I'm trying to understand async await in the simplest form. I want to create a very simple method that adds two numbers for the sake of this example, granted, it's no processing time at all, it's just a matter of formulating an example here. ...

I'd like to be able to introspect a C++ class for its name, contents (i.e. members and their types) etc. I'm talking native C++ here, not managed C++, which has reflection. I realise C++ supplies some limited information using RTTI. Which additional libraries (or other techniques) could supply this ...

...nce between an abstract function and a virtual function? In which cases is it recommended to use virtual or abstract? Which one is the best approach? ...

...e rationale behind not returning null is that you do not have to check for it and hence your code does not need to follow a different path based on the return value. You might want to check out the Null Object Pattern which provides more information on this. For example, if I were to define a meth...

I know that PreparedStatements avoid/prevent SQL Injection. How does it do that? Will the final form query that is constructed using PreparedStatements will be a string or otherwise? ...

...h methods } But what if encryptPassword() is not database dependent, and it's the same for each class? Then the above would not be a good approach. Instead, consider this approach: public abstract class LoginAuth{ public String encryptPassword(String pass){ // Implement the same d...

...cation should not try to catch." while An Exception "indicates conditions that a reasonable application might want to catch." Error along with RuntimeException & their subclasses are unchecked exceptions. All other Exception classes are checked exceptions. Checked exceptions are g...

... It behaves as it should a % b = a - a / b * b; i.e. it's the remainder. You can do (a % b + b) % b This expression works as the result of (a % b) is necessarily lower than b, no matter if a is positive or negative. Adding...

...t subject to GC). As the off-heap store continues to be managed in memory, it is slightly slower than the on-heap store, but still faster than the disk store. The internal details involved in management and usage of the off-heap store aren't very evident in the link posted in the question, so it wo...

... Preprocessing: the preprocessor takes a C++ source code file and deals with the #includes, #defines and other preprocessor directives. The output of this step is a "pure" C++ file without pre-processor directives. Compilation: the compiler takes the pre-processor's output and produces an object f...