spiral_code

Antirez describes a data storage technique for Redis which can demonstrate up to 5x memory savings.

Beautifully designed reference site for HTML & Unicode entities.

Interesting/magical techniques for adding to_proc functionality to a variety of Ruby objects, e.g.

[1,2,3,4,5].map &[:to_s, 2]  # => ["1", "10", "11", "100", "101"]

Phenomenal 4-part series on using monads in Clojure.