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I am having a problem on how to approach combining multiple http get requests in parallel and returning it as a flat, observable array.

Currently, I have a method, returnNewCars(), that returns Observable after making one http get request -- in the method returnAllCars(), I would like to make multiple http get requests and still return Observable.

Right now, returnNewCars() prints:

I'm currently building a type ahead search. I'm trying to adapt it from the example here https://www.learnrxjs.io/learn-rxjs/recipes/type-ahead but I need to make an http call on keystroke. I'm testing it against timezones from my api. It works, but it seems to be compounding api calls every time I input a keyup.

If I type 'us' it will return results and make two identical api calls. If I add 'a' to make 'usa' it will then make 3 api calls. If I backspace a letter it makes 4, so on and so forth.

From my understanding switchMap is supposed to cancel calls that are going as newer ones come in, but it doesn't seem to do that with my implementation. I cannot for the life of me figure out why it's doing this when I keep going over the example. I tried to use .share() to attempt to consolidate streams but it didn't seem to help.

Search service:

So the code below has been developed off the answer I got in this stack overflow question.

the code is designed to poll my server until either a condition on the server is true, or polling has occurred for a minute.

I understand I can stop the polling after a minute using the takeUntil RXJS function. However, I have no idea where in the code I would put it in. As every place I put it in that I thought it would go, the code has errored out.

I am also using this tutorial from the learnrxjs website https://www.learnrxjs.io/learn-rxjs/operators/filtering/takeuntil

You'll notice the first line of the startastream() function is

const endtimer = timer(60000);

This is the condition that would fill the takeUntil() argument. So takeUntil(endtimer)

I have couple of observables combined in one observable with combineLatest. Also I have one inner switchMap observable that in real example makes an http request to remote server.

Now I wonder, how can the combined observable continue working in case if switchMap returns error ?

I've created simplified example here

So my code is:

Just started learning RxJS. Really confused about the combineAll operator. Would really appreciate an explanation on this example code:

I have an object with an array of items in it something like this: { a: string, b: string, items: Something[] }. In my observable, when a new value is emitted, I want the previous values of items to be concatenated with new values so I used the scan operator. It does something like myObservable$.pipe(scan((acc: any, curr: any) => [...acc.items, ...curr.items])).

It is working as expected, but I have some pipe async like (myObservable$ | async)?.a so I want to keep my object as is and only concatenate my items inside this object, but the scan operator maps my object to the new array (I totally understand it is the normal behavior).

So how can I concatenate my arrays in my object without this mapping?

Example:

What I have:

I noticed that some of my tap(...) invokations won't log to console, so I investigated further and found that an inner piping seems to kill off the outer piping. For instance, the code below, will show inner but won't show outer.

I have a BehaviourSubject that is subscribed to via the getSaveBehaviorSubject() in the constructor of a Service.This behavioursubject can receive multiple types of data from other components/services of which some types need to be stored in the backend while others do not. When it receives a value that does need to be stored it sends it to the backend via a put/post request. As a request rate limiter I'm using the debounce(300) operator so that the actual request to the server is made after 300 ms of inactivity have passed. This will prevent the server from throwing a 429 Too many requests error. The debounce operator should only be applied when a value type is pushed that needs to be stored. I've tried creating such a condition with the iif() operator. My code looks like this: