24 lines
1.2 KiB
JavaScript
24 lines
1.2 KiB
JavaScript
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import { innerFrom } from '../observable/innerFrom';
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import { operate } from '../util/lift';
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import { createOperatorSubscriber } from './OperatorSubscriber';
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export function switchMap(project, resultSelector) {
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return operate(function (source, subscriber) {
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var innerSubscriber = null;
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var index = 0;
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var isComplete = false;
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var checkComplete = function () { return isComplete && !innerSubscriber && subscriber.complete(); };
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source.subscribe(createOperatorSubscriber(subscriber, function (value) {
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innerSubscriber === null || innerSubscriber === void 0 ? void 0 : innerSubscriber.unsubscribe();
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var innerIndex = 0;
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var outerIndex = index++;
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innerFrom(project(value, outerIndex)).subscribe((innerSubscriber = createOperatorSubscriber(subscriber, function (innerValue) { return subscriber.next(resultSelector ? resultSelector(value, innerValue, outerIndex, innerIndex++) : innerValue); }, function () {
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innerSubscriber = null;
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checkComplete();
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})));
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}, function () {
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isComplete = true;
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checkComplete();
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}));
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});
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}
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//# sourceMappingURL=switchMap.js.map
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