for aoc day 4, i just did it today, instead of doing it right when it came out. it was kinda fun to just do it as slow as i wanted and take time to learn more about

I haven't really used nim templates that much in the past, I can't belive I can get away with this:

template assign(p: Passport, a: untyped, b: bool) =
if b:
p.a = a
p.invalid = true

where `a` can function as both the symbol for the field name *and* the value 🤯

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