error-handling

问题 I am not able to clarify my self over the use of next() in python(3). I have a data : chr pos ms01e_PI ms01e_PG_al ms02g_PI ms02g_PG_al ms03g_PI ms03g_PG_al ms04h_PI ms04h_PG_al 2 15881989 4 C|C 6 A|C 7 C|C 7 C|C 2 15882091 4 A|T 6 A|T 7 T|A 7 A|A 2 15882148 4 T|T 6 T|T 7 T|T 7 T|G and I read it like: Works fine c = csv.DictReader(io.StringIO(data), dialect=csv.excel_tab) print(c) print(list(c)) Works fine c = csv.DictReader(io.StringIO(data), dialect=csv.excel_tab) print(c) keys = next(c)

问题 I'm currently working on my own exception class that inherits from std::exception , and I'm not sure if I should make my own what() or just call std::exception("message") in my class constructor. This is my current code: FilterException::FilterException(const char* message, int num) noexcept : error_message(message), error_number(num) {} const char* FilterException::what() const noexcept { return error_message.c_str(); } FilterException::~FilterException() noexcept { } int FilterException:

问题 I'm currently working on my own exception class that inherits from std::exception , and I'm not sure if I should make my own what() or just call std::exception("message") in my class constructor. This is my current code: FilterException::FilterException(const char* message, int num) noexcept : error_message(message), error_number(num) {} const char* FilterException::what() const noexcept { return error_message.c_str(); } FilterException::~FilterException() noexcept { } int FilterException:

问题 I'm trying to catch a bunch of errors related to the same origin policy when using the Fetch API but without any success: window.onerror = (message, file, line, col, error) => console.log(error) window.addEventListener('error', (error) => console.log(error)) try { fetch('https://www.bitstamp.net/api/ticker/').catch(e => { console.log('Caugth error:') console.log(e) console.log(JSON.stringify(e)) }) } catch (e) { console.log('try-catch') console.log(e) } The errors I want to catch only appear

问题 I'm trying to catch a bunch of errors related to the same origin policy when using the Fetch API but without any success: window.onerror = (message, file, line, col, error) => console.log(error) window.addEventListener('error', (error) => console.log(error)) try { fetch('https://www.bitstamp.net/api/ticker/').catch(e => { console.log('Caugth error:') console.log(e) console.log(JSON.stringify(e)) }) } catch (e) { console.log('try-catch') console.log(e) } The errors I want to catch only appear

问题 In REST API a 200 response show a successful operation. PHP by default output the error message directly in the response body without changing response code. In SPAs, the response text is not directly visible to user. So when the application does not work as expected I have check response body through FireBug to check for possible PHP exceptions (which cause invalid json response). Is there any way to send a specific HTTP code on all PHP errors? Is there any way to change the HTTP response

问题 I am running a panel regression using 'plm' function using the following code: test_reg=plm(y~x1+x2+x3+x4*x7+x5*x7+x6*x7+x8+x9+x10+x11,DATA, index = c("year","id"),model ="within") summary(test_reg) Then I get the following error: Error in names(y) <- namesy : 'names' attribute [343] must be the same length as the vector [0] However, when I switch the y variable and x10 variable and run the same 'plm' function again, I do not get such an error and it works well like: test_reg=plm(x10~x1+x2+x3

问题 I'm following an Angular error handling/logging tutorial here: https://www.code-sample.com/2017/09/angular-4-error-handling-and-logging.html My question is - how can I call the handleError method (residing in the global-error-handler.service.ts file, seen in step 3 below) from one of my services? In my ErrorLogService , I'm also instantiating a POST request (with data coming from a component) and using catchError to try and call handleError from global-error-handler.service.ts , but I'm

问题 I have tried to put a for loop in parallel to speed up some code. consider this: from multiprocessing import Pool results = [] def do_stuff(str): print str results.append(str) p = Pool(4) p.map(do_stuff, ['str1','str2','str3',...]) # many strings here ~ 2000 p.close() print results I have some debug messages showing from do_stuff to keep track of how far the program gets before dying. It seems to die at different points each time through. For example it will print 'str297' and then it will

问题 I am trying to figure out what boost system error code 2 is. Within a program they print out the boost error code. However, I am not sure how to look up this error code. Any help would be apprecaited. 回答1: Off the top of my head: ENOENT/FileNotFound See the errorcodes in http://www.boost.org/doc/libs/1_58_0/libs/system/doc/reference.html#Header-error_code Live On Coliru #include <boost/system/error_code.hpp> #include <iostream> int main() { boost::system::error_code ec; ec.assign(2, boost: