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1. you are unfamiliar with the subject area.
2. you can read / understand the most fundamental aspects of the subject area.
3. ability to implement small changes, understand basic principles and able to figure out additional details with minimal help.
4. basic proficiency in a subject area without relying on help.
5. you are comfortable with the subject area and all routine work on it:For software areas - ability to develop medium programs using all basic language features w/o book, awareness of more esoteric features (with book).For systems areas - understanding of many fundamentals of networking and systems administration, ability to run a small network of systems including recovery, debugging and nontrivial troubleshooting that relies on the knowledge of internals.
6. an even lower degree of reliance on reference materials. Deeper skills in a field or specific technology in the subject area.
7. ability to develop large programs and systems from scratch. Understanding of low level details and internals. Ability to design / deploy most large, distributed systems from scratch.
8. you understand and make use of most lesser known language features, technologies, and associated internals. Ability to automate significant amounts of systems administration.
9. deep understanding of corner cases, esoteric features, protocols and systems including "theory of operation". Demonstrated ability to design, deploy and own very critical or large infrastructure, build accompanying automation.
10. could have written the book about the subject area but didn't; works with standards committees on defining new standards and methodologies.
11. wrote the book on the subject area (there actually has to be a book). Recognized industry expert in the field, might have invented it.

前不久在网络上看见一个很不错的jQuery的DataTable表格插件。后来发现在MVC中使用该插件的文章并不多。本文将介绍在MVC3.0如何使用该插件。在介绍该插件之前先简单介绍一下，推荐该插件的原因。
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前不久在网络上看见一个很不错的jQuery的DataTable表格插件。后来发现在MVC中使用该插件的文章并不多。本文将介绍在MVC3.0如何使用该插件。在介绍该插件之前先简单介绍一下，推荐该插件的原因。
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# 写在前面 　　相信正在浏览这篇文章的同学，一定已经对PB（Protocol buffer）有所了解，所以这里不罗嗦何为PB了。 　　我自己从去年年底开始对PB的使用逐渐有一些了解，直到在搜索排序框架(iRank)的重构中尝试应用PB，希望能在“数据结构灵活增删改”和“高效的数据传输反序列化”之间求得平衡。 　　在这过程之中，对PB 动态消息和静态消息的C++使用方式进行了一些调研
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