Auto BrainFuck Golfer brainfuck metagolf test-battery Inspired by Auto BATCH golfer, thanks! You might have seen tons of question like this. These questions just want you to write a short program to output some quotes. One day, you think you're fed up with this and decided to write an automatic...

Rot1Rot3 code-golfstring Write a program or function such that given a string \$ S \$, encode it with Rot1Rot3. To encode it, do the following: Take \$ S\$ and partition it into blocks with \$ 3 \$ characters each. If it does not partition equally (i.e. \$ |S| \bmod 3 \neq 0 \$), take away som...

Background An Eisenstein integer is a complex number of the form \$ z = a + b\omega \$ where \$a, b\$ are integers and \$\omega\$ is the third root of unity \$\frac{1-\sqrt3i}{2}\$. The Eisenstein integers can be viewed as the triangular lattice points, as shown in the image below (from Wikipedi...

Surprised that we don't have a symmetrical difference challenge yet. Given two lists only containing positive integers, return all items among these two lists that aren't contained in both of the lists. Rules From the set definition: A set is a collection of definite distinct items. So ...

What is elementary cellular automata? Since I'm not sure I'll be able to explain this so that somebody who has never heard of this is able to understand, I'm giving an explanation from https://mathworld.wolfram.com/ElementaryCellularAutomaton Elementary cellular automata have two possible va...

Given a word, your task is to compact it by saving its first character and removing any other vowel (aeiou). Input Your input can be the word in STDIN, a function argument or any other input format that doesn't break the standard loopholes. You can assume the input only consists of lower chara...

Say, you have a sentence like this is a very long sentence with several words of no significance It contains the 26 lowercase letters of the alphabet and spaces And you have a dictionary, each words contains any number of the 26 lowercase letters and nothing else: henge renton then the out...

While I'm looking to implement this with python pandas ideally, this is more of an algorithm issue, and I wonder if some of you have some suggestions. The problem is as follows: A table contains purchases and sales of products by date, item, quantity (+ for purchases and - for sales) and price. ...