It feels like anything is mowed down on the internet. I’ve been a dev for a long time too, and I never feel sure when I chose a stack for a new toy project (in my day job I rarely get to chose, so that’s a non issue there)
If you use JavaScript, you’ve probably seen a monad, since Promise is a monad. Unit is Promise.resolve()
, bind is Promise.then()
. As required, Promise.resolve(x).then(y) === y(x)
(unit forms a left identity of bind), y.then(Promise.resolve) === y
(unit forms a right identity of bind), and x.the (y.the (z)) === x.the (y).the (z)
(bind is essentially associative).
You even have the equivalent of Haskell’s fancy do-notation (a form of syntactic sugar to save writing unit and bind all over the place) in the form of async/await. It’s just not generalized the way it is in Haskell.