Fibers first example

fiber_one.rb

def find_in_batches
  index = 0
  chunk_size = 2
  while batch = query_batch(index, chunk_size)
    return if batch.length == 0
    yield batch
    index += 1
  end
end

def query_batch(index, chunk_size)
  range_beginning = index * chunk_size
  large_dataset[range_beginning...(range_beginning+2)]
end

def large_dataset
  [
    "Vhils",
    "AKACORLEONE",
    "Pixel Pancho",
    "+-",
    "Kruella D'Enfer",
    "Tamara Alves",
    "Add Fuel",
    "MAR",
    "Eime",
    "Bordalo II",
    "Felipe Pantone",
    "Ernest Zacharevic",
    "Wasted Rita",
    "Sainer"
  ]
end