence of a matched pattern in a string.
Replace all occurrences of a matched pattern in a string.
Split up a string into a variable number of pieces.
Split up a string into a fixed number of pieces.
Extract substrings from a character vector.
Replace substrings in a character vector. 'str_sub<-' will recycle all arguments to be the same length as the longest argument.
Trim whitespace from start and end of string.
Wrap strings into nicely formatted paragraphs.