RxSwift: Deep Inside FlatMap

A guide to understanding one of the most powerful (and confusing) operators for Combine and RxSwift

Published in

Better Programming

15 min readJan 25, 2021

For each value received, our closure { } will translate that value into an Observable that will return two values of its own. — Illustration via ReactiveX docs

One of the most powerful operations in the ReactiveX arsenal is FlatMap. And yet for many people, it’s also one of the hardest operators to get your head around.

RxSwift: Deep Inside FlatMap

A guide to understanding one of the most powerful (and confusing) operators for Combine and RxSwift

Written by Michael Long