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Wow Justin, I really loved this! My only criticism is that it’s too bad you
used CoffeeScript instead of Ruby :)

I especially loved the top-down approach you used in your example. I’ve started
to use this all the time myself. I actually wrote about this recently:
http://patshaughnessy.net/2014/2/10/use-an-ask-dont-tell-policy-with-ruby

For me, the biggest benefit of the top-down (“Ask, Don’t Tell” - apologies to
Dave Thomas) style is how it encourages a functional coding style. There are
just so many benefits of doing this. Since I’ve been doing this at a micro
level (methods and single classes) and not with entire applications, I hadn't
thought too much about how this relates to mocking. So I loved your mocking
style and will definitely try it next time I break down a new app into pieces.

I also LOVED your line “Develop a workflow that disposes, rather than changes,
existing code.” Very insightful.

And btw fantastic screencast production work. I felt like I was watching a
conference presentation inside your office. Great job.

Anyway, thanks for the screen cast. Great work.