Zip - combine stream of Objects

YuleBallDance.java

 //It's zip-yOsa not zip-yosAR 
  Observable<DanceCouple> getYuleDanceCoupleObservable() {
      Observable<Champion> championsObservable = getChampionsObservable();
      Observable<Partner> partnerObservable = getPartnerObservable();
      return championsObservable.zipWith(partnerObservable, new Func2<Champion, Partner, DanceCouple>() {
          @Override
          public DanceCouple call(Champion champion, Partner partner) {
              return new DanceCouple(champion, partner).dance();
          }
      });
  }
    
  Observable<Champion> getChampionsObservable() {
      Champion[] champions = {
              new Champion("Viktor Krum"),
              new Champion("Fleur"),
              new Champion("Cedric"),
              new Champion("Harry Potter")
      };
      return Observable.from(champions);
  }

  Observable<Partner> getPartnerObservable() {
      Partner[] partners = {
            new Partner("Hermione"),
            new Partner("Roger"),
            new Partner("Cho"),
            new Partner("Parvati")
      };
      return Observable.from(partners);
  }