| /** PURE_IMPORTS_START .._operators_withLatestFrom PURE_IMPORTS_END */ |
| import { withLatestFrom as higherOrder } from '../operators/withLatestFrom'; |
| /* tslint:enable:max-line-length */ |
| /** |
| * Combines the source Observable with other Observables to create an Observable |
| * whose values are calculated from the latest values of each, only when the |
| * source emits. |
| * |
| * <span class="informal">Whenever the source Observable emits a value, it |
| * computes a formula using that value plus the latest values from other input |
| * Observables, then emits the output of that formula.</span> |
| * |
| * <img src="./img/withLatestFrom.png" width="100%"> |
| * |
| * `withLatestFrom` combines each value from the source Observable (the |
| * instance) with the latest values from the other input Observables only when |
| * the source emits a value, optionally using a `project` function to determine |
| * the value to be emitted on the output Observable. All input Observables must |
| * emit at least one value before the output Observable will emit a value. |
| * |
| * @example <caption>On every click event, emit an array with the latest timer event plus the click event</caption> |
| * var clicks = Rx.Observable.fromEvent(document, 'click'); |
| * var timer = Rx.Observable.interval(1000); |
| * var result = clicks.withLatestFrom(timer); |
| * result.subscribe(x => console.log(x)); |
| * |
| * @see {@link combineLatest} |
| * |
| * @param {ObservableInput} other An input Observable to combine with the source |
| * Observable. More than one input Observables may be given as argument. |
| * @param {Function} [project] Projection function for combining values |
| * together. Receives all values in order of the Observables passed, where the |
| * first parameter is a value from the source Observable. (e.g. |
| * `a.withLatestFrom(b, c, (a1, b1, c1) => a1 + b1 + c1)`). If this is not |
| * passed, arrays will be emitted on the output Observable. |
| * @return {Observable} An Observable of projected values from the most recent |
| * values from each input Observable, or an array of the most recent values from |
| * each input Observable. |
| * @method withLatestFrom |
| * @owner Observable |
| */ |
| export function withLatestFrom() { |
| var args = []; |
| for (var _i = 0; _i < arguments.length; _i++) { |
| args[_i - 0] = arguments[_i]; |
| } |
| return higherOrder.apply(void 0, args)(this); |
| } |
| //# sourceMappingURL=withLatestFrom.js.map |