小试验，关于Ruby类的祖先链

对于理解Ruby的方法查找过程，祖先链概念非常重要，相同模块在原祖先链的类中多次混入时，新祖先链如何呢，做了一个小试验：

 

module M; end
module M1; end
module M2; end

class MyClass
  include M
  include M1
end

class MySubClass < MyClass
  include M
  include M2
end

obj = MySubClass.new
puts obj.class.ancestors()
puts "\n\n\n"

puts BasicObject.superclass==nil

def my_ancestors(current_class)
  a = []
  a.push current_class
  sc = current_class.superclass
  until sc==nil
    a.push sc
    sc = sc.superclass
  end
  a
end

puts my_ancestors(obj.class)