need_for_speed

elixir/need-for-speed/lib/need_for_speed/race.ex

@@ -0,0 +1,24 @@
+defmodule NeedForSpeed.Race do
+  defstruct [
+    :title,
+    :total_distance_in_meters,
+    cars: []
+  ]
+
+  def display_status(%NeedForSpeed.Race{} = race) do
+    cond do
+      Enum.any?(race.cars, &(&1.distance_driven_in_meters >= race.total_distance_in_meters)) ->
+        "Finished"
+
+      Enum.any?(race.cars, &(&1.distance_driven_in_meters > 0)) ->
+        "In Progress"
+
+      true ->
+        "Not Started"
+    end
+  end
+
+  def display_distance(%NeedForSpeed.Race{total_distance_in_meters: d}) do
+    "#{d} meters"
+  end
+end

elixir/need-for-speed/lib/need_for_speed/remote_control_car.ex

@@ -0,0 +1,24 @@
+defmodule NeedForSpeed.RemoteControlCar do
+  defstruct [
+    :nickname,
+    :color,
+    battery_percentage: 100,
+    distance_driven_in_meters: 0
+  ]
+
+  def new(color, nickname) when color in [:red, :blue, :green] do
+    %NeedForSpeed.RemoteControlCar{nickname: nickname, color: color}
+  end
+
+  def display_distance(%NeedForSpeed.RemoteControlCar{distance_driven_in_meters: d}) do
+    "#{d} meters"
+  end
+
+  def display_battery(%NeedForSpeed.RemoteControlCar{battery_percentage: 0}) do
+    "Battery empty"
+  end
+
+  def display_battery(%NeedForSpeed.RemoteControlCar{battery_percentage: b}) do
+    "Battery at #{b}%"
+  end
+end