How to use the forkJoin function from rxjs
Find comprehensive JavaScript rxjs.forkJoin code examples handpicked from public code repositorys.
rxjs.forkJoin is an operator in RxJS that combines multiple observables and waits for them all to complete before emitting their last emitted values as an array.
172 173 174 175 176 177 178 179 180 181rxop.reduce((acc, r) => acc.concat(r), []), rxop.tap(() => demo.cancel()), rxop.catchError((e) => console.error(e)), ); }); return forkJoin(parsers).pipe( rxop.map(results => ({ results, UNPARSED_DEMOS_BATCH, demoBatchIdx,
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2GitHub: caosbad/api
46 47 48 49 50 51 52 53 54 55exports.bindNodeCallback = rxjs.bindNodeCallback; exports.combineLatest = rxjs.combineLatest; exports.concat = rxjs.concat; exports.defer = rxjs.defer; exports.empty = rxjs.empty; exports.forkJoin = rxjs.forkJoin; exports.from = rxjs.from; exports.fromEvent = rxjs.fromEvent; exports.fromEventPattern = rxjs.fromEventPattern; exports.generate = rxjs.generate;
29901How does rxjs.forkJoin work?
rxjs.forkJoin is an operator in RxJS that takes multiple source observables and waits until all of them have emitted at least one value before subscribing to them. Once all the source observables complete, it emits an array of the last emitted value from each source observable. If any of the source observables throws an error, forkJoin will immediately terminate and emit an error. If the source observables emit values at different times, forkJoin will wait until all of them have emitted at least one value before emitting an array of their last emitted values. If any source observable completes before all the others have emitted a value, forkJoin will hold on to the emitted value until it receives a value from all other source observables or until they complete. forkJoin can also accept an object instead of an array of observables, where the keys of the object will be used to construct the resulting array. In this case, the object values should be observables. forkJoin will only emit a value once, so it's not suitable for observing changes to the source observables over time. It's best used when you want to wait for multiple observables to complete before performing a task that requires their results.
GitHub: openforis/sepal
197 198 199 200 201 202 203 204 205 206return { getImage$: function () { return ccdc$.pipe( switchMap(({ccdc}) => forkJoin({ segmentsImage: ccdc.getImage$(), geometry: ccdc.getGeometry$() }).pipe( switchMap(({segmentsImage, geometry}) => getObservations$(geometry).pipe(
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578 579 580 581 582 583 584 585 586 587} } textbookLevelContentMetrics(collectedData) { return new Promise((resolve, reject) => { forkJoin(..._.map(collectedData, data => this.getProgramDetails(data.program_id))).subscribe(details => { try { const contentTypes = details.length ? _.uniq(_.compact(..._.map(details, (model) => { if (model && (!_.isEmpty(model.dataValues.content_types))) return model.content_types
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Ai Example
1 2 3 4 5 6 7 8 9 10 11import { forkJoin, of } from "rxjs"; import { delay } from "rxjs/operators"; const observable1$ = of("Hello").pipe(delay(3000)); const observable2$ = of("RxJS!").pipe(delay(1000)); const forkJoin$ = forkJoin([observable1$, observable2$]); forkJoin$.subscribe(([res1, res2]) => { console.log(`${res1} ${res2}`); });
In this example, we create two observables observable1$ and observable2$ that each emit a string after a specified delay using the delay operator. We then pass an array containing these observables to the forkJoin function, which returns a new observable forkJoin$. When we subscribe to forkJoin$, we use array destructuring to extract the results of the two observables in the array passed to forkJoin. In this case, the result of observable2$ is emitted first, and the result of observable1$ is emitted after a longer delay. Once both observables have emitted their values, the forkJoin$ observable emits an array containing both values, and we log the concatenated string to the console.
182 183 184 185 186 187 188 189 190 191const tasks = lines.map(l => { return of(createLineObj(l)).pipe( concatMap(line => { return forkJoin([ getVehicleDescriptionByPlateID(line.PLATE_ID, pgClient), getViolationByViolationCode(line.VIOLATION_CODE, pgClient), getTicketBySummonsNumberAndYear(line.SUMMONS_NUMBER, line.YEAR, pgClient) ]).pipe(
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83 84 85 86 87 88 89 90 91 92takeUntil(gameEnds$), reduce((acc, v) => acc.concat(v), []), ); }); forkJoin(parsers$).subscribe( results => { let allGrenades = results.reduce((acc, r) => acc.concat(r), []); let data = _.mapValues(_.groupBy(allGrenades, 'type'), gs => gs.map(g => {
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631 632 633 634 635 636 637 638 639 640"timestamp": 1, "requestedFeatures": 1, "pickUp": 1, "dropOff": 1, "tripCost": 1, "verificationCode": 1, "fareDiscount": 1, "fare": 1, "state": 1, "tip": 1, "client": 1, "driver": 1, "businessId": 1, "shiftId": 1, "request": 1 }) ), mergeMap(dbService => forkJoin( of(dbService), this.payClientAgreement$(dbService, timestamp, aid, av), //this.payPlatformClientAgreement$(dbService, timestamp), this.payAppClientAgreement$(dbService, timestamp, aid, av),
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176 177 178 179 180 181 182 183 184 185$call.push(build.maximo(xmls, dir, path)); } else { $call.push(build.tfjs(xmls, dir, path)); } }) forkJoin($call) .subscribe((data) => { writeFileSync(`${path}/train/labels.csv`, data[0]); writeFileSync(`${path}/test/labels.csv`, data[1]); console.log('generating label.csv for train and test');
000266 267 268 269 270 271 272 273 274 275//writeFileSync(`${path}/labels/${label}`, txt) //copyFileSync(`${path}/${filename}`, `${path}/images/${filename}`) $save[label] = new Observable((obs) => {writeFile(`${path}/labels/${label}`, txt, (err) => {obs.next('done'); obs.complete();})}) $save[filename] = new Observable((obs) => {copyFile(`${path}/${filename}`, `${path}/images/${filename}`, err => {obs.next('done'); obs.complete();})}) }) forkJoin($save) .subscribe({ next: (save) => console.log(Object.keys(save).length), complete: () => { observer.next()
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163 164 165 166 167 168 169 170 171 172const apmPositionElements = apmTrans === null || apmTrans === void 0 ? void 0 : apmTrans.startSpan('position-elements', 'correction'); // position panel elements for print layout await ((_layout$positionEleme = layout.positionElements) === null || _layout$positionEleme === void 0 ? void 0 : _layout$positionEleme.call(layout, driver, logger)); apmPositionElements === null || apmPositionElements === void 0 ? void 0 : apmPositionElements.end(); await (0, _wait_for_render.waitForRenderComplete)(this.timeouts.loadDelay, driver, layout, logger); }).pipe((0, _operators.mergeMap)(() => Rx.forkJoin({ timeRange: (0, _get_time_range.getTimeRange)(driver, layout, logger), elementsPositionAndAttributes: (0, _get_element_position_data.getElementPositionAndAttributes)(driver, layout, logger), renderErrors: (0, _get_render_errors.getRenderErrors)(driver, layout, logger) })), this.waitUntil(this.timeouts.renderComplete));
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