To You

When I think of you, I’m reminded of the beautiful plains of Iowa.The distance between us is breaking my spirit. My time and experiences without you are meaningless to me. Falling in love with you was the easiest thing I have ever done. Nothing matters to me but you.And everyday I am alive, I’m aware of this. I loved you the day I met you, I love you today, and I will love you to rest of my life.

设计模式

设计模式于程序员而言相当重要，它是我们写出优秀程序的保障。设计模式与程序员的架构能力与阅读源码的能力息息相关，所以面试中也经常被问到，非常值得深入学习

面向对象的特点是可维护、可复用、可扩展、灵活性好，它真正强大的地方在于：随着业务变得越来越复杂，面向对象依然能够使得程序结构良好，而面向过程却会导致程序越来越臃肿

设计模式有六大原则

开闭原则：对修改封闭，对拓展开放

单一职责原则

里式替换原则

依赖倒置原则

迪米特原则（最少知道原则）

接口隔离原则

构建型模型

工厂模式

https://www.zhihu.com/question/308850392/answer/1324509357