Post_28.1.rb

def gather_legs(first_leg, second_leg, third_leg)
  flights = []
  second_leg_number = -1 
  third_leg_number = -1

  first_leg.each {|leg| flights << [leg, second_leg[second_leg_number += 1], third_leg[third_leg_number += 1]].flatten}
  flights
end

def delete_nil(flights_array)
  flights_array.each do |array|
    if array.include? nil 
      array.delete(nil)
    else
      flights_array
    end
  end
end