1、类名 QMessageLogContext context 2、官方说明 The QMessageLogContext class provides additional information about a log message.The class provides information about the source code location a qDebug(), q
我们都知道判断list为空可以通过两种途径: 一、 1 List list = new ArrayList(2);2 System.out.println(list.size());//当list.size()==0时,说明该list为空 二、 1 List list = new ArrayList(2);2 System.out.println(list.isEmpty
rsOld = stmt.executeQuery("select * from randnumber");if(rsOld.next()){System.out.println("rsOld.next() is true");}else{System.out.println("rsOld.next() is false");}
var uri = new Uri (urlString);var nsurl = new NSUrl (uri.GetComponents (UriComponents.HttpRequestUrl, UriFormat.UriEscaped));UIApplication.SharedApplication.OpenUrl (nsurl);