在Visual Studio安装项目,有占位符\宏属性,如[ProgramFilesFolder]和[ProductName].我在哪里可以看到所有这些属性及其价值?我下载了Orca,但我无法从中找到这些信息.
来自O'Reilly的C#in a Nutshell:
class Foo
{
int _answer;
bool _complete;
void A()
{
_answer = 123;
Thread.MemoryBarrier(); // Barrier 1
_complete = true;
Thread.MemoryBarrier(); // Barrier 2
}
void B()
{
Thread.MemoryBarrier(); // Barrier 3
if (_complete)
{
Thread.MemoryBarrier(); // Barrier 4
Console.WriteLine (_answer);
}
}
}
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假设方法A和B在不同的线程上并发运行:
作者说:"障碍1和4阻止这个例子写"0".障碍2和3提供了新鲜度保证:他们确保如果B在A之后运行,则读取_complete将评估为真.
我的问题是:
我想实例化一个函数指针:
static void GetProc (out function f) {
auto full = demangle(f.mangleof);
auto name = full[full.lastIndexOf('.')+1..$];
f = cast(typeof(f)) GetProcAddress(hModule,name.toStringz);
}
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但编译器不会让我使用函数类型变量(out function f).我试过用Object但显然function不是Object(怎么回事?).那么,我如何传递functionas ref/ outvariable(不使用template/ mixin,它会掩盖代码并迫使我添加许多typeof语句......)?
当使用MSTest进行单元测试时,我创建了一个WPF窗口.此窗口关闭时,Visual Studio显示InvalidComObjectException:
COM object that has been separated from its underlying RCW cannot be used.
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它在退出后引发[TestMethod],并且堆栈仅包含外部代码(否InnerException).这就是我所拥有的:
StackTrace:
at System.Windows.Input.TextServicesContext.StopTransitoryExtension()
at System.Windows.Input.TextServicesContext.Uninitialize(Boolean appDomainShutdown)
at System.Windows.Input.TextServicesContext.TextServicesContextShutDownListener.OnShutDown(Object target, Object sender, EventArgs e)
at MS.Internal.ShutDownListener.HandleShutDown(Object sender, EventArgs e)
DeclaringType:
{Name = "TextServicesContext" FullName = "System.Windows.Input.TextServicesContext"}
Assembly:
{PresentationCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35}
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这是创建窗口的代码:
var myWindow = new SomeWindow(errors);
myWindow.ShowDialog();
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该窗口包含两个ListViews,其中包含一些文本元素和复选框
JTable的JComboBox细胞编辑器中打开列表时,即使点击了组合框外已设置的值.此外,一旦选择了某个值,下次打开选择时,该值将成为默认值:
这是代码:
public class Main {
public static void main(String[] args) {
new QuestionFrame();
}
}
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QuestionFrame:
import javax.swing.*;
import javax.swing.table.AbstractTableModel;
import java.awt.*;
class QuestionFrame extends JFrame {
QuestionFrame(){
class Model {
int num;
private Model(int n) { num = n; }
}
final Model[] model = {new Model(9), new Model(8), new Model(7)};
JPanel panel = new JPanel(new BorderLayout());
JTable table = new JTable(new AbstractTableModel(){
@Override public int getRowCount() { return model.length; }
@Override public int …Run Code Online (Sandbox Code Playgroud) 我有这个 JSON:
'{
"fibo": {
"2": { "hi": "there" },
"8": { "and": "you?" }
"5": { "well": "doing fine" },
"3": { "what": "is hap?" },
}
}'
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例如,我想以{ "what": "is hap?" }最简单的方式提取最后一个元素(对象)(最好是带管道的单行,而不用foreach-ing 它)。
我试过:
'{
"fibo": {
"2": { "hi": "there" },
"8": { "and": "you?" }
"5": { "well": "doing fine" },
"3": { "what": "is hap?" },
}
}' | ConvertFrom-Json | select { $_.fibo } | select -Last 1
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但select …
由于使用Moq不可能模拟开放泛型类型,因此创建实际的模拟是不可避免的。这是我最终使用的最小模拟:
internal interface ILoggerMock {
public List<(LogLevel logLevel, string msg)> Logs { get; }
}
public class LoggerMock<T> : ILoggerMock, ILogger<T> {
public List<(LogLevel logLevel, string msg)> Logs { get; } = new();
public IDisposable BeginScope<TState>(TState state) => throw new NotImplementedException();
public bool IsEnabled(LogLevel logLevel) => throw new NotImplementedException();
public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter) {
var formattedLogMessage = formatter(state, exception);
Logs.Add((logLevel, formattedLogMessage));
}
}
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通过此注册:
var myServiceProvider = new …Run Code Online (Sandbox Code Playgroud) Terraform 的文档没有提及任何Description字段。谷歌搜索都不是(这首先是有问题的,因为这Description是超级常见的词)。
我尝试添加Description Tag,但它没有显示在CloudFront > 发行版页面Description的列中
要使用LAN启用内核调试(我使用适当的LAN板),根据MSDN,我应该键入:
bcdedit /dbgsettings NET HOSTIP:123.123.123.123 PORT:50123
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但是我收到一个错误:
The debugger type specified is not valid.
...
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怎么来的(Win7x64)?
我有以下功能:
uint_fast32_t write(const std::vector<std::byte>& bytes_to_write) const
{
...
}
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我想用可变数量std::bytes 来称呼它:
std::byte low_byte { 0 };
std::byte hi_byte{ GPIO_PINS::GPIOH0 | GPIO_PINS::GPIOH3 };
write({
INST::SET_LOW,
low_byte,
0xFB,
INST::SET_HI,
hi_byte,
0xFF
});
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(INST和GPIO_PINS是enum class : byte-介意的区别byte(实际上unsigned char),并std::byte在这方面。)
但这不会编译。我必须按以下方式调整通话:
write({
std::byte(INST::SET_LOW),
low_byte,
std::byte(0xFB),
std::byte(INST::SET_HI),
hi_byte,
std::byte(0xFF)
});
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我的问题是,是否有一种方法可以消除对std::byte构造函数(或static_cast)的需求?
也许一些隐式操作符重载或类似?
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