Double an infinitely long number You are given a real number as an endless stream of digits. Output twice of it in an endless stream of digits. The exact format is flexible. You may separate digits and the two parts of the number by any reasonable separator, or without separators, as long as it...

This wasn't originally intended for code-golf, just as a little debugging routine to roughly visualize something "goofy" going on in a model of some (irrelevant here) physical process. But when I saw how surprisingly short it was, compared to my expectations, I just wondered if it can be further ...

Count the length of head movement code-golf parsing pathfinding Once upon a time I wanted to order custom tokens for a board game. They say they can do it, and then they present me their price list. I was confused because they charge per inch of head movement. INPUT: a 2d grid: |,-,\,/ are s...

This challenge was prety interesting for me. You can use any language. Shortest time on max conditions = win. Enjoy! Designer Arseny wants to draw a new brilliant logo. For a special conceptuality, Arseny decided that he would use a special stamp for his drawing. A stamp is a rectangle (h×w), ea...

Part 1 of the task is here Flags Mashup Bot is a small Twitter bot that generates a new country name based on two random country names and tweets the result every couple of minutes. Task Your task is to replicate what the bot does by writing a script or a function based on the following crite...