如何使用puts显示多项目？旅行应用订单输出格式优化求助

Hey there! I get exactly what you're aiming for—you want your order summary to show up in a clean, user-friendly way like 2 SevendaySurfSportTour instead of the raw hash output. Let's tweak your display method to make that happen.

The Issue #

Right now, your display method uses puts @order_items, which outputs Ruby's default string representation of a hash (like {"SevendaySurfSportTour"=>2}). To get the format you want, we need to iterate over each item in the hash and format the output manually.

The Solution #

Update your TourOrder class's display method to loop through each key-value pair in @order_items and print them in your desired format:

class TourOrder
  def initialize
    @order_items = Hash.new(0)
  end
  def add_item(name, quantity)
    @order_items[name] += quantity
  end
  def get_items
    return @order_items
  end
  def display
    puts "Thank you for coming!"
    # Iterate over each tour and its quantity
    @order_items.each do |tour_name, quantity|
      puts "#{quantity} #{tour_name}"
    end
  end
end

How It Works #

• @order_items.each do |tour_name, quantity| loops through every entry in your hash. For each entry, tour_name is the key (the tour's name) and quantity is the value (how many of that tour were ordered).
• puts "#{quantity} #{tour_name}" uses string interpolation to combine the quantity and tour name in the exact format you want.

Example Output #

If you run this code:

order = TourOrder.new
order.add_item("SevendaySurfSportTour", 2)
order.display

You'll get this clean output:

Thank you for coming!
2 SevendaySurfSportTour

This also works if you have multiple tour types in the order—each one will get its own properly formatted line.

内容的提问来源于stack exchange，提问作者Devbreaker29