try-catch

问题 Consider the following code. class C {} /** * @throws \InvalidArgumentException */ function classCreateInstance($class) { if (!is_string($class)) { throw new \InvalidArgumentException("Class name must be a string."); } if (!class_exists($class)) { throw new \InvalidArgumentException("Class '$class' does not exist."); } return new $class(); } /** * @return C */ function foo() { return classCreateInstance(C::class); } There is one function that may throw an exception, because it does not know

问题 Trying to get the try/except statement working but having problems. This code will take a txt file and copy the file that is in location row 0 to location of row 1. It works however if i change one of the paths to invalid one it generates an error ftplib.error_perm however the except command is not picking up and everything stops. What am i doing wrong? Python 2.4 import csv import operator import sys import os import shutil import logging import ftplib import tldftp def docopy(filename): ftp

问题 So, in Java, the first line of your constructor HAS to be a call to super... be it implicitly calling super(), or explicitly calling another constructor. What I want to know is, why can't I put a try block around that? My specific case is that I have a mock class for a test. There is no default constructor, but I want one to make the tests simpler to read. I also want to wrap the exceptions thrown from the constructor into a RuntimeException. So, what I want to do is effectively this: public

问题 i have a try catch block in my sp with just a insert statement in the try. the catch check error code if it is pk violation, if it is then do update. but some times i get "The current transaction cannot be committed and cannot support operations that write to the log file. Roll back the transaction. Uncommittable transaction is detected at the end of the batch. The transaction is rolled back." so i added xact_abort on, but then i keep getting "Transaction count after EXECUTE indicates a

问题 I have a python function that runs other functions. def main(): func1(a,b) func2(*args,*kwargs) func3() Now I want to apply exceptions on main function. If there was an exception in any of the functions inside main, the function should not stop but continue executing next line. In other words, I want the below functionality def main(): try: func1() except: pass try: func2() except: pass try: func3() except: pass So is there any way to loop through each statement inside main function and apply

问题 I have a python function that runs other functions. def main(): func1(a,b) func2(*args,*kwargs) func3() Now I want to apply exceptions on main function. If there was an exception in any of the functions inside main, the function should not stop but continue executing next line. In other words, I want the below functionality def main(): try: func1() except: pass try: func2() except: pass try: func3() except: pass So is there any way to loop through each statement inside main function and apply

问题 I am trying to use await-async without try-catch for this: const getUsers = async (reject, time) => ( new Promise((resolve, reject) => { setTimeout(() => { if (reject) { reject(....) } resolve(.....); }, time); }) ); module.exports = { getUsers , }; With try-catch block it looks like this: const { getUsers } = require('./users'); const users = async () => { try { const value = await getUsers(1000, false); ..... } catch (error) { ..... } } users(); How can I write the same code without using

问题 If an exception should be ignored inside a method call, one would write eg the following: public void addEntryIfPresent(String key, Dto dto) { try { Map<String, Object> row = database.queryForMap(key); dto.entry.put(row); } catch (EmptyResultDataAccessException e) {} } I'm trying to write eg a custom spring annotation that has the same effect, but could just be applied to the method header. That could look similar to the following: @IgnoreException(EmptyResultDataAccessException.class) //this

问题 If an exception should be ignored inside a method call, one would write eg the following: public void addEntryIfPresent(String key, Dto dto) { try { Map<String, Object> row = database.queryForMap(key); dto.entry.put(row); } catch (EmptyResultDataAccessException e) {} } I'm trying to write eg a custom spring annotation that has the same effect, but could just be applied to the method header. That could look similar to the following: @IgnoreException(EmptyResultDataAccessException.class) //this

问题 If an exception should be ignored inside a method call, one would write eg the following: public void addEntryIfPresent(String key, Dto dto) { try { Map<String, Object> row = database.queryForMap(key); dto.entry.put(row); } catch (EmptyResultDataAccessException e) {} } I'm trying to write eg a custom spring annotation that has the same effect, but could just be applied to the method header. That could look similar to the following: @IgnoreException(EmptyResultDataAccessException.class) //this