Decide if an integer is uniform I was recently implementing a Local Binary Patch (LBP) descriptor, and found the need to decide if a number is uniform, as described below. You can read about why this is needed in object detection here. Input/Rules: Take a (signed!) integer n in any way that s...

XKCD Comic: Goal: Given a date, the current Dow Opening, and your current coordinates as a rounded integer, produce a "geohash." Input: Input through any reasonable means (STDIN, function argument, flag, etc.) the following: The current date. This does necessarily have to be the date of t...

Normalize a Vector To normalize a vector is to scale it to a length of 1 (a unit vector), whilst keeping the direction consistent. For example, if we wanted to normalize a vector with 3 components, u, we would first find its length: |u| = sqrt(ux2 + uy2 + uz2) ...and then scale each compo...

Background Many esoteric programming languages don't have numbers built in at literals, so you have to calculate them at runtime; and in many of these cases, the number representation can be quite interesting. We've already had a challenge about representing numbers for Underload. This challenge...

Challenge: Take input of two black and white images and xor each pixel of the first, with each pixel of the second, add them to a new image and output the new image. Size of pictures does not matter. Extension doesn't matter. You can make it take input any extension and output any extension, as ...