ancestry in ruby

module ancestry.txt

$ irb
>> module A; end
=> nil
>> module B; end
=> nil
>> module C; end
=> nil
>> module B; include A; end
=> B
>> class X; include B; end
=> X
>> module A
>>   include C
>>   end
=> A
>> X.ancestors
=> [X, B, A, Object, Wirble::Shortcuts, PP::ObjectMixin, Kernel]
>> B.ancestors
=> [B, A]
>> A.ancestors
=> [A, C]
>> # note that B does not know about C, even though A does!

See also: http://gist.github.com/237387