49 lines
2.1 KiB
TypeScript
49 lines
2.1 KiB
TypeScript
|
import { MonoTypeOperatorFunction, SubscribableOrPromise } from '../types';
|
||
|
|
/**
|
||
|
|
* Ignores source values for a duration determined by another Observable, then
|
||
|
|
* emits the most recent value from the source Observable, then repeats this
|
||
|
|
* process.
|
||
|
|
*
|
||
|
|
* <span class="informal">It's like {@link auditTime}, but the silencing
|
||
|
|
* duration is determined by a second Observable.</span>
|
||
|
|
*
|
||
|
|
* 
|
||
|
|
*
|
||
|
|
* `audit` is similar to `throttle`, but emits the last value from the silenced
|
||
|
|
* time window, instead of the first value. `audit` emits the most recent value
|
||
|
|
* from the source Observable on the output Observable as soon as its internal
|
||
|
|
* timer becomes disabled, and ignores source values while the timer is enabled.
|
||
|
|
* Initially, the timer is disabled. As soon as the first source value arrives,
|
||
|
|
* the timer is enabled by calling the `durationSelector` function with the
|
||
|
|
* source value, which returns the "duration" Observable. When the duration
|
||
|
|
* Observable emits a value or completes, the timer is disabled, then the most
|
||
|
|
* recent source value is emitted on the output Observable, and this process
|
||
|
|
* repeats for the next source value.
|
||
|
|
*
|
||
|
|
* ## Example
|
||
|
|
*
|
||
|
|
* Emit clicks at a rate of at most one click per second
|
||
|
|
* ```ts
|
||
|
|
* import { fromEvent, interval } from 'rxjs';
|
||
|
|
* import { audit } from 'rxjs/operators'
|
||
|
|
*
|
||
|
|
* const clicks = fromEvent(document, 'click');
|
||
|
|
* const result = clicks.pipe(audit(ev => interval(1000)));
|
||
|
|
* result.subscribe(x => console.log(x));
|
||
|
|
* ```
|
||
|
|
* @see {@link auditTime}
|
||
|
|
* @see {@link debounce}
|
||
|
|
* @see {@link delayWhen}
|
||
|
|
* @see {@link sample}
|
||
|
|
* @see {@link throttle}
|
||
|
|
*
|
||
|
|
* @param {function(value: T): SubscribableOrPromise} durationSelector A function
|
||
|
|
* that receives a value from the source Observable, for computing the silencing
|
||
|
|
* duration, returned as an Observable or a Promise.
|
||
|
|
* @return {Observable<T>} An Observable that performs rate-limiting of
|
||
|
|
* emissions from the source Observable.
|
||
|
|
* @method audit
|
||
|
|
* @owner Observable
|
||
|
|
*/
|
||
|
|
export declare function audit<T>(durationSelector: (value: T) => SubscribableOrPromise<any>): MonoTypeOperatorFunction<T>;
|