rxjs5

I am trying to use rxjs 5 to write a Node.js server in TypeScript, but I hit an error when converting fs.readFile to its rxjs form. I expect the following code would work in TypeScript // This is a JavaScript example from the official documentation. It should // also work at the TypeScript envrionment. import * as fs from 'fs'; import { Observable } from 'rxjs'; let readFileAsObservable = Observable.bindNodeCallback(fs.readFile); // This is the line that throws the error. let result = readFileAsObservable('./roadNames.txt', 'utf8'); result.subscribe(x => console.log(x), e => console.error(e));

I use RxJs version 5 within my Angular 2 project. I want to create some observables but I don't want the observables being invoked immediately. In version 4 you could control the invocation with (for example) the Controlled command or Pausable Buffers . But that functionality is not ( yet ) available in version 5. How can I get the this kind of functionality in RxJs 5? My ultimate goal is to queue the created observables and invoke them one by one. The next one is only invoked when the previous one is processed successfully. When one fails, the queue is emptied. EDIT With the the comment of

I have a parent observable that, once it has a subscriber, will do a lookup and emit a single value, then complete. I'd like to convert that into an observable (or behavior subject or whatever works) that does the following: once it has at least one subscriber, it gets the result from the parent observable (once). Then it emits that value to all of its subscribers, and also emits that single value to all future subscribers, when they subscribe. It should continue with this behavior even if its subscriber count drops to zero. It seems like this should be easy. Here is what didn't work: theValue

I am implementing the following functions in Angular2's Component: export class MypageEditComponent { ngOnInit() { this.timer = Observable.timer(100, 100); this.timer.subscribe(t => { this.setFormData(); } private setFormData() { this.editUserAcountType = this.authStore.registerInfo.account_type; this.editAddress = this.authStore.registerInfo.email; this.editUserName = this.authStore.registerInfo.username; } } I want to stop the repeat of Observable.timer once the value is correctly stored with setFormData() . But do not know how, please tell me. There're are basically two ways: call

I have a hot observable fed by a socket. I can use the pausable to pause the socket feed. But once I 'unpause' the observable, I need to display the last values that the socket could have sent while the subscription was paused. I don't want to keep track of the last values the socket sends manually...How could this be pausible? From the example in the documentation, see comments below: var pauser = new Rx.Subject(); var source = Rx.Observable.fromEvent(document, 'mousemove').pausable(pauser); var subscription = source.subscribe( function (x) { //somehow after pauser.onNext(true)...push the