Principles

A principle is different from a Design Pattern in that …

Important Principles To Know

Reference article

1. SOLID : 5 Principles discussed in more detail here.

2. Separation of Concerns

3. Composition Over Inheritance

4. YAGNI : You Ain’t Gonna Need It

5. KISS : Keep It Simple Student - blah

6. DRY : Don’t Repeat Yourself - I said, Don’t repeat yourself!

7. Immutability :

Cohesion vs Coupling

We want High cohesion and low coupling:

• Cohesion: internal focus. It is the strength of responsibilities is within a module.

• Coupling: external connections. It is the strength of dependencies between modules.

What’s so Important?

• You should …