Advent of Code 2023

[Johannes Miesenhardt]

On Sunday, 3 December 2023 at 14:51:37 UTC, Siarhei Siamashka 
wrote:
> [...]

Thanks, this is super helpful. I have one other question, in the 
solution you posted and also the one I posted in the discord 
today. I was required to use byLineCopy. I first used byLine but 
I for some reason that I can't really explain only got the last 
line from that. I switched to byLineCopy because I saw it in 
other peoples solution and that magically fixed all problems I 
had. What exactly happened here?