1 import { isScheduler } from '../util/isScheduler';
2 import { isArray } from '../util/isArray';
3 import { OuterSubscriber } from '../OuterSubscriber';
4 import { subscribeToResult } from '../util/subscribeToResult';
5 import { fromArray } from './fromArray';
7 export function combineLatest(...observables) {
8 let resultSelector = undefined;
9 let scheduler = undefined;
10 if (isScheduler(observables[observables.length - 1])) {
11 scheduler = observables.pop();
13 if (typeof observables[observables.length - 1] === 'function') {
14 resultSelector = observables.pop();
16 if (observables.length === 1 && isArray(observables[0])) {
17 observables = observables[0];
19 return fromArray(observables, scheduler).lift(new CombineLatestOperator(resultSelector));
21 export class CombineLatestOperator {
22 constructor(resultSelector) {
23 this.resultSelector = resultSelector;
25 call(subscriber, source) {
26 return source.subscribe(new CombineLatestSubscriber(subscriber, this.resultSelector));
29 export class CombineLatestSubscriber extends OuterSubscriber {
30 constructor(destination, resultSelector) {
32 this.resultSelector = resultSelector;
35 this.observables = [];
38 this.values.push(NONE);
39 this.observables.push(observable);
42 const observables = this.observables;
43 const len = observables.length;
45 this.destination.complete();
50 for (let i = 0; i < len; i++) {
51 const observable = observables[i];
52 this.add(subscribeToResult(this, observable, undefined, i));
56 notifyComplete(unused) {
57 if ((this.active -= 1) === 0) {
58 this.destination.complete();
61 notifyNext(_outerValue, innerValue, outerIndex) {
62 const values = this.values;
63 const oldVal = values[outerIndex];
64 const toRespond = !this.toRespond
66 : oldVal === NONE ? --this.toRespond : this.toRespond;
67 values[outerIndex] = innerValue;
68 if (toRespond === 0) {
69 if (this.resultSelector) {
70 this._tryResultSelector(values);
73 this.destination.next(values.slice());
77 _tryResultSelector(values) {
80 result = this.resultSelector.apply(this, values);
83 this.destination.error(err);
86 this.destination.next(result);
89 //# sourceMappingURL=combineLatest.js.map