面试题与答案

Example:

const observable = new Observable(observer => { observer.next('Hello'); });

Example:

const observable = new Observable(observer => { observer.next('First'); observer.next('Second'); });

Example:

const observer = { next: value => console.log(value), error: err => console.error(err), complete: () => console.log('Completed') };

Example:

const pluckedObservable = sourceObservable.pipe(pluck('name'));

Example:

const distinctObservable = observable.pipe(distinctUntilChanged());

Example:

const intervalObservable = interval(1000);

Example:

const takenObservable = observable.pipe(take(3));