46 lines
1.2 KiB
Text
46 lines
1.2 KiB
Text
Day 6 Notes
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+--------+
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| Part 1 |
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+--------+
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$ elixir day6part1.exs
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6585
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Thoughts:
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So far I've read the whole file into memory. I initially did that here to get the answer
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quickly to preserve my Leaderboard position 🌟, butthen refactored to use File.stream!
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to parse the file line-by-line.
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This meant using Stream.chunk_by to sort into groups.
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Join all the answers together, and use Enum.frequencies/1 to count all the answers (discarding
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newlines).
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+--------+
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| Part 2 |
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+--------+
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$ elixir day6part2.exs
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3276
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Thoughts:
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Not stripping the newlines came in handy here, because I could use them to count how
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many people are in each group. Then I could just count the frequencies that were answered
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by the whole group, and finally sum those results.
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+------------------+
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| Overall Thoughts |
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+------------------+
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I didn't get an accurate time for this one due to having lunch between parts 1 and 2 🍝.
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Got the answer under an hour including lunch, but more like two hours including streaming
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the file and tidying up.
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Using Map.pop/2 to remove an element and return its value at the same time is probably the
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most notable thing here?
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I wonder if there's a more effective way to parse the stream dynamically and also strip off
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the new lines?
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