| /** PURE_IMPORTS_START .._Observable,._ArrayObservable,.._util_isScheduler,.._operators_mergeAll PURE_IMPORTS_END */ |
| import { Observable } from '../Observable'; |
| import { ArrayObservable } from './ArrayObservable'; |
| import { isScheduler } from '../util/isScheduler'; |
| import { mergeAll } from '../operators/mergeAll'; |
| /* tslint:enable:max-line-length */ |
| /** |
| * Creates an output Observable which concurrently emits all values from every |
| * given input Observable. |
| * |
| * <span class="informal">Flattens multiple Observables together by blending |
| * their values into one Observable.</span> |
| * |
| * <img src="./img/merge.png" width="100%"> |
| * |
| * `merge` subscribes to each given input Observable (as arguments), and simply |
| * forwards (without doing any transformation) all the values from all the input |
| * Observables to the output Observable. The output Observable only completes |
| * once all input Observables have completed. Any error delivered by an input |
| * Observable will be immediately emitted on the output Observable. |
| * |
| * @example <caption>Merge together two Observables: 1s interval and clicks</caption> |
| * var clicks = Rx.Observable.fromEvent(document, 'click'); |
| * var timer = Rx.Observable.interval(1000); |
| * var clicksOrTimer = Rx.Observable.merge(clicks, timer); |
| * clicksOrTimer.subscribe(x => console.log(x)); |
| * |
| * // Results in the following: |
| * // timer will emit ascending values, one every second(1000ms) to console |
| * // clicks logs MouseEvents to console everytime the "document" is clicked |
| * // Since the two streams are merged you see these happening |
| * // as they occur. |
| * |
| * @example <caption>Merge together 3 Observables, but only 2 run concurrently</caption> |
| * var timer1 = Rx.Observable.interval(1000).take(10); |
| * var timer2 = Rx.Observable.interval(2000).take(6); |
| * var timer3 = Rx.Observable.interval(500).take(10); |
| * var concurrent = 2; // the argument |
| * var merged = Rx.Observable.merge(timer1, timer2, timer3, concurrent); |
| * merged.subscribe(x => console.log(x)); |
| * |
| * // Results in the following: |
| * // - First timer1 and timer2 will run concurrently |
| * // - timer1 will emit a value every 1000ms for 10 iterations |
| * // - timer2 will emit a value every 2000ms for 6 iterations |
| * // - after timer1 hits it's max iteration, timer2 will |
| * // continue, and timer3 will start to run concurrently with timer2 |
| * // - when timer2 hits it's max iteration it terminates, and |
| * // timer3 will continue to emit a value every 500ms until it is complete |
| * |
| * @see {@link mergeAll} |
| * @see {@link mergeMap} |
| * @see {@link mergeMapTo} |
| * @see {@link mergeScan} |
| * |
| * @param {...ObservableInput} observables Input Observables to merge together. |
| * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of input |
| * Observables being subscribed to concurrently. |
| * @param {Scheduler} [scheduler=null] The IScheduler to use for managing |
| * concurrency of input Observables. |
| * @return {Observable} an Observable that emits items that are the result of |
| * every input Observable. |
| * @static true |
| * @name merge |
| * @owner Observable |
| */ |
| export function merge() { |
| var observables = []; |
| for (var _i = 0; _i < arguments.length; _i++) { |
| observables[_i - 0] = arguments[_i]; |
| } |
| var concurrent = Number.POSITIVE_INFINITY; |
| var scheduler = null; |
| var last = observables[observables.length - 1]; |
| if (isScheduler(last)) { |
| scheduler = observables.pop(); |
| if (observables.length > 1 && typeof observables[observables.length - 1] === 'number') { |
| concurrent = observables.pop(); |
| } |
| } |
| else if (typeof last === 'number') { |
| concurrent = observables.pop(); |
| } |
| if (scheduler === null && observables.length === 1 && observables[0] instanceof Observable) { |
| return observables[0]; |
| } |
| return mergeAll(concurrent)(new ArrayObservable(observables, scheduler)); |
| } |
| //# sourceMappingURL=merge.js.map |