first commit

liusuyi

2023-04-24 4737f1e038743ced243c9e52423404d9034d6107

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