@bobthechemist I was home with the kids too. So don't worry. Honestly, I slept until 0:05 when all the noise started because I fell asleep while reading book with my daughter.
@OleksandrR. Since the photoresistor is already small (about 2 mm) and the resolution on my stepper motor is so poor, a slit wouldn't do much. The CD grating works better than I expected. In a dark room you can see that part of the blue region is missing, but otherwise it is a fairly continuous spectrum. The hard part is orienting it since the grooves are radial rather than linear.
@rm-rf haha I see. Well, maybe the question would not be useful if it were only representative of its title, but I think the topic of how useful is Mathematica for writing general applications is an important one. I guess 16 other people agreed
My brain is at a stand still for the moment. I'm working with what is supposed to be a tree data structure. I implement it as nested lists: {item, { {item, {...}}, {item, {...}} } } the problem is how do I apply a function to each node? I'm going to write the function such that the leaves have to evaluated first, so that the tree can only be evaluated from the bottom up. In the end each node will have been replaced with a new value.
