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