48 lines
1.3 KiB
Text
48 lines
1.3 KiB
Text
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Day 4 Notes
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+--------+
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| Part 1 |
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+--------+
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$ elixir day4part1.exs
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210
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Thoughts:
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Parse each passport into a list of key-value pairs, and extract the keys.
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Not sure if there will be extra keys, so store required keys in a Mapset, which means I can use
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MapSet.subset to make sure all the required keys are present.
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Embedded enums are kind of ugly.
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Nice usage of Enum.into, IMO 🍠.
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+--------+
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| Part 2 |
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+--------+
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$ elixir day4part2.exs
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131
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Thoughts:
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Need the values too now, so refactor a bit to preserve them, storing each passport at a map.
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Can still use part 1 logic to filter out passports that have missing keys.
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- just pull out the keys and convert to a MapSet as before.
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Delete the cid key if present, since needs to be ignored.
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Validation code:
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Mostly just implementing the spec.
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Use regex for fiddly requirements.
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hgt was a bit annoying, really wanted to fail-fast if the regex failed to match the units,
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maybe will come back to that and think of a nicer way later.
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For valid?: Is there a nicer way to call a bunch of functions with the same argument and
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aggregate their results? 🤔
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+------------------+
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| Overall Thoughts |
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+------------------+
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Starting to take me longer now, about an hour for this one.
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Ended up not using Enum.reduce here, but every time I do use it I forget the order of the
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acc/item pair in the reducer function... 😩
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