...if(dog == null || dog.firstName == null) return; The above is the proper order to check for nulls, we start with the base object, dog in this case, and then begin walking down the tree of possibilities to make sure everything is valid before processing. If the order were reversed a NPE could pote...

...ow how to call my code. This is achieved using events/delegates, callbacks etc. Here the Control of flow is "Inverted". So, instead of depending the flow of control on statically bound objects, the flow depends upon the overall object graph and the relations between different objects. Dependency I...

...ecially handy for adding standard code like logging, performance tracking, etc. to methods without clogging up the method code with this standard code. share | improve this answer | ...

...lly by changing the underlying WebDriver implementation to Chrome, Firefox etc. share | improve this answer | follow | ...

...nmanaged recources in the dispose method like database connection, files etc. The class implementing dispose method should implement IDisposable interface.A Dispose method should call the GC.SuppressFinalize method for the object it is disposing if the class has desturctor because it has alr...

.... Spring ports easily between app servers (e.g., WebLogic, Tomcat, JBOSS, etc.) because it doesn't depend on them. However, you are locked into Spring. Spring encourages good OO design practices (e.g., interfaces, layers, separation of concerns) that benefit any problem they touch, even if you de...

...32, MD5 and SHA. https://code.google.com/p/xxhash/ Note that this is the ordering on a 32-bit compilation. On a 64-bit compilation the performance order is likely very different. Some of the hashes are heavily based on 64-bit multiplications and fetches. ...

...not concern about that now. That's meant by the term static initialization order fiasco. Dynamic storage duration The last storage duration is dynamic. You use it if you want to have objects live on another isle, and you want to put pointers around that reference them. You also use them if your...

...old on the referred object (a.k.a. they don't increase the retain count in order to prevent ARC from deallocating the referred object). But why two keywords? This distinction has to do with the fact that Optional types are built-in the Swift language. Long story short about them: optional types offe...

... Why rethrow etc? This works and it will make the service return status 500 etc public class LogExceptionFilter : ExceptionFilterAttribute { private static readonly ILog log = LogManager.GetLogger(typeof (LogExceptionFilter)); p...