Tried solving today's #adventofcode using only regex, and it turns out that it's not easy to match a string containing any character consecutively repeated exactly 2 times (but no more).
For example, I want to match "abccd", but not "abcccd".
@ihabunek needs backreferences and {} and NOT but it has been a while since I got crazy creative in regex
QOTO: Question Others to Teach Ourselves An inclusive, Academic Freedom, instance All cultures welcome. Hate speech and harassment strictly forbidden.