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Re:Ask HN: How did you learn functional programming? by faical on Monday July 13, 2020 @05:49AM (#23818980)
I learned functional programming many years ago, by reading the book COMMON LISP: A Gentle Introduction to Symbolic Computation by David S. Touretzky [1]. Incredible book, super beginner friendly; the chapter on Recursion in particular is one of my favourites. :)

[1] https://www.cs.cmu.edu/~dst/LispBook/book.pdf

Re:Ask HN: How did you learn functional programming? by deepaksurti on Monday July 13, 2020 @06:33AM (#23819225)
+10 for the chapter on recursion. It is not only a must read but probably the only thing one needs to read to understand Recursion.

I suspect Christopher Nolan read the chapter on recursion before writing Inception :-)