Imposes a restriction on the source code used to solve the challenge, for example, having no numbers in the source code.
Challenges with the restricted-source tag impose a restriction on the source code for an answer.
- Your code is not allowed to have one or multiple specified characters in it (e.g. numbers, vowels, ...).
- Your code is not allowed to have repeated characters in it.
- All characters in your code have to be repeated n times.
- Your code has to be palindromic.
Note that the restricted-source tag should be used with caution -- adding restricted-source to an otherwise trivial challenge does not necessarily make it interesting. Generally, a restricted-source challenge should be a task of moderate complexity along with a clear, simple and relevant restriction.