| import { exhaustMap as higherOrder } from '../operators/exhaustMap'; |
| /* tslint:enable:max-line-length */ |
| /** |
| * Projects each source value to an Observable which is merged in the output |
| * Observable only if the previous projected Observable has completed. |
| * |
| * <span class="informal">Maps each value to an Observable, then flattens all of |
| * these inner Observables using {@link exhaust}.</span> |
| * |
| * <img src="./img/exhaustMap.png" width="100%"> |
| * |
| * 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. When it projects a source value to |
| * an Observable, the output Observable begins emitting the items emitted by |
| * that projected Observable. However, `exhaustMap` ignores every new projected |
| * Observable if the previous projected Observable has not yet completed. Once |
| * that one completes, it will accept and flatten the next projected Observable |
| * and repeat this process. |
| * |
| * @example <caption>Run a finite timer for each click, only if there is no currently active timer</caption> |
| * var clicks = Rx.Observable.fromEvent(document, 'click'); |
| * var result = clicks.exhaustMap((ev) => Rx.Observable.interval(1000).take(5)); |
| * result.subscribe(x => console.log(x)); |
| * |
| * @see {@link concatMap} |
| * @see {@link exhaust} |
| * @see {@link mergeMap} |
| * @see {@link switchMap} |
| * |
| * @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 containing projected Observables |
| * of each item of the source, ignoring projected Observables that start before |
| * their preceding Observable has completed. |
| * @method exhaustMap |
| * @owner Observable |
| */ |
| export function exhaustMap(project, resultSelector) { |
| return higherOrder(project, resultSelector)(this); |
| } |
| //# sourceMappingURL=exhaustMap.js.map |
