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#adventofcode
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2020-12-21
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Vincent Cantin18:12:35

4 days to go !

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Average-user18:12:26

Tried some Common Lisp for today, spent really long time debugging. The problem was that mapcan was doing some sideffect and modifying my list, something that would have never happend with mapcat , I still don't quite understand why, but I had to switch (mapcan #'f xs) to (apply #'concatenate 'list (mapcar #'f xs))

Vincent Cantin07:12:43

I would love to join the conversation, but I don’t know CL - sorry.