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Search options questions only not deleted user 78410

For challenges that involve the physical layout or physical manipulation of source-code.

39 votes
31 answers
4k views

Concatenated halting problem: no + no + ... = yes

Challenge Write \$2 \le n \le 10\$ distinct, valid non-halting full programs in your language of choice. If all of them are concatenated in order, the resulting full program should be a valid halting …
Bubbler's user avatar
  • 78.4k
23 votes
10 answers
2k views

I (rev)?(pal)? the source code, you (rev)?(pal)? the input!

Just because the reverse and palindrome were not too challenging individually :) Write a program (full program or function) that satisfies the following: given a string input, the program as-is outpu …
Bubbler's user avatar
  • 78.4k
19 votes
3 answers
963 views

Magical BF: BF code that works in two ways

Challenge In this challenge, we will use a language that is very similar to Brainfuck but slightly different. This variant of BF does not have any input and output commands; instead, it simply takes …
Bubbler's user avatar
  • 78.4k