of(
  new Order('name', 'address 1', 1),
  new Order('name 1', 'address 2', 2),
  new Order('name 2', 'address 3', 3),
).pipe(
  filter(order => order.id > 1),
  tap(order => doSomethingWithOrder(order))
).subscribe(order => {
  // do something with each order
});