observable_join

Emits the latest values from both inputs once both complete.

This observable will only emit once both of its input observables have completed. After which it will emit a tuple of the last emissions from each input observable, then complete.

Meaning if even one of the observables haven’t emitted before all of them had completed, only a complete notification will be observed!

If not all observables complete, nothing will be emitted even if all input observables were primed.

See Also

• CombineChangesObservable - Emits the latest of two sources, tagging which side changed, even before both have emitted.
• CombineLatestObservable - Emits the latest of two sources whenever either emits, after both emitted at least once.
• ZipObservable - Emits paired tuples when both sources emit, matched by emission order.

Example

cargo run -p rx_core --example observable_join_example

let observable_1 = (1..=3).into_observable();
let observable_2 = (4..=6).into_observable();

let _subscription = join(observable_1, observable_2).subscribe(PrintObserver::new("join"));

Output:

join - next: (3, 6)
join - completed
join - unsubscribed