要求：有编程经验和能理解基础电路。

Requirements: basic programming skill and basic understanding of electrical circuits.

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本书内容循序渐进、实例丰富、解释细致，不仅适合初学者和编程爱好者，对于有编程经验的用户也会有一定的帮助。

The contents of this book step-by-step, example-rich, detailed explanation is not only suitable for beginners and programming enthusiasts, who have programming experience, users will also help.

youdao

说一下我自己吧，我在RoR方面已经有了三年的编程经验，大多数时间都是作为一个订约人(Contractor)工作的。

As for me personally, I've been programming Ruby on Rails for almost 3 years now, spending a majority of the time as a contractor.

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