Linked Questions

2 votes
0 answers
1k 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 ...
anatolyg's user avatar
  • 13.7k
1 vote
0 answers
275 views

Proving the shortest quine in a particular language [duplicate]

Possible Duplicate: Golf you a quine for great good! People have proposed short quines in various languages. Puzzle: Find the shortest non-trivial quine in a language of your choice, and prove ...
Mechanical snail's user avatar
1 vote
0 answers
140 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 ...
WhatsUp's user avatar
  • 119
1 vote
0 answers
126 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 ...
Jared K's user avatar
  • 893
518 votes
982 answers
193k 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 ...
Martin Ender's user avatar
551 votes
241 answers
136k 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 not ...
235 votes
369 answers
65k 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 ...
Dennis's user avatar
  • 210k
145 votes
334 answers
31k views

Shortest code to produce infinite output

Write the shortest code you can that produces an infinite output. That's all. You code will only be disqualified if it stops producing output at some point. As always in code golf, the shortest code ...
tbodt's user avatar
  • 2,426
176 votes
101 answers
42k 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 ...
Calvin's Hobbies's user avatar
79 votes
261 answers
25k views

Is this even or odd?

Note: There is not been a vanilla parity test challenge yet (There is a C/C++ one but that disallows the ability to use languages other than C/C++, and other non-vanilla ones are mostly closed too), ...
Matthew Roh's user avatar
  • 5,347
125 votes
131 answers
17k views

Make an error quine!

Your challenge: write a "program", for a language of your choice, that causes the compiler/interpreter/runtime to produce error output when compiling/running your program which is identical to your ...
nneonneo's user avatar
  • 12.3k
76 votes
144 answers
14k 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 ...
bigyihsuan's user avatar
  • 9,508
73 votes
155 answers
14k views

Print X without X (cop's thread)

This is the cop's thread of a cops-and-robbers challenge. You can view the robber's thread here A pretty common beginner style question is to print some string, but there's a catch! You need to do it ...
Wheat Wizard's user avatar
  • 98.8k
130 votes
64 answers
40k views

Program that creates larger versions of itself (quine-variant)

You are to write a program that will output source code that is Larger than the original program (character wise) Will print another program larger than itself when run (i.e. the new program is also ...
Christopher King's user avatar
105 votes
92 answers
10k 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,...
Laikoni's user avatar
  • 26.2k

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