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