​

function objectFactory (v)

{

  return {a:v,b:v,c:v};

}

​

​

​

​

var obs   = Rx.Observable.from([objectFactory(1),objectFactory(2),objectFactory(3)]) .map(res => {

 res.namedKeys = [];

    for (let el in Object.keys(res)) {

      res.namedKeys.push(el)

    }

    return res

  })

​

 .switchMap(res => Rx.Observable.combineLatest(Rx.Observable.of(res)))

​

​

.subscribe(pos =>

    {

​

​

    console.log(pos)

    });