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node_modules/rxjs/src/operators/share.ts
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EvgeniyBudaev
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17 фев 2020, 09:02
17 фев 2020, 09:02
bb6f06f
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import { Observable } from '../Observable'; import { multicast } from './multicast'; import { refCount } from './refCount'; import { Subject } from '../Subject'; import { MonoTypeOperatorFunction } from '../interfaces'; function shareSubjectFactory() { return new Subject(); } /** * Returns a new Observable that multicasts (shares) the original Observable. As long as there is at least one * Subscriber this Observable will be subscribed and emitting data. When all subscribers have unsubscribed it will * unsubscribe from the source Observable. Because the Observable is multicasting it makes the stream `hot`. * This is an alias for .multicast(() => new Subject()).refCount(). * * <img src="./img/share.png" width="100%"> * * @return {Observable<T>} An Observable that upon connection causes the source Observable to emit items to its Observers. * @method share * @owner Observable */ export function share<T>(): MonoTypeOperatorFunction<T> { return (source: Observable<T>) => refCount()(multicast(shareSubjectFactory)(source)) as Observable<T>; };