Hi, This month I'm trying to go through Advent Of Code one more year (previous years I didn't get too far) and I've been finding myself writing the same patterns multiple times that could be avoided by just having a helper function.
One of them is getting the last element of a vector. It is a quite common operation when solving these types of problems. For example Python as you might know uses negative indices. I have looked around and haven't seen it (unless I completely missed it which would be shameful) but wouldn't it be good to have this built-in by default? Instead of having to write: (vector-ref v (- (vector-length v) 1)) you would write: (vector-last v) or even better (vector-ref v -1). Interestingly Racket doesn't offer those functions either as far as I can tell. Basic use case? Get the maximum element of a sorted vector which would be done in constant time. I'm trying to solve the problems idiomatically, to the best of my limited knowledge, with Scheme. It is possible that the times I'm using vectors I should think about it differently and not use them, but I'm not 100% sure. What am I missing? Thank you in advance, Aleix
