Question

我的目标是能够为每个茶叶分配自己的ID，比较茶叶之间的价格和重量，并在命令行中完成所有操作。这是一个聪明的方法吗？到目前为止，这是我的代码：

class Tea

    def initialize(name, price, shipping, weight)
       @name = name
       @price = price
       @shipping = shipping
       @weight = weight
       get_tea_details
       @total_price = total_price
    end

   def get_tea_details
       puts "Enter name: "
       @name = gets.chomp
       puts "Enter price: "
       @price = gets.chomp.to_f
       puts "Enter shipping cost: "
       @shipping = gets.chomp.to_f
       puts "Enter weight: "
       @weight = gets.chomp.to_i
   end

   def total_price
       @total_price = @price + @shipping
   end

   def price_difference
      price_difference = t1.total_price - t2.total_price
      print "#{price_difference}"
   end

end

puts "Do you want to compare teas?: "
answer = gets.chomp
if answer == "yes"
t1 = Tea.new(@name, @price, @shipping, @weight)
t1 = Tea.new(@name, @price, @shipping, @weight)
end

price_difference

Answer 1

我不确定你在问什么，但我想你想知道如何编写一个函数来比较你的Tea对象。你可以这样做：

class Tea
    attr_accessor :name, :price

    def price_difference(other)
            print (@price - other.price).abs
    end

    def compare(other)
        same = true

        if(@name != other.name)
            puts "They have different names."
            same = false
        end

        if(@price != other.price)
            puts "They have different prices."
            same = false
        end

        if same
            puts "They are exactly the same!"
        end
    end
end

t1 = Tea.new
t2 = Tea.new

t1.compare t2 
"They are exactly the same!"

我还建议从变量中删除“tea_”前缀。这是不必要的，并增加了一点可读性。

在Ruby中创建多个对象然后比较它们

1 个答案: