Skip to content

Instantly share code, notes, and snippets.

@googya

googya/show_class_count.rb

Created April 11, 2014 01:52
Show Gist options
  • Save googya/10436811 to your computer and use it in GitHub Desktop.
Save googya/10436811 to your computer and use it in GitHub Desktop.
Download ZIP
show secret when creating a class in Ruby
Raw
show_class_count.rb
puts ObjectSpace.count_objects[:T_CLASS]; class Z; end; puts ObjectSpace.count_objects[:T_CLASS]
@googya
Copy link
Author

googya commented Apr 11, 2014 

a1 = [];

ObjectSpace.each_object{|e| a1 << e.object_id }; 

class AA; end;

 a2= []; 

ObjectSpace.each_object{|e| a2 << e.object_id }

可以找到新建的两个对象的地址， 然后根据其他属性判断， 哪个是 class， 哪个是 metaclass

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment