Why aren’t static methods considered good OO practice? [closed]

Object-orientation is about three things: messaging, local retention and protection and hiding of state-process, and extreme late-binding of all things. Of those three, the most important one is messaging. Static methods violate at least messaging and late-binding. The idea of messaging means that in OO, computation is performed by networks of self-contained objects which send … Read more

What is the meaning of “dot parenthesis” syntax? [duplicate]

sess.Values[“user”] is an interface{}, and what is between parenthesis is called a type assertion. It checks that the value of sess.Values[“user”] is of type bson.ObjectId. If it is, then ok will be true. Otherwise, it will be false. For instance: var i interface{} i = int(42) a, ok := i.(int) // a == 42 and … Read more

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