Refactor a Promise Chain to Function Composition using Ramda

See more RamdaJS video tutorials on egghead - vnslrs.io/ramda
Promise chains can be a powerful way to handle a series of transformations to the results of an async call. In some cases, additional promises are required along the way. In cases where there are no new promises, function composition can reduce the number of dot chained thens you need. In this lesson, we'll look at how to take a promise chain, and reduce it down with function composition.

[@wazazaby]

I've watched a lot of videos about Ramda, and now that I'm starting to understand the concepts I found this video very informative and it's great to finally see a real life example on how you would use Ramda to improve your code, thank you :)

[@s07a08i89]

Ramda is so sleek, I'm gonna start using it along with RxJS. Thanks for the video!

[@AndrewVanSlaars]

Ramda and RxJS go together really well! Enjoy!

[@tysoncadenhead]

This is a really good demonstration! I switched to using Ramda a few months ago and I still think it's awesome!

[@vishalaggarwal2454]

Short and to the point . I like this compact and to the point style of teaching...!!! THanks Andrew!!

[@MereddynYT]

use async/await to get rid of the thens ^^

[@joeldpalmer]

Great demo

[@kostas_x]

Can you please post the full URLs used in the examples? Thank you!

[@kettlebellsporttraining1507]

Really good example of some useful functional programming in Js, thank you! Anyway, when dealing with side effects (fetch, dom etc..) you should perhaps consider using monads which help in handling error cases, async operations and so on while still being compositional

[@AndrewVanSlaars]

Thanks! I agree, a Task would be more functional, but I also think there is a ton of value in introducing these concepts slowly. The second you say "monad" that turns some people off before they've had the opportunity to dip their toes in the FP water :). The power of simple compositions is a great way to get people interested and they can build up to more advanced concepts from there.

[@ryanolson7]

EPIC.

[@marccawood]

This style is great for the happy flow but what about error handling?

[@AndrewVanSlaars]

You can add a catch and if you want to handle errors within the compositions, Ramda has a tryCatch function that you can use - ramdajs.com/docs/#tryCatch

[@Virus00000000000001]

mind=blown