Tramp data in Elixir

foo.exs

defmodule Foo do
  def execute_command(data, coeff) do
    data = prepare_data(data, coeff)
    persist(data.name, coeff)
  end

  def prepare_data(data, coeff) do
    w = calculate_w(data.x, data.y, data.z, coeff)
    %{
      name: "foo",
      weight: w
    }
  end

  def calculate_w(x, y, z, coeff) do
    x * y * z * coeff
  end

  def persist(name, w) do
    # save data
    IO.inspect {name, w}, label: "saving"
    :ok
  end

  def main do
    data = %{
      name: "foo",
      x: 10, y: 20, z: 30
    }
    
    # read from ENV
    coeff = 5

    execute_command(data, coeff)
  end
end

Foo.main()