I should have had
this.historyComponent.historyTimespanChanged$
.subscribe
On Saturday, October 7, 2017 at 2:52:26 PM UTC-7, Reza Razavipour wrote:
>
> One of my angular component needs to allow subscriptions to a number that
> it holds. I am trying to turn this number into an observable so others can
> subscribe to it.
>
> my publisher looks like
>
> private countChanged = new BehaviorSubject<any>(null);
> public historyTimespanChanged$ = this.countChanged.asObservable();
>
> private publish() {
> this.countChanged.next(this.count);
> }
>
> expandTimeSpan() {
> this.count ++;
> this.publish();
> }
>
> reset() {
> this.count = 0;
> this.publish();
> }
>
> getHistoricalCount() {
> return Observable.of(this.count);
> }
>
> my observer looks like
>
> this.historyComponent.getHistoricalCount()
> .subscribe(count => {
> if (count !== 0 ) {
> console.log('new history timespan expanded: ', count);
> this.historyCount = count;
> this.retrieveHistoricalData();
> }
> });
>
> but the subscriber never gets called.
> Can anyone see what I am doing wrong?
>
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