guitarrapc

void Main()
{
    var p1 = new Position { X = 2, Y = 0, };
    var p2 = new Position { X = 1, Y = 2, };
    var p3 = new Position();
    var p4 = new Position { X = 5, Y = 10, };
    var p5 = new Position { X = 50, };
    var p6 = new Position { Y = -10, };
    G(p1).Dump(); // 2
    G(p2).Dump(); // 0

guitarrapc

void Main()
{
    var hoge = GetHoge();
}

public IEnumerable<IHoge> GetHoge()
{
    var hoge = Enumerable.Range(0, 1).Select(x => new Hoge());
    return hoge;
}

guitarrapc

grpc/grpc をSource ビルドするメモ

ビルドする場合の事前作業

Windows

• Grpc.Core や Grpc.Core.Api のみならこれだけでok
  • .NET Core SDK のインストール
  • VSビルドする場合、VS2019、.NET Framework 4.6.2 targeting pack をインストール
• csharp_ext だと、cmake か ninja あるいは bazel ビルドが必要。

guitarrapc

    public static class Easing
    {
        public static double Linear(double currentTime, double startValue, double changeValue, double duration) => changeValue * currentTime / duration + startValue;

        // Quadratic (x2)
        public static double InQuadratic(double currentTime, double startValue, double changeValue, double duration)
        {
            currentTime /= duration;
            return changeValue * Math.Pow(currentTime, 2) + startValue;
        }

guitarrapc

void Main()
{
    var random = new Random();
    var data = Enumerable.Range(0, 10000)
        .Select(x => TimeSpan.FromMilliseconds(random.Next(1, 500)))
        .OrderBy(x => x)
        .ToArray();

    var fastest = data[0];
    var slowest = data[^1];

guitarrapc

void Main()
{
    var random = new Random();
    var data = Enumerable.Range(0, 10000)
        .Select(x => TimeSpan.FromMilliseconds(random.Next(1, 500)))
        .OrderBy(x => x)
        .ToArray();
    Latencies(data).Dump();
}

guitarrapc

async Task Main()
{
    var sw = Stopwatch.StartNew();
    // pool size = 50, runnning for 20sec
    var cts = new CancellationTokenSource(TimeSpan.FromSeconds(20));
    using var pool = new TaskPool<int>(50, cts.Token);
    while (!cts.Token.IsCancellationRequested)
    {
        pool.RegisterAsync(() => SendAsync(1)).FireAndForget();
    }

guitarrapc

void Main()
{
    Durations.FromString("10d").Dump();
    Durations.FromString("10h").Dump();
    Durations.FromString("10m").Dump();
    Durations.FromString("10s").Dump();
    Durations.FromString("100d10h10m10s").Dump();
    Durations.FromString("100d10h10s").Dump();
    Durations.FromString("0").Dump();

guitarrapc

version: "3"
services:
  mysql:
    image: mysql:5.7.12
    ports:
      - 3506:3306
    environment:
      MYSQL_ROOT_PASSWORD: root

guitarrapc

void Main()
{
    var summary = BenchmarkRunner.Run<StringOutput>();
}
[SimpleJob(RuntimeMoniker.NetCoreApp30, baseline: true)]
[SimpleJob(RuntimeMoniker.NetCoreApp31)]
[SimpleJob(RuntimeMoniker.NetCoreApp50)]
[RPlotExporter]
[MemoryDiagnoser]
public class StringOutput