anchor.diff:              .get('http://localhost:3000/user')
               .map((res) => { return <User[]>res.json(); });
       }
  -
   }
   ----
   
  
positive.code: [source,javascript]
  ----
  getUsers(){
      this.users = this._userService.getUsers().subscribe((users) => {
          this.users = users;
      });
  }
  
negative.code: 
  [source,javascript]
  ----
  constructor(userService: UserService){
  	this._userService = userService;
  	this.users = this.getUsers();
  }
  