| /** PURE_IMPORTS_START .._operators_mergeScan PURE_IMPORTS_END */ |
| import { mergeScan as higherOrder } from '../operators/mergeScan'; |
| /** |
| * Applies an accumulator function over the source Observable where the |
| * accumulator function itself returns an Observable, then each intermediate |
| * Observable returned is merged into the output Observable. |
| * |
| * <span class="informal">It's like {@link scan}, but the Observables returned |
| * by the accumulator are merged into the outer Observable.</span> |
| * |
| * @example <caption>Count the number of click events</caption> |
| * const click$ = Rx.Observable.fromEvent(document, 'click'); |
| * const one$ = click$.mapTo(1); |
| * const seed = 0; |
| * const count$ = one$.mergeScan((acc, one) => Rx.Observable.of(acc + one), seed); |
| * count$.subscribe(x => console.log(x)); |
| * |
| * // Results: |
| * 1 |
| * 2 |
| * 3 |
| * 4 |
| * // ...and so on for each click |
| * |
| * @param {function(acc: R, value: T): Observable<R>} accumulator |
| * The accumulator function called on each source value. |
| * @param seed The initial accumulation value. |
| * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of |
| * input Observables being subscribed to concurrently. |
| * @return {Observable<R>} An observable of the accumulated values. |
| * @method mergeScan |
| * @owner Observable |
| */ |
| export function mergeScan(accumulator, seed, concurrent) { |
| if (concurrent === void 0) { |
| concurrent = Number.POSITIVE_INFINITY; |
| } |
| return higherOrder(accumulator, seed, concurrent)(this); |
| } |
| //# sourceMappingURL=mergeScan.js.map |