JeffreyZhao

using System.Collections.Generic;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using BenchmarkDotNet.Attributes;

namespace Dict
{
    public class DictionaryPerf
    {
        private Dictionary<int, int> _original;

JeffreyZhao

namespace HashTableDict
{
    using System.Collections;
    using System.Collections.Generic;

    public class Hashtable<TKey, TValue> : IDictionary<TKey, TValue>
        where TKey : class
        where TValue : class
    {
        private readonly Hashtable _ht = new Hashtable();

JeffreyZhao

打印表头

小明正在用JavaScript写一个日志分析程序。该程序会将日志转化为CSV文件，以便在Excel等应用中加载为一个表格。现在他在生成表头上遇到了困难。

他需要实现如下一个方法：

function printLine(array) {
    console.log(array.join(","));
}

JeffreyZhao

// 已知有如下可用类型

public interface ITextWriter {
  void Write(string text);
  void Write(string text, int startIndex, int count);
  void Write(char[] chars);
  void Write(char[] chars, int startIndex, int count);
}

// 需实现以下类型，输出value对应的字符串（不考虑本地化）。

JeffreyZhao

Build FAILED.

       "C:\projects\RazorEngine\RazorEngine-3.6.4\src\RazorEngine.sln" (Build t
       arget) (1) ->
       "C:\projects\RazorEngine\RazorEngine-3.6.4\src\test\Test.RazorEngine.Cor
       e\Test.RazorEngine.Core.csproj" (default target) (3) ->
       (CoreCompile target) ->
         IsolatedRazorEngineServiceTestFixture.cs(180,71): error CS0122: 'Razor
       Engine.Compilation.CompilerServiceBase.DynamicTemplateNamespace' is inac
       cessible due to its protection level [C:\projects\RazorEngine\RazorEngin

JeffreyZhao

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.Resources>
            <ControlTemplate TargetType="DataGridCell" x:Key="TestCell">
                <Border Name="PART_CellBorder" SnapsToDevicePixels="True" BorderBrush="Red" BorderThickness="2">
                    <ContentPresenter Name="PART_ContentPresenter" Content="{Binding}" />
                </Border>

JeffreyZhao

[MethodImpl(MethodImplOptions.NoInlining)]
static object UseBox(int num)
{
  return num;
}
 
private class IntWrapper
{
  public int Num;
}

JeffreyZhao

public class TicksToDateTimeCaller {

    private static DateTime TicksToDateTime(long ticks) {
        return new DateTime(ticks);
    }
    
    public TResult Call<T, TResult>(T arg) {
        return (TResult)(object)TicksToDateTime((long)(object)arg);
    }
}

JeffreyZhao

public static IEnumerable<TResult> SelectNonNull<TSource, TResult>(
  this IEnumerable<TSource> source, 
  Func<TSource, TResult> selector)
  where TResult : class
{
  return source != null ? source.Select(selector).Where(i => i != null) : Enumerable.Empty<TResult>();
}

JeffreyZhao

// 添加一个扩展方法

public static class WebClientExtensions {

    public static Task<string> DownloadStringAsync(
        this WebClient client,
        Uri uri,
        CancellationToken cancellationToken,
        int timeout) {