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The Axis of Eval: Why Lisp is a Big Hack (And Haskell is Doomed to Succeed)
(axisofeval.blogspot.ca)
99 problems to help you learn Haskell
Good discussion of objects with value-semantics versus objects with entity-semantics
Originally: http://grasswire-engineering.tumblr.com/post/94043813041/a-url-shortener-service-in-45-lines-of-scala
*Very* compact.