Nope. A Python lambda can only be a single expression. Use a named function. It is convenient to write a generic function for converting types: def tryconvert(value, default, *types): for t in types: try: return t(value) except (ValueError, TypeError): continue return default Then you can write your lambda: lambda v: tryconvert(v, 0, int) You could … Read more
The type of the expression b ? new Excep1() : new Excep2() is Exception, since that’s the common supertype of Excep1 and Excep2. However, you are not catching Exception, so the compiler complains about it. If you catch Exception, it will pass compilation: public int m2(boolean b) { try { throw b ? new Excep1() … Read more
As a supplementary answer to CertainPerformance’s one: Up until TypeScript 4.0, the catch clause bindings were set to any thus allowing easy access to the message property. This is unsafe because it is not guaranteed that what’s thrown will be inheriting from the Error prototype – it just happens that we don’t throw anything but … Read more
Use this as an example: begin # “try” block puts ‘I am before the raise.’ raise ‘An error has occurred.’ # optionally: `raise Exception, “message”` puts ‘I am after the raise.’ # won’t be executed rescue # optionally: `rescue StandardError => ex` puts ‘I am rescued.’ ensure # will always get executed puts ‘Always gets … Read more
There are lots of good answers here, but I didn’t see any that address the question of whether you can accomplish this via decorators. The short answer is “no,” at least not without structural changes to your code. Decorators operate at the function level, not on individual statements. Therefore, in order to use decorators, you … Read more
A blank raise raises the last exception. # need to re-raise err so caller can do its own handling if err: raise If you use raise something Python has no way of knowing if something was an exception just caught before, or a new exception with a new stack trace. That’s why there is the … Read more
How about trying as PHP documentation (well… at least one of its readers) say: <?php function shutdown() { $a = error_get_last(); if ($a == null) {echo “No errors”;} else {print_r($a);} } register_shutdown_function(‘shutdown’); ini_set(‘max_execution_time’, 1); sleep(3); ?> Have a look at the following links: http://www.php.net/manual/en/function.set-error-handler.php#106061 http://www.php.net/manual/en/function.register-shutdown-function.php
Dart is an optional typed language. So the type of e is not required. you have to use the following syntax to catch only SomeException : try { // … } on SomeException catch(e) { //Handle exception of type SomeException } catch(e) { //Handle all other exceptions } See catch section of Dart: Up and … Read more
As of .NET 2, if you don’t tweak the configuration? Nothing. Before then, or with some config tweak I can’t remember precisely, there was the possibility of an exception being thrown from unmanaged code which didn’t get converted into an Exception-compatible object. Note that there’s another option in between, where you specify the type but … Read more
You need to define your custom error handler like: <?php set_error_handler(‘exceptions_error_handler’); function exceptions_error_handler($severity, $message, $filename, $lineno) { if (error_reporting() == 0) { return; } if (error_reporting() & $severity) { throw new ErrorException($message, 0, $severity, $filename, $lineno); } } $a[1] = ‘jfksjfks’; try { $b = $a[0]; } catch (Exception $e) { echo “jsdlkjflsjfkjl”; }