def get_receipts
      receipts = []
      i = 0
      loop do
        begin
          receipts.push get_receipt(i)
          i += 1
        rescue IndexError
          return receipts
        end
      end
    end
def get_receipts
      receipts = []
      i = 0
      loop do
        begin
          receipts.push get_receipt(i)
          i += 1
        rescue IndexError
          return receipts
        end
      end
    end
Build a list of all receipts in this block.