exit

How should I quit a Qt Program, e.g when loading a data file, and discovered file corruption, and user need to quit this app or re-initiate data file? Should I: call exit(EXIT_FAILURE) call QApplication::quit() call QCoreApplication::quit() And difference between (2) and (3)? QApplication is derived from QCoreApplication and thereby inherits quit() which is a public slot of QCoreApplication , so there is no difference between QApplication::quit() and QCoreApplication::quit() . As we can read in the documentation of QCoreApplication::quit() it "tells the application to exit with return code 0

I'm writing a client-server program in Python with Tkinter. I need the server to keep track of the connected clients. For this, I would like to have the client send an automated message to the server after the exit button(the standard "X" in the corner) is clicked. How can I know when the user is exiting the program? Bryan Oakley You want to use the wm_protocol method of the toplevel window. Specifically, you are interested in the WM_DELETE_WINDOW protocol. If you use that method, it allows you to register a callback which is called when the window is being destroyed. Usage: root.protocol("WM

player_input = '' # This has to be initialized for the loop while player_input != 0: player_input = str(input('Roll or quit (r or q)')) if player_input == q: # This will break the loop if the player decides to quit print("Now let's see if I can beat your score of", player) break if player_input != r: print('invalid choice, try again') if player_input ==r: roll= randint (1,8) player +=roll #(+= sign helps to keep track of score) print('You rolled is ' + str(roll)) if roll ==1: print('You Lose :)') sys.exit break I am trying to tell the program to exit if roll == 1 but nothing is happening and

I need to delete some certain files, then user closes program in WPF. So I tried MDSN code from here http://msdn.microsoft.com/en-us/library/system.windows.application.exit.aspx this way: this code located here App.xml.cs public partial class App : Application { void App_Exit(object sender, ExitEventArgs e) { MessageBox.Show("File deleted"); var systemPath = System.Environment.GetFolderPath( Environment.SpecialFolder.CommonApplicationData); var _directoryName1 = Path.Combine(systemPath, "RadiolocationQ"); var temp_file = Path.Combine(_directoryName1, "temp.ini"); if (File.Exists(temp1_file)) {

I am looking for the R equivalent of linux/POSIX exit(n) which will halt the process with exit code n, signaling to a parent process that an error had occurred. Does R have such a facility? It's an argument to quit() . See ?quit . Arguments : status: the (numerical) error status to be returned to the operating system, where relevant. Conventionally ‘0’ indicates successful completion. Details : Some error statuses are used by R itself. The default error handler for non-interactive use effectively calls ‘q("no", 1, FALSE)’ and returns error code 1. Error status 2 is used for R ‘suicide’, that

Here is a simple webserver I am working on var server = require("http").createServer(function(req,resp) { resp.writeHead(200,{"Content-Type":"text/plain"}) resp.write("hi") resp.end() server.close() }) server.listen(80, 'localhost') // The shortest webserver you ever did see! Thanks to Node.JS :) Works great except for keep-alive. When the first request comes in, server.close gets called. But the process does not end. Actually the TCP connection is still open which allows another request to come through which is what I am trying to avoid. How can I close existing keep-alive connections? You