Consider the following statements: int? v1 = null; int? v2 = 5 * v1; What is the value of v2? (null or empty string?) How can I prevent the compiler to mark it as invalid operation? Do I need to follow custom exception handling? ...
Is there a way to "lift" a class instance in Haskell easily? I've been frequently needing to create, e.g., Num instances for some classes that are just "lifting" the Num structure through the type constructor like this: data SomeType a = SomeCons a instance (Num a)=>Num SomeCons a where (SomeCons x) + (SomeCons y) = SomeCons (x+y)...
Hi, I was looking at this article and am struggling to follow the VB.NET example that explains lifted operators. There doesn't seem to be an equivalent C# example or tutorial. I don't have much experience with operator overloading in general, so trying to come to terms with the VB.NET equivalent whilst reading up on nullable types proba...