guitarrapc

// using Amazon;
// using Amazon.Runtime;
// using Amazon.SQS;
// using Amazon.SQS.Model;
// using System.Threading.Tasks;

async Task Main()
{
    // for LocalStack
    var credentials = new Amazon.Runtime.BasicAWSCredentials("test", "test");

guitarrapc

apiVersion: apps/v1
kind: Deployment
metadata:
  name: grpcserver
spec:
  selector:
    matchLabels:
      app: grpcserver
  replicas: 1
  template:

guitarrapc

async Task Main()
{
    var summary = BenchmarkRunner.Run<BenchmarkTarget>();
//    var sw = ValueStopwatch.StartNew();
//    await Task.Delay(1 * 1000);
//    sw.GetElapsedTime().Dump();
//    await Task.Delay(1 * 1000);
//    sw.GetElapsedTime().Dump();
//    await Task.Delay(1 * 1000);
//    sw.GetElapsedTime().Dump();

guitarrapc

void Main()
{
    // ラベル (http:) + コメント (//google.com) になる
    http://google.com

    // 条件: 何かしらの文or式が下にないとだめ
    for (var i = 0; i < 10; i++) {}
}

guitarrapc

Name
----
%
?
ac
asnp
cat
cd
CFS

guitarrapc

using StackExchange.Redis;
using StackExchange.Redis.KeyspaceIsolation;

var connectionStrings = "localhost:6379,ssl=false,password=password";
var connection = ConnectionMultiplexer.Connect(connectionStrings);

// Prefix は DB に対してつけることで透過的に処理される
//var db = connection.GetDatabase(); // Prefix なし
//var db = connection.GetDatabase().WithKeyPrefix(""); // Prefix なしと同じ
var db = connection.GetDatabase().WithKeyPrefix("PREFIX:"); // Prefix あり

guitarrapc

async Task Main()
{
	using var cts = new CancellationTokenSource();
	
	var host = "127.0.0.1";
	var port = 8125;

	using var client = new Client(host, port);
	using var server = new UdpServer(host, port)
	{

guitarrapc

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>

guitarrapc

This is ReDos checking for .NET C#.

Based on Backtracking in .NET Regular Expressions | Microsoft Learn and WEB+BDB PRESS Vol.130.

In C#, Regex engine implement with VM (NFA) so develop has responsibility for it's quality of matching. .NET 7 introduce opt-in DFA Regex engine with RegexOptions.NonBackTracking.

See [Regular Expression behavior | Microsoft Learn)[https://learn.microsoft.com/en-us/dotnet/standard/base-types/details-of-regular-expression-behavior] for why .NET Regex is using NFA.

guitarrapc

CLIBS = ""

foo:
	@echo "CLIBS is '${CLIBS}'"