biobulkbende.org/node_modules/rxjs/_esm2015/operator/windowToggle.js
2020-09-16 14:23:28 +02:00

46 lines
1.9 KiB
JavaScript

import { windowToggle as higherOrder } from '../operators/windowToggle';
/**
* Branch out the source Observable values as a nested Observable starting from
* an emission from `openings` and ending when the output of `closingSelector`
* emits.
*
* <span class="informal">It's like {@link bufferToggle}, but emits a nested
* Observable instead of an array.</span>
*
* <img src="./img/windowToggle.png" width="100%">
*
* Returns an Observable that emits windows of items it collects from the source
* Observable. The output Observable emits windows that contain those items
* emitted by the source Observable between the time when the `openings`
* Observable emits an item and when the Observable returned by
* `closingSelector` emits an item.
*
* @example <caption>Every other second, emit the click events from the next 500ms</caption>
* var clicks = Rx.Observable.fromEvent(document, 'click');
* var openings = Rx.Observable.interval(1000);
* var result = clicks.windowToggle(openings, i =>
* i % 2 ? Rx.Observable.interval(500) : Rx.Observable.empty()
* ).mergeAll();
* result.subscribe(x => console.log(x));
*
* @see {@link window}
* @see {@link windowCount}
* @see {@link windowTime}
* @see {@link windowWhen}
* @see {@link bufferToggle}
*
* @param {Observable<O>} openings An observable of notifications to start new
* windows.
* @param {function(value: O): Observable} closingSelector A function that takes
* the value emitted by the `openings` observable and returns an Observable,
* which, when it emits (either `next` or `complete`), signals that the
* associated window should complete.
* @return {Observable<Observable<T>>} An observable of windows, which in turn
* are Observables.
* @method windowToggle
* @owner Observable
*/
export function windowToggle(openings, closingSelector) {
return higherOrder(openings, closingSelector)(this);
}
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