exception-handling

问题 I am very new to object oriented PHP and trying some basic examples to get good hand on oop php. I have simple exmaple above in which i am trying to learn exception handling and generate an exception error message when age is greater than 20 but not working. <?php interface read_methods { public function read_age($age); } abstract class person { var $gender; var $animal; var $birds; abstract function group($group); function people($value) { $this->gender=$value; } function animals($value) {

问题 I noticed that exceptions that are handled do not result in a call to sys.excepthook ... which makes sense in retrospect. But, how do I log or otherwise customize the way that handled exceptions are dealt with? When this code executes... try: 1/0 except: pass I would like to be able to log the fact that a ZeroDivisionError was handled. Is there a way to do this? 回答1: You can get the Exception and print info about it or log that with a logging call of your own: try: 1/0 except Exception, e:

问题 Trying to parse a malformed XML content with xml.etree.ElementTree.parse() raises different exception in Python 2.6.6 and Python 2.7.5 Python 2.6: xml.parsers.expat.ExpatError Python 2.7: xml.etree.ElementTree.ParseError I'm writing code which must run in Python 2.6 and 2.7. afaik there is no way to define code which runs only in a Python version in Python (analogous to what we could do with #ifdef in C/C++). The only way I see to handle both exceptions is to catch a common parent exception

问题 I've been doing this homework assignment and I feel like I've tried anything that I could do, but this is just so frustrating. Basically this program is supposed to simulate the admin console of someone who monitors computers labs. There are 3 options at the main menu, and I've got all of them to work except for the "logoff" function. The big issue with this program is that the labs are supposed to be arrays and the ID Numbers that are located at a particular computer station are supposed to

问题 Using Fluent Security, I have configured website access using DenyAnonymousAccess, DenyAuthenticationAccess and RequireRole. SecurityConfigurator.Configure(configuration => { configuration.ResolveServicesUsing(new FluentSecurityServiceLocator()); configuration.GetAuthenticationStatusFrom(CurrentUser.IsAuthenticated); configuration.GetRolesFrom(CurrentUser.Roles); configuration.For<HomeController>().DenyAnonymousAccess(); configuration.For<ReportsController>().RequireRole(UserRole

问题 I am looking for a way to handle custom exception thrown during binding of request parameter to DTO field. I have a cantroller in Spring Boot application as follows @GetMapping("/some/url") public OutputDTO filterEntities(InputDTO inputDTO) { return service.getOutput(inputDTO); } input DTO has few fields, one of which is of enum type public class InputDTO { private EnumClass enumField; private String otherField; /** * more fields */ } user will hit the URL in ths way localhost:8081/some/url

问题 I am looking for a way to handle custom exception thrown during binding of request parameter to DTO field. I have a cantroller in Spring Boot application as follows @GetMapping("/some/url") public OutputDTO filterEntities(InputDTO inputDTO) { return service.getOutput(inputDTO); } input DTO has few fields, one of which is of enum type public class InputDTO { private EnumClass enumField; private String otherField; /** * more fields */ } user will hit the URL in ths way localhost:8081/some/url

问题 I know how to handle exceptions thrown by async tasks called by ReactiveCommand<T> but how do I handle an exception that is thrown before the task is returned? In the following example ThrowAndHandle command will throw an exception from the async task when executed and the exception will be handled. The command ThrowButFailToHandle demonstrates that I can not use ThrownExceptions to handle an exception that does not occurr "in" the task but rather before the task is created. How can such an

问题 I know how to handle exceptions thrown by async tasks called by ReactiveCommand<T> but how do I handle an exception that is thrown before the task is returned? In the following example ThrowAndHandle command will throw an exception from the async task when executed and the exception will be handled. The command ThrowButFailToHandle demonstrates that I can not use ThrownExceptions to handle an exception that does not occurr "in" the task but rather before the task is created. How can such an

问题 This is a basic string reverse program and I want to do some level of exception handling in it. But during compilation it gives me an error "NOt all code paths return value. I am not able to find out why public static string Reverse(string s) { try { if (string.IsNullOrEmpty(s)) { throw new NullReferenceException(); } char[] c = s.ToCharArray(); int start = 0; int end = c.Length - 1; char temp; while (start < end) { temp = c[start]; c[start] = c[end]; c[end] = temp; start++; end--; } return