Parallel map

pmap.exs

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