Post_28.2.rb

class FlightBuilder
  attr_reader :origin, :destination
  attr_accessor :flight_duration

  def initialize(array)
    @origin = array[0].origin
    @destination = array[-1].destination
  end

  def calculate_total_duration(array)
    array.total_duration = 0
    array.each {|flight| array.total_duration += flight.duration}
  end

  def calculate_total_price(array)
    array.total_price = 0
    array.each {|flight| array.total_price += flight.price}
  end
end