Observable Questions

I get the following error when i try to pass the authorized idtoken as a string when making http requests to firebase:

Using angular 4, i am getting array list from firebase db inside an observable. how to change the type of an observable to an array or vice versa

I am trying to learn how to use react with redux in a typescript environment. i am using the patterns suggested at

I need help with the following function: getuser(uuid: string): observable<wowuserdatamodel> { let user:

Just an example for my issue:- parent have child1 and child2. i am showing a list of months in an array, onload of child2. on

I have angular2 reactive form which contains md-select to make user select doctor from firebase md-select works fine when data exists before

What is the best way to pass data from an http request to another component. i have programmed a user service here, which receives information

I am using this request to get my documents from firestore asynchronously. during an operation (delete for example) the list of my

Basically i want to do this. projectservice: privatefolderref =

I have a cross-platform app on xamarin forms for android and ios. in some view, i am using an observablecollection as source of a

I am having a problem displaying the "displayname" property from my component.ts file (for testing purposes in console.log), yet it works fine

I am new with reac-redux, i am trying to get collection from firestore but now when firebase returns the data and i try to map the info to storage

This is my epic at the moment export const listentonewdataadded = (action$, store) => action$.pipe(

I want to conncet to server with retrofit and rxjava.it works when i used call and everything is good.but when try to use rxjava ,its getsinto

I am using async pipe in my template for an observable: applicants$: observable<userprofile[]>; ngoninit() {

I'm building an angular app with ngrx and i'm encountering a problem. here it is: in the oninit, i launch dispatch and selector for

Lets say i have an observable that emits employees. $employees i wish to manipulate a sub property of each employee

I have angular 8 application. and i have two components, like child - parent relationship. so i remove the item from the child, but then

I found this article that explains how i can use rxjs to create an observable for auto-complete:

I'm trying to write a service that accesses the spotify api. therefore this services needs an authorization bearer token. it should get this from

Following is my code for adding observable to composite disposable

Hi i am building an angular application with @angular/fire. in the auth service i have a user observable which gets the value of the current user,

I develop a rss reader android app. i want to api call more than one but i can't. my code is here, what am i doing wrong ? note;

I have an observable for api request, basically i added retrywhen in the event connection failed/error. while doing so i want to

I want to transform an observable into a table. i can display a table by searching on the zero line but i would like to browse all the rows to

I'm starting to use angular and i would need help to solve this problem. i'm using a firestore database.

I have this bit of code that is intended to accumulate features as they are added ot the features$$ observable. private

I have redux observable epic that maps ajax response to single action ("createsuccess"): export const create = (action$)

Background most examples of fetching data from firebase's firestore via angularfire: (a) show the use of

After the user clicks the login button on a form, i want to dispatch an action which will trigger a spinner on the form while the request

I have a little probleme, i use the node(express) and angular, i want display all classes in angular but it's show an error like this

I have difficulties to grasp the way things works with observables. i'm developing an api that retrieves a "person" who'll have multiple

How i can notify on multiple variables update? is there any method to detect and separatenotifyobservers? public class

Please i'm using a model name resproject and variable resproject : observable ; this is my code : import { component }

I have web app,developed using angular 6 and google-clod-firestore,which take order from customer to deliver books;currently it have two

I have some code that sends data to firebase, waits for a response, then displays the result to the user: sendrequest (data):

I need run a function if neither the mouse has moved, nor the keyboard has been touched for 1mn. i tried the code below but doesn't seem to

In my android app i would like to use rxjava2 instead of asynctasks to query my local sqlite db. i don't want to use room or

I want to show a message or hide spinner when the observable is complete but firestore observable is endless i guess. in other words it's "hot" as

I'm trying to handle http redirection status codes (e.g. 302 redirect when the session timed out) and i don't know if there is a generic way to

I am using angular6 and cloud firestore (not realtime database). i have a service which holds a function which adds a document to a collection and

I have the following code getfileasync(fieldfiles: array<filefields>): observable<array<uploadfile>> {

I am facing with an error which is unclear for me. i am able to see the data to edit but everytime it is coming an error like this. i have tried

How on earth do you return an observable of (ex type user) from an on-change function in firebase. normally you can just do a .then but this

Following is a simplified example of a problem that i'm trying to tackle. in my code base, the problem is occurring with a publishsubject but

I am trying to check the validity of a function i have written in typescript, in congruence with rxjs observables, that fetches some bookings from

I have an epic which should proceed few actions of type verify_insurance_request in a row. everything works good inside switchmap block (all items

I currently trying to create a function which should be triggered in my react component when my observable in my store is changed (i'm using

@component({ selector: 'app-geo', templateurl: <img mat-card-image [src]="profileurl | async "> export class geocomponent

At this moment i'm using subject from rxjs without any problem, simple example: service rooms: room[] = [];

Chat.service.ts: getuserchats(): observable<chat[]> { return this.auth.curruser .pipe( take(1),

I hava angular 8 application and i am using material. what i want to archieve is that data from the backend will be populated in a

I am trying to implement ts epic function, but "action$" need to have some implicit type that differs for , i could not find working example of

I have a problem with inner observables. const wordscollection = this.db.collection('words').valuechanges(); return

I am newbie trying out rxjs and nestjs. the use case that i am currently trying to accomplish is for educational purpose. so i wanted to read a

I am trying a use case of reading a json file asynchronously and sending it out as a response (as a rxjs observable data). here is the service

Something that i didn't completely understand about the get package is whether it is always required to put the observable variables in a

I have built a spa with riot.js that visualizes data that is received by a proprietary messaging system. in order to make the tags react to

I am trying to refactor customised api get, like this: get( route: string, responsetype: resptype = 'json', fullresponse: boolean

I am trying to use observable with regular javascript. followed instructions from here:

In my nest.js project i do a get request to a open api. if there is no result from the api i get http status 400. in that case i want to return a

My desired behaviour: run http request immediately look up data in async cache if cache has the value before http

I have a time slider that trigger action to filter data every change this.selecteddate$ .pipe( switchmap(elm => {

I have 3 different services a,b,c. these services produce each a different json. json from service a has properties which values need to be

Tldr; i have a promise collection().add() which resolves to an object documentreference with a listener

I'm trying to do a verification in two fields, email and password, using mobx, and i'm computing the result of two functions, in

I have an application where i'm using the angular cdk stepper and i'm trying to share data between a common grandchild component in both of the

I'm implementing an epic for a backend call. the response doesn't get handled as expected. for my implementation i'm using these

Can anyone help me with this? i can't understand why this code console logs 0. thanks const button =

My project never update for 6 months (written by someone & last build was successful), but today i want to update it but face some errors:

I have two observers that are merged with a flatmap. the first observer returns a value that is used when the second is called.

I am creating a web app using react and redux observables and i would like to create a unit test for the timeout scenario of one of my epics.

I've used angular cli 6 and firebase. i have two classes for interfaces: pps and ppsplan. export class pps { constructor (

Angular firebase: i have a function that sets a value to photon2. i need to get this value out of my getphoton()

I am just trying the behaviorsubject example code from here

Wouldn't it be better to get the difference instead of returning the whole values for the ui to redraw? var collection:

I have a function that should return an observable with a list of conversations. to get that, i have to fetch the user conversations

I'm making my first app on angular. i trying to filter a list of book objects by the gender attribute. i am having difficulty sharing data between

I have one observable that emits values from 0 to 10 for each second. i need to accumulate each two values and print a result of accumulator value

I have an app where questions are shown to users. drafts for the questions are loaded from a sharepoint list. each draft contains a key which is

I am new to reactjs and trying to integrate redux with my existing project. this is my index.js file in

I have a conceptual question. i am using angularfire2 with angular 6, and i am not sure how to handle all the observables. most of my

In my component, i subscribe to a variable like this: import { subject, of } from 'rxjs' .... distance: number constructor() {

I have to make multiple serialise call on server side in nodejs using

I'm using the ws library to create a websocket client to communicate with

In angular, i usually subscribe to a client providing me with an observable of a get call

Before this, i was using firebase as database service, so when i get the observable from firebase and subsribe to it const

I have the issue where i have a protected route that is picked up by the below epic. if the criteria to access the protected route is not met, the

I am developing an iionic 3 - firebase based chat application using firebase realtime database for storing messages, loading them into the app and

I am using firebase realtime database for chat feature in my application, i just need to return an obserable of type any or type message from

I'm pretty much new to firebase and i was going through this course:

I have recently updated firebase and angularfire2 in my ionic project versions: firebase: 5.0.3 angularfire2:

I understand this line of d3 code which adds an svg element to the body of an html page, and stores a reference to the new element in the variable

I use a singleton to access subscription offerings from revenuecat as an @observedobject on various views in the app:

I have this data in mongodb (important field "period" is red border) :

I've got angular2 project connected directly with firebase. the structure of my database is presented in the picture below. so we've got couple of

For example: const s = rxjs.interval(2000).pipe(tap(console.log), sharereplay(1)) const b =

I need to show a toast after an observable is complete, how i can do it, my code is:

Are observables syntax sugar of promises? in what essence they are compiled under the hood?

Asking a very basic rxjava question here because i couldn't find it anywhere else. i'm having this observable in rxjava 2 -