EdgeCase has published a great walkthrough of the various Ruby language features. They call it Ruby Koans. The Ruby Koans are a a collection of broken tests. Each broken test is designed to teach you something about the Ruby language. Many are fill-in-the-blank, eg:
def test_every_object_has_different_id obj = Object.new another_obj = Object.new assert_equal __, obj.object_id != another_obj.object_id end
To pass this koan/test, you’d replace the “__” with true, because new instances of objects have new object_ids.
I wouldn’t recommend this for people new to programming, but if you’re like me and used Ruby a few years ago but have fallen out of practice, it’s a perfect re-introduction. If you’re new to Ruby but have a solid background in other languages, this may be of use as well.