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/** PURE_IMPORTS_START .._scheduler_async,.._operators_sampleTime PURE_IMPORTS_END */ import { async } from '../scheduler/async'; import { sampleTime as higherOrder } from '../operators/sampleTime'; /** * Emits the most recently emitted value from the source Observable within * periodic time intervals. * * <span class="informal">Samples the source Observable at periodic time * intervals, emitting what it samples.</span> * * <img src="./img/sampleTime.png" width="100%"> * * `sampleTime` periodically looks at the source Observable and emits whichever * value it has most recently emitted since the previous sampling, unless the * source has not emitted anything since the previous sampling. The sampling * happens periodically in time every `period` milliseconds (or the time unit * defined by the optional `scheduler` argument). The sampling starts as soon as * the output Observable is subscribed. * * @example <caption>Every second, emit the most recent click at most once</caption> * var clicks = Rx.Observable.fromEvent(document, 'click'); * var result = clicks.sampleTime(1000); * result.subscribe(x => console.log(x)); * * @see {@link auditTime} * @see {@link debounceTime} * @see {@link delay} * @see {@link sample} * @see {@link throttleTime} * * @param {number} period The sampling period expressed in milliseconds or the * time unit determined internally by the optional `scheduler`. * @param {Scheduler} [scheduler=async] The {@link IScheduler} to use for * managing the timers that handle the sampling. * @return {Observable<T>} An Observable that emits the results of sampling the * values emitted by the source Observable at the specified time interval. * @method sampleTime * @owner Observable */ export function sampleTime(period, scheduler) { if (scheduler === void 0) { scheduler = async; } return higherOrder(period, scheduler)(this); } //# sourceMappingURL=sampleTime.js.map