How to use the merge function from rxjs
Find comprehensive JavaScript rxjs.merge code examples handpicked from public code repositorys.
rxjs.merge is an RxJS operator that combines multiple source observables into a single observable.
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const exec = (cmd, args) => { // Use `Observable` support if merged https://github.com/sindresorhus/execa/pull/26 const cp = execa(cmd, args); return merge( streamToObservable(cp.stdout.pipe(split()), {await: cp}), streamToObservable(cp.stderr.pipe(split()), {await: cp}) ).pipe(filter(Boolean)); };
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const scriptGrep = require('./plugin-release/script-grep') const exec = (cmd, args) => { const cp = execa(cmd, args) return merge(streamToObservable(cp.stdout.pipe(split())), streamToObservable(cp.stderr.pipe(split())), cp).pipe(filter(Boolean)) } const buildDeleteCommands = async (pluginId = '', currentVersion = '') => { const deleteCommands = []
How does rxjs.merge work?
rxjs.merge is an operator in the RxJS library that combines multiple observables into a single observable, emitting values from each observable in the order they are subscribed to, and completing only when all the merged observables complete. It is similar to the Promise.all method in JavaScript.
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} commands.map(command => command.close.pipe( take(this.tries), takeWhile(({ exitCode }) => exitCode !== 0) )).map((failure, index) => Rx.merge( // Delay the emission (so that the restarts happen on time), // explicitly telling the subscriber that a restart is needed failure.pipe(delay(this.delay, this.scheduler), mapTo(true)), // Skip the first N emissions (as these would be duplicates of the above),
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retryWhenStream$.subscribe( data => console.log('retry when stream', data), err => console.error('retry when error', err) ) const streamCombined$ = merge( throwError('error'), // of(1,2,3), of(4,5,6), of(7,8,9) );
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Ai Example
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import { merge, interval } from "rxjs"; import { mapTo } from "rxjs/operators"; const observable1 = interval(1000).pipe(mapTo("First")); const observable2 = interval(2000).pipe(mapTo("Second")); const observable3 = interval(3000).pipe(mapTo("Third")); merge(observable1, observable2, observable3).subscribe((value) => console.log(value) );
In this example, rxjs.merge is used to combine three observables (observable1, observable2, and observable3) into a single observable. The interval operator is used to create an observable that emits values at regular intervals. The mapTo operator is used to map each emitted value to a string that identifies the observable. The merge function is then called with the three observables as arguments, and the resulting observable is subscribed to. When the merged observable emits a value, the value is logged to the console. The output will be a sequence of strings (First, Second, Third) that correspond to the observable that emitted the value.
GitHub: langhuihui/rx4rx
![langhuihui profile picture](/langhuihui.png?size=40)
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filter, scan } = rxOp var inc = source.pipe(filter(isPositive), map(returnPlus1)); var dec = source.pipe(filter(isNegative), map(returnMinus1)); var count = rxjs.merge(inc, dec).pipe(scan(addXY, 0)); var label = rxjs.of('initial', 'Count is '); var view = rxjs.combineLatest(label, count).pipe(map(renderWithArgs)); runners.runRx6(deferred, view); }, options)
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GitHub: lpaolini/AccentaG4
![lpaolini profile picture](/lpaolini.png?size=40)
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callback(buffer.toString('binary')) ) const mergeHeartbeat = (heartbeatDelay, heartbeatValue) => observable$ => merge( observable$, timer(heartbeatDelay, heartbeatDelay).pipe( mapTo(heartbeatValue) )
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), shareReplay() ) this.unhandledBookings = new Subject() this.manualDispatchedBookings = new Subject() this.dispatchedBookings = merge( this.manualDispatchedBookings, dispatch(this.cars, this.unhandledBookings) ).pipe(share()) }
GitHub: USU-Robosub/submarine
![USU-Robosub profile picture](/USU-Robosub.png?size=40)
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const command = { ...Command().action( (system, scheduler) => base.pipe( take(1), mergeMap(() => { return merge(...commands.map(command => { const instance = scheduler.run(command) if(instance.lockingFailed){ throw Error(instance) }
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topic: toAscii(result.topic) }))); const obsErr = fromEvent(emitter, 'error').pipe(mergeMap(throwError)); const obsSub = merge(obsData, obsErr); obsSub.shhSubscription = emitter; return obsSub; }
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GitHub: jeffbski/wait-on
![jeffbski profile picture](/jeffbski.png?size=40)
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} logWaitingForWDeps(resources); const resourcesCompleted$ = combineLatest(resources.map(createResourceWithDeps$)); merge(timeoutError$, resourcesCompleted$) .pipe(takeWhile((resourceStates) => resourceStates.some((x) => !x))) .subscribe({ next: (resourceStates) => { lastResourcesState = resourceStates;
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scan((acc, taxi) => acc.push(taxi) && acc, []), debounceTime(1000), tap((cars) => info('region taxis', cars.length)), filter((taxis) => taxis.length > 0), mergeMap((taxis) => merge(this.manualBookings, this.unhandledBookings).pipe( bufferTime(5000, null, 100), filter((bookings) => bookings.length > 0), tap((bookings) => info('Clustering taxi bookings', bookings.length, taxis.length)
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share() ) experiment.passengerUpdates = experiment.passengers.pipe( mergeMap(({ deliveredEvents, pickedUpEvents }) => merge(deliveredEvents, pickedUpEvents) ), catchError((err) => error('passengerUpdates', err)), share() )
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return {winner}; }), ); const roundEnds$ = merge(roundEndsWinner$, roundEndsOfficiallyWinner$); const get1vN = (rsh, winner) => { const ts = sh => (sh && sh.T && sh.T.length) || 0; const cts = sh => (sh && sh.CT && sh.CT.length) || 0;
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GitHub: hatchapp/game-server
![hatchapp profile picture](/hatchapp.png?size=40)
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const move$ = fromEvent(ring, 'move'); const err$ = fromEvent(ring, 'error').pipe( mergeMap((err) => throwError(err)) ); return merge(move$, err$); } async function main(){ // pick the strategy to choose swim base finding strategy
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GitHub: openforis/sepal
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messageKey: 'tasks.status.canceled' }) task$.pipe( mergeMap(task => { const taskCancellation$ = merge( cancel$.pipe( filter(id => id === task.id), tap(() => log.debug(msg(task.id, 'cancelled by user'))), ),
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.pipe(reduce((a, b) => a + b.population, 0)) .toPromise(), packageVolumes: packageVolumes.find((e) => name.startsWith(e.name)), commercialAreas: commercialAreas, unhandledBookings: name.startsWith('Helsingborg') ? merge(bookings.hm, bookings.ikea) : of(), citizens, }) return kommun
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.pipe( tap(() => console.log(GRENADE_SHORT.DECOY)), map(e => formatGrenade(GRENADE_SHORT.DECOY, e)), ); const grenades$ = merge(hes$, flashbangs$, smokes$, molotovs$, decoys$); demo.parse(fs.readFileSync(DEMO_FILE)); return grenades$.pipe(
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return observable.pipe(operators.successOp, operators.errorOp); }; var createMultiAjaxObservable = function createMultiAjaxObservable(ajax, ajaxConfigs, operators, action, ajaxBodyCreator, ajaxRequestInjector) { var observables = transformRequests(ajax, ajaxConfigs, action, ajaxBodyCreator, ajaxRequestInjector); if ((0, _typeUtil.exists)(operators.takeUntilOp)) { return _rxjs.merge.apply(void 0, _toConsumableArray(observables)).pipe(operators.successOp, operators.errorOp, operators.takeUntilOp); } return _rxjs.merge.apply(void 0, _toConsumableArray(observables)).pipe(operators.successOp, operators.errorOp); }; var createForkJoinAjaxObservable = function createForkJoinAjaxObservable(ajax, ajaxConfigs, operators, action, ajaxBodyCreator, ajaxRequestInjector) {
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GitHub: lbovet/makine
![lbovet profile picture](/lbovet.png?size=40)
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body: (constant) => constant ? () => of({ body: constant }) : body => of({ body }) }, serve: (port) => (...pipeline) => merge(start(port).pipe(skip(1)), ...pipeline).pipe( catchError((err, caught) => (console.error(err), caught)) ), start, stop : () => server.close()
GitHub: caosbad/api
![caosbad profile picture](/caosbad.png?size=40)
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exports.fromEvent = rxjs.fromEvent; exports.fromEventPattern = rxjs.fromEventPattern; exports.generate = rxjs.generate; exports.iif = rxjs.iif; exports.interval = rxjs.interval; exports.merge = rxjs.merge; exports.never = rxjs.never; exports.of = rxjs.of; exports.onErrorResumeNext = rxjs.onErrorResumeNext; exports.pairs = rxjs.pairs;