Course: Berkeley’s CS 61B: Data Structures.
One problem about Date manipulations.
[…] Your task is to fill in the implementation of a class that manipulates dates. Do not use any of the built-in operations on dates provided in the Java library in your solution. […]
The interesting part was making difference() — a
function method that calculates the difference of two Date objects — work correctly. That took me some trial and error (and a re-imagining/re-write) to get right.
Interesting how a simple thing like that made me pause, I’ve used ready-made libraries in the past (perl’s and PHP’s DateTime) and didn’t have to deal with these issues directly.