UPDATE. Check out my new advanced functional library: https://github.com/dmitriz/cpsfy
Heavily annotated examples from the awesome videos Professor Frisby Introduces Composable Functional JavaScript, see also the discussion on Reddit and on Hacker News.
See also the wonderful e-book Professor Frisby's Mostly Adequate Guide to Functional Programming by the same author (See also https://github.com/MostlyAdequate/mostly-adequate-guide for the updates).
Both course and book amazingly manage to avoid suffering from the two widespread diseases when explaining abstract functional concepts:
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The first disease is to stay with abstract artifically simplified examples that can be easily manipulated directly without the theory, thus failing to illustrate the very benefits of the theory and abstraction. The reader not familiar with real world uses of that abstraction is therefore struggling to appreciate its usefulness.
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The second disease is to bring complete nontrivial real world examples relying on all technical details involved, including those not relevant to the point of the explanation. The reader not familiar with those technical details can feel distracted if not confused.
Professor Frisby masterfully manages to navigate the reader through convincing real world examples demonstrating real benefits of the functional abstractions with sharp focus and no distraction by unnecessary details.
Install the packages with either of
yarn install
npm installthen enter the examples directory and run the files directly with node
node <file.js>