在Ruby中，如何从文件中维护一个很长的实例变量列表？

class MyClass
  def initialize
    @variable_list = []
  end

  def add_variable(variable)
    @variable_list.push(variable)
  end

  def remove_variable(variable)
    @variable_list.delete(variable)
  end
end

# 创建实例并添加/删除变量
my_object = MyClass.new
my_object.add_variable("variable1")
my_object.add_variable("variable2")
my_object.remove_variable("variable1")

class MyClass
  def initialize
    @variable_list = {}
  end

  def add_variable(name, variable)
    @variable_list[name] = variable
  end

  def remove_variable(name)
    @variable_list.delete(name)
  end
end

# 创建实例并添加/删除变量
my_object = MyClass.new
my_object.add_variable("variable1", "value1")
my_object.add_variable("variable2", "value2")
my_object.remove_variable("variable1")