Physics Scenarios

alias BetterThanNASA.Physics
alias BetterThanNASA.MissionControl

Mission Metadata

mission_metadata = %{
  planets: MissionControl.list_planets(),
  operations: MissionControl.list_operations(),
  earth_gravity: MissionControl.gravity_for(:earth)
}

mission_metadata

%{operations: [:launch, :landing], planets: [:earth, :moon, :mars], earth_gravity: 9.807}

Successful Calculation

apollo_11_csm_landing = Physics.calculate_fuel(28_801, :landing, :earth)
IO.puts("Apollo 11 CSM Landing Fuel: #{apollo_11_csm_landing} kg")

Apollo 11 CSM Landing Fuel: 13447 kg

:ok

Not Enough Fuel

try do
  Physics.calculate_fuel(1, :landing, :moon)
rescue
  error ->
    IO.puts("ArithmeticError: #{error.message}")
end

ArithmeticError: not enough fuel

:ok

Quick Comparison

%{
  mission_metadata: mission_metadata,
  apollo_11_landing_fuel: apollo_11_csm_landing
}

%{
  mission_metadata: %{
    operations: [:launch, :landing],
    planets: [:earth, :moon, :mars],
    earth_gravity: 9.807
  },
  apollo_11_landing_fuel: 13447
}