and when you scroll you get the new values that you append

that single access can be done with a lock, a serial queue, an Observable…

each screen has it's own event loop like in the Elm architecture. Events are fed into the update function which computes the new state and the state is then passed to the view's render function. It's not possible to change the state outside of that cycle so it can't happen that the state is somehow modified at two places at the same time. The question is how to deal with subcomponents/views/widgets/whatever that are stateful too and need access to the parent's state (maybe modify it even). In essence, the service and the list activity are subviews of the app and need to read&write to the list of posts in the app's state. https://hackernoon.com/the-importance-of-state-ownership-in-elm-72f711ceb244

Elm architecture works well per-screen like a website does. It’s harder to do for multi-screens and bg services because it was never designed with the Android lifecycle in mind.

you just cannot start and run activities inside a state monad or reducer function

so you’re stuck with global state (or state one level above yours) that you modify the best that you can

in the example I gave you a while ago it used Rx’ BehaviorSubjects for this: https://github.com/pakoito/FunctionalAndroidReference

if you squint they’re also reducers and they persist across configuration changes and new screens

because only the UI wiring is lifecycle-bound

To me, #3 in that list is not at the same level as #1 and #2. And I feel the trend is actually going the opposite way

Arguably, those are also the principles of OOP…

And software maintainability in general.

Anyone used http://www.functionalkotlin.com/ ?

it's made by some friends @jchannon

it's a good intro, definitely

yeah i came across it yesteday @pakoito but I saw one video and was wondering whether it was new or they gave up

new

cool

they're translating from Spanish

is that intro video narrated by Hadi?

or someone who sounds like him? 🙂

hahahaha probably another spaniard, JM or Leiva

Will give the first video a go then. thanks for the help @pakoito

Hey @jchannon, I’m one of those spaniards working in FunctionalHub 🙂

Ola!

🙂

🙂

that’s as good as my spanish gets, sorry