Ruby教程

猿家出品：
云集Ruby基础知识，可用于日常学习；
会记录已学习过的章节并有所区别；
若上次学到某个章节，直接关闭app，下次开启时会提醒是否继续阅读。 Ape House Publisher:
Ruby gathered basic knowledge that can be used daily learning;
We will record already studied chapters and differentiated;
If the last to learn a chapter, directly off the app, it will remind whether to continue reading the next time you turn.