Top new questions this week:
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Inspired by this blog post.
Write a program that outputs 99 distinct programs (in the same language) that output the string I love you.
How the programs are separated from one another in the output ...
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Challenge
Write a program or function that takes a number \$n\$ and returns the smallest \$k\$ such that concatenation \$n'k\$ is a square. This sequence is described by A071176 on the OEIS.
I/O ...
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Background
The special linear group \$ SL_2(\mathbb{Z}) \$ is a multiplicative group of \$ 2 \times 2 \$ matrices whose elements are integers and determinant is 1.
It is known that every member of ...
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In musical notation, groups of notes shorter than one beat are joined together by a line at the bottom called a beam. Here are a few bars of music with the beams highlighted:
(Taken from Second ...
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In this fastest-code challenge, you are provided with a set of \$n\$ identical blocks and need to determine how many unique buildings can be constructed with them. Buildings must satisfy the following ...
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Background
Perfect shuffle algorithms like Fisher-Yates shuffle don't produce great results when it comes to music playlist shuffling, because it often produces clusters of songs from the same album. ...
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Special thanks to Bubbler and AdmBorkBork for supplying feedback about this challenge
Keta (Keyboard tacit — clever naming, I know!) is a golfing language I’ve been working on recently. One of it’s ...
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Greatest hits from previous weeks:
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What general tips do you have for golfing in JavaScript? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to JavaScript (e.g. "remove ...
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Credits to Calvin's Hobbies for nudging my challenge idea in the right direction.
Consider a set of points in the plane, which we will call sites, and associate a colour with each site. Now you can ...
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The sorting algorithm goes like this:
While the list is not sorted, snap half of all items (remove them from the list). Continue until the list is sorted or only one item remains (which is sorted by ...
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In this challenge, you should write a program or function which takes no input and prints or returns a string with the same number of bytes as the program itself. There are a few rules:
You may only ...
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Today is November 8th, 2016, Election Day in the United States of America.
If you are a U.S. citizen eligible to vote, then go out and vote if you haven't already before answering this challenge. Do ...
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I'm work on a problem which I set myself for fun, which is to create a python script which prints the even numbers from 0 to 100. The challenge is to make the script as small as possible. This is what ...
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Your job is to animate this circle illusion. It looks like the points rotating inside of the circle, but they are actually just moving in straight lines.
Criterias
The result has to be animated. ...
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Can you answer this question?
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Inputs:
The program or function should take 2 vector-like (e.g. a list of numbers) O and V of the same number of dimensions, and a number T (all floating-point numbers or similar)
Constraints:
T ...
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