Push-Pop Redundancy
This is a big one. It is also a little bit of a nuanced one.
The idea is that if you push something and then pop it without doing anything you should not have pushed it at all.
For example, if you want to move something to the offstack and then add one to it you might writ...
Background
Minifiers are used, commonly, when serving JavaScript to your Web Browser. It is commonly used to reduce the number of bytes that have to be sent. Saving bandwidth is useful for obvious reasons. Some people use obfuscaters (that intentionally make code harder to read), I am not tal...
Golf Mathematica for me!
code-challenge
Mathematica is known for having built-ins for nearly everything, but because of this, it can be tricky to chop bytes off.
Your task is to help me golf my code!
Input/Output
In: a verbose Mathematica code
Out: a golfed version of the code
Definitions
...
Von Neumann Ordinals
Tags: code-golf, printable-ascii, string
Challenge
Given a non-negative integer N do the following:
if N is 0, output []
else, output [output of 0,…,output of N-1]
Rules
there may be a consistent (for all N the same) amount of leading & trailing whitespaces/tabs/ne...
Do you remember my mat properly grouped by colors?
Yesterday I was looking at it and realized that some letters fit inside others. Example: a letter P fits in the place where the letter R goes. So here's a simple challenge: given two letters, return a truthy value if any one of the letters fit...
I had a problem with Javascript finding the longest word in an array. So I was curious about what is the best way to find the longest word in an array. I have here an array with a bunch of words.
var a= [edur, oot, taht, si, ,tahw, epip, rotaidar, a, htiw, uoy, kcuf, lliw, i, dna, hteet, ruoy, t...
I'm currently writing a challenge which forces people to work in pairs to participate in the challenge. However, this leads to the question, who wins in the pair?
I'm thinking about (ideally) having a popularity-contest (don't boo until after reading the challenge), where a pair's score is the s...
Is is acceptable to bunch together multiple answers in a CW post just because the challenge is trivial?
See e.g. https://codegolf.stackexchange.com/a/151280/43319.
Show me your core
On many 8-bit machines, it is relatively easy to output the entire core syntax of the built-in language, as everything required is in ROM and most 8-bit machines allow you to PEEK at each location therein, or otherwise easily access the ROM contents.
Here's the complete syntax...
On December 4, 2017, the Google Doodle was a graphical programming game featuring a bunny. The later levels were nicely non-trivial and they seemed like a great candidate for an atomic-golf challenge.
Details
Game
There are four available moves: hop forward, turn left, turn right, and loop. E...
What constitutes a trivial solution to a problem on this stack exchange?
Should there be a different rule for different languages (e.g. one token for very esoteric languages like Jelly, or just a built in property for C#)?
To check whether a list of non-negative integers is balanced, one can imagine putting respective weights on a board and then try to balance the board on a pivot such that the summarized relative weights left and right of the pivot are the same. The relative weight is given by multiplying the weig...
Mafia (also known as Werewolf) is a party game that plays roughly like this:
The game begins on day 0. After every day n comes a night n. After every night n comes a day n+1. i.e. D0, N0, D1, N1, D2, N2...
At the dawn of day 0, a host secretly chooses players to fill certain roles:
Some n...
Covalent bonding uses so-called "hybrid" orbitals to form tetrahedral, octahedral, etc. formations out of the s, p, and sometimes d orbitals. Their naming conventions are pretty much the concatenation of the component orbitals; for example, the hybridization of the s orbital and one p orbital wou...
I am too bored and want a challenge to solve. But I do not see any interesting challenges, and I am too lazy to search for one. Can you (Well, technically your code) suggest me one?
I/O
Input: None.
Output: A link to a random open(i.e. non-closed) challenge("Challenge" excludes tips!) on PPC...
The Drunken Typist
Background
A fypist comes home afte5 some rough drinking and realoxes that an um[ottant letter stilo needs to br written. ^o mje sure he gets the text correct ge writes 6he rext charactef by character ro be wurenof rhe reault. However, ne still mahages to misssome og thekeys...
Definition
An arrowhead matrix is a matrix that has all entries equal to 0, except the ones on the main diagonal, top row and leftmost column. In other words, the matrix should look like this:
* * * * * *
* * 0 0 0 0
* 0 * 0 0 0
* 0 0 * 0 0
* 0 0 0 * 0
* 0 0 0 0 *
Where each * is any non-zer...
