In Domain-Driven Design we turn to the specification pattern when we want to check whether an object matches some criteria. I think specification is the oft-forgotten bastard child pattern of the domain model pattern language. I know I frequently turn to queries -- sometimes query objects -- when I want...

After talking with Greg Young for a little this morning, I realized I missed a few points that I think need to be covered as well when it comes to side effecting functions are code smells. In the previous post , I talked about side effect free functions and Design by Contract (DbC) features in regards...

I know the title might catch a few people off guard, but let me explain. Side effecting functions, for the most part, are code smells. This is a very important concept in Domain Driven Design (DDD) that's often overlooked. For those who are deep in DDD, this should sound rather familiar. And in the...