25 lines
1.0 KiB
JavaScript
25 lines
1.0 KiB
JavaScript
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import { Observable } from '../Observable';
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import { innerFrom } from './innerFrom';
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import { argsOrArgArray } from '../util/argsOrArgArray';
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import { createOperatorSubscriber } from '../operators/OperatorSubscriber';
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export function race(...sources) {
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sources = argsOrArgArray(sources);
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return sources.length === 1 ? innerFrom(sources[0]) : new Observable(raceInit(sources));
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}
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export function raceInit(sources) {
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return (subscriber) => {
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let subscriptions = [];
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for (let i = 0; subscriptions && !subscriber.closed && i < sources.length; i++) {
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subscriptions.push(innerFrom(sources[i]).subscribe(createOperatorSubscriber(subscriber, (value) => {
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if (subscriptions) {
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for (let s = 0; s < subscriptions.length; s++) {
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s !== i && subscriptions[s].unsubscribe();
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}
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subscriptions = null;
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}
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subscriber.next(value);
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})));
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}
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};
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}
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//# sourceMappingURL=race.js.map
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