Duncan's UnitKit

James Duncan Davidson has just released UnitKit version 0.6. A nice and simple unit testing framework with great Xcode integration!

The size of A

Just found out the width-height ratio of any A0, A1, ..., An paper is 1:sqrt(2). Thus (if I'm not completely wrong) one should be able to use the function h(x) = sqrt(sqrt(2)) * (1 / sqrt(2))^x to get the height (in meters) of any paper of size Ax, and the function b(x) = h(x) / sqrt(2) (or b(x) = h(x + 1)) to get the width of any paper of size Ax. You never know when this might come in handy.