--- /dev/null
+import { Observable } from '../Observable';
+import { ObservableInput, SchedulerLike, ObservedValueOf } from '../types';
+import { isScheduler } from '../util/isScheduler';
+import { isArray } from '../util/isArray';
+import { Subscriber } from '../Subscriber';
+import { OuterSubscriber } from '../OuterSubscriber';
+import { Operator } from '../Operator';
+import { InnerSubscriber } from '../InnerSubscriber';
+import { subscribeToResult } from '../util/subscribeToResult';
+import { fromArray } from './fromArray';
+
+const NONE = {};
+
+/* tslint:disable:max-line-length */
+
+// If called with a single array, it "auto-spreads" the array, with result selector
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, R>(sources: [O1], resultSelector: (v1: ObservedValueOf<O1>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, R>(sources: [O1, O2], resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, R>(sources: [O1, O2, O3], resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>, v3: ObservedValueOf<O3>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, R>(sources: [O1, O2, O3, O4], resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>, v3: ObservedValueOf<O3>, v4: ObservedValueOf<O4>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>, R>(sources: [O1, O2, O3, O4, O5], resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>, v3: ObservedValueOf<O3>, v4: ObservedValueOf<O4>, v5: ObservedValueOf<O5>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>, O6 extends ObservableInput<any>, R>(sources: [O1, O2, O3, O4, O5, O6], resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>, v3: ObservedValueOf<O3>, v4: ObservedValueOf<O4>, v5: ObservedValueOf<O5>, v6: ObservedValueOf<O6>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O extends ObservableInput<any>, R>(sources: O[], resultSelector: (...args: ObservedValueOf<O>[]) => R, scheduler?: SchedulerLike): Observable<R>;
+
+// standard call, but with a result selector
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, R>(v1: O1, resultSelector: (v1: ObservedValueOf<O1>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, R>(v1: O1, v2: O2, resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, R>(v1: O1, v2: O2, v3: O3, resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>, v3: ObservedValueOf<O3>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, R>(v1: O1, v2: O2, v3: O3, v4: O4, resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>, v3: ObservedValueOf<O3>, v4: ObservedValueOf<O4>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>, R>(v1: O1, v2: O2, v3: O3, v4: O4, v5: O5, resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>, v3: ObservedValueOf<O3>, v4: ObservedValueOf<O4>, v5: ObservedValueOf<O5>) => R, scheduler?: SchedulerLike): Observable<R>;
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>, O6 extends ObservableInput<any>, R>(v1: O1, v2: O2, v3: O3, v4: O4, v5: O5, v6: O6, resultSelector: (v1: ObservedValueOf<O1>, v2: ObservedValueOf<O2>, v3: ObservedValueOf<O3>, v4: ObservedValueOf<O4>, v5: ObservedValueOf<O5>, v6: ObservedValueOf<O6>) => R, scheduler?: SchedulerLike): Observable<R>;
+
+// With a scheduler (deprecated)
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<O1 extends ObservableInput<any>>(sources: [O1], scheduler: SchedulerLike): Observable<[ObservedValueOf<O1>]>;
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>>(sources: [O1, O2], scheduler: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>]>;
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>>(sources: [O1, O2, O3], scheduler: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>]>;
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>>(sources: [O1, O2, O3, O4], scheduler: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>, ObservedValueOf<O4>]>;
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>>(sources: [O1, O2, O3, O4, O5], scheduler: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>, ObservedValueOf<O4>, ObservedValueOf<O5>]>;
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>, O6 extends ObservableInput<any>>(sources: [O1, O2, O3, O4, O5, O6], scheduler: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>, ObservedValueOf<O4>, ObservedValueOf<O5>, ObservedValueOf<O6>]>;
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<O extends ObservableInput<any>>(sources: O[], scheduler: SchedulerLike): Observable<ObservedValueOf<O>[]>;
+
+// Best case
+export function combineLatest<O1 extends ObservableInput<any>>(sources: [O1]): Observable<[ObservedValueOf<O1>]>;
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>>(sources: [O1, O2]): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>]>;
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>>(sources: [O1, O2, O3]): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>]>;
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>>(sources: [O1, O2, O3, O4]): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>, ObservedValueOf<O4>]>;
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>>(sources: [O1, O2, O3, O4, O5]): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>, ObservedValueOf<O4>, ObservedValueOf<O5>]>;
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>, O6 extends ObservableInput<any>>(sources: [O1, O2, O3, O4, O5, O6]): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>, ObservedValueOf<O4>, ObservedValueOf<O5>, ObservedValueOf<O6>]>;
+export function combineLatest<O extends ObservableInput<any>>(sources: O[]): Observable<ObservedValueOf<O>[]>;
+
+// Standard calls
+/** @deprecated Pass arguments in a single array instead `combineLatest([a, b, c])` */
+export function combineLatest<O1 extends ObservableInput<any>>(v1: O1, scheduler?: SchedulerLike): Observable<[ObservedValueOf<O1>]>;
+/** @deprecated Pass arguments in a single array instead `combineLatest([a, b, c])` */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>>(v1: O1, v2: O2, scheduler?: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>]>;
+/** @deprecated Pass arguments in a single array instead `combineLatest([a, b, c])` */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>>(v1: O1, v2: O2, v3: O3, scheduler?: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>]>;
+/** @deprecated Pass arguments in a single array instead `combineLatest([a, b, c])` */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>>(v1: O1, v2: O2, v3: O3, v4: O4, scheduler?: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>, ObservedValueOf<O4>]>;
+/** @deprecated Pass arguments in a single array instead `combineLatest([a, b, c])` */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>>(v1: O1, v2: O2, v3: O3, v4: O4, v5: O5, scheduler?: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>, ObservedValueOf<O4>, ObservedValueOf<O5>]>;
+/** @deprecated Pass arguments in a single array instead `combineLatest([a, b, c])` */
+export function combineLatest<O1 extends ObservableInput<any>, O2 extends ObservableInput<any>, O3 extends ObservableInput<any>, O4 extends ObservableInput<any>, O5 extends ObservableInput<any>, O6 extends ObservableInput<any>>(v1: O1, v2: O2, v3: O3, v4: O4, v5: O5, v6: O6, scheduler?: SchedulerLike): Observable<[ObservedValueOf<O1>, ObservedValueOf<O2>, ObservedValueOf<O3>, ObservedValueOf<O4>, ObservedValueOf<O5>, ObservedValueOf<O6>]>;
+
+/** @deprecated Pass arguments in a single array instead `combineLatest([a, b, c])` */
+export function combineLatest<O extends ObservableInput<any>>(...observables: O[]): Observable<any[]>;
+
+/** @deprecated Pass arguments in a single array instead `combineLatest([a, b, c])` */
+export function combineLatest<O extends ObservableInput<any>, R>(...observables: Array<ObservableInput<any> | ((...values: Array<any>) => R)>): Observable<R>;
+
+/** @deprecated resultSelector no longer supported, pipe to map instead */
+export function combineLatest<O extends ObservableInput<any>, R>(array: O[], resultSelector: (...values: ObservedValueOf<O>[]) => R, scheduler?: SchedulerLike): Observable<R>;
+
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<O extends ObservableInput<any>>(...observables: Array<O | SchedulerLike>): Observable<any[]>;
+
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<O extends ObservableInput<any>, R>(...observables: Array<O | ((...values: ObservedValueOf<O>[]) => R) | SchedulerLike>): Observable<R>;
+
+/** @deprecated Passing a scheduler here is deprecated, use {@link subscribeOn} and/or {@link observeOn} instead */
+export function combineLatest<R>(...observables: Array<ObservableInput<any> | ((...values: Array<any>) => R) | SchedulerLike>): Observable<R>;
+/* tslint:enable:max-line-length */
+
+/**
+ * Combines multiple Observables to create an Observable whose values are
+ * calculated from the latest values of each of its input Observables.
+ *
+ * <span class="informal">Whenever any input Observable emits a value, it
+ * computes a formula using the latest values from all the inputs, then emits
+ * the output of that formula.</span>
+ *
+ * 
+ *
+ * `combineLatest` combines the values from all the Observables passed as
+ * arguments. This is done by subscribing to each Observable in order and,
+ * whenever any Observable emits, collecting an array of the most recent
+ * values from each Observable. So if you pass `n` Observables to operator,
+ * returned Observable will always emit an array of `n` values, in order
+ * corresponding to order of passed Observables (value from the first Observable
+ * on the first place and so on).
+ *
+ * Static version of `combineLatest` accepts either an array of Observables
+ * or each Observable can be put directly as an argument. Note that array of
+ * Observables is good choice, if you don't know beforehand how many Observables
+ * you will combine. Passing empty array will result in Observable that
+ * completes immediately.
+ *
+ * To ensure output array has always the same length, `combineLatest` will
+ * actually wait for all input Observables to emit at least once,
+ * before it starts emitting results. This means if some Observable emits
+ * values before other Observables started emitting, all these values but the last
+ * will be lost. On the other hand, if some Observable does not emit a value but
+ * completes, resulting Observable will complete at the same moment without
+ * emitting anything, since it will be now impossible to include value from
+ * completed Observable in resulting array. Also, if some input Observable does
+ * not emit any value and never completes, `combineLatest` will also never emit
+ * and never complete, since, again, it will wait for all streams to emit some
+ * value.
+ *
+ * If at least one Observable was passed to `combineLatest` and all passed Observables
+ * emitted something, resulting Observable will complete when all combined
+ * streams complete. So even if some Observable completes, result of
+ * `combineLatest` will still emit values when other Observables do. In case
+ * of completed Observable, its value from now on will always be the last
+ * emitted value. On the other hand, if any Observable errors, `combineLatest`
+ * will error immediately as well, and all other Observables will be unsubscribed.
+ *
+ * `combineLatest` accepts as optional parameter `project` function, which takes
+ * as arguments all values that would normally be emitted by resulting Observable.
+ * `project` can return any kind of value, which will be then emitted by Observable
+ * instead of default array. Note that `project` does not take as argument that array
+ * of values, but values themselves. That means default `project` can be imagined
+ * as function that takes all its arguments and puts them into an array.
+ *
+ * ## Examples
+ * ### Combine two timer Observables
+ * ```ts
+ * import { combineLatest, timer } from 'rxjs';
+ *
+ * const firstTimer = timer(0, 1000); // emit 0, 1, 2... after every second, starting from now
+ * const secondTimer = timer(500, 1000); // emit 0, 1, 2... after every second, starting 0,5s from now
+ * const combinedTimers = combineLatest(firstTimer, secondTimer);
+ * combinedTimers.subscribe(value => console.log(value));
+ * // Logs
+ * // [0, 0] after 0.5s
+ * // [1, 0] after 1s
+ * // [1, 1] after 1.5s
+ * // [2, 1] after 2s
+ * ```
+ *
+ * ### Combine an array of Observables
+ * ```ts
+ * import { combineLatest, of } from 'rxjs';
+ * import { delay, starWith } from 'rxjs/operators';
+ *
+ * const observables = [1, 5, 10].map(
+ * n => of(n).pipe(
+ * delay(n * 1000), // emit 0 and then emit n after n seconds
+ * startWith(0),
+ * )
+ * );
+ * const combined = combineLatest(observables);
+ * combined.subscribe(value => console.log(value));
+ * // Logs
+ * // [0, 0, 0] immediately
+ * // [1, 0, 0] after 1s
+ * // [1, 5, 0] after 5s
+ * // [1, 5, 10] after 10s
+ * ```
+ *
+ *
+ * ### Use project function to dynamically calculate the Body-Mass Index
+ * ```ts
+ * import { combineLatest, of } from 'rxjs';
+ * import { map } from 'rxjs/operators';
+ *
+ * const weight = of(70, 72, 76, 79, 75);
+ * const height = of(1.76, 1.77, 1.78);
+ * const bmi = combineLatest(weight, height).pipe(
+ * map(([w, h]) => w / (h * h)),
+ * );
+ * bmi.subscribe(x => console.log('BMI is ' + x));
+ *
+ * // With output to console:
+ * // BMI is 24.212293388429753
+ * // BMI is 23.93948099205209
+ * // BMI is 23.671253629592222
+ * ```
+ *
+ * @see {@link combineAll}
+ * @see {@link merge}
+ * @see {@link withLatestFrom}
+ *
+ * @param {ObservableInput} observable1 An input Observable to combine with other Observables.
+ * @param {ObservableInput} observable2 An input Observable to combine with other Observables.
+ * More than one input Observables may be given as arguments
+ * or an array of Observables may be given as the first argument.
+ * @param {function} [project] An optional function to project the values from
+ * the combined latest values into a new value on the output Observable.
+ * @param {SchedulerLike} [scheduler=null] The {@link SchedulerLike} to use for subscribing to
+ * each input Observable.
+ * @return {Observable} An Observable of projected values from the most recent
+ * values from each input Observable, or an array of the most recent values from
+ * each input Observable.
+ */
+export function combineLatest<O extends ObservableInput<any>, R>(
+ ...observables: (O | ((...values: ObservedValueOf<O>[]) => R) | SchedulerLike)[]
+): Observable<R> {
+ let resultSelector: (...values: Array<any>) => R = null;
+ let scheduler: SchedulerLike = null;
+
+ if (isScheduler(observables[observables.length - 1])) {
+ scheduler = observables.pop() as SchedulerLike;
+ }
+
+ if (typeof observables[observables.length - 1] === 'function') {
+ resultSelector = observables.pop() as (...values: Array<any>) => R;
+ }
+
+ // if the first and only other argument besides the resultSelector is an array
+ // assume it's been called with `combineLatest([obs1, obs2, obs3], resultSelector)`
+ if (observables.length === 1 && isArray(observables[0])) {
+ observables = observables[0] as any;
+ }
+
+ return fromArray(observables, scheduler).lift(new CombineLatestOperator<ObservedValueOf<O>, R>(resultSelector));
+}
+
+export class CombineLatestOperator<T, R> implements Operator<T, R> {
+ constructor(private resultSelector?: (...values: Array<any>) => R) {
+ }
+
+ call(subscriber: Subscriber<R>, source: any): any {
+ return source.subscribe(new CombineLatestSubscriber(subscriber, this.resultSelector));
+ }
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+export class CombineLatestSubscriber<T, R> extends OuterSubscriber<T, R> {
+ private active: number = 0;
+ private values: any[] = [];
+ private observables: any[] = [];
+ private toRespond: number;
+
+ constructor(destination: Subscriber<R>, private resultSelector?: (...values: Array<any>) => R) {
+ super(destination);
+ }
+
+ protected _next(observable: any) {
+ this.values.push(NONE);
+ this.observables.push(observable);
+ }
+
+ protected _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, observable, i));
+ }
+ }
+ }
+
+ notifyComplete(unused: Subscriber<R>): void {
+ if ((this.active -= 1) === 0) {
+ this.destination.complete();
+ }
+ }
+
+ notifyNext(outerValue: T, innerValue: R,
+ outerIndex: number, innerIndex: number,
+ innerSub: InnerSubscriber<T, R>): void {
+ 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());
+ }
+ }
+ }
+
+ private _tryResultSelector(values: any[]) {
+ let result: any;
+ try {
+ result = this.resultSelector.apply(this, values);
+ } catch (err) {
+ this.destination.error(err);
+ return;
+ }
+ this.destination.next(result);
+ }
+}
projects / dotfiles / .git / blobdiff