Most likely, you have model which contains the same property twice. Perhaps you are using new to hide the base property. Solution is to override the property or use another name. If you share your model, we would be able to elaborate more.
The exception class “Exception” is declared in the unit SysUtils. So you must add “SysUtils” to your uses-clause. uses SysUtils; procedure RaiseMyException; begin raise Exception.Create(‘Hallo World!’); end;
Don’t sweat the small stuff. You’ve already picked one of the slower scripting languages out there, so trying to optimize down to the opcode is not going to help you much. The reason to choose an interpreted, dynamic language like Python is to optimize your time, not the CPU’s. If you use common language idioms, … Read more
I would say don’t catch the exception if you really can’t handle it. And logging isn’t considered handling an error. Better to bubble it up to someone who can by throwing the exception. If you must return a value, and null is the only sensible thing, there’s nothing wrong with that. Just document it and … Read more
Sounds like you executed another statement in the same connection before traversing the result set from the first statement. If you’re nesting the processing of two result sets from the same database, you’re doing something wrong. The combination of those sets should be done on the database side.
You can certainly create a checked exception of your own (such as UnhandledEnumType), or you could catch and handle the IllegalArgumentException. It sounds a little fishy that only some values of the enum should be handled. One of the purposes of an enum is to bind values to a certain set of values, and I … Read more
We have recently had a similar problem on the machines of several customers. The problem turned out to be a bug in the MSHTML control in certain environments. A common symptom for the problem seems to be the broken registration of the jscript.dll library. Symptoms that may help to diagnose if it’s the same problem … Read more
The accepted answer is incorrect incomplete (at least for Python 3.6 and above). By catching Exception you catch most errors – basically all the errors that any module you use might throw. By catching BaseException, in addition to all the above exceptions, you also catch exceptions of the types SystemExit, KeyboardInterrupt, and GeneratorExit. By catching … Read more
I have found page no 42 in “The Swift Programming Language (Swift 2.2 Prerelease)” where it states explicitly the following: Another way to handle errors is to use try? to convert the result to an optional. If the function throws an error, the specific error is discarded and the result is nil. Otherwise, the result … Read more
You can use one code base on Pythons 2.5 through 3.2, but it isn’t easy. You can take a look at coverage.py, which runs on 2.3 through 3.3 with a single code base. The way to catch an exception and get a reference to the exception that works in all of them is this: except … Read more