This is based upon the solution in the blog post: Java Single Instance Application. The solution uses the “Socket Technique”: With this technique we start listening on a port, only one process can listen on a socket so after first instance of our application binds itself to the socket other instances will get BindException, which … Read more
That’s a user specific setting. On many modern Linux systems, it’s UTF-8. On Macs, itâs MacRoman. In the US on Windows, it’s often CP1250, in Europe it’s CP1252. In China, you often find simplified chinese (Big5 or a GB*). But thatâs the system default, which each user can change at any time. Which is probably … Read more
It appears that a cross-platform file opening module does not yet exist, but you can rely on existing infrastructure of the popular systems. This snippet covers Windows, MacOS and Unix-like systems (Linux, FreeBSD, Solaris…): import os, sys, subprocess def open_file(filename): if sys.platform == “win32”: os.startfile(filename) else: opener = “open” if sys.platform == “darwin” else “xdg-open” … Read more
On Windows (at least), sys.setrecursionlimit isn’t the full story. The hard limit is on a per-thread basis and you need to call threading.stack_size and create a new thread once you reach a certain limit. (I think 1MB, but not sure) I’ve used this approach to increase it to a 64MB stack. import sys import threading … Read more
The signature is void setMethodCallHandler(Future<dynamic> handler(MethodCall call)), so we need to provide a function at the Dart end that returns Future<dynamic>, for example _channel.setMethodCallHandler(myUtilsHandler); Then implement the handler. This one handles two methods foo and bar returning respectively String and double. Future<dynamic> myUtilsHandler(MethodCall methodCall) async { switch (methodCall.method) { case ‘foo’: return ‘some string’; case … Read more
There is XULRunner, which let’s you build GUI apps like Firefox using JavaScript and XUL. It has a lot of extension to JavaScript though, using XPCOM. They also offer Prism which let’s you build web apps that work offline, sort of like AIR. Yahoo uses it for their Zimbra email desktop client.
See this article: http://en.wikipedia.org/wiki/List_of_random_number_generators This is the source code of glibc’s rand(): /* Reentrant random function from POSIX.1c. Copyright (C) 1996, 1999, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <[email protected]>, 1996. The GNU C Library is free software; you can redistribute it and/or modify … Read more
The error is caused because the program can’t find qwindows.dll qwindows.dll has to be in a folder named platforms so that the path from your executable to the dll is platforms/qwindows.dll Whereas this wasn’t enough in my case. I had also to add following line at the beginning of my main() QCoreApplication::addLibraryPath(“./”); Then everything worked.