Class variable

has three member variable types: class, class instance, and instance. */ class Dog # The class variable is defined within the class body with two at-signs

large-amplitude pulsators as a new class of variable stars. University of Warsaw. [2020-05-04]. （原始内容存档于2023-02-05）.  BLAPs – a new class of pulsating stars. University

variable），Smalltalk-80为每个类C介入了它们自己的元类C class。就像实例方法实际上属于类一样，类方法实际上属于元类。在类中定义实例变量（英语：Instance variable）和类变量（英语：Class variable），而在元类中定义类实例变量。

，另外恒星本身的搏动也可能可以解释这种变化。 K Giants in 47 Tucanae: Detection of a New Class of Variable Stars, Peter D. Edmonds and Roland L. Gilliland, Astrophysical Journal

later in the class end b = Blogger.new b.instance_variable_get(:@auth_token) # returns nil b.auth_token # returns token b.instance_variable_get(:@auth_token)