54 lines
2.0 KiB
JavaScript
54 lines
2.0 KiB
JavaScript
import { concatAll as higherOrder } from '../operators/concatAll';
|
|
/* tslint:enable:max-line-length */
|
|
/**
|
|
* Converts a higher-order Observable into a first-order Observable by
|
|
* concatenating the inner Observables in order.
|
|
*
|
|
* <span class="informal">Flattens an Observable-of-Observables by putting one
|
|
* inner Observable after the other.</span>
|
|
*
|
|
* <img src="./img/concatAll.png" width="100%">
|
|
*
|
|
* Joins every Observable emitted by the source (a higher-order Observable), in
|
|
* a serial fashion. It subscribes to each inner Observable only after the
|
|
* previous inner Observable has completed, and merges all of their values into
|
|
* the returned observable.
|
|
*
|
|
* __Warning:__ If the source Observable emits Observables quickly and
|
|
* endlessly, and the inner Observables it emits generally complete slower than
|
|
* the source emits, you can run into memory issues as the incoming Observables
|
|
* collect in an unbounded buffer.
|
|
*
|
|
* Note: `concatAll` is equivalent to `mergeAll` with concurrency parameter set
|
|
* to `1`.
|
|
*
|
|
* @example <caption>For each click event, tick every second from 0 to 3, with no concurrency</caption>
|
|
* var clicks = Rx.Observable.fromEvent(document, 'click');
|
|
* var higherOrder = clicks.map(ev => Rx.Observable.interval(1000).take(4));
|
|
* var firstOrder = higherOrder.concatAll();
|
|
* firstOrder.subscribe(x => console.log(x));
|
|
*
|
|
* // Results in the following:
|
|
* // (results are not concurrent)
|
|
* // For every click on the "document" it will emit values 0 to 3 spaced
|
|
* // on a 1000ms interval
|
|
* // one click = 1000ms-> 0 -1000ms-> 1 -1000ms-> 2 -1000ms-> 3
|
|
*
|
|
* @see {@link combineAll}
|
|
* @see {@link concat}
|
|
* @see {@link concatMap}
|
|
* @see {@link concatMapTo}
|
|
* @see {@link exhaust}
|
|
* @see {@link mergeAll}
|
|
* @see {@link switch}
|
|
* @see {@link zipAll}
|
|
*
|
|
* @return {Observable} An Observable emitting values from all the inner
|
|
* Observables concatenated.
|
|
* @method concatAll
|
|
* @owner Observable
|
|
*/
|
|
export function concatAll() {
|
|
return higherOrder()(this);
|
|
}
|
|
//# sourceMappingURL=concatAll.js.map
|