try-catch

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."); } } while (condition == true); return tempInt; } public double doubleInput(String text) { System.out

I have a list of multiple xml files which have the same structure. Some of them have structural errors in them so they can't be read, i'm not capable of controlling them manually because there are too many files. I know that i need to imply the try or trycatch functions, i tried to understand them but i'm not understanding how to use them proberly on my case. To make the example easy i just want to transform them all into a csv. library(XML) k <- 1 Initial.files<- list.files("/My/Initial/Folder") for(i in initial.files){ data<-dataTable(xmlToDataFrame(xmlParse(i))) write.csv(data, file = paste

I've got a complicated, long function that I'm using to do simulations. It can generate errors, mostly having to do with random vectors ending up with equal values with zero-variance, getting fed either into PCA's or logistic regressions. I'm executing it on a cluster using doMC and plyr . I don't want to tryCatch every little thing inside of the function, because the possibilities for errors are many and the probabilities of each of them are small. How do I tryCatch each run, rather than tryCatch ing every little line?? The code is something like this: iteration = function(){ a really long

I have quite a complex express route in my node.js server, that makes many modifications to the database via mongoose . My goal is to implement a mechanism, that reverts all changes when any error occurs. My idea was implementing functions for undoing into the catch block. But this is quite ugly, as I have to know what the previous values were and what if an error occurs in the catch block? It's especially difficult to revert those changes, when an error occurred during a Promise.all(array.map( /* ... */ )) My route looks akin to this: module.exports = (req, res) => { var arr1, var2, var3 try

I'm using Qt.createQmlObject() to create a QML object from a file. In the case the file is corrupted, QML outputs a message that looks like this: Qt.createQmlObject(): failed to create object: qrc:/graphics/inline:5:2: Expected token }'` I'd like to catch the message in order to tell the user that his file is corrupted. I am trying to use the third argument provided in the Qt.createQmlObject() but I don't understand how it works. The wiki describes the function quite well but doesn't give any example exploiting it: https://wiki.qt.io/QML_Dynamic_Objects#Creation_of_Dynamic_QML_Objects The