.NET Разработчик. Страница 29

void Process(double[] arr)
{
  Parallel.Invoke(
    () => ProcessPartial(arr, 0, arr.Length/2),
    () => ProcessPartial(arr, arr.Length/2, arr.Length)
  );
}
void ProcessPartial(double[] array, int begin, int end)
{
  // Обработка, интенсивно использующая процессор...
}

void DoActions(Action action)
{
  Action[] actions = Enumerable.Repeat(action, 20).ToArray();
  Parallel.Invoke(actions);
}

void DoActions(Action action, CancellationToken token)
{
  Action[] actions = Enumerable.Repeat(action, 20).ToArray();
  Parallel.Invoke(
    new ParallelOptions { CancellationToken = token },
    actions);
}

public delegate void SpeedChangedEventHandler(object sender, double speed);

public class Car
{
  public event SpeedChangedEventHandler SpeedChanged;
    
  public void Accelerate()
  {
    var speed = …;
    …
    
    OnSpeedChanged(speed);
  }
  
  protected virtual void OnSpeedChanged(double speed)
  {
    SpeedChanged?.Invoke(this, speed);
  }
}

public class Tracker
{
  private double currentSpeed = 0;
    
  public Tracker(Car car)
  {
    car.SpeedChanged += (o, speed) =>
    {
      currentSpeed = speed;
      ShowOnScreen(speed);
    };
        
    ShowOnScreen(currentSpeed); // здесь будет 0
  }
  …
}

public record CarState(double speed, double temperature, …);

public class Car
{
  public CarState Snapshot { get; private set; } = new CarState(0,0,…);

  public void Accelerate()
  {
    var speed = …;
    …
    Snapshot = Snapshot with { Speed = speed };

    OnSpeedChanged(Snapshot.Speed);
  }
  …
}

public Tracker(Car car)
{
  currentSpeed = car.Snapshot.Speed;
  car.SpeedChanged += (o, speed) =>
  {
   …
  }
}