RxJS forkJoin会按顺序返回结果吗？

Question

RxJS provides a function called forkJoin . It allows you to input multiple Observables and wait for all of them to finish. I am wondering if the resulting array will contain the results in the same order as the order of the input observables. If it wil not, which one of the operators does maintain the same order? I've been looking into the docs and was not able to find the answer.

Answer 1

It will return results in the same order. As is described in these official docs .

Good to mention that it will emit only latest values of the streams:

var source = Rx.Observable.forkJoin(
  Rx.Observable.of(1,2,3),
  Rx.Observable.of(4)
);

source.subscribe(x => console.log("Result", x));

// LOG: Result [3,4]