If one is having to implement an each or map or select method in ruby, then I can definitely appreciate the differences you point out. Even though I've been usi

If one is having to implement an each or map or select method in ruby, then I can definitely appreciate the differences you point out. Even though I've been using ruby a long time, it would frankly still be a bit of a pain to have to remember the details of how yield works. Because Enumerable provides so much functionality, I almost never need to implement methods like those. So what I really care about a lot more are the ergonomics of using each, map, select, reject, all?, any?, etc, which I use very frequently.