彭博社的苹果专家马克 · 古尔曼透露：
return right - left + 1;
，这一点在雷电模拟器官方版本下载中也有详细论述
This is one of the few modern books that address the topic of Modularity. While it also presents some patterns I found less practical (e.g. SOLID), I highly recommend reading it.
▲ 图片来自微博 @数码闲聊站