26 lines
811 B
Elixir
26 lines
811 B
Elixir
defmodule RemoteControlCar do
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@enforce_keys [:nickname]
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defstruct [:nickname, battery_percentage: 100, distance_driven_in_meters: 0]
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def new(nickname \\ "none") do
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%RemoteControlCar{nickname: nickname}
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end
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def display_distance(%RemoteControlCar{} = remote_car) do
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"#{remote_car.distance_driven_in_meters} meters"
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end
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def display_battery(%RemoteControlCar{} = car) do
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if car.battery_percentage > 0 do
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"Battery at #{car.battery_percentage}%"
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else
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"Battery empty"
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end
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end
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def drive(%RemoteControlCar{} = remote_car) when remote_car.battery_percentage > 0 do
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%{remote_car | battery_percentage: remote_car.battery_percentage - 1, distance_driven_in_meters: remote_car.distance_driven_in_meters + 20}
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end
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def drive(%RemoteControlCar{} = car), do: car
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end
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