Hacker News on 20 December 2014

• Scans of North Korean IP Space
• Technical Papers Every Programmer Should Read at Least Twice (2011)
• An Offer to Sony from 2600
• Rails 4.2 released
• Bad code isn’t technical debt, it’s an unhedged call option
• The Tale of Studio Ghibli
• Facebook blocks Russian page supporting Navalny, Putin's biggest critic
• A Poor Imitation of Alan Turing
• Guido van Rossum: The Theory of Type Hinting for Python 3.5
• Your waitress, your professor