try-catch

问题 I have a function fun that often produces warnings and occasionally throws errors. I am trying to use tryCatch to log warnings and errors, as suggested in this answer. How can I simultaneously store the warnings and errors? Here is a minimal setup: # Function for warnings, errors. fun <- function(i) { # Print warnings as they come in. options(warn = 1) # Issue warning. warning(paste("Warn.", i)) # Stop. if(i == 3) { stop(paste("Err.", i)) } # Restore warning default behaviour. options(warn =

问题 I am implementing twilio in my laravel 5 application. To use it in the framework I use aloha/laravel-twilio integration. Sending a valid request with test-credentials works fine. I have problems when I want to implement an error-handling. For some reason the catch does not get the error, which results in a crash of the app. The error seems to be in the twilio-sdk if I read the error message correctly. Here is what I've done so far: <?php namespace App; use Illuminate\Database\Eloquent\Model;

问题 I am implementing twilio in my laravel 5 application. To use it in the framework I use aloha/laravel-twilio integration. Sending a valid request with test-credentials works fine. I have problems when I want to implement an error-handling. For some reason the catch does not get the error, which results in a crash of the app. The error seems to be in the twilio-sdk if I read the error message correctly. Here is what I've done so far: <?php namespace App; use Illuminate\Database\Eloquent\Model;

问题 import java.util.Scanner; public class Questioner { Scanner scanner = new Scanner(System.in); boolean condition; int tempInt; double tempDouble; public Questioner() { condition = true; } public String stringInput(String text) { System.out.print(text); return scanner.nextLine(); } public int intInput(String text) { do { System.out.print(text); try { tempInt = scanner.nextInt(); condition = false; } catch (java.util.InputMismatchException error) { System.out.println("Please use valid input.");

问题 This question already has an answer here : Proper way to close an AutoCloseable (1 answer) Closed 7 months ago . For example, I have method for working with input/output streams: public void doSomethingWithStreams () throws FileNotFoundException, IOException { OutputStream out1, out2; InputStream in1, in2; try{ //do something with Streams: read, write, process, etc. } finally{ //There I try to close connections out1.close(); out2.close(); in1.close(); in2.close(); } } Method can throws

问题 I need to catch an error in Rf_eval in C . Is that even possible? Some sample function SEXP foo(SEXP x, SEXP env) { SEXP res; PROTECT(res = Rf_eval(x, env)); UNPROTECT(1); return res; } I have tried Rcpp_eval from Rcpp and Rcpp11 , but both of them don't work for my case, I need to call Rf_eval directly. Is it possible to catch an error directly in C? If so how? 回答1: use R_tryEval or R_tryEvalSilent in Rinternals.h #include <Rdefines.h> SEXP foo(SEXP fun, SEXP env) { int err = 0; R_tryEval

问题 I have a stored procedure in my SQL Server 2008 database and I am devloping a java application that use a sqljdbc4 connection. Everything works fine, even procedure call, but there is one thing - in some case java does not catch raised exception throwen by the procedures and specified when there is call like a select or update (delete insert) here is an exemple AS BEGIN DECLARE @c INT SELECT @c= COUNT(nomUtilisateur) FROM Utilisateur2 PRINT @c RAISERROR(N'error message personalise',18,1) END

问题 This question already has answers here : Is it a bad practice to catch Throwable? (14 answers) Closed 5 years ago . Take an example like this: public List<CloseableThing> readThings(List<File> files) throws IOException { ImmutableList.Builder<CloseableThing> things = ImmutableList.builder(); try { for (File file : files) { things.add(readThing(file)) } return things.build(); } catch (Throwable t) { for (CloseableThing thing : things.build()) { thing.close(); } throw t; } } A code review

问题 What I am trying to do is load a data file from the local directory. If it is not there then download it from a webserver. Currently I am using a nested tryCatch and it appears to work. Is this the correct way to attempt to complete this task in R? tryCatch( { #attempt to read file from current directory # use assign so you can access the variable outside of the function assign("installations", read.csv('data.csv'), envir=.GlobalEnv) print("Loaded installation data from local storage") },

问题 I have a function with try, catch and finally block. If an exception is caught, then I catch certain parameters of that exception such as its error code, error detail message and message and print it in an excel file. Am posting relevant code below: public void UpdateGroup(String strSiteID, String strGroup, int row) { try { Console.WriteLine("UpdateGroup"); Excel1.MWMClient.MWMServiceProxy.Group group = new Excel1.MWMClient.MWMServiceProxy.Group(); group.name = "plumber"; group.description =