Questions tagged [popularity-contest]

A popularity-contest is a competition where the answer with the highest vote tally (upvotes minus downvotes) wins. As these are frequently closed, read the tag info and post your challenge to the sandbox first.

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2 answers
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The many ways to skin a `cat` [duplicate]

The well known cat command simply copies its stdin directly to stdout unchanged. But there are plenty of other commandline tools that exist... What other commands ...
CarmenCarmen's user avatar
-1 votes
1 answer
136 views

Write a typeracer [duplicate]

Description a typeracer is an apps where user could type and evaluate their typing speed and accuracy. Criteria User could type "A quick brown fox jumps over the lazy dog." A visual ...
Candra R's user avatar
18 votes
3 answers
827 views

Universal Unicode Clock

Plot contrivance You wake up to find that something has gone horribly wrong! Your time machine has malfunctioned and you are lost sometime between June 2022 and October 1991. You check the computer ...
Wheat Wizard's user avatar
  • 97.7k
18 votes
52 answers
3k views

Can you give me half? (No digits) [closed]

The task is to provide code that evaluates to 0.5 numerically, i.e. the output must be recognized by your chosen language as a numeric value (Number, float, double, etc), not as a string. The catch, ...
Eliseo D'Annunzio's user avatar
10 votes
5 answers
545 views

(Σ*)² ⟲ Σ* (aka Round-Trip a String Pair) [closed]

This is a challenge I thought of recently which I think is not hard but allows for a wide range of possible solutions. Seems like a perfect fit for the creativity of PPCG users :) Your Task Define two ...
Quelklef's user avatar
  • 709
-10 votes
5 answers
589 views

Print your username by ONLY using the characters in your username [closed]

You have to print out your username, by only using the characters in your username. Standard loopholes are forbidden This is not code-golf, so shortest does not win Don't modify your username please ...
Wasif's user avatar
  • 12.3k
18 votes
28 answers
2k views

Output a unique sign sequence

A sign sequence is an infinite sequence consisting entirely of \$1\$ and \$-1\$. These can be constructed a number of ways, for example: Alternating signs: \$1, -1, 1, -1, ...\$ \$-1\$ for primes, \$...
caird coinheringaahin g's user avatar
0 votes
1 answer
158 views

Look for n-plicates [closed]

If you are given an array of numbers between 1 and 100 and an integer n, you must remove any instances of an item that appear greater than ...
applemonkey496's user avatar
34 votes
4 answers
3k views

Make The Finest Magic Code Square

In math a magic square is an N×N grid of numbers from 1 to N2 such that every row, column, and diagonal sums to the same total. For example here's a 3×3 magic square: In this challenge we'...
Calvin's Hobbies's user avatar
2 votes
0 answers
284 views

Heart-shaped quine [closed]

As you may or may not know, Valentine's day is getting close. So today, my task for you is: Write a heart-shaped quine Rules: Code should look like an identifyable heart shape, i.e. Has two round ...
Martmists's user avatar
  • 439
3 votes
6 answers
387 views

Nested lists as printable 2D objects [closed]

I don't know if something like this exists already (and I'm not finding the right key words) but if not, it felt like it could be an interesting coding puzzle. The challenge is, to take an ...
Joe Healey's user avatar
4 votes
3 answers
527 views

Polycops and Robbers (Robbers' Thread)

This is the robbers' thread, the cops' thread is here A polyglot is a program, that without modification, can run in multiple languages. Robbers' Challenge First, find a vulnerable cop's answer, ...
kepe's user avatar
  • 923
5 votes
9 answers
1k views

Polycops and Robbers (Cops' Thread)

This is the cops' thread, the robbers' thread is here A polyglot is a program, that without modification, can run in multiple languages. Allowed languages Any language that was made before the ...
kepe's user avatar
  • 923
8 votes
1 answer
494 views

Escape from the tarpit (Robbers)

This is a cops-and-robbers challenge based around defining languages and proving they are Turing complete. This is the robbers' thread. The cops' thread is here. Robbers The cops will post definitions ...
N. Virgo's user avatar
  • 7,252
12 votes
1 answer
876 views

Escape from the tarpit (Cops)

This is a cops-and-robbers challenge based around defining languages and proving they are Turing complete. This is the cops' thread. The robbers' thread is here. Cops As a cop, you will prepare two ...
N. Virgo's user avatar
  • 7,252
34 votes
3 answers
2k views

Design a One Instruction Set Computer! [closed]

Notice: I'm willing to give a bounty to any answer that I find interesting. Your challenge is to design a Turing-complete one instruction set computer (OISC): An OISC is an abstract machine that ...
MD XF's user avatar
  • 13.8k
16 votes
4 answers
1k views

Lorem Ipsum Generator [closed]

Lorem Ipsum is placeholder text used when preparing layout without wanted to have content already filled. One of its key features over using some arbitrary text is that it is nonsense. It isn't even ...
Frames Catherine White's user avatar
21 votes
19 answers
7k views

Print a Variable's Name [closed]

Write a function (not a full program), so that if the function is called with a single global variable (or your language's closest equivalent) as its argument, it outputs (i.e. prints or returns) the ...
Caleb Kleveter's user avatar
12 votes
13 answers
5k views

Reversed language name [closed]

You should code a piece of code that looks like it outputs the language name but actually outputs the name reversed. E.g. a Python program should look like it outputs ...
user avatar
4 votes
4 answers
3k views

April Fools Day! [closed]

Your challenge is simple: write a program or function which appears to print the first ten numbers of any integer sequence (on OEIS, the answerer may choose which sequence), but instead prints the ...
vikarjramun's user avatar
100 votes
10 answers
5k views

Write a Programming language of Unknown Completeness

Determining whether a Language is Turing Complete is very important when designing a language. It is a also a pretty difficult task for a lot of esoteric programming languages to begin with, but lets ...
Wheat Wizard's user avatar
  • 97.7k
7 votes
3 answers
654 views

HRNG - Human Random Number Generator [closed]

You know it: keyboard or mouse input is just too mainstream to create Random Numbers through human behavior. Create the most unique (Pseudo)Random Number Generator that create its numbers through ...
Serverfrog's user avatar
0 votes
4 answers
367 views

A boring version of yourself [duplicate]

A boring version of yourself Have you ever dreamed of a boring version of you which types the text you just typed ? No ? Because that's exactly what I'm challenging you to do ! The program needs to ...
Sygmei's user avatar
  • 1,157
4 votes
0 answers
406 views

Unpixellate an image [closed]

When you resize an image down to a very small size, it looks very blocky when you scale the pixels back up individually. In extreme cases, as above, you can no longer reconstruct the original image, ...
Photographer's user avatar
-5 votes
4 answers
475 views

Help Me Count to Ten! [closed]

You will write a simple program that prints exactly 1 2 3 4 5 6 7 8 9 10 to STDOUT, Console, or your language's closest output method. No other visible output ...
yummypasta's user avatar
20 votes
27 answers
2k views

8 ought to become Infinity [closed]

Let's take a look on a typical loop, which usually performs 8 iterations: for (int x=0; x<8; ++x); You have to make it infinite! It's a popularity-contest ...
Qwertiy's user avatar
  • 2,999
3 votes
3 answers
204 views

Correlation Coefficient of Words [closed]

This is going to be relatively quick... Challenge Given a lower-case word as input, calculate the Pearson's Correlation Coefficient between the letter position of the word (nth letter within the ...
Eliseo D'Annunzio's user avatar
2 votes
0 answers
229 views

Generate groups for in-class work [closed]

In a smallish class, some lectures are set aside for working in groups. The instructors don't want people to group themselves together with the same people every time; instead, they create the groups ...
Greg Martin's user avatar
  • 15.4k
32 votes
5 answers
2k views

Patch the Paragraph

In the spirit of Patch the Image, here's a similar challenge but with text. Challenge Bit rot has afflicted your precious text! Given a paragraph composed of ASCII characters, with a rectangular ...
AdmBorkBork's user avatar
  • 43.3k
1 vote
1 answer
371 views

Meta Obfuscate a String [closed]

There are numerous reasons for trying to obfuscate input. These include preventing decompiling, and being a nuiscance. With this in mind your challenge should your choose to accept it is to write a ...
Rohan Jhunjhunwala's user avatar
45 votes
4 answers
2k views

Computer Generated Cracked Soil

Write a program that takes in an integer from 0 to 65535 (216-1) and generates a unique 500×500 pixel image that looks as similar as possible to these 6 real life images of cracked soil: These ...
Calvin's Hobbies's user avatar
37 votes
0 answers
5k views

Deep learning Fizzbuzz [closed]

Inspired by the job-interview with Joel Grus, the goal of this challenge is to write a tensorflow (or other deep/machine learning) program that learns Fizzbuzz and correctly prints out the answers to ...
Hooked's user avatar
  • 431
-2 votes
1 answer
251 views

Ponderous primality testing [closed]

One of my favorite algorithms was posted on Stack Overflow as an answer to What is the fastest way to generate prime number recursively?. In pseudocode: Nathan's algorithm ...
Charles's user avatar
  • 2,751
3 votes
1 answer
330 views

What time is it again? [closed]

The Inspiration The Challenge I'm tired of seeing the same old-same old clock in my top-right-hand corner of my screen. It's time for a new clock. While the clock clock sated my lack of interesting ...
Addison Crump's user avatar
119 votes
10 answers
8k views

Patch the Image

In a popular image editing software there is a feature, that patches (The term used in image processing is inpainting as @mınxomaτ pointed out.) a selected area of an image, based on the information ...
flawr's user avatar
  • 43.8k
2 votes
2 answers
298 views

Find the line guaranteed by Sylvester-Gallai

The Sylvester-Gallai theorem says: Suppose you have a finite list of points in the plane. Suppose further that not all of those points are collinear (lie in a single line). Then there is some line ...
msh210's user avatar
  • 3,433
-7 votes
2 answers
267 views

Unique multiplication by ten [closed]

People, it's a popularity contest, you have to do somthing cool here. Think about cool ways of breaking the code in most languages, not about validating for everyting! Initially this challenge ...
Qwertiy's user avatar
  • 2,999
55 votes
6 answers
3k views

Paint by Numbers (using programming, not numbers)

Your task is to create a program which takes a black-and-white outlined image (example images are below) and fills it in with colour. It is up to you how you section off each region and which colour ...
OliverGriffin's user avatar
8 votes
1 answer
6k views

Make the pattern from composition notebooks [closed]

This challenge was xnor's idea, taken from Digital Trauma's challenge donation thread. Your challenge is to write a program that, as xnor put it, "procedurally generate[s] the splotchy black-and-...
KSFT's user avatar
  • 1,557
4 votes
0 answers
331 views

Build an image-glitching algorithm [closed]

It's well known that corrupted JPEG files or NTSC/PAL streams will appear as distorted versions of the true images, or versions covered in random-looking blocks of pixels. Consider the below image (...
Joe Z.'s user avatar
  • 34.8k
3 votes
0 answers
350 views

Most creative/diabolical/entertaining way to find Python version? [closed]

There are important differences between Python 2 and 3, so it's often useful to know which version of the interpreter is running your code. The straightforward method is something like this: ...
jakevdp's user avatar
  • 747
-9 votes
1 answer
486 views

Self-debugging code [closed]

Your Task Write a program using ASCII characters. Five alphanumeric (0-9, A-Z, a-z) characters will be inserted at random into your program's source code. Your task is to detect and output these ...
ghosts_in_the_code's user avatar
-6 votes
24 answers
513 views

Generate 0 or 1 [closed]

Is this Q too easy to ask, or has it just never been thought of? Generate a random number, either 0 or 1 using a program You may use a pre-defined function. The code must be executable. (It can't ...
ghosts_in_the_code's user avatar
26 votes
8 answers
3k views

Create a programming language that only appears to be unusable (Robbers' thread)

See the cop thread for more information. Each answer to this question should crack an answer there. That is to say, it should be code to find the third-largest integer in the input when run in the ...
feersum's user avatar
  • 31.3k
96 votes
15 answers
11k views

Create a programming language that only appears to be unusable

Robbers' challenge thread is here. Cops' challenge: Design a programming language that appears to be unusable for programming, but admits computation (or at least completion of the task) through some ...
feersum's user avatar
  • 31.3k
0 votes
15 answers
616 views

Programming? No, it's Projamming [closed]

Hopefully not duplicate, but I did not find one. Challenge The challenge is to write full program, which compiles (without errors), but, when executed, will not finish the execution till the end, ...
Zereges's user avatar
  • 1,183
219 votes
89 answers
39k views

Make your language unusable

Try to write some code in your language and make it not satisfying our criteria of being a programming language any more. A language satisfies our criteria (simplified version for this challenge) of ...
jimmy23013's user avatar
  • 36.9k
0 votes
1 answer
278 views

Help me get a date for Homecoming [duplicate]

My school has its Homecoming dance next week, and there's someone in mind I want to ask. But I don't want to ask her the normal way. I want to send her a program that prints "Rachel, will you go to ...
Arcturus's user avatar
  • 7,347
14 votes
5 answers
2k views

RTTTL Obfuscation

RTTTL, or Ring Tone Text Transfer Language is a music format that was invented by Nokia in the dawn of time when dinosaurs roamed the land. It allows for fairly crude pieces of music (no chords or ...
a spaghetto's user avatar
  • 11.2k
7 votes
2 answers
922 views

How many languages can you use simultaneously in ONE functioning program in under 500 bytes [closed]

Intro In Objective-C (a superset of C and an object-oriented language), I can create an object called a ...
Albert Renshaw's user avatar

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