Rails 5:添加循环来创建方法，每次递增1

class MyClass
  def create_methods(start_num, end_num)
    (start_num..end_num).each do |num|
      define_singleton_method("method_#{num}") do
        puts "This is method #{num}"
      end
    end
  end
end

obj = MyClass.new
obj.create_methods(1, 5)

obj.method_1 # 输出 "This is method 1"
obj.method_2 # 输出 "This is method 2"
obj.method_3 # 输出 "This is method 3"
obj.method_4 # 输出 "This is method 4"
obj.method_5 # 输出 "This is method 5"