Rx.Observable.prototype.sample(interval | sampleObservable), Rx.Observable.prototype.throttleLatest(interval | sampleObservable)Samples the observable sequence at each interval.
[interval] (Number): Interval at which to sample (specified as an integer denoting milliseconds)[sampleObservable] (Observable): Sampler Observable.[scheduler=Rx.Scheduler.timeout] (Scheduler): Scheduler to run the sampling timer on. If not specified, the timeout scheduler is used.(Observable): Sampled observable sequence.