The tidyverse is a miniature ecosystem within R which has certain coding conventions and tooling to make certain data analysis easier and prettier.
Most lucid explanation of everything is Hadley Wickham’s Advanced R book which is free and only“Advanced” in the sense that your knowledge of R will be advanced after reading it, not in the sense of being forbiddingly complicated for beginners.
A FP package for R in the spirit of underscore.js.
(You may or may not consider that statement snark.)
Useful functions: semi_join etc.