cs
1/ Composing Programs 是 CS 61A 使用的教材，不想看课程视频的也可以直接看这本电子书。
1/Composing Programs is a textbook used by CS 61A. Anyone who doesn't want to watch the videos can read this ebook directly. The book covers:
书中涵盖了： The book covers:
Python 语法 Python syntax
CS 的基本概念
The basic concept of CS
Scheme 语法 & 解释器相关概念
Scheme syntax & interpreter related concepts
附赠了 4 个 project，最后一个 Scheme 解释器的项目非常推荐做一下。
It comes with four projects, and the last one for the Scheme interpreter is highly recommended.