Which underlying principles do you have in mind? I might use any suggestions you have to augment the next edition. By the way, though the feedback on the inclu

Which underlying principles do you have in mind? I might use any suggestions you have to augment the next edition. By the way, though the feedback on the inclusion of TDD has generally been positive, it can get tedious, even for me. I do hope to produce a simpler, test-free Rails intro at some point as a complement to the present tutorial.