Ruby Koans

If anyone is learning Ruby, and wants to become more familiar with various nuances, go download the Ruby Koans.

There are about two dozen files, each discussing a specific topic. You go through each file, looking for __ segments and replace them with statements which would result in true assertions.

After completing a few, you can run ruby path_to_enlightenment.rb and you get the following prompt:

user:~/koans$ ruby path_to_enlightenment.rb 
AboutNil#test_nil_is_an_object has expanded your awareness.
AboutNil#test_you_dont_get_null_pointer_errors_when_calling_methods_on_nil has 
expanded your awareness.
AboutNil#test_nil_has_a_few_methods_defined_on_it has expanded your awareness.
AboutObjects#test_everything_is_an_object has damaged your karma.

The Master says:
  You have not yet reached enlightenment.
  You are progressing. Excellent. 8 completed.

The answers you seek...
  <"FILL ME IN"> expected but was  <true>.

Please meditate on the following code:
  /home/alex/local/ruby/koans/about_objects.rb:5:in `test_everything_is_an_object'

when you lose, don't lose the lesson
your path thus far [.X________________________________________________] 8/280
user:~/koans$

This really helps understand some of the nuances underpinning Ruby.