rxjs5 Questions
4
Solved
I am reading the official documentation of RxJS and then I realized they both are doing exactly the same thing.
To me they both seem exactly similar.
Please point out the difference between them if...
3
Solved
As staten in the ionic-angular 3.9.0 release notes (https://github.com/ionic-team/ionic/blob/master/CHANGELOG.md), using the advantages of updating to RXJS 5.5.2 could reduce the bundle size and th...
Thermosiphon asked 9/11, 2017 at 11:18
12
Solved
My service class, before calling a web service, needs to get a property called dataForUpdate from my state. Currently, I'm doing it like this:
constructor(public _store: Store < AppState > ,...
5
Solved
I'm wondering what are the differences between Observable.combineLatest and Observable.forkJoin?
As far as I can see, the only difference is forkJoin expects the Observables to be completed, while ...
13
I dont know how to extract value from Observable to be returned by function in which Observable is present. I need just a value from it to be returned, nothing else.
Current version which works
f...
Borghese asked 10/7, 2016 at 12:18
4
I want to call a function (synchronously) and then use its return value as an initial emission (subsequently chaining some other operators on the resulting observable).
I want to invoke this functi...
Alberthaalberti asked 2/1, 2017 at 19:31
2
Solved
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 whil...
9
Solved
tl;dr: Basically I want to marry Angular's ngOnDestroy with the Rxjs takeUntil() operator. -- is that possible?
I have an Angular component that opens several Rxjs subscriptions.
These need to be ...
Indigestive asked 27/2, 2017 at 16:1
2
I want to use DOM in angular project like this
Rx.DOM.jsonpRequest
but DOM is not available on Rx which Im importing like this
import Rx = require('rxjs');
I also tried to import rxjs dom ...
Intermeddle asked 3/6, 2016 at 6:30
4
Solved
I have to test a function that uses the fromEvent observable function.
Before the upgrade to 'lettable' operators, I was just doing this:
spyOn(Observable, 'fromEvent').and.callFake(mockFromEven...
Eterne asked 24/1, 2018 at 11:3
7
Solved
I'm trying to use forkJoin on two Observables. One of them starts as a stream... If I subscribe to them directly I get a response, forkJoin isn't firing though. Any ideas?
private data$: Observable...
Suki asked 15/3, 2017 at 12:23
7
Solved
If I have a Node js stream, say for example from something like process.stdin or from fs.createReadStream, how can I convert this to be an RxJs Observable stream using RxJs5?
I see that RxJs-Node ...
Ticktock asked 8/1, 2017 at 20:27
5
Solved
I've been trying to get a draggable div working using Angular 2. I'm using this example from the angular2-examples repo as a starting point, only really adjusting the code to account for the remova...
Cohby asked 29/3, 2016 at 1:14
4
Solved
I have the following code inside my constructor:
this.searchResults = this.searchTerm.valueChanges
.debounceTime(500)
.distinctUntilChanged()
.switchMap(term => this.apiService.search({
lim...
Dory asked 20/2, 2017 at 0:19
6
Solved
My backend frequently returns data as an array inside an RxJS 5 Observable (I'm using Angular 2).
I often find myself wanting to process the array items individually with RxJS operators and I do s...
8
Solved
I am using ngrx/effects.
How can I dispatch an empty action?
This is how I am doing now:
@Effect() foo$ = this.actions$
.ofType(Actions.FOO)
.withLatestFrom(this.store, (action, state) => ...
Sped asked 29/9, 2016 at 5:7
11
When trying to extend a class from a class in a node_modules the typescript compiler throws a error saying:
Property 'source' is protected but type 'Observable<T>' is not a class derived fr...
Capet asked 3/7, 2016 at 9:30
2
Solved
I am moving from the Promise world to the Observable world. One thing I usually do with Promise is to chain a series of tasks and make them run in sequence. For example, I have three tasks: printLo...
4
Solved
How to tell the version of the installed RxJS from the code? For example:
var Rx = require('rxjs/Rx');
console.log(Rx.rev); // undefined
console.log(Rx.version); // undefined
Second question: Ho...
Cini asked 23/9, 2016 at 15:19
2
Solved
I have some trouble to understand this. When I use the switchMap operator with an Observable it emits all the values as expected:
Observable.from([1, 2, 3, 4, 5])
.do(console.log)
.switchMap(i =...
Bricabrac asked 17/2, 2018 at 16:32
2
Solved
I run tsc on my project, and I get these errors relating to the RxJS5 lib:
$ tsc
node_modules/rxjs/observable/FromEventObservable.d.ts(11,39): error TS2304: Cannot find name 'EventTarget'.
node_mo...
Gnathion asked 18/4, 2018 at 18:15
4
I'm trying to use RxJS for a simple short poll. It needs to make a request once every delay seconds to the location path on the server, ending once one of two conditions are reached: either the cal...
Quartas asked 2/3, 2016 at 20:48
4
Solved
My goal is to create an animation loop à la requestAnimationFrame so that I could do something like this:
animationObservable.subscribe(() =>
{
// drawing code here
});
I tried this code as ...
Dialyse asked 24/1, 2017 at 1:59
4
Solved
I am wondering what is the use of asObservable:
As per docs:
An observable sequence that hides the identity of the
source sequence.
But why would you need to hide the sequence?
2
Solved
I'm learning RxJS and Angular 2. Let's say I have a promise chain with multiple async function calls which depend on the previous one's result which looks like:
var promiseChain = new Promise((re...
Brickyard asked 12/6, 2016 at 7:42
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