It is Ruby in that it requires a Ruby interpreter to execute that line of code. It certainly isn't Javascript or Python. Is the article missing the context that these lines of code are being executed along side the Rails framework? Sure. Is it distracting from the main meaning of the article? I would say not.
That's fair, and definitely warrants skepticism, but was there anything in the article that you found counterfactual? I'm no RoR expert, but I do enjoy looking at how other people solved problems. Is there anything in the article that's counterfactual or that you've experienced causes headaches down the road?
