palindrome.ex

defmodule Paralindrome do
  def are_palindromes?(list) do
    parent_process = self
    Enum.map(list, fn (word) ->
      spawn(fn ->
        send parent_process, {self, word, is_palindrome?(word) }
      end)
    end)
    |> Enum.each fn (process_id) ->
      receive do
        {^process_id, word, status} ->
          IO.puts "#{word} is a Palindrome: #{status}"
      end
    end
  end

  def is_palindrome?(word) do
    word == String.reverse(word)
  end
end

Paralindrome.are_palindromes?(["mom", "hat"])

palindrome_task.ex

defmodule Paralindrome do
  def are_palindromes?(list) do
    Enum.map(list, fn (word) ->
      Task.async(fn -> {word, is_palindrome?(word) } end)
    end)
    |> Enum.each fn (task) ->
      case Task.await(task) do
        {word, true} ->
          IO.puts "#{word} is a Palindrome"
        _ -> nil
      end
    end
  end

  def is_palindrome?(word) do
    word == String.reverse(word)
  end
end

list = File.read!("/usr/share/dict/words") |> String.split("\n")
Paralindrome.are_palindromes?(list)