First day of really serious coding. At the end of this, a working version of a class that I expect to be central to my final implementation (and hence, likely to be rewritten many times from here on).
In the past, I attempted to persuade architecture students that they should think about code as a building material. It will be interesting to see whether I continue to think this myself after being immersed in it some more. The romantic view of design is certainly that engagement with one's materials is of the essence.
(A recent article on the work of a designer who is letting the material take the lead).