We all love Ruby, of course. One reason for that is the “Principle of Least Surprise”. But there are still many ways in which Ruby can surprise us! Some are good, but some… not so much.

This talk is about Ruby’s lurking “gotchas”, so that you can avoid being “gotten”. They range from basic differences from most other languages (or common sense, or common claims about Ruby), to ones that often catch even expert Rubyists. You will come away with an awareness of specific things to watch out for, and a "Spidey-Sense" of some general kinds of things also likely to be dangerous.