Date: May 1, 2023

Topic: OOD

Menu design

Notes

• 通过OOD的方式，把现实世界映射到计算机模型，让计算机解决用户的需求

Difference between Algorithms vs. OOD vs. System Design

• Algorithm: 针对一个特定的问题设计和实现一个solution
• OOD: design a solution to solve a large problem or a combination of problems with multiple classes/ objects (data + operations)
• System Design: Design a solution to solve even larger problems with multiple services and systems

Key concepts of OOD

• use cases → working design → good design → better design
• 客户需求第一
• 提供最基本的可行解
• 灵活运用OO原则进行优化
  • Easy to use/read/maintain
    • clear，elegant，easy to understand， no ambiguity
    • prevent users from making mistakes
• 继续优化-可维护性、可重用性、可拓展性

在可行基础上可以考虑的优化：

• Structured programming
• 如果只想暴露有限的接口？(Interface, API)