mcsa study

Linux cainiao Study Notes-system partitioning and linux Study Notes Hard Disk Partition knowledge Primary partition: up to four Extended partitions: used to break the limit of up to four primary partitions * Up to one * A maximum of four primary partitions and extended partitions can be created. * Data cannot be written and can only contain logical partitions. Logical Partition Format: write data to the fi

Java Study Notes 27, java Study Notes Vector is the implementation class of the List interface and supports all functions of the List interface. The Vector class is a List class implemented based on arrays and encapsulates a dynamic, The Object [] array that allows redistribution. The Vector is thread-safe and requires no program to ensure the synchronization of the set. Some methods of the Vector class a

[Database Study Notes] (1) JDBC driver category and Study Notes jdbc There are several methods for jdbc to load database drivers: Type 4: Local protocol driver Type 1: jdbc-odbc bridge Jdbc-odbc bridge is provided by sun and is a standard api provided by jdk. this type of driver actually transmits all jdbc calls to odbc, and then odbc calls the local database driver code. (the local database driver

CUBRID Study Notes 27 Data Type 4, cubrid Study Notes Range comparisonComparison between numbers and strings The string is converted to double. SELECT I FROM t WHERE I I ================== 1 2 3 4Comparison of string and date and time Convert string to date or time SELECT s FROM t2; S ====================================== '2014/1/123' '2014/1/123' '2014/1/123' SELECT s FROM t2 WHERE s S =============

HTML study note 2 (Back to Top and back to bottom), study note back to top Back to Top back to bottom Two methods to return to the topI. Use js $ ('Html, body '). animate ({scrollTop: 0}, 'save'); // $ ('html, body') with animation '). scrollTop (0); // No animation $(window).scroll(function () { //You've scrolled this much: $('p').text("You've scrolled " + $(window).scrollTop()

JavaScript advanced programming (Third edition) Study Notes (2), javascript Study NotesChapter 5 Literal representation Var person = {name: "a", age: 10, 5: true // The value property name is automatically converted to a string }; "First name" contains a space, so it cannot be accessed using dot notation, but it can be accessed by person ["first name"] Each item of the array can save any type of data.

C/c ++ Open Course Study Notes-Hacker code analysis and prevention, and wisdom podcast Study Notes Hacker code Analysis and Prevention notes [Course Introduction] C/C ++ language is similar to the underlying computer language except assembly. Currently, mainstream operating systems such as windows, linux, iOS, and Android are all written in C/C ++, therefore, many viruses and Trojans are implemented using

[Plan Theory] Plan Study Notes, Plan Theory Study Notes Why should I learn the plan now?Because the plane plan was determined by Shun-cutting HNOI2010... ------------- The line cut is me> w First, there are some definitions: What is a floor plan?For a graph G = PlanSurface:For a plan, if some edges are enclosed and the area does not contain the vertices and edges of the plan, this area is called a plane of

Struts2 study notes 18 (International) and struts2 Study NotesJava Internationalization Program internationalization:The program can automatically translate content according to the country and language environment where the machine is located.The essence of internationalization is: search, replace, and find the language and text corresponding to the keywords in the corresponding country from the resourc

MySQL Study Notes 01 _ basic database knowledge, mysql Study Notes01_1 mysql database Start and Stop Start cmd with Enter net stop mysql to stop mysql service; Enter net start mysql to start the mysql service; Enter mysql-u root-p and press Enter. Then, enter the password to enter the mysql operating system and have the root permission; Object Name Corresponding keyword Description Table Table A tab

Html Study Notes 3. html Study Notes1. Table title and header: 2. Merge rows: 3 label File address of the src ImagePrompt text when the alt image cannot be displayedTitle text with the mouse over the image 4. relative and absolute paths of images I. "webpage 1" references pictures of one piece If you reference the image "one piece" on "webpage 1", there are two ways to write the image path: State

HTML Study Notes (JavaScript) No. 4, Study Notes No. 4The JavaScript statement sends a command to the browser. The statement is used to tell the browser what to do. The statement is separated by semicolons. Note: semicolons are optional. Sometimes they are not separated by semicolons.JavaScript is executed in programming order. Identifier:JavaScript identifiers must start with letters, underscores, or doll

Data storage type of MySQL study notes, mysql Study Notes Note: This article is a summary of the MySQL database data storage type.Numeric Type (number Type) 1、TINYINT、SMALLINT、MEDIUMINT、INT、BIGINTIt is mainly divided based on different storage Bytes: TINYINT: 1 byte SMALLINT: 2 bytes MEDIUMINT: 3 bytes INT: 4 bytes BIGINT: 8 bytes If you do not need the number of symbols, we recommend that you add un

Swift Study Notes (23)-Swift generic knowledge, swift Study Notes The concept of generics also exists in Java. Generics can make code more refined and are an optimization for data types. Now there is the same requirement: Write a struct, and then judge whether the integer is equal. The implementation code and output are as follows: . If there is another demand, you need to determine whether the two flo

[Shell Study Notes] curl command summary, shell Study Notes curlWen si haihui==============CURL command Summary1. DownloadCurl-o [file name] www.baidu.com2. Display HTTP request header informationCurl-I www.baidu.comShow HTTP response header informationCurl-I www.baidu.com3. display detailed communication processCurl-v www.baidu.com4. Send form information4.1), GET method:Curl example.com/add? A = 1 B = 24

Introduction to algorithms Study Notes (2)-merge and sort, Introduction Study Notes Today, I learned the Merge Sorting Algorithm in the introduction to algorithms and completed writing pseudocode on paper. I have learned how to merge and not understand it thoroughly. I am still confused: Why is the merging and sorting more complex than the fast sorting time? Why does the database function use the fast so

Linux Study Notes and linux Study NotesLinux is a free and free-to-use Unix-like operating system. It is a POSIX and UNIX-based multi-user, multi-task, multi-thread and multi-CPU operating system. It can run major UNIX tool software, applications and network protocols. It supports 32-bit and 64-bit hardware. Linux inherits the network-centric Unix design philosophy and is a stable multi-user network operati

OpenCms9 Study Notes (1) -- OpenCms9 introduction and opencms9 Study Notes OpenCms is an open-source CMS with rich functions and powerful features. It is easy to handle small sites and widely used technologies-java and xml. User-oriented OpenCms is very suitable for building highly complex websites with multi-language support, and the website can be edited by a variety of users, with different permissions

(Target: Embedded)School CoursesHigh number/Linear algebraCircuit BasicsDie-PowerNumber of electricityPrinciple of microcomputer (8086)High frequencyC language　　　　Vc　　　　EdaOther: communication principles , digital signal processingSelf -　　　　Java (Basic)C # (Basic)Android App Development (learn)　　　　Practice 51 Single chip microcomputer development Write a loop interrupt in the main program C Language Foundation, compilation x128 (Freescale) Write the

PHP learning Notes 1-constant, function, php learning Notes 1-constant. PHP learning Notes 1-constant, function, php learning Notes 1-constant: use const (php5) declaration, can only be assigned once, php5 and earlier versions use define; 1? Php2constTHE_VALUE PHP Study Notes 1-constants, functions, php Study Notes 1-constants Constant: the const (php5) statement can only be assigned once. define is used f