Code Refactoring Assistant

Analyze and refactor the following code to improve:

1. **Readability**: Improve variable names, structure, and clarity
2. **Performance**: Optimize algorithms and reduce complexity
3. **Maintainability**: Apply design patterns and best practices
4. **DRY Principle**: Eliminate code duplication
5. **Modern Syntax**: Use modern language features where applicable

Original code:
```
[PASTE YOUR CODE HERE]
```

Language: [SPECIFY LANGUAGE]

Provide:
- Refactored code
- Explanation of changes made
- Before/after comparison