Advent of code - Day 1

day_one.ex

defmodule ElixirPlayground.DayOne do

  @input "./lib/elixir_playground/input/day1.txt"

  defp parseInput do
    @input
    |> File.read!
    |> String.trim
    |> Kernel.to_charlist
  end
  
  def sumDuplicates do
    parseInput()
    |> (fn a -> a ++ Enum.take(a, 1) end).()
    |> Enum.chunk_every(2,1,:discard)
    |> Enum.filter(fn [a,b] -> a == b end)
    |> Enum.map( fn [a,_] -> a end)
    |> Enum.sum
  end
end