Seeking Guidance on Advancing Functional Programming Skills in R

Dear R Users,

I am looking for a roadmap to learn advanced functional programming in R.

I have already read *Functional Programming* by Thomas Mailund, and I have
been studying base R functions to understand how they are written and to
learn from their design. I have analyzed and rewritten dozens of base R
functions, and this process has been very instructive. However, I still
find it difficult to write more complex and robust functions on my own.

I would be very grateful for any advice you might have — whether in the
form of recommended books, learning strategies, advanced resources, or
suggestions for progressing toward more advanced functional programming
skills in R. Additionally, I was wondering if there are any official
workshops, teaching sessions, or training initiatives focused on advanced
functional programming within the R ecosystem.

Kind regards.

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