q.all for angular2 observables

Angular < 6:

import {Observable} from 'rxjs/Observable';
    ...
    return Observable.forkJoin(
        this.http.get('someurl'),
        this.http.get('someotherurl'));

Angular >= 6:

import {forkJoin} from 'rxjs';
...
return forkJoin(
    this.http.get('someurl'),
    this.http.get('someotherurl'));

You will need the .forkJoin operator for that

Observable.forkJoin([observable1,observable2])
       .subscribe((response) => {
          console.log(response[0], response[1]);
       });

You can import the Observable with;

import {Observable} from 'rxjs/Rx';