うんちゃん

# 2099
- **DRY**: Don't Repeat Yourself
  - Refactor the common functionality into one method, if copies in same class
  - Inheritance for multiple classes
- **Technical Debt**
  - Things being harder to maintain in the long run
- No point of JavaDoc-ing private attributes
- **Fail-fast**
  - catch the error as soon as you can, stop everything to avoid a flawed process
- **Defensive copying**
  - return a copy of something rather than the reference to stop other classes from modifying it
- **Pre-conditions**
  - Handled using `Exceptions` or `Assertions`
- **Associations vs Dependencies**
- **Dependency Inversion**
  - You have two things that inherit from one thing
  - Make a superclass
  - Have the dependencies move to that

```
 test = "gtgtgtgt"
```