Parallel map

gistfile1.ex

defmodule Parallel do
  def pmap(collection, fun) do
    me = self

    collection
    |> Enum.map(fn (elem) ->
          spawn_link fn -> (send me, { self, fun.(elem) }) end
       end)
    |> Enum.map(fn (pid) ->
          receive do { ^pid, result } -> result end
       end)
  end
end