how to use the from function from the rxjs library in typescript

index.ts
import { from } from 'rxjs';

// Convert an array into an Observable
const myArray = [1, 2, 3];
const myObservable = from(myArray);

// Convert a Promise into an Observable
const myPromise = Promise.resolve('Hello World!');
const myPromiseObservable = from(myPromise);

// Convert an iterable into an Observable
const myIterable = 'Hello';
const myIterableObservable = from(myIterable);

// Subscribe to and log the values emitted from the Observables
myObservable.subscribe(value => console.log(value));
myPromiseObservable.subscribe(value => console.log(value));
myIterableObservable.subscribe(value => console.log(value));
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