ngOnInit() {
     console.log(20, this.repoName);
     let ref = this._fireBase.connect().child(this.repoName);
     let sub$ = observableFirebaseObject(ref);
     // firebase returns an object but we want an array of values.
     this.notes$ = sub$.map(_.toArray).map((arr)=>_.compact(arr));
     this.notes$.subscribe((x)=>console.log(x))
 }

 ngOnInit() {
   // This can't be called in the constructor because the properties
   // from the parent template are not yet populated.
   this.person$ = observableFirebaseObject(new Firebase(fbName)
     .child("stuff")
     .child("cat1")
     .child(this.id));
 }

  ngOnInit() {
    //  This can't be called in the constructor because the properties
    // from the parent template are not yet populated.

    const weatherURL = "https://publicdata-weather.firebaseio.com/";
    let city = new Firebase(weatherURL).child(this.city);

    this.currently = observableFirebaseObject(
      city.child("currently"));

    this.hourly = observableFirebaseArray(
      city.child("hourly/data").limitToLast(10));
  }

  ngOnInit() {
    //  This can't be called in the constructor because the properties
    // from the parent template are not yet populated.

    const weatherURL = "https://publicdata-weather.firebaseio.com/";
    let city = new Firebase(weatherURL).child(this.city);

    // More automatic way to move data to the template:
    this.hourly$ = observableFirebaseArray(
      city.child("hourly/data").limitToLast(10));

    // Less automatic way to move data to the templat:
    this.subscription = observableFirebaseObject(city.child("currently"))
      .subscribe(c => this.currently = c);
  }