46 lines
838 B
Elixir
46 lines
838 B
Elixir
defmodule Day4 do
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defp read_input do
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Path.expand('input', Path.dirname(__ENV__.file))
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|> File.read!()
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end
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defp parse_passports(text) do
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String.split(text, "\n\n")
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|> Enum.map(fn block ->
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fields = String.split(block)
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Enum.reduce(fields, %{}, fn field, passport ->
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[key, val] = String.split(field, ":")
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Map.put(passport, key, val)
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end)
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end)
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end
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@required_fields [
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"byr",
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"iyr",
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"eyr",
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"hgt",
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"hcl",
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"ecl",
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"pid"
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# "cid"
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]
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defp valid?(passport) do
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Enum.all?(@required_fields, fn field ->
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case Map.fetch(passport, field) do
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{:ok, _val} -> true
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:error -> false
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end
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end)
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end
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def part1 do
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read_input()
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|> parse_passports()
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|> Enum.count(&valid?/1)
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end
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end
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Day4.part1() |> IO.inspect()
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