[Update. I need to be more precise, I see...] See the following example in javascript: <html> <head> <script> window.onerror = function() { alert('error'); // this one works try {i.dont.exist += 0;} catch(e) { // do some stacktrace stuff, this does not trigger alert(e.stack); ...
When using the EXECUTE statement combined with the RETURNING clause, UniData returns any error codes encountered along with related data. Does anyone know a definitive list of these error codes? Unfortunately the manuals are lacking in this regard and I'm not feeling particularly psychic this morning. For example EXECUTE MyStatement R...
I would like to create an object of a VB6 class and call a method on that object. If an error occurs in that method I would like to be able to raise an error in the method and catch it outside the class, in the routine which I called the method. The class for example may contain: Const cmlngMYERROR As Long = vbObjectError + 1001 ...
Does Reed-Solomon error correction work in an instance where there is a dropped byte (or multiple dropped bytes)? For example, let's say it's a (12,8) Reed Solomon code, so theoretically it should be able to correct 2 errors (or 4 erasures if the position is known). But, what happens if only 11 (or 10) bytes are received and one doesn'...
I have an application that ideally would allow 25% of errors to be corrected with an original message that would be 12 to 16 bytes (8-bit bytes) long. The constraints are the message cannot be retransmitted and if parts of message aren't received it will be unknown which bytes did not show up. For example, let's say, I'm using somethin...
Could someone provide info about error-handling in wxWidgets or a pointer to documentation? Specifically, I discovered this behavior: I try to create a wxImage from a file. This is in an event-handler. The file is not present. The call to the image constructor does not throw an exception. (I understand that no wxWidgets code throws...
I'm having a problem with TRY...CATCH blocks. Can someone explain why the following code will not execute my sp? DECLARE @Result int SET @Result = 0 BEGIN TRY SELECT * FROM TableNoExist END TRY BEGIN CATCH SET @Result = ERROR_NUMBER() END CATCH EXEC dbo.spSecurityEventAdd @pSecurityEventTypeID = 11, @pResult = @Result But this...
I created a webpage and a XML REST service. 0. I would like to know how errors are handled in Rails (general). 1. Let say that a controller does not exists and I would like to redirect a user to a default "Page not found" address (website) or show a default error status code (REST). 2. What is a best practice for handling controlle...
I'm building a basic error logging feature in my application, where I just record a custom message like "product ID was missing" and record it in the DB. Is there any way I can dynamically capture from which class or function the error was triggered (ie the function from where log_error() was called), or the line number? ...
How do i get all of the lines of "$dblink is down" into one $l_msg string? Ideally I would like to get the error returned by oracle on failure and I cannot see a way to solve this. my $dblinks = $l_dbh->selectcol_arrayref("select dbname from db_link"); for my $dblink (@$dblinks) { my $l_results = eval { my ($l_erg) = $l_dbh->s...
I am extremely new to WPF and I'm using XBAP to create a drag and drop application for a company Intranet. I have pretty much everything working, but I am getting an exception (I presume) but the exception isn't displaying. I'm in a debug environment but it doesn't seem to be making a difference. How can I see the exception which is b...
For example, if we try to get to some api but fail, or try to connect to our database but also fail. ...
When failed to access something on the web (api, database), how would I stop executing the rest of the script and log the error in the log file? Well, and so that the visitor wouldn't see the exact cause but rather they would see my custom message (say, 'A bad thing just happened'). What steps do I need to take to arrange things? ...
I've got a pretty simple page which fetches a url and parse some data. I have built into my page some error handling in the event that the response is a 404 error. However, I can't seem to stop php from spitting out the following errors Warning: file_get_contents(http://url-to-retrieve.com/123.html) [function.file-get-contents]: f...
I am creating a method that collects accumulated totals throughout the month. The problem is that there may not be charges for some of the items in a given month so no rows would be returned. I can see how this would error with no data: double fuelCost = (double)(from a in db.EquipmentFuelLogs where a.wdEqui...
I have an asp.net site....I would like to know how to handle this error gracefully when a user enters and submit an illegal character (xss attack). "A potentially dangerous Request.Form value was detected from the client (ctl00$TextBox1="").........etc" I can turn-off the requestvalidation attribute and write a code to filter the strin...
I'm developing a REST-ful web service using RESTEasy deployed on Tomcat. I've configured an error page which takes the exception's message and generates an XML based on it when any exception occurs during the request. This works fine for any application generated exceptions. However, if client sends an invalid XML which cannot be unma...
I'm working on the back-end of my website and I'm wondering how far I should be going to test for errors and throwing exceptions accordingly? Testing in the sense of improper usage of methods and functions. Not errors under correct usage. My biggest concern is code bloat and uglying it up with a bunch of if/elses, type checks, and other...
We are developing a proxy in WCF that will serve as a means of communication for some handhelds running our custom client application. I am curious what error handling strategies people use as I would rather not wrap EVERY proxy call in try/catch. When I develop ASP .NET I dont catch the majority of exceptions, I leverage Application_E...
Given: fruitid('Apple', 'Granny Smith', 1). fruitid('Apple', 'Cox', 2). fruitid('Pear', 'Bartlett', 3). How would I go about finding only unique items for instance: is_unique(FruitName):- In the example clauses the answer would be Pear. I'm also trying to add error handling to my code, so in this instance if an input is: is_uniqu...