🗓️Day 19

Friday, 26 August 2022 - Day 19 of Exhort August 2022 - Exercism (My Elixir Journey)

Exercises

• Need For Speed

Need For Speed

Exercise on Exercism | View my solution

Solution

Expand to see code (spoiler alert)

defmodule NeedForSpeed do
  alias NeedForSpeed.Race
  alias NeedForSpeed.RemoteControlCar, as: Car
  import IO, only: [puts: 1]
  import IO.ANSI, except: [color: 1]

  def print_race(%Race{} = race) do
    puts("""
    🏁 #{race.title} 🏁
    Status: #{Race.display_status(race)}
    Distance: #{Race.display_distance(race)}

    Contestants:
    """)

    race.cars
    |> Enum.sort_by(&(-1 * &1.distance_driven_in_meters))
    |> Enum.with_index()
    |> Enum.each(fn {car, index} -> print_car(car, index + 1) end)
  end

  defp print_car(%Car{} = car, index) do
    color = color(car)

    puts("""
      #{index}. #{color}#{car.nickname}#{default_color()}
      Distance: #{Car.display_distance(car)}
      Battery: #{Car.display_battery(car)}
    """)
  end

  defp color(%Car{} = car) do
    case car.color do
      :red -> red()
      :blue -> cyan()
      :green -> green()
    end
  end
end

View gist on GitHub

Notes

Interesting. Pretty short and fast. Learned a few things about aliases and imports. I still don't fully understand what is the difference between alias and import.

Overall progress

Progress