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node_modules/rxjs/_esm2015/observable/merge.js

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+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(...observables) {
+    let concurrent = Number.POSITIVE_INFINITY;
+    let scheduler = null;
+    let 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