There are some things that I wish were easier with the stringr or stringi
packages. The foremost of these is the extraction of numbers from strings.
stringr makes you figure out the regex for yourself; strex takes care of
this for you. There are many more useful functionalities in strex. In
particular, there's a match_arg() function which is more flexible than the
base match.arg(). Contributions to this package are encouraged: it is
intended as a miscellany of string manipulation functions which cannot be
found in stringi or stringr.
Rory Nolan and Sergi Padilla-Parra (2017). filesstrings: An R package for file and string manipulation. The Journal of Open Source Software, 2(14). doi:10.21105/joss.00260 .
Useful links: