[scns]

There is a book about it [0], you can download it here [1]. It uses SML to teach FP. I did the exercises on the train in Termux and Vim.

[0] https://www.semanticscholar.org/paper/Functional-C-Hartel-Mu...

[1] https://ris.utwente.nl/ws/portalfiles/portal/5128727/book.pd...

(edit) add download link and background.