Fun Fun Function
3 HN recommenders · recommended in 4 months, 2016–2021
11:25 · 128K views · Feb 29, 2016
An episode of FunFunFunction explaining monads in JavaScript as functors that also implement flatMap. It builds on the preceding functor episode and works through code examples.
Recommended to people confused by monads as a friendly, practical explanation for JavaScript developers, with one commenter saying it finally made it click.
4 comments from Hacker News
I read this example years ago, and it didn't clear anything up for me. After half a year of trying to understand monads, I saw a video by MPJ/Funfunfunction [0] and it finally made sense. [0] this video
I like how mpj explains it. Monad - FunFunFunction #21 this video Furthermore, the creator of Elm has a fun explanation too. Evan Czaplicki - Let's be mainstream! User focused design in Elm - Curry On [LINK] More serious computer scientist explains monads in the following. Erik Meijer: Functional Programming [LINK] and here too [LINK]
Here's a half baked explanation, as in just the flatmap part. map is understood in javascript. So you 'just' need to make the leap to flatmap. Which is mapping something and flattening the result. So still you need to learn is what flatten is. But that's not too hard to learn. Try the funfunfunction video [0] [0]: this video
A nomad is something that goes "nom!" ;) A monad is basically an function, in the algebra sense, that will take a set of input, and map it to a different output. That's the most simple definition I can give without getting into the math, and it's been a minute since I've really gotten into Group theory. Maybe through a Haskell tutorial for some hands-on guidance? [LINK] this video