object-orientation offers a more effective way to let asystem make good use of parallelism, with each objectrepresenting its own behavior in the form of a privateprocess

This can become messy when you have a lot of configurations in your Entity. Another issue is that your annotations are coupled to your source code. Your database implementations details, or any other configurations are coupled to your domain object. This goes against the guidelines of clean code. Your domain object (Entity) should only have one reason to change.

a mutator method is a method used to control changes to a variable. They are also widely known as setter methods

class MyClassDef {

    public void setProperty(String propertyVal) { .. }

}

Python supports the object-oriented programming paradigm

Reusing an object with a reset function is much faster than declaring a new object with new

A class can only "implement" an interface. A class only "extends" a class. Likewise, an interface can extend another interface. A class can only extend one other class. A class can implement several interfaces.

Imperative programming: telling the "machine" how to do something, and as a result what you want to happen will happen. Declarative programming: telling the "machine"1 what you would like to happen, and let the computer figure out how to do it.

the function we pass to map is pure; it doesn't have any side effects (change any external state)

How it’s implemented doesn’t matter at all unless it’s implemented poorly.

what we’re doing here is to yank government—upgrade it, patch it, and ultimately transform it so that it is responsive and can interface with this new private sector in a much more effective way.

the cost of carry