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Introduction to Android Intro 3G, 4G Third generation mobile communication technology (3rd-generation), the rate is generally hundreds of kbps, compared to the previous 2G and 2.5G in the data transmission speed is greatly improved.

Basic usage of nsdictionary and nsmutabledictionary1. Immutable Dictionary NsdictionaryDictionary initializationNSNumber *numobj = [NSNumber numberwithint:100];Class with an element.Nsdictionary *dic = [nsdictionary dictionarywithobject:numobj

Summary:MongoDB 3.0 Security access control, in the addition of users above the 3.0 version and the previous version there is a big difference, here is the next 3.0 of the method of adding users.Environment, testing:After installing MongoDB, first

Strong -Fire -NET (Liehuo -. Net) teaches -Cheng recently to download the column to add a key reprint function, fire download column is the use of dedecms construction, we all know Dede not a key reprint function, so had to write a, and finally

namespaceYongfa365.validator {usingSystem;usingSystem.Text.RegularExpressions;/// ///RegExp soruce:http://regexlib.com/DisplayPatterns.aspx ///Author: Liuyongfa yongfa365http://www.yongfa365.com/[email protected]///Intro: Verify URL, IP,

Mysql optimization: 1. Database Design Optimization 2. SQL statement optimization 3. table partitioning 4. read/write splitting Technology 1. Database Design Optimization 1. table design must comply with the three paradigms. of course, sometimes we

Beckham _ mysql optimization learning, and Beckham _ mysql OptimizationMysql OptimizationBrief:1. Database Design Optimization2. SQL statement Optimization3. Table Segmentation4. read/write splitting technology   I. Database Design Optimization 1.

Reprint: "Xiachuntao email: [email protected] Blog:http://www.cnblogs.com/summerrain"Long-term development of the. NET mis system, to the most or the database. Nothing to do, to pick up the flowers, the. NET database programming all the way to the

Mysql index and Optimization: 1. what is the index? 2. index type and syntax. 3. full-text index description. 1. what is the index? 1. take the book directory as an example. view the directory, then find the corresponding content. Therefore, the

Function: Extract various fields from the output of the input file or commandUsage: cut–c{string range}–d{field separator}–f{field index number}Example:(1) View online users: Who | Cut–c1-8(2) List of user names obtained from System file/etc/passwd: