csail/6006psets_ng — comment on commit 25b6cb1c513906c0ba97768d5ad90d2152adfec4
File: 5/code/rsa/big_num.rb line 86
By pwnall:

You should implement the spaceship operator and include Comparable to get everything else. DRY FTW!

http://www.ruby-doc.org/core-1.9.3/Comparable.html