Good list of other cool things. (Rack is sort of implicitly in my presentation due to the Rails Metal thing.) I had to really narrow it down to get 10 things.

Good list of other cool things. (Rack is sort of implicitly in my presentation due to the Rails Metal thing.) I had to really narrow it down to get 10 things. I wanted to put ActiveSupport::MessageEncryptor in there for sure but I couldn't figure out anything else to take out so I had to cut it.