how to learn nodejs

 https://www.quora.com/What-is-the-best-way-of-learning-Node-js 
 http://dmitrysoshnikov.com/ecmascript/javascript-the-core/

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions#Determining_whether_a_function_exists

http://martinfowler.com/articles/injection.html

5 Tips to Increase Node.js Application Performance

https://dzone.com/articles/5-tips-to-increase-nodejs-application-performance

 

understanding nodejs event loop
http://blog.mixu.net/2011/02/01/understanding-the-node-js-event-loop/

http://blog.csdn.net/fengyinchao/article/details/52512462

nodejs stream
https://www.sitepoint.com/basics-node-js-streams/

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Inheritance_and_the_prototype_chain

Javascript继承机制的设计思想
http://www.ruanyifeng.com/blog/2011/06/designing_ideas_of_inheritance_mechanism_in_javascript.html