Merge pull request #822 from yangboz/patch-1

Update free-programming-books-zh.md
11 years ago · 2724383bbe
parent ae809254e3 d806a9c996
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 * [Udacity](https://www.udacity.com/)
 * [xuetangX](https://www.xuetangx.com/)
 * [Codecademy](http://www.codecademy.com/?locale_code=zh)
+* [CodeSchool](https://www.codeschool.com/)


 ###软件开发方法