import { switchMap as higherOrderSwitchMap } from '../operators/switchMap'; /* tslint:enable:max-line-length */ /** * Projects each source value to an Observable which is merged in the output * Observable, emitting values only from the most recently projected Observable. * * Maps each value to an Observable, then flattens all of * these inner Observables using {@link switch}. * * * * Returns an Observable that emits items based on applying a function that you * supply to each item emitted by the source Observable, where that function * returns an (so-called "inner") Observable. Each time it observes one of these * inner Observables, the output Observable begins emitting the items emitted by * that inner Observable. When a new inner Observable is emitted, `switchMap` * stops emitting items from the earlier-emitted inner Observable and begins * emitting items from the new one. It continues to behave like this for * subsequent inner Observables. * * @example Rerun an interval Observable on every click event * var clicks = Rx.Observable.fromEvent(document, 'click'); * var result = clicks.switchMap((ev) => Rx.Observable.interval(1000)); * result.subscribe(x => console.log(x)); * * @see {@link concatMap} * @see {@link exhaustMap} * @see {@link mergeMap} * @see {@link switch} * @see {@link switchMapTo} * * @param {function(value: T, ?index: number): ObservableInput} project A function * that, when applied to an item emitted by the source Observable, returns an * Observable. * @param {function(outerValue: T, innerValue: I, outerIndex: number, innerIndex: number): any} [resultSelector] * A function to produce the value on the output Observable based on the values * and the indices of the source (outer) emission and the inner Observable * emission. The arguments passed to this function are: * - `outerValue`: the value that came from the source * - `innerValue`: the value that came from the projected Observable * - `outerIndex`: the "index" of the value that came from the source * - `innerIndex`: the "index" of the value from the projected Observable * @return {Observable} An Observable that emits the result of applying the * projection function (and the optional `resultSelector`) to each item emitted * by the source Observable and taking only the values from the most recently * projected inner Observable. * @method switchMap * @owner Observable */ export function switchMap(project, resultSelector) { return higherOrderSwitchMap(project, resultSelector)(this); } //# sourceMappingURL=switchMap.js.map