work.suroh.tk/node_modules/rxjs/operators/withLatestFrom.js.map

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{ Operator } from '../Operator';\nimport { Subscriber } from '../Subscriber';\nimport { Observable, ObservableInput } from '../Observable';\nimport { OuterSubscriber } from '../OuterSubscriber';\nimport { InnerSubscriber } from '../InnerSubscriber';\nimport { subscribeToResult } from '../util/subscribeToResult';\nimport { OperatorFunction } from '../interfaces';\n\n/* tslint:disable:max-line-length */\nexport function withLatestFrom<T, R>(project: (v1: T) => R): OperatorFunction<T, R>;\nexport function withLatestFrom<T, T2, R>(v2: ObservableInput<T2>, project: (v1: T, v2: T2) => R): OperatorFunction<T, R>;\nexport function withLatestFrom<T, T2, T3, R>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, project: (v1: T, v2: T2, v3: T3) => R): OperatorFunction<T, R>;\nexport function withLatestFrom<T, T2, T3, T4, R>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, project: (v1: T, v2: T2, v3: T3, v4: T4) => R): OperatorFunction<T, R>;\nexport function withLatestFrom<T, T2, T3, T4, T5, R>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, project: (v1: T, v2: T2, v3: T3, v4: T4, v5: T5) => R): OperatorFunction<T, R>;\nexport function withLatestFrom<T, T2, T3, T4, T5, T6, R>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, v6: ObservableInput<T6>, project: (v1: T, v2: T2, v3: T3, v4: T4, v5: T5, v6: T6) => R): OperatorFunction<T, R> ;\nexport function withLatestFrom<T, T2>(v2: ObservableInput<T2>): OperatorFunction<T, [T, T2]>;\nexport function withLatestFrom<T, T2, T3>(v2: ObservableInput<T2>, v3: ObservableInput<T3>): OperatorFunction<T, [T, T2, T3]>;\nexport function withLatestFrom<T, T2, T3, T4>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>): OperatorFunction<T, [T, T2, T3, T4]>;\nexport function withLatestFrom<T, T2, T3, T4, T5>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>): OperatorFunction<T, [T, T2, T3, T4, T5]>;\nexport function withLatestFrom<T, T2, T3, T4, T5, T6>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, v6: ObservableInput<T6>): OperatorFunction<T, [T, T2, T3, T4, T5, T6]> ;\nexport function withLatestFrom<T, R>(...observables: Array<ObservableInput<any> | ((...values: Array<any>) => R)>): OperatorFunction<T, R>;\nexport function withLatestFrom<T, R>(array: ObservableInput<any>[]): OperatorFunction<T, R>;\nexport function withLatestFrom<T, R>(array: ObservableInput<any>[], project: (...values: Array<any>) => R): OperatorFunction<T, R>;\n/* tslint:enable:max-line-length */\n\n/**\n * Combines the source Observable with other Observables to create an Observable\n * whose values are calculated from the latest values of each, only when the\n * source emits.\n *\n * <span class=\"informal\">Whenever the source Observable emits a value, it\n * computes a formula using that value plus the latest values from other input\n * Observables, then emits the output of that formula.</span>\n *\n * <img src=\"./img/withLatestFrom.png\" width=\"100%\">\n *\n * `withLatestFrom` combines each value from the source Observable (the\n * instance) with the latest values from the other input Observables only when\n * the source emits a value, optionally using a `project` function to determine\n * the value to be emitted on the output Observable. All input Observables must\n * emit at least one value before the output Observable will emit a value.\n *\n * @example <caption>On every click event, emit an array with the latest timer event plus the click event</caption>\n * var clicks = Rx.Observable.fromEvent(document, 'click');\n * var timer = Rx.Observable.interval(1000);\n * var result = clicks.withLatestFrom(timer);\n * result.subscribe(x => console.log(x));\n *\n * @see {@link combineLatest}\n *\n * @param {ObservableInput} other An input Observable to combine with the source\n * Observable. More than one input Observables may be given as argument.\n * @param {Function} [project] Projection function for combining values\n * together. Receives all values in order of the Observables passed, where the\n * first parameter is a value from the source Observable. (e.g.\n * `a.withLatestFrom(b, c, (a1, b1, c1) => a1 + b1 + c1)`). If this is not\n * passed, arrays will be emitted on the output Observable.\n * @return {Observable} An Observable of projected values from the most recent\n * values from each input Observable, or an array of the most recent values from\n * each input Observable.\n * @method withLatestFrom\n * @owner Observable\n */\nexport function withLatestFrom<T, R>(...args: Array<ObservableInput<any> | ((...values: Array<any>) => R)>): OperatorFunction<T, R> {\n return (source: Observable<T>) => {\n let project: any;\n if (typeof args[args.length - 1] === 'function') {\n project = args.pop();\n }\n const observables = <Observable<any>[]>args;\n return source.lift(new WithLatestFromOperator(observables, project));\n };\n}\n\nclass WithLatestFromOperator<T, R> implements Operator<T, R> {\n constructor(private observables: Observable<any>[],\n private project?: (...values: any[]) => Observable<R>) {\n }\n\n call(subscriber: Subscriber<R>, source: any): any {\n return source.subscribe(new WithLatestFromSubscriber(subscriber, this.observables, this.project));\n }\n}\n\n/**\n * We need this JSDoc comment for affecting ESDoc.\n * @ignore\n * @extends {Ignored}\n */\nclass WithLatestFromSubscriber<T, R> extends OuterSubscriber<T, R> {\n private values: any[];\n private toRespond: number[] = [];\n\n constructor(destination: Subscriber<R>,\n private observables: Observable<any>[],\n private project?: (...values: any[]) => Observable<R>) {\n super(destination);\n const len = observables.length;\n this.values = new Array(len);\n\n for (let i = 0; i < len; i++) {\n this.toRespond.push(i);\n }\n\n for (let i = 0; i < len; i++) {\n let observable = observables[i];\n this.add(subscribeToResult<T, R>(this, observable, <any>observable, i));\n }\n }\n\n notifyNext(outerValue: T, innerValue: R,\n outerIndex: number, innerIndex: number,\n innerSub: InnerSubscriber<T, R>): void {\n this.values[outerIndex] = innerValue;\n const toRespond = this.toRespond;\n if (toRespond.length > 0) {\n const found = toRespond.indexOf(outerIndex);\n if (found !== -1) {\n toRespond.splice(found, 1);\n }\n }\n }\n\n notifyComplete() {\n // noop\n }\n\n protected _next(value: T) {\n if (this.toRespond.length === 0) {\n const args = [value, ...this.values];\n if (this.project) {\n this._tryProject(args);\n } else {\n this.destination.next(args);\n }\n }\n }\n\n private _tryProject(args: any[]) {\n let result: any;\n try {\n result = this.project.apply(this, args);\n } catch (err) {\n this.destination.error(err);\n return;\n }\n this.destination.next(result);\n }\n}\n"]}