I read this story well over 30 years ago (probably over 40 years ago), and don't remember many specific details. However, I do recall the overall story, and would like to find it again. The main character answers a want ad, and takes a bus or train trip to the new job. On his way there, the lands...

Given a list of datetime ranges, write the shortest program/function/code snippet that returns a single datetime that is within all ranges, or some falsey value if no such datetime exists, i.e. a datetime that is in the intersection of the input datetime ranges. Input Input is a possibly empty li...

Mexican Hat Challenge, #メキシカンハットチャレンジ The hashtag #メキシカンハットチャレンジ* appeared on my X/twitter feed today. Japanese hackers have been drawing the "Mexican Hat Potential" 3D curve on all sorts of devices. My investigations also found this helpful picture of a guy wearing one of these "hats". The hat s...

7 Wonders is a board game where each player can score points by building stages of their Wonder, by war, and by building structures. This challenge focuses on the points scored by building a specific type of structures, the scientific ones. Each scientific structure, once built, provides the play...