defmodule Concurrent do
  @moduledoc """
  Enum with concurrency by using Elixir Task
  """

  @doc """
  Hello world.

  ## Examples

      iex> Concurrent.map([1, 2, 3], & &1 * &1)
      [1, 4, 9]

  """
  def map(enum, fun, options \\ [timeout: 5_000]) do
    enum
    |> Enum.map(&Task.async(fn -> fun.(&1) end))
    |> Enum.map(&Task.await(&1, options[:timeout]))
  end
end