Fundamental Tenets of Design Patterns Thinking

There are four basic principles of deep design thinking. These are all paraphrased to make them easier to digest in 2018.

• Start with contracts and drive implementations to serve needs.
• Encapsulate variation so you need only attend to it in the fewest places possible.
• Couple to the highest abstractions possible.
• Delegate between objects rather than inheriting between classes.

These principles underlie all the design patterns wherever they apply.

One could write a book on these four principles. In fact, a lot of people have.

I'm going to dig into each of these more deeply in subsequent posts.