CODEWITHSUNDEEP
rxjs
TheAnonymousModeIT
TheAnonymousModeIT

Reputation: 923

Types for observable

I would like to have an type for my observable (just for learning purposes). How can I do it for the follwoing lines of code? I get compiler errors and don't understand them.

type Color = "white" | "green" | "red" | "blue";
type Logo = "fish" | "dog" | "bird" | "cow";

const color$ = new Subject<Color>();
const logo$ = new Subject<Logo>();

const observabl1:<Subject<Color>, Subject<Logo>> = combineLatest([color$, logo$]);

observabl1.subscribe(([color, logo]) =>
  console.log(`${color} ${logo}`)
);

and

const observable2$:Observable<string> = from(["white", "green", "red", "blue"]);

enter image description here

Update: I found the error. I imported import { Observable } from 'rx'; Changing it to import { Observable } from 'rxjs'; fixed the problem

Upvotes: 0

Views: 30

Answers (1)

MoxxiManagarm
MoxxiManagarm

Reputation: 9124

I get compiler errors and don't understand them

Kindly provide the errors you want to discuss.

const observabl1:<Subject, Subject> = combineLatest([color$, logo$]);

combineLatest provides a stream with an array of the data.

const observabl1: Observable<[Color, logo]> = combineLatest([color$, logo$]);

Upvotes: 1

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