exception

问题 I have a bluetooth connection between a Raspberry Pi 3b+ and an Arduino Mega, using the RPi built-in module, and an HC-05 module on the Arduino. Bi-directional communication works like a charm, for minutes to sometimes, hours at a time. Then, at seemingly random times, the python code hangs, blocked on the sock.recv() function. I can kill it via ctrl-c, and restart it, and it usually reconnects without a problem. I know Bluetooth is a little finicky and so while any suggestions of how to make

问题 Lets say I have the following interface: interface MathThing { fun mathFunction(x : Int) } Let's say the constraint I want to put onto this function is that x cannot be negative. How can I make sure that every time this (or any other arbitrary) condition isn't met on a object of type MathThing, a (custom) exception is thrown? 回答1: One way is to use a wrapper class for your function parameters. You can make an extension function so it's a little easier to pass values to the function. data

问题 Consider the following program: #include<stdexcept> #include<iostream> int main() { try { throw std::range_error(nullptr); } catch(const std::range_error&) { std::cout << "Caught!\n"; } } GCC and Clang with libstdc++ call std::terminate and abort the program with the message terminate called after throwing an instance of 'std::logic_error' what(): basic_string::_S_construct null not valid Clang with libc++ segfaults on construction of the exception. See godbolt. Are the compilers behaving

问题 This question already has an answer here : How to handle dispose in RxJava without InterruptedException (1 answer) Closed 5 days ago . I have a simple code below compositeDisposable.add(Observable.create<Int> { Thread.sleep(1000) } .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe({}, {Log.d("Track", it.localizedMessage)}, {})) Handler().postDelayed({compositeDisposable.clear()}, 100) It purposely use Thread.sleep(1000) , just to trigger the

问题 I am using Spring Boot and Spring Rest in our app. My query is : In our app, we are using Error Codes, along with creating Multiple Exception classes. So, When we already using Custom Error Codes, whats the point to create Multiple Exception classes again? I am thinking to have create only One Custom Exception class for the whole App(say AppException), should be enough to display Error Response for all kinds of Error scenarios using Error Codes. Okay, even for logs, we can show same Exception

问题 I've written a program that needs to deal with a function that can throw multiple exceptions. For each exception I catch I have some code that will handle it specifically. However, I also have some code I want to run no matter which exception was caught. My current solution is a handle_exception() function which is called from each except block. try: throw_multiple_exceptions() except FirstException as excep: handle_first_exception() handle_exception() except SecondException as excep: handle

问题 Instead of throwing new Exception("Some message", maybeSomeCause) , which means that all callers of my method will need to catch Exception (which can include RuntimeExceptions), I'd like to throw a more specific type of exception when a problem occurs. I can create my own exception types which extend Exception or another exception type, but I am curious if it is a good idea to re-use some exceptions that come with core Java language, such as: IllegalArgumentException

问题 I do a simple throw "TEST THROW" and it isn't caught in my catch (std::exception& e) . Is it because I'm catching an std::exception& e ? I mean, are only exception classes derived from std::exception caught? If not, am I doing something wrong or is it normal? By the way, none of the two catch blocks caught the throw exception. int main() { try { throw "TEST THROW"; // TEST Core core; core.Init(); core.Load(); while (!core.requestCloseWindow) { core.HandleInput(); core.Update(); core.Draw(); }

问题 I do a simple throw "TEST THROW" and it isn't caught in my catch (std::exception& e) . Is it because I'm catching an std::exception& e ? I mean, are only exception classes derived from std::exception caught? If not, am I doing something wrong or is it normal? By the way, none of the two catch blocks caught the throw exception. int main() { try { throw "TEST THROW"; // TEST Core core; core.Init(); core.Load(); while (!core.requestCloseWindow) { core.HandleInput(); core.Update(); core.Draw(); }

问题 I do a simple throw "TEST THROW" and it isn't caught in my catch (std::exception& e) . Is it because I'm catching an std::exception& e ? I mean, are only exception classes derived from std::exception caught? If not, am I doing something wrong or is it normal? By the way, none of the two catch blocks caught the throw exception. int main() { try { throw "TEST THROW"; // TEST Core core; core.Init(); core.Load(); while (!core.requestCloseWindow) { core.HandleInput(); core.Update(); core.Draw(); }