摘要： cattr_accessor是 Ruby on Rails ActiveSupport一部分，不像attr_accessorn是Ruby的语言特色.cattr_accessor 是类级别上的attr_accessor，属于singleton方法。class Counter cattr_accessor :class_count attr_accessor :instance_countend counter1 = Counter.newcounter1.instance_count = 1counter1.class_count = 1 counter2 = Counter.newp co.. 阅读全文