The short answer is: nowhere. It is a relic of the past, where Microsoft intended developers to inherit all their custom exceptions from ApplicationException. Shortly after, they changed their mind and advised that custom exceptions should derive from the base Exception class. See Best Practices for Handling Exceptions on MSDN. One of the more widely … Read more
To give Network Service read permission on the EventLog/Security key (as suggested by Firenzi and royrules22) follow instructions from http://geekswithblogs.net/timh/archive/2005/10/05/56029.aspx Open the Registry Editor: Select Start then Run Enter regedt32 or regedit Navigate/expand to the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Security Right click on this entry and select Permissions Add the Network Service user Give it Read permission … Read more
You must catch the exception before it escapes the lambda: s = s.filter(a -> { try { return a.isActive(); } catch (IOException e) { throw new UncheckedIOException(e); } }); Consider the fact that the lambda isn’t evaluated at the place you write it, but at some completely unrelated place, within a JDK class. So that … Read more
The big difference is that try…catch will swallow the exception, hiding the fact that an error occurred. try..finally will run your cleanup code and then the exception will keep going, to be handled by something that knows what to do with it.
The code inside a finally block will get executed regardless of whether or not there is an exception. This comes in very handy when it comes to certain housekeeping functions you need to always run like closing connections. Now, I’m guessing your question is why you should do this: try { doSomething(); } catch { … Read more
Usually empty try-catch is a bad idea because you are silently swallowing an error condition and then continuing execution. Occasionally this may be the right thing to do, but often it’s a sign that a developer saw an exception, didn’t know what to do about it, and so used an empty catch to silence the … Read more
While debugging, Go to Debug -> Windows -> Call Stack
No, that’s the correct way to do it. This worked exactly as it should, something you can work from perhaps: using System; class Program { static void Main(string[] args) { System.AppDomain.CurrentDomain.UnhandledException += UnhandledExceptionTrapper; throw new Exception(“Kaboom”); } static void UnhandledExceptionTrapper(object sender, UnhandledExceptionEventArgs e) { Console.WriteLine(e.ExceptionObject.ToString()); Console.WriteLine(“Press Enter to continue”); Console.ReadLine(); Environment.Exit(1); } } Do keep … Read more
expect { some_method }.to raise_error RSpec 1 Syntax: lambda { some_method }.should raise_error See the documentation (for RSpec 1 syntax) and RSpec 2 documentation for more.
Here’s a complete small example that also includes a few other tricks: import sys import logging logger = logging.getLogger(__name__) handler = logging.StreamHandler(stream=sys.stdout) logger.addHandler(handler) def handle_exception(exc_type, exc_value, exc_traceback): if issubclass(exc_type, KeyboardInterrupt): sys.__excepthook__(exc_type, exc_value, exc_traceback) return logger.error(“Uncaught exception”, exc_info=(exc_type, exc_value, exc_traceback)) sys.excepthook = handle_exception if __name__ == “__main__”: raise RuntimeError(“Test unhandled”) Ignore KeyboardInterrupt so a console python … Read more