Ruby方法()方法

你能详细说明它的工作原理或给我一个链接吗？

更新

我用methods()方法进行了实验并得到了这样的结果：

‘lab rat’代码

class First
  def first_instance_mymethod
  end
  def self.first_class_mymethod
  end
end
class Second < First
  def second_instance_mymethod
  end
  def self.second_class_mymethod
  end
end

使用类

#returns available methods list for class and ancestors
puts Second.methods.grep(/mymethod/)
  # => second_class_mymethod
  # => first_class_mymethod

#returns Class methods list for current class only 
puts Second.methods(false)
  # => second_class_mymethod

使用对象

obj = Second.new
def obj.obj_singleton_mymethod
end

#returns available methods list for object and ancestors
puts obj.methods.grep(/mymethod/)
  # => second_instance_mymethod
  # => first_instance_mymethod

#returns current object class methods
puts obj.methods(false)
  # => obj_singleton_mymethod