Joining multiple requests into one. Array of observables into an observable of an array

Question

I am doing multiple requests for every section that I have in my collectionView.

The idea was to join them together into an Observable<[FeedSection]> so that I can bind it to the collectionView sections.

Right now I am having an array of observables and I don't know how to transform it. Ideas?

So i'm looking into smth like this: [Observable<FeedSection>] -> Observable<[FeedSection]>

Code:

let feedObservable = [flickrProvider.rx.request(.kittens),
                      flickrProvider.rx.request(.dogs),
                      flickrProvider.rx.request(.publicFeed)].map { 
                          $0.map(Feed.self).asObservable()
}

Please refactor the title. I've barely processed it :) – Mikhail Kholodkov Jun 18 '18 at 14:49 — Mikhail Kholodkov, Jun 18 '18 at 14:49
@MikhailKholodkov that's the best I came up with :D – denis631 Jun 18 '18 at 14:49 — denis631, Jun 18 '18 at 14:49

score 1 · Accepted Answer · answered Jun 18 '18 at 16:07

You can do :

let feedObservable = [flickrProvider.rx.request(.kittens),
                      flickrProvider.rx.request(.dogs),
                      flickrProvider.rx.request(.publicFeed)]
let zipped = Observable.zip(feedObservable).map { kittens, dogs, public in 
    return [kittens, dogs, public]
}

Joining multiple requests into one. Array of observables into an observable of an array

1 Answers1