Linked Questions

10
votes
6answers
355 views

Transpose quine

In this quine variant, your program must output its source code transposed across the diagonal from the top left to the bottom right. For example: your program on four lines outputs ...
34
votes
13answers
3k views

1-up your average quine

A 1-up quine is a program which is very similar to a quine. The one major difference is that instead of printing itself once, when n copies of the program are concatenated, the result prints the ...
19
votes
20answers
2k views

Write a Metaquine

A metaquine is a program which is not a quine, but whose output, when run as a program in the same language, is a quine. The goal of this challenge is to write a metaquine. This is code-golf, so ...
10
votes
4answers
464 views

Write a Semiquine

Suppose you have 2 languages, A and B. A string s is a semiquine in ...
32
votes
12answers
2k views

Tips for golfing in vim

I've recently realized how vim works great for golfing, especially for kolmogorov-complexity. Also, according to meta vim is a perfectly acceptable 'programming language' at least, for the scope of ...
2
votes
0answers
596 views

Make a program that outputs its own MD5 hash [duplicate]

Challenge: make a program that outputs a MD5 hash of its source code. You should not use tricks that would be considered cheating in a quine sense (discussed here). Using built-in functions and ...
22
votes
4answers
514 views

Multiple program Quinecatenate!

Your task is to give three different languages A, B, C, and write two different programs P and Q such that: P is a quine in language A, but not a quine in B nor C; Q is a quine in language B, but ...
26
votes
12answers
1k views

Quine / Reverse Quine

Write a complete program that takes a boolean or non-negative integer input. It must: Output its own source code if the input value is falsy Output its own source code in reverse if the input value ...
30
votes
30answers
2k views

A Quine on Every Line

Your goal is to create a program that prints itself indefinitely, with a new line after each one. Thus, if your program is a one-liner, it would be repeated on every line of the output. Example ...
198
votes
295answers
46k views

Is this number a prime?

Believe it or not, we do not yet have a code golf challenge for a simple primality test. While it may not be the most interesting challenge, particularly for "usual" languages, it can be nontrivial in ...
428
votes
771answers
131k views

“Hello, World!”

So... uh... this is a bit embarrassing. But we don't have a plain "Hello, World!" challenge yet (despite having 35 variants tagged with hello-world, and counting). While this is not the most ...
169
votes
97answers
38k views

Programming Languages Through The Years

In this challenge, users will take turns completeing three fairly simple coding tasks in programming languages that are allowed to be progressively older. The first answer must use a programming ...
41
votes
9answers
5k views

Write a Quine in Plain English

Write a quine that consists of real English words separated by single spaces. A "word" is defined as a string containing only lowercase and uppercase letters (...
510
votes
230answers
114k views

Showcase of Languages

Notes This thread is open and unlocked only because the community decided to make an exception. Please do not use this question as evidence that you can ask similar questions here. Please do ...
135
votes
28answers
11k views

Making Future Posts Runnable Online with Stack Snippets

Stack Snippets were recently added to PPCG! Reminiscent of JSFiddle, Stack Snippets allow HTML, CSS, and JavaScript to be run directly in posts! Here is a very simple Stack Snippet: ...

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