exception
How to catch multiple exceptions in one line? (in the “except” block)
From Python Documentation: An except clause may name multiple exceptions as a parenthesized tuple, for example except (IDontLikeYouException, YouAreBeingMeanException) as e: pass Or, for Python 2 only: except (IDontLikeYouException, YouAreBeingMeanException), e: pass Separating the exception from the variable with a comma will still work in Python 2.6 and 2.7, but is now deprecated and does … Read more
Unhandled Exception Handler in .NET 1.1
Oh, in Windows Forms you definitely should be able to get it to work. The only thing you have to watch out for is things happening on different threads. I have an old Code Project article here which should help: User Friendly Exception Handling
What to do of exceptions when implementing java.lang.Iterator
You should rethrow exception as custom runtime exception, not generic one, for instance SomethingBadRuntimeException. Also, you can try exception tunneling. And I’m assured that forcing client to deal with exceptions by making them checked is a bad practice. It just pollutes your code or forces to wrap exceptions with runtime ones or force to process … Read more
UIPopoverPresentationController should have a non-nil sourceView or barButtonItem set before the presentation occurs on iOS 9
You can create a popover presentation controller like this also and it may work – (IBAction)showPopup:(UIButton *)sender { ViewController *contentViewController = [[ViewController alloc] init]; contentViewController.preferredContentSize = CGSizeMake(200, 200); contentViewController.modalPresentationStyle = UIModalPresentationPopover; UIPopoverPresentationController *popoverpresentationController = contentViewController.popoverPresentationController; popoverpresentationController.delegate = self; popoverpresentationController.permittedArrowDirections = UIPopoverArrowDirectionUp; popoverpresentationController.sourceRect = sender.bounds; popoverpresentationController.sourceView = sender; [self presentViewController:contentViewController animated: YES completion: nil]; }
What does `at ReturnAddress` mean in Delphi?
ReturnAddress is the address to which VerifyWrite would have returned when finished. Raise Exception.Create… at ReturnAddress means that when the exception dialog is displayed, it would indicate the address of the exception as being at ReturnAddress. In other words, the exception message would read Exception <whatever> raised at <ReturnAddress>: <Exception Message>. Here is an excerpt … Read more
Detecting what the target object is when NullReferenceException is thrown
At the point where the NRE is thrown, there is no target object — that’s the point of the exception. The most you can hope for is to trap the file and line number where the exception occurred. If you’re having problems identifying which object reference is causing the problem, then you might want to … Read more
Best way to return status flag and message from a method in Java
Returning a small object with both the boolean flag and the String inside is probably the most OO-like way of doing it, although I agree that it seems overkill for a simple case like this. Another alternative is to always return a String, and have null (or an empty String – you choose which) indicate … Read more
How to design exception “types” in C++ [closed]
The C++ standard library’s exception hierarchy is IMHO pretty arbitrary and meaningless. For example, it would probably just create problems if anyone started actually using e.g. std::logic_error instead of terminating when it’s clear that the program has a Very Nasty Bug™. For as the standard puts it, “The distinguishing characteristic of logic errors is that … Read more