How do I create an observable of an array from an array of observables?

Question

I have an array of Thing objects that I want to convert to ConvertedThing objects, using an asynchronous function that returns Observable<

Answer 1

You can use .merge() to combine the array of observables into a single observable, and then use .toArray() to get them as a list in a single event.

For RxSwift 3+ use:

let arrayOfObservables: [Observable] = ...
let singleObservable: Observable = Observable.from(arrayOfObservables).merge()
let wholeSequence: Observable<[E]> = singleObservable.toArray()

For previous versions:

let arrayOfObservables: [Observable] = ...
let singleObservable: Observable = arrayOfObservables.toObservable().merge()
let wholeSequence: Observable<[E]> = singleObservable.toArray()