Python 3 In python 3 you can do the following: try: raise MyExceptionToBeWrapped(“I have twisted my ankle”) except MyExceptionToBeWrapped as e: raise MyWrapperException(“I’m not in a good shape”) from e This will produce something like this: Traceback (most recent call last): … MyExceptionToBeWrapped: (“I have twisted my ankle”) The above exception was the direct cause … Read more
Write-Error should be used if you want to inform the user of a non-critical error. By default all it does is print an error message in red text on the console. It does not stop a pipeline or a loop from continuing. Throw on the other hand produces what is called a terminating error. If … Read more
I’ve used both approaches, and they both worked fine for me. Whichever one I use, I always try to apply this principle: If the only possible errors are programmer errors, don’t return an error code, use asserts inside the function. An assertion that validates the inputs clearly communicates what the function expects, while too much … Read more
Basically, fs.readFileSync throws an error when a file is not found. This error is from the Error prototype and thrown using throw, hence the only way to catch is with a try / catch block: var fileContents; try { fileContents = fs.readFileSync(‘foo.bar’); } catch (err) { // Here you get the error when the file … Read more
The error message points to a problem with your Java version. Do you have a JDK installed? Try adding the following (noting the new line): /!\ make sure, that the -vm option occurs before the -vmargs command. Everything after -vmargs is passed directly to the JVM. -vm c:/wherever/java/jdk1.6.0_21/jre/bin/server/jvm.dll -vmargs… …to your eclipse.ini file, pointing to … Read more
As an addition to previous answers. Yesterday, ASP.NET Web API 2.1 was oficially released. It offers another opportunity to handle exceptions globally. The details are given in the sample. Briefly, you add global exception loggers and/or global exception handler (only one). You add them to configuration: public static void Register(HttpConfiguration config) { config.MapHttpAttributeRoutes(); // There … Read more
Swift 2 & 3 Things have changed a bit in Swift 2, as there is a new error-handling mechanism, that is somewhat more similar to exceptions but different in detail. 1. Indicating error possibility If function/method wants to indicate that it may throw an error, it should contain throws keyword like this func summonDefaultDragon() throws … Read more
Updated for Swift 5.1 Assume the following throwing function: enum ThrowableError: Error { case badError(howBad: Int) } func doSomething(everythingIsFine: Bool = false) throws -> String { if everythingIsFine { return “Everything is ok” } else { throw ThrowableError.badError(howBad: 4) } } try You have 2 options when you try calling a function that may throw. … Read more
I have come to the same problem and fixed the same way as Alex K. So if “Send Errors To Browser” is not working set also this: Error Pages -> 500 -> Edit Feature Settings -> “Detailed Errors” Also note that if the content of the error page sent back is quite short and you’re … Read more
There are a few things you should check : Did you write the name of your function correctly? Names are case sensitive. Did you install the package that contains the function? install.packages(“thePackage”) (this only needs to be done once) Did you attach that package to the workspace ? require(thePackage) (and check its return value) or … Read more