Try / Catch in the loop in C #

There is a try/catch/finally block within the for or foreach loop. What will happen if there is a break statement within the try block? Will finally block be executed?Yes, finally blocks hit even if you have a jump statement such as break. Typically,

FileNotFoundException is not caught or thrown

It's happening with 2 different methods, it both cases the EDT (swing components) blocks and can't do anything. In the first I'm trying with throws , it sends strings to a printer, so the FileNotFoundException is because the printer is not being foun

How to display the location of the error in tryCatch?

Displaying error locations with options(show.error.locations = TRUE) doesn't seem to work when handling exceptions with tryCatch. I am trying to display location of the error but I don't know how: options(show.error.locations = TRUE) tryCatch({ some_

Use tryCatch and rvest to handle 404 and other crawl errors

When retrieving the h1 title using rvest, I sometimes run into 404 pages. This stop the process and returns this error. Error in open.connection(x, "rb") : HTTP error 404. See the example below Data<-data.frame(Pages=c( "http://boingboin

if-statement and try-catch do not prevent the error

this part of my code should do the following: Check if input is a int-type (try-catch) if input is a int, check if it is in between the list: Code public static void selection(List<Performer> listperformer) { int i=0; List<Performer> idlist =

While - try - catch in Java

I need a java program that ask a number between 0 and 2. If the user write 0, the program ends. If the user write 1, it executes one function. If the user write 2, it executes another function. I also want to handle the error "java.lang.NumberFormatE

While loop that does not work with Try / Catch instructions

Im trying to give the user the opportunity to repeat an input after introducing something that has produced an error but something is not working because once the err is caught the try stuff is not executed again, instead it goes directly to the catc

Convert a list [Try [A]] to List [A] in Scala

I want to filter out bad input from input data. I'm currently using scala.util.Try to wrap any exceptions. Following is a simple example where 3I throws a NumberFormatException. I was wondering if there is a better way of doing this in Scala ? val da

Confused about trying / except with custom exception

My code: class AError(Exception): print 'error occur' for i in range(3): try: print '---oo' raise AError except AError: print 'get AError' else: print 'going on' finally: print 'finally' When I run the above code, the output is this: error occur ---o

Variable after the last associated manager

The following 3.3.3/2 quote: If the function has a function-try-block the potential scope of a parameter or of a function-local predefined variable ends at the end of the last associated handler, otherwise it ends at the end of the outermost block of

How to manage the try-catch block in unit tests?

I want to write unit test for try catch block(C#). Public ActionResult Index() { try { ------------- } catch(Exception ex) { throw; } } As you can see that i am using try-catch block in my index method in controller.And while unit testing this method

try-catch-finally with return after

I know how try, catch & finally work (for most part), but I have one thing I was wondering: what happens with a return statement after a try-catch-finally, while we already had a return in the try (or catch)? For example: public boolean someMethod(){

Try and Catch using the syntax error Integer.parseInt () [Java]

I am trying to make a simple method which test to see if a provide String contains only numbers, to do this I am trying to use try and catch (just learnt it and I would like to practise putting it to use) where I try to parseInt() the given String an

What are the best practices for handling exceptions in C #?

I have following code in my web page: btnTest_Click(object sender, EventArgs e) { ... bool ret=myFunc(...); if (ret) {...} else { lblStatus.Text="Some Text"; lblStatus.Visible=true; } } private bool myFunc(...) { bool ret=false; try { ... ret=tr

If an error occurs, the program displays unexpected behavior

This question already has an answer here: Why do System.err statements get printed first sometimes? 2 answers I was just trying something with try-catch and this code: public class MainThread { public static void main(String [] args) { try { badMetho

Try / catch in the builder - Recommended practice?

Something I've always been curious of public class FileDataValidator { private String[] lineData; public FileDataValidator(String[] lineData){ this.lineData = lineData; removeLeadingAndTrailingQuotes(); try { validateName(); validateAge(); validateTo

How to handle thows / exceptions in a container class safely?

I am currently working on a container class that uses allocators to manage the resources.I'll try to give a short version of what I currently do to resize the container. (The real one is not one-dimensional but the scheme is identical since the alloc

URL as a field in the Java object

I have an object which contains a field of type String, with a value similar to "http://stackoverflow.com" I have a method which must take a URL. So I am wrapping that in a method which takes the String, and then constructs a URL from the String

How to try and save working in python when managing files?

I am curious how this Try and Except work in python after running into this error: def for_file(data): open_file = file('data.txt', 'w') try: open_file.write(data) except: print 'This is an error!' open_file.close() Output: This is an error! def for_

Continue reading the XML after the nonexistence of an attribute

I have this code for reading XML files: try { File fXmlFile = new File(fullFilePath); DocumentBuilderFactory dbFactory = DocumentBuilderFactory .newInstance(); DocumentBuilder dBuilder = dbFactory.newDocumentBuilder(); Document doc = dBuilder.parse(f

What will the next tcl code do?

I have the following line: if {[catch {exec fgrep E- $log_file} errors]} { set errors "" } What does this do? Does the catch command puts all the lines found by fgrep in the log file into errors? Will it put there only errors thrown by fgrep, fo

try to catch the finale is not catching the exception

While on return to my app from getting phone number from address book, if by mistake i fetch some address or any thing except for phone number, the code in the try catch final gives the following but doesn't catch it, any idea is appreciated in advan

C # Catch exception bool when using return

I'm using the code below and occasionally boolUpdate is not TRUE or FALSE and I get an exception, I can't surround this with a TRY CATCH block as it is using 'return', how can I catch this correctly? if (!Boolean.Parse(boolUpdate)) return true; How a

Learning Try-Catch

I'm a Java beginner so please bear with me static int load = 100; static int greet; public void loadDeduct(int cLoad, int c){ int balance; balance = cLoad - 7; System.out.println("Your balance: " + balance); } public void loadDeduct(int tLoad){

Try-catch each line of code without individual test blocks

I do not currently have this issue, but you never know, and thought experiments are always fun. Ignoring the obvious problems that you would have to have with your architecture to even be attempting this, let's assume that you had some horribly-writt