The Microsft SQL Server-specific error code for a deadlock is 1205 so you’d need to handle the SqlException and check for that. So, e.g. if for all other types of SqlException you want the bubble the exception up: catch (SqlException ex) { if (ex.Number == 1205) { // Deadlock } else throw; } Or, using … Read more
These are two different things: The catch block is only executed if an exception is thrown in the try block. The finally block is executed always after the try(-catch) block, if an exception is thrown or not. In your example you haven’t shown the third possible construct: try { // try to execute this statements… … Read more
On Linux we can have these as exceptions, too. Normally, when your program performs a segmentation fault, it is sent a SIGSEGV signal. You can set up your own handler for this signal and mitigate the consequences. Of course you should really be sure that you can recover from the situation. In your case, I … Read more
As far as possible, don’t use exceptions for control flow or unexceptional circumstances. But to answer your question directly (assuming all the exception-types are the same): Func<double>[] calcs = { calc1, calc2, calc3 }; foreach(var calc in calcs) { try { return calc(); } catch (CalcException){ } } throw new NoCalcsWorkedException();
Yes, you can install an interrupt handler using the module signal, and wait forever using a threading.Event: import signal import sys import time import threading def signal_handler(signal, frame): print(‘You pressed Ctrl+C!’) sys.exit(0) signal.signal(signal.SIGINT, signal_handler) print(‘Press Ctrl+C’) forever = threading.Event() forever.wait()
The two code blocks you gave are not equivalent The code you described as old way of doing things has a serious bug: in case opening the file fails you will get a second exception in the finally clause because f is not bound. The equivalent old style code would be: try: f = open(“file”, … Read more
Java 7 and later Multiple-exception catches are supported, starting in Java 7. The syntax is: try { // stuff } catch (Exception1 | Exception2 ex) { // Handle both exceptions } The static type of ex is the most specialized common supertype of the exceptions listed. There is a nice feature where if you rethrow … Read more
There are a number of scenarios where you may wish to catch an OutOfMemoryError and in my experience (on Windows and Solaris JVMs), only very infrequently is OutOfMemoryError the death-knell to a JVM. There is only one good reason to catch an OutOfMemoryError and that is to close down gracefully, cleanly releasing resources and logging … Read more
You’ll have to make this separate try blocks: try: code a except ExplicitException: pass try: code b except ExplicitException: try: code c except ExplicitException: try: code d except ExplicitException: pass This assumes you want to run code c only if code b failed. If you need to run code c regardless, you need to put … Read more
It seems to be best practice not to place multiple lines of business logic in the try body Actually I’d say it is. You usually want to catch all exceptions from working with the value: try { const createdUser = await this.User.create(userInfo); console.log(createdUser) // business logic goes here } catch (error) { console.error(error) // from … Read more