1 Groups, semigroups, monoids, and computers - Joe Marshall (funcall.blogspot.com) 3 points by soegaard 936 days ago
2 Tail recursion and fold-left - Joe Marshall (funcall.blogspot.com) 3 points by soegaard 323 days ago
3 100% Coverage - Joe Marshall (funcall.blogspot.com) 2 points by soegaard 966 days ago
4 A polyglot program puzzle - Joe Marshall (funcall.blogspot.com) 2 points by soegaard 904 days ago