| import { isScheduler } from '../util/isScheduler'; | 
| import { isArray } from '../util/isArray'; | 
| import { OuterSubscriber } from '../OuterSubscriber'; | 
| import { subscribeToResult } from '../util/subscribeToResult'; | 
| import { fromArray } from './fromArray'; | 
| const NONE = {}; | 
| export function combineLatest(...observables) { | 
|     let resultSelector = undefined; | 
|     let scheduler = undefined; | 
|     if (isScheduler(observables[observables.length - 1])) { | 
|         scheduler = observables.pop(); | 
|     } | 
|     if (typeof observables[observables.length - 1] === 'function') { | 
|         resultSelector = observables.pop(); | 
|     } | 
|     if (observables.length === 1 && isArray(observables[0])) { | 
|         observables = observables[0]; | 
|     } | 
|     return fromArray(observables, scheduler).lift(new CombineLatestOperator(resultSelector)); | 
| } | 
| export class CombineLatestOperator { | 
|     constructor(resultSelector) { | 
|         this.resultSelector = resultSelector; | 
|     } | 
|     call(subscriber, source) { | 
|         return source.subscribe(new CombineLatestSubscriber(subscriber, this.resultSelector)); | 
|     } | 
| } | 
| export class CombineLatestSubscriber extends OuterSubscriber { | 
|     constructor(destination, resultSelector) { | 
|         super(destination); | 
|         this.resultSelector = resultSelector; | 
|         this.active = 0; | 
|         this.values = []; | 
|         this.observables = []; | 
|     } | 
|     _next(observable) { | 
|         this.values.push(NONE); | 
|         this.observables.push(observable); | 
|     } | 
|     _complete() { | 
|         const observables = this.observables; | 
|         const len = observables.length; | 
|         if (len === 0) { | 
|             this.destination.complete(); | 
|         } | 
|         else { | 
|             this.active = len; | 
|             this.toRespond = len; | 
|             for (let i = 0; i < len; i++) { | 
|                 const observable = observables[i]; | 
|                 this.add(subscribeToResult(this, observable, undefined, i)); | 
|             } | 
|         } | 
|     } | 
|     notifyComplete(unused) { | 
|         if ((this.active -= 1) === 0) { | 
|             this.destination.complete(); | 
|         } | 
|     } | 
|     notifyNext(_outerValue, innerValue, outerIndex) { | 
|         const values = this.values; | 
|         const oldVal = values[outerIndex]; | 
|         const toRespond = !this.toRespond | 
|             ? 0 | 
|             : oldVal === NONE ? --this.toRespond : this.toRespond; | 
|         values[outerIndex] = innerValue; | 
|         if (toRespond === 0) { | 
|             if (this.resultSelector) { | 
|                 this._tryResultSelector(values); | 
|             } | 
|             else { | 
|                 this.destination.next(values.slice()); | 
|             } | 
|         } | 
|     } | 
|     _tryResultSelector(values) { | 
|         let result; | 
|         try { | 
|             result = this.resultSelector.apply(this, values); | 
|         } | 
|         catch (err) { | 
|             this.destination.error(err); | 
|             return; | 
|         } | 
|         this.destination.next(result); | 
|     } | 
| } | 
| //# sourceMappingURL=combineLatest.js.map |