小编cdn*_*cdn的帖子

在命令行上执行cqlsh.bat时,我收到以下消息

Connection error: ('Unable to connect to any servers', {'127.0.0.1': ProtocolError("cql_version '3.3.0' is not supported by remote (w/ native protocol). Supported versions: [u'3.2.0']",)})

我正在运行Python版本2.7.10以及Cassandra版本2.2.1.不确定它是否相关但是当我启动Cassandra服务器时,我需要在PowerShell上运行"Set-ExecutionPolicy Unrestricted",否则它不起作用.

我使用Html.TextBoxFor接受输入声明,因为@Html.TextBoxFor(model => model.StartDate, new { type = "datetime-local", @class = "form-control", @style = "height:34px;width:230px" })有两个这两个都通过AJAX将它们的值传递给C#控制器函数,它执行以下操作

DateTime ResourceStart = DateTime.ParseExact(resource_start, "dd/MM/yyyyTHH:mm", CultureInfo.InvariantCulture);

DateTime ResourceDue = DateTime.ParseExact(resource_due, "dd/MM/yyyyTHH:mm", CultureInfo.InvariantCulture);

的值resource_start和resource_due为"2016-12-02T09:30"和:分别为"2016-12-12T12 50".

以下是程序崩溃时的异常细节.

System.FormatException was unhandled by user code
  HResult=-2146233033
  Message=String was not recognized as a valid DateTime.
  Source=mscorlib
  StackTrace:
       at System.DateTimeParse.ParseExact(String s, String format, DateTimeFormatInfo dtfi, DateTimeStyles style)
       at System.DateTime.ParseExact(String s, String format, IFormatProvider provider)
       at ITPortal.Areas.ITWorkstream.Controllers.WorkstreamController.CreateResource(Int32 task_id, String resource_start, String resource_due) in c:\Work\ITPortal\ITPortal-DEV\ITPortal\Areas\ITWorkstream\Controllers\WorkstreamController.cs:line 247
       at …

我有一个std::unique_ptr<std::vector<int>>，我正在尝试使用运算符访问一个元素[]。如何访问 中包含的向量的特定索引std::unique_ptr？

#include <memory>
#include <vector>

int main()
{
    std::unique_ptr<std::vector<int>> x;
    x[0] = 1;
}

谢谢