ng-2 angular lifecycle

 ngOnInit() {
    this.getFoods();
  }
 
  getFoods() {
    this.http.get('/app/food.json')
      .map((res:Response) => res.json())
      .subscribe(
        data => { this.foods = data},
        err => console.error(err),
        () => console.log('done')
      );
  }