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defmodule Day7 do | |
def part1(), do: | |
root(read_programs_map()).name | |
def part2() do | |
programs_map = read_programs_map() | |
{:error, {:unbalanced, unbalanced_info}} = total_weight(programs_map, root(programs_map)) | |
unbalanced_info.program.weight + unbalanced_info.missing_weight | |
end |
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defmodule Day6 do | |
def part1(banks), do: | |
run_debugger(banks).steps | |
def part2(banks), do: | |
run_debugger(banks).cycle_size | |
defp run_debugger(banks), do: | |
debug_loop(banks, length(banks), %{}, 0) |
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defmodule Day5 do | |
def moves(instruction_changer), do: | |
File.stream!("input.txt") | |
|> Stream.map(&String.trim/1) | |
|> Stream.map(&String.to_integer/1) | |
|> maze_path(instruction_changer) | |
|> Enum.count() | |
def instruction_change_1(instruction), do: instruction + 1 |
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# http://adventofcode.com/2017/day/4 | |
defmodule Day4 do | |
def part1(), do: | |
passphrases() | |
|> Stream.map(&words/1) | |
|> Stream.reject(&any_duplicate?/1) | |
|> Enum.count() | |
def part2(), do: |
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# http://adventofcode.com/2017/day/3 | |
defmodule Day3 do | |
require Integer | |
def part1(square) do | |
final_point = | |
memory_points() | |
|> Stream.drop_while(&(&1.square != square)) | |
|> Enum.take(1) |
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# http://adventofcode.com/2017/day/2 | |
defmodule Day2 do | |
def checksum1(rows), do: | |
rows | |
|> Enum.map(&row_checksum1/1) | |
|> Enum.sum() | |
defp row_checksum1(row) do | |
{min, max} = |
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# http://adventofcode.com/2017/day/1 | |
defmodule Day1 do | |
def sum1(digits), do: | |
digits | |
|> Stream.concat(Enum.take(digits, 1)) | |
|> Stream.chunk_every(2, 1, :discard) | |
|> Stream.filter(&match?([el, el], &1)) | |
|> Stream.map(&hd(&1)) | |
|> Enum.sum() |
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defmodule Worker1 do | |
def start_link() do | |
Task.start_link(fn -> | |
Stream.repeatedly(fn -> :rand.uniform(1000) end) | |
|> Stream.each(&:timer.sleep/1) | |
|> Stream.each(fn _ -> IO.puts "worker 1" end) | |
|> Stream.run() | |
end) | |
end | |
end |
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defmodule Fun2MsTest do | |
@compile {:parse_transform, :ms_transform} | |
def test do | |
match_spec = :ets.fun2ms(fn({:foo, bar} = el) when bar == :baz -> el end) | |
IO.inspect match_spec | |
end | |
end | |
Fun2MsTest.test |
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defmodule Primes do | |
# Basic implementation of an infinite prime generator, as explained at | |
# http://www.cs.hmc.edu/~oneill/papers/Sieve-JFP.pdf | |
def new do | |
%{composites: HashDict.new, current: 2} | |
end | |
def next(%{composites: composites, current: current} = sieve) do | |
case HashDict.get(composites, current) do |