Angular 6 pipe RxJs operator to chain 3 dependant observables

Question

I have 3 dependent Rest API resources (lets say observables) like this:

1st observable produces one item as array of users, like this:

getUsers(): Ob         


        

Answer 1

Here are the operators for combination, these emit the result in an array (reference):

• combineAll
• combineLatest
• forkJoin
• pairwise
• zip (the solution I would suggest)

I would suggest giving them all a read, to work out what you would prefer and find best for your scenario.

Hope this helps!