Evil By Design
99
Transcript of Evil By Design
type Box = | Yellow | Green | Red | Blue | White | Purple
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type RandomNumber = | Num1 | Num2 | Num3 | Num4 | Num5 | Num6
match rnd with| Num1 -> Yellow | Num2 -> Green| Num3 -> Red| Num4 -> Blue | Num5 -> White| Num6 -> Purple
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Lose
Lose
Win!
Lose
Lose
Lose
type BoxValue = | Win of Multiplier | Loss
and Multiplier = decimal
match box with| Red -> Win 6M| _ -> Loss
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Lose
Lose
Win!
Lose
Lose
Lose
let box = rng() |> toBoxlet value = box |> toValue
{ Box = box; Value = value }
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Lose
Lose
Win!
Lose
Lose
Lose
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Lose
Lose
Win!
Lose
Lose
Lose
let run times f =[ 1 .. times ] |> Seq.map(fun _ -> f())
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1/6
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1/6
let payout bets wins = match bets with| 0M -> 1M| _ -> wins / bets
let houseEdge bets wins = match wins with| 0M -> 1M| _ -> bets / wins
House edge
0%
Payout
100%
match box with| Red -> Win 5M| _ -> Loss
House edge
16%
Payout
84%
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Lose
Lose
Win!
Lose
Lose
Lose
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Lose
Lose
Win!
Lose
Lose
Lose
match rnd with| Num1 | Num2 -> Green | Num3 -> Red| Num4 | Num5 | Num6 -> Blue
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2/6
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0/6
0/6
House edge
16%
Payout
84%
public interface IStatefulAggregate<TState>{
TState State();}
public interface IEventRecordingAggregate{
IEnumerable<object> Events();}
new Scenario<Player, PlayerState>().Given(() => Player.Register("1", "jef")).When(sut => sut.Lock()).ThenState(new PlayerState(){ Id = "1", Locked = true, Nickname = "jef" }).ThenEvent(new PlayerRegistered("1", "jef")).ThenEvent(new PlayerLocked("1")).Run();
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