53 lines
2.3 KiB
JavaScript
53 lines
2.3 KiB
JavaScript
"use strict";
|
|
var mergeMap_1 = require('./mergeMap');
|
|
var identity_1 = require('../util/identity');
|
|
/**
|
|
* Converts a higher-order Observable into a first-order Observable which
|
|
* concurrently delivers all values that are emitted on the inner Observables.
|
|
*
|
|
* <span class="informal">Flattens an Observable-of-Observables.</span>
|
|
*
|
|
* <img src="./img/mergeAll.png" width="100%">
|
|
*
|
|
* `mergeAll` subscribes to an Observable that emits Observables, also known as
|
|
* a higher-order Observable. Each time it observes one of these emitted inner
|
|
* Observables, it subscribes to that and delivers all the values from the
|
|
* inner Observable on the output Observable. The output Observable only
|
|
* completes once all inner Observables have completed. Any error delivered by
|
|
* a inner Observable will be immediately emitted on the output Observable.
|
|
*
|
|
* @example <caption>Spawn a new interval Observable for each click event, and blend their outputs as one Observable</caption>
|
|
* var clicks = Rx.Observable.fromEvent(document, 'click');
|
|
* var higherOrder = clicks.map((ev) => Rx.Observable.interval(1000));
|
|
* var firstOrder = higherOrder.mergeAll();
|
|
* firstOrder.subscribe(x => console.log(x));
|
|
*
|
|
* @example <caption>Count from 0 to 9 every second for each click, but only allow 2 concurrent timers</caption>
|
|
* var clicks = Rx.Observable.fromEvent(document, 'click');
|
|
* var higherOrder = clicks.map((ev) => Rx.Observable.interval(1000).take(10));
|
|
* var firstOrder = higherOrder.mergeAll(2);
|
|
* firstOrder.subscribe(x => console.log(x));
|
|
*
|
|
* @see {@link combineAll}
|
|
* @see {@link concatAll}
|
|
* @see {@link exhaust}
|
|
* @see {@link merge}
|
|
* @see {@link mergeMap}
|
|
* @see {@link mergeMapTo}
|
|
* @see {@link mergeScan}
|
|
* @see {@link switch}
|
|
* @see {@link zipAll}
|
|
*
|
|
* @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of inner
|
|
* Observables being subscribed to concurrently.
|
|
* @return {Observable} An Observable that emits values coming from all the
|
|
* inner Observables emitted by the source Observable.
|
|
* @method mergeAll
|
|
* @owner Observable
|
|
*/
|
|
function mergeAll(concurrent) {
|
|
if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }
|
|
return mergeMap_1.mergeMap(identity_1.identity, null, concurrent);
|
|
}
|
|
exports.mergeAll = mergeAll;
|
|
//# sourceMappingURL=mergeAll.js.map
|