Linked Questions

19
votes
5answers
1k views

Tips for Creating/Maintaining a Golfing Language

Creating a golfing language can be hard. Let's help budding golfing language creators out and provide some helpful tips on how to create one. I'm looking for tips on: The design process ...
0
votes
0answers
61 views

What is the shortest brainfuck quine? [duplicate]

(Apart from the empty program of course) The shortest I could find was this 410 byte beauty: ...
8
votes
4answers
339 views

Rock Paper Scissors (Sorta) Quine

Create three programs, which we'll call Rock, Paper, and Scissors. Each program must be unique, and accept input. If a program gets any input which is not one of the programs Rock, Paper or ...
0
votes
0answers
99 views

Write a piece of code that prints out itself [duplicate]

I'm new to this site, so I don't know whether this challenge already appeared: Write a piece of source code, so that after running the code, it prints out exactly (i.e. not longer, not shorter) the ...
18
votes
7answers
3k views

Y2K… in 2019?

It's August 10th, 2019, but your task still involves Y2K. Weird, right? Create a program that prints itself, with a two digit number appended to it. The first time you run it, it should append 00 to ...
60
votes
97answers
10k views

Print the last, middle and first character of your code

The challenge is simple: Print the last, middle, and first character of your program's source code, in that order. The middle character is defined as follows, assuming a source length of ...
3
votes
15answers
599 views

The anti-narcissist

The narcissist is a program which, given its own source as input, prints a truthy value and, given anything other than that, prints a falsey value. Today, we're reversing this. Create a program that, ...
-2
votes
5answers
299 views

45 degree quine [closed]

A very simple golf this time, but should be fun to do. Challenge Output your code, but rotated 45 (or -45) degrees. E.g: lorem ipsum dolor sit amet becomes <...
-3
votes
2answers
247 views

Invert your code [closed]

Challenge Return the full contents of your program, but inverted. How do your invert something? Well, Letters: Take the position of the letter in the alphabet, subtract from 26, and use the letter ...
22
votes
3answers
1k views

Meta-bowling Golf

Your task is to create the shortest program (A) that outputs another program (B) with the most unique bytes, which in turn outputs the original program (A). Essentially, you are golfing one half of a ...
10
votes
12answers
2k views

Quine outputs itself in binary

Your task, if you wish to accept it, is to write a program that outputs its own source code in the binary UTF-8 representation. Rules The source must be at least 1 byte long. Your program must not ...
3
votes
13answers
420 views

Create a kind of quine, such that the program prints one character of itself, then two, then three and so on

Create quine variant such that the program prints its first character, then the first two, then three and so on until the whole program is printed. Example Suppose your code is ...
16
votes
10answers
927 views

Q​u​i​n​e R​e​l​a​y​!

Quine Relay! A quine relay of order \$n\$ is a series of programs \$P_1\dots P_n\$ in distinct languages such that each program \$P_i\$ outputs \$P_{i+1}\$ and \$P_n\$ outputs \$P_1\$. For example, ...
1
vote
0answers
101 views

Help us escape the quine factory! Put messages into quines [duplicate]

I've been enslaved in a quine factory. The other workers and I can't communicate with the outside world, we can only slave away making quines all day. The masters will reject any work that isn't a ...
30
votes
14answers
4k views

2 Cats in a Quine

Challenge Make two programs, A and B, which are both cat programs in the same language. When concatenated, AB (also in the same language) should be a quine. For example, suppose ...
19
votes
7answers
1k views

Rolling Quine Dice

Create a program that outputs itself. However, if the source code is repeated n times (meaning to concatenate a copy of the source code to the end n-1 times), then there should be 1/n probability ...
30
votes
12answers
2k views

Write a Quine Suite

We've had a lot of quine challenges, but a lot of the quine formats are similar, lets create some variance in our quines. Your task is to create a selection of programs in the same language (at least ...
11
votes
1answer
627 views

Auto cycler quine

Make a quine but with a twist. Statement The quine prints its code but puts its first character at the end. (You can do it in reverse but include that note in your answer) The output must then be a ...
31
votes
3answers
718 views

Build a golfing language with me

A lot of PPCG users helped with the creation of this challenge, both in chat and the Sandbox, specifically Martin Ender, AdmBorkBork, Emigna and user202729 Our community has found it necessary to ...
5
votes
3answers
238 views

Intron Adder Quine

In the context of quines, an intron (or payload) is a part of a quine that serves no purpose in producing output, but is still included in the data section. For example: ...
42
votes
27answers
5k views

Self-growing code codee codeee codeeee

Write a program (or function) (let's call it P1), that when run, outputs another program P2 of the same language and exactly 1 byte longer than P1. Program P2 when run, should output a 3rd program P3 ...
28
votes
18answers
5k views

Take a stand against long quine lines

or: Build a vertical quine Inspired by Take a stand against long lines. Your task is to build a vertical quine with as short a line length as possible. Scoring Shortest line length (excluding ...
21
votes
11answers
3k views

Is it a substring of itself?

Given a string, return whether the string is a substring of the program's source code. Standard quine rules apply, meaning you cannot read your own source code. The length of the input is guaranteed ...
13
votes
13answers
740 views

Tips for golfing in QBasic

What general tips do you have for golfing in QBasic? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to QBasic (e.g. "remove comments" is ...
7
votes
4answers
669 views

Unfurling-Safe Quine

Write a proper quine containing at least one newline/linefeed whose every unfurling is either itself a proper quine or outputs the original quine. Your answer can mix and match outputting itself and ...
12
votes
12answers
730 views

Travel Back in Quine

The challenge here is simple, and not at all about byte-count. Your job is to output the first 50 characters of the previous quine's source code, concatenated with the first 50 characters of yours ...
4
votes
7answers
837 views

Make a base64 Quine! [duplicate]

Your challenge is to output a Base64-encoded version of your source code, and optionally a line break. You must output the correct padding, if any. Standard quine rules apply, shortest answer wins. ...
29
votes
20answers
4k views

Interquine - Two programs that output each other in a loop

Program A outputs program B's code when run, and B outputs A's source. Requirements: Only one language across both programs Programs are different. One program that outputs itself does not qualify. ...
75
votes
16answers
15k views

Build a Faulty XKCD Browser

Challenge Given the number of an XKCD comic, output the title text of that comic (the mouseover text). However, the program must throw an error when given the numbers ...
93
votes
83answers
9k views

Unique is Cheap

Write a function or program that determines the cost of a given string, where the cost of each character equals the number of how many times the character has occurred up to this point in the string,...

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