Design Code

这个章节的目的是教会你如何设计代码逻辑，如何思考，如何实现。

面向对象

Methods

Structs and Traits

impl for struct、struct / function can be generic

Generic Types 泛型 & Trait & Lifetime

Trait

impl Trait for Struct， default impl

Trait Object

Assoacited Trait

Think in expression ｜ Iterators ｜ Option ｜ Rich Types

Zero Cost Abstraction(CPU 概念的举例，只存在我们脑海，本质是 01) - OPtion and Result 随处可见、零成本抽象、迭代

Polymorphism

• No Classical Inheritance

• Traits

• Generics

• Design Code

  • Build Structure, Convert Business Knowledge to Type System/Enum
    • No Classes
    • ALGEBRAIC TYPE SYSTEM
    • data normalization
    • state machines

• Write Code / Read Code / Test Code

  • Work with compiler.

• Maintenance Code / Support their Code

  • Trust code, 少维护