"The correct way to replace your nil checks with polymorphism is with the MissingObject pattern." I strongly agree. Adding stuff to nil can have unintended con

"The correct way to replace your nil checks with polymorphism is with the MissingObject pattern." I strongly agree. Adding stuff to nil can have unintended consequences: http://github.com/raganwald/homoiconic/blob/master/2009-02-02/hopeless_egocentricity.md#readme http://github.com/raganwald/homoiconic/blob/master/2009-02-0...