User.ts

import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';
import 'rxjs/add/observable/of';

class User {
	userObservable() {
		return Observable.of([{name: 'Iparra'}])
			.map(user => user[0])
			.catch(error => Observable.throw(err));
	}
}

let user = new User();
let userObservable = user.userObservable();
userObservable.subscribe(
	result => {
		console.log(result); //[{name: 'Iparra'}]
	},
	error => {
		console.log(error);
	}
);