Can I safely replace .takeUntil(Observable.timer(0)) with .take(1)?

Question

I was doing some code cleanup for my ngrx project at work and found some RXJS code that was not following our usual practices. I was wondering if it was safe to replace it with code that does match our usual practices.

This is the code that does not match our normal practices:

stream$.takeUntil(Observable.timer(0)).subscribe();

I want to know if the code above is equivalent to the following code:

stream$.take(1).subscribe();

From the timer documentation and the take documentation that I've read, these two lines of code appear to be equivalent. Is that the correct conclusion?

Answer 1

I want to know if the code above is equivalent to the following code:

No, it is not:

const stream$ = Observable.of(1, 2, 3);

Will give

stream$.takeUntil(Observable.timer(0)) // 1, 2, 3
stream$.take(1)                        // 1