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CNNIC conducted a survey on sub-populations A, B, and C.

(I) Individual Survey of Internet Users 1.1 Survey Overall China has permanent residents aged 6 and over with residential landline (home phone, PHS, dormitory phone) or mobile phone. ◇ Sample size The sample size is 30,000, of which 15,000 are residential landline users and 15,000 mobile phone users respectively. The sample covers 31 provinces, autonomous regions and municipalities directly under the Central Government in mainland China. ◇ Survey overall breakdown http: //img2.cache.netease.com/tech/2014/7/21/20140721091128f09 ...

FAQ: C # delegates and events

I believe many people have been puzzled by C # delegates and events, especially in C # beginners, it will feel more difficult to learn this part, very likely to give up, and.   NET for delegates and events encapsulation is very good, generally not how to use custom delegates and events, so give up learning the technology has an excuse! There are a number of such articles on the web, most representative of Zhang Ziyang's C # delegates and events this article, the writing is very good, received a lot of readers praise, but I read the comments, or found some problems, because there are many readers are read over and over, each feeling is quite ...

Simple Crackme (aescul) analysis

"Crack Author" analog "Author mailbox" yuchaochina@hotmail.com "use tool" ollydbgv1.10,peidv0.93 "crack Platform" WinXP "software Name" Aescul.exe (crackme) "Add shell Way "No" crack statement "I am a little rookie, I have a little experience, would like to share:"-------------------------------------------------...

Foreign English Directory Index---Yahoo

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology Hall yahoo!--search engine King, one of the earliest directory index, is currently the most important search service site, in all Internet search applications accounted for about 36% of the share. In addition to the main station (Mother Yahoo), also has the United States metropolitan cities (Yahoo cities, such as the Chicago Sub-station), country stations (such as Yahoo China) and international regional stations (such as Yahoo Asia). The registration site in its database is either in the form or ...

Java and schema: compositing patterns

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall Synthesis (composite) mode is a very important design pattern, The compositing pattern organizes objects into trees to describe the relationship of the tree. First, the schematic diagram is visible from the schematic diagram, File, the folder all can treat the reed ifile Equally, provides the great convenience for the object management. Of course...

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Using regular expressions to modify strings through the Python re module

So far, we've simply searched for a static string. Regular expressions are often used in different ways to modify strings by using the ' Regexobject ' method below. Method/Property Split () slices the string where the RE matches and generates a list. Sub () finds all the substrings that the RE matches and replaces the SUBN () with a different string () as the sub (), but returns the new string and the number of substitutions to fragment the string Regexobject ' ...

2017 Double 11 Technology Secret - TDDL/DRDS Class KV Query Optimization Practice

The core concept of sub-library table is based on MySQL storage. Solving the problem of data storage and access capacity, the product supports the database traffic of previous Tmall double eleven singles day core transaction links, and gradually grew into the standard of Alibaba Group access relational database.

The classification system and performance evaluation of search engine Yahoo

The intermediary transaction SEO diagnose Taobao guest Cloud host technology Hall at present many search engines are the manual compilation of hierarchical theme directory and computer search software to provide keywords such as search methods to complete the Network Information Resources organization task. Yahoo is the typical representative of this class-style theme-Guide search engine. Yahoo's charm lies in its browsable ranking theme index. Based on the theme of the classification index, providing a comprehensive classification architecture, and combining high-quality search software, Yahoo successfully built a unique set of letters ...

Large Data processing interview problem summary

1. Given a, b two files, each store 5 billion URLs, each URL accounted for 64 bytes, memory limit is 4G, let you find a, b file common URL? Scenario 1: The size of each file can be estimated to be 50gx64=320g, far larger than the memory limit of 4G. So it is not possible to fully load it into memory processing.   Consider adopting a divide-and-conquer approach. s traverses file A, asks for each URL, and then stores the URL to 1000 small files (recorded) based on the values obtained. This ...

Learn 10 basic knowledge of php summary

Learn 10 basic knowledge of PHP Summary Read some of the basics of PHP, I summarize here: 1, embedded in the HTML PHP script there are three ways: The following is quoted content: <script language = "php"> / / embedded Way an echo ("test"); </ script> <? // embedded two echo "<br & g ...

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