Literate programming with continuous testing: http://t.co/jgVWLzj4e3 Feels rather reminiscent of Bret Victor's work.
miniblog.
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The Humane Representation of Thought, a talk by Brett Victor:
https://vimeo.com/115154289
I've not seen Brett talk before, and he raises interesting points about the influence of the medium on our analytical thoughts.