pipeline_1.ex

defmodule Math do
  def times_three(n), do: n * 3
  def odd?(n), do: rem(n, 2) != 0
end


Enum.sum(
  Enum.filter(
    Enum.map(1..100_000, &(Math.times_three/1)), &(Math.odd?/1)))


1..100_000
  |> Enum.map(&(Math.times_three/1))
  |> Enum.filter(&(Math.odd?/1))
  |> Enum.sum