After writing about 20 R packages, I found I had accumulated several utility functions that I used across different packages, so I decided to extract them into a separate package. Previously I had been using the evil triple-colon ::: to access these internal utility functions. Now with xfun, these functions have been exported, and more importantly, documented. It should be better to use them under the sun instead of in the dark.
This page shows examples of a subset of functions in this package. For a full list of functions, see the help page …