小编Har*_*Boy的帖子

我在SUSE Linux中有一个SQLite3数据库.

它像命令提示一样停留在命令提示符下:

sqlite> q
   ...> exit
   ...> .exit
   ...> quit
   ...> .quit

如何退出数据库？

我按照这里的示例:https://www.youtube.com/watch？v = MoMjIwGSFVQ并使用网络摄像头进行对象检测.

但我已经将我的网络摄像头转换为使用来自IP摄像机的rtsp流,我相信它正在流式传输H264 ,我现在注意到视频中有大约30秒的延迟,而且视频有时会停止启动.

这是执行主要处理的python代码:

import cv2
cap = cv2.VideoCapture("rtsp://192.168.200.1:5544/stream1")

# Running the tensorflow session
with detection_graph.as_default():
  with tf.Session(graph=detection_graph) as sess:
   ret = True
   while (ret):
      ret,image_np = cap.read()

      # Expand dimensions since the model expects images to have shape: [1, None, None, 3]
      image_np_expanded = np.expand_dims(image_np, axis=0)
      image_tensor = detection_graph.get_tensor_by_name('image_tensor:0')

      # Each box represents a part of the image where a particular object was detected.
      boxes = detection_graph.get_tensor_by_name('detection_boxes:0')

      # Each score …

在我的C#WinForms应用程序中,我有一个隐藏其默认控件的主窗口.

所以为了让我能够移动它,我将以下内容添加到主窗口:

    private const int WM_NCHITTEST = 0x84;
    private const int HTCLIENT = 0x1;
    private const int HTCAPTION = 0x2;
    private const int WM_NCLBUTTONDBLCLK = 0x00A3;

    protected override void WndProc(ref Message message)
    {
        if (message.Msg == WM_NCLBUTTONDBLCLK)
        {
            message.Result = IntPtr.Zero;
            return;
        }

        base.WndProc(ref message);

        //Allow window to move
        if (message.Msg == WM_NCHITTEST && (int)message.Result == HTCLIENT)
            message.Result = (IntPtr)HTCAPTION;
    }

我有一个WPF应用程序,我也隐藏了默认控件,我想做同样的事情.我看到主窗口是从'Window'派生的,所以上面的代码不起作用.我如何在WPF中执行此操作？

我有以下程序(我从http://blogs.msdn.com/b/csharpfaq/archive/2010/06/01/parallel-programming-in-net-framework-4-getting-started.aspx获得)使用Parallel.For循环拆分任务

class Program
{
    static void Main(string[] args)
    {
        var watch = Stopwatch.StartNew();


        Parallel.For(2, 20, (i) =>
        {
            var result = SumRootN(i);
            Console.WriteLine("root {0} : {1} ", i, result);
        });

        Console.WriteLine(watch.ElapsedMilliseconds);
        Console.ReadLine();
    }

    public static double SumRootN(int root)
    {
        double result = 0;
        for (int i = 1; i < 10000000; i++)
        {
            result += Math.Exp(Math.Log(i) / root);
        }
        return result;
    }
}

当我多次运行此测试时,我会得到以下时间:

1992年,2140年,1783年,1863年等等

我的第一个问题是,为什么时代总是不同？我每次都在进行完全相同的计算,但每次时间都不同.

现在,当我添加以下代码以使用我CPU上的所有可用处理器时:

        var parallelOptions = new ParallelOptions
        {
            MaxDegreeOfParallelism …

我有一个以毫秒为单位的起始时间点,如下所示:

using namespace std::chrono;
typedef time_point<system_clock, milliseconds> MyTimePoint;

MyTimePoint startTimePoint = time_point_cast<MyTimePoint::duration>(system_clock::time_point(steady_clock::now()));

现在我将有一定的小时数我要添加或减去startTimePoint.

int numHours = -5//or 5 etc (Can be a plus or minus number)

如何将这段时间添加到原始startTimePoint？

我有一个C#WPF页面并且在其上我放置了几个我希望像复选框一样的小图像(我有自己的自定义图像用于悬停和选定状态).

我这样手动更改图像:

<Image x:Name="Image_Custom" Source="/Images/checkcircle_off.png" Width="16" Height="16" HorizontalAlignment="Left"  Margin="30,107,0,0" VerticalAlignment="Top" MouseEnter="Image_Custom_MouseEnter" MouseLeave="Image_Custom_MouseLeave" MouseUp="Image_Custom_MouseUp" MouseLeftButtonDown="Image_Custom_MouseLeftButtonDown"/>


    private void Image_Custom_MouseEnter(object sender, MouseEventArgs e)
    {
        if (_selected == false)
        {
            var uriSource = new Uri("/Images/checkcircle_hover.png", UriKind.Relative);
            Image_Custom.Source = new BitmapImage(uriSource);
        }
    }

    private void Image_Custom_MouseLeave(object sender, MouseEventArgs e)
    {
        if (_selected == false)
        {
            var uriSource = new Uri("/Images/checkcircle_off.png", UriKind.Relative);
            Image_Custom.Source = new BitmapImage(uriSource);
        }
    }

    private void Image_Custom_MouseUp(object sender, MouseButtonEventArgs e)
    {
        if (_selected)
        {
            var uriSource = new Uri("/Images/checkcircle_off.png", UriKind.Relative);
            Image_Custom.Source = …

我需要重写一些使用windows WaitforSingleObject函数的代码.

myEvent = CreateEvent( NULL, FALSE, FALSE, szName );
WaitForSingleObject( myEvent, nMilliseconds );

我需要等待事件或超时发生.在直接的C++中是否有相当于这个？

我使用的是STL C++ 11而不是其他任何库,例如boost.

我有一个C#.net网络应用程序,用于将视频上传到Youtube.这工作大约6个月前,但现在已停止工作.当我在本地计算机上通过Visual Studio启动我的网站时,以下代码会挂起:

     UserCredential credential;
    using (var auth_stream = new FileStream(Server.MapPath("~/YouTube/client_secrets.json"), FileMode.Open, FileAccess.Read))
    {
        credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
            GoogleClientSecrets.Load(auth_stream).Secrets,
            // This OAuth 2.0 access scope allows an application to upload files to the
            // authenticated user's YouTube channel, but doesn't allow other types of access.
            new[] { YouTubeService.Scope.YoutubeUpload },
            "user",
            CancellationToken.None
        );
    }

在查看堆栈溢出的其他帖子之后我也尝试了以下内容:

     UserCredential credentialS;
     using (var auth_stream = new FileStream(Server.MapPath("~/YouTube/client_secrets.json"), FileMode.Open, FileAccess.Read))
     {
         credentialS = await GoogleWebAuthorizationBroker.AuthorizeAsync(
             new ClientSecrets
             {
                 ClientId = "blahblah-myDetailsBlahBLah.apps.googleusercontent.com",
                 ClientSecret = "myClientSecret",
             },
             // This …

我在Windows 7上安装了VS2013和VS2015.

我有一个现有的C++ Dll项目正在建设正常但现在突然间它不会使用VS2015构建并给我错误:

LINK : fatal error LNK1104: cannot open file 'kernel32.lib'

从这篇文章:致命错误LNK1104:无法打开文件'kernel32.lib'我去找了kernel32.lib文件,它位于这里:

C:\Program Files (x86)\Windows Kits\8.1\Lib\winv6.3\um\x86

当我转到我的项目属性 - >链接器 - >输入并选择宏时,我看到这条路径确实存在:

我的平台工具集设置为Visual Studio 2013 - Windows XP(v120_xp),它始终设置为.

为什么我的项目突然停止建设？什么可能出错？

我有以下代码可以连接到站点：

int main()
{
    CURL *curl;
    CURLcode res;

    curl = curl_easy_init();

    if(curl)
    {
        curl_easy_setopt(curl, CURLOPT_URL, "https://192.168.200.115:8080/appliances");
        curl_easy_setopt(curl, CURLOPT_USERNAME, "myusername");
        curl_easy_setopt(curl, CURLOPT_PASSWORD, "mypassword");
        curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC); 

        // Perform the request, res will get the return code
        res = curl_easy_perform(curl);

        // Check for errors
        if(res != CURLE_OK)
        {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
        }

        //always cleanup
        curl_easy_cleanup(curl);
    }

    return 0;
}

运行时出现错误：对等证书无法使用给定的 ca 证书进行身份验证

谷歌搜索后，我发现我必须添加以下行：

curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);

但是现在我收到错误消息：ssl peer certificate or ssh remote key is not ok

我试过添加：

curl_easy_setopt(curl, …