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Java concurrency programming from getting started to mastering-master

linkedblockingqueue;priority blocking queue Priorityblockingqueue;delay queue Delayqueue;synchronization queue Synchronousqueue;linked list bidirectional blocking queue Linkedblockingdeque;linked list transmission queue LinkedTransferQueue;synchronization counter Countdownlatch;abstract queue synchronizer Abstractqueuedsynchronizer;synchronization counter semaphore;synchronization counter cyclicbarrier; 6th: thread pool: newsinglethreadexecutor use; newcachedthreadpool; newfixedthreadp

Mastering the Linux kernel Design (13): Memory management process address space

area. Possible signs are Prot_read, Prot_write, Prot_exec and Prot_none. The first 3 marks are the same as those of the Mark Vm_read, Vm_write and Vm_exec. Prot_none indicates that the process does not have any of the above 3 access rights. flag: This parameter specifies additional flags for the virtual area. The function calls the Do_mmap_pgoff () function, which does the main work of memory mapping, the function is longer, detailed implementation can be viewed Since the mapping of the file to

Mastering the Linux kernel Design (12): Slab Allocator for memory management

long flags;trace_kfree (_ret_ip_, OBJP); if (Unlikely (zero_ Or_null_ptr (OBJP)) Return;local_irq_save (Flags) Kfree_debugcheck (OBJP); c = Virt_to_cache (OBJP);d Ebug_check_no_ Locks_freed (OBJP, Obj_size (c));d Ebug_check_no_obj_freed (OBJP, Obj_size (c)); __cache_free (c, (void *) OBJP); Local_irq _restore (flags);}Finally, in conjunction with the previous section,look at the selection of the allocation function:If you need a contiguous physical page, you can use a low-level page allocator o

Genetic algorithm Introduction to mastering (i)

process described earlier, and the reader can do a simple recall.The following is the notation for the gene mutation function for floating-point encoding:void Genalg::mutate (vectorIt is worth mentioning that the characteristics of the genetic mutation in genetics are similar to the genetic mutations in biology mentioned in the previous chapter, and recall here:1. Genetic mutations occur randomly, and the mutation frequency is very low. (Only a high probability mutation is required in some appl

CSS Tutorial: Mastering Z-index Properties thoroughly

. summarizing the cascading relationships in CSS is a complex topic. This article is not intended to be a discussion of all the details of this topic, but rather an in-depth discussion of how z-index affects the stacking order of our web pages. In this case, we will find that this CSS property is so powerful when it is truly fully understood. Beginners should now have a very good understanding of this attribute and avoid many of the problems that often arise in the course of their use. In addit

Record: 5 tips for Mastering the design of a single page website

also keep you from losing your target audience. Therefore, it is necessary to keep the user lightweight.ConclusionIn short, a single page design is an important way to attract users, to maximize its value, you need not only to do a good design, but also to grasp the above 5 important skills. Of course, the design of the site depends largely on the characteristics of the companies and institutions that the site serves, and the use of these 5 techniques is closely related. Combined with experienc

Lesson 8. html function (mastering)

What is HTML?HTML is actually the abbreviation of Hypertext Markup Language, Hypertext Markup LanguageHow do I rename a file? Right-click Rename Click F2 First, use Notepad to save a title and a two paragraph description, and then modify the plain text file with the. html extension, and then use the browser to openOpen after found that the format is not correct, the reason is that all the text in a plain text file is a sibling, the browser does not know what the meaning of the

A simple example of mastering Nodejs in one step

connection = Mysql.createconnection ({//create MySQL instanceHost: ' 127.0.0.1 ',Port: ' 3306 ',User: ' Root ',Password: ' Root ',Database: ' MyServer '});Connection.connect ();var sql = ' SELECT * from websites ';var str = "";Connection.query (SQL, function (err,result) {if (err) {Console.log (' [SELECT ERROR]: ', err.message);}str = json.stringify (result);Database query data is saved in result, but the browser does not directly read results in result, so it needs to be parsed with JSONConsol

Mastering Ajax, Part 1th: Introduction to Ajax

microsoft.xmlhttp the object again.3. If XMLHTTP is still not established, the object is created in a non-Microsoft way. Finally, XMLHTTP should refer to a valid XMLHttpRequest object, no matter what browser is running. A little explanation of security What about security? Browsers now allow users to improve their security levels, turn off JavaScript technology, and disable any options in the browser. In this case, the code will not work anyway. The problem must be dealt with properly at this t

Real Java learning from getting started to mastering

A, tool JDK (Java Development Kit) The JDK is the core of the entire Java system, including the Java Runtime Environment (Java Runtime envirnment), a stack of Java tools and a Java-based class library (Rt.jar). No matter what Java application Server is in essence a version of the JDK is built in. So mastering the JDK is the first step in learning java. The most mainstream JDK is the JDK that Sun releases, and many companies and organizations, in addit

Proficient Batch tutorial batch process from getting started to mastering _dos/bat

%d%==2 set a=3 If%d%==1 set a=2 If%d%==0 set a=1 Goto No/* Attached value complete jump no paragraph execution : File//Below are the Help tips after an error Echo IIsidq.exe didn't find it! Put the file in the same directory as this file! Goto exit : Error echo Error! Destination IP not recognized! Please use the following format to connect! echo idq [Destination IP] Goto exit : Error1 The echo connection did not succeed! Perhaps the target machine has patched up the vulnerability or

Mastering asp.net DataBinding

Asp.net|asp.net begin: Mastering asp.net DataBinding Karl Seguin? karlseguin@hotmail.com Table of Contents Introduction The Sample program Understanding DataItem Formatting Inline Onitemdatabound onitemcreated Nested Binding Inline Onitemdatabound Handling Events Download This article was available at Code Project. Check it out to make comments, discuss or rate the article I ' d like to thank Jean-claude Manoli for Developing's his C # Code forma

Mastering Ajax, part 10th: data transfer using JSON

Manipulating JavaScript objects in native mode Introduction: When sending and receiving information in an asynchronous application, you can choose to use plain text and XML as the data format. This issue of mastering Ajax discusses another useful data format, JavaScript Object Notation (JSON), and how to use it to move data and objects more easily in your application. If you have read the previous articles in this series, you should have a good unde

Hibernate from Getting started to mastering (10) Multiple to multiple one-way correlation mapping

Previous article hibernate from getting started to mastering (ix) A pair of multiple bidirectional association mappings we explained the relevant content of a one-to-many correlation mapping, this time we continue to multiple one-way association mappings. Multi-pair multiple one-way association mappings Before explaining the multiple to multiple one-way association mapping, first look at the relevant class diagram and code, as follows: public cl

Hibernate from Getting started to mastering (vi) One-to-one bidirectional Association mapping.

In the last blog post hibernate from Getting started to mastering (v.) one to one one-way association mapping we explained one to one one-way association mapping, this time we continue to explain the corresponding one-to-one two-way association mapping. A one-to-one two-way association differs from a one-to-one one-way association mapping in a one-to-one two-way association where a reference to another object (Idcard) is present in one object (person)

Oracle SQL is still irreplaceable-"Mastering Oracle SQL"

Oracle cold, stay at home and read the "Mastering Oracle SQL" 2nd, found that Oracle's function is still very strong, there are 200 optical functions, hsql is difficult to match. The next stubborn, it seems either to risk using Hibernate3.0 SQL mapping function, or to run the JDBC assembly VO. 1. Report Totals dedicated Rollup function Sales Report Guangzhou January 2000 Yuan Guangzhou February 2500 yuan Guangzhou 4500 Yuan Shenzhen January 1000 yuan

MySQL Basics (MySQL from getting started to mastering feedback)

same time char and varchar The biggest difference is that char regardless of the actual value will occupy n characters space, and varchar will only occupy the actual character should occupy +1 of the space, and the actual space +13. After the n setting of char and varchar is exceeded, the string is truncated.The upper limit of 4.char is 255 bytes, the upper bound of varchar is 65535 bytes, and the text is capped at 65535.5.char will truncate the trailing spaces when stored, varchar and text wil

SQL Server 2008 from getting started to mastering--20180710

statement block, and the statement of the TRY statement block is no longer executed.4. Common functions 4.1. Data type Conversion functionsBy default, SQL Server automatically converts some data types, which are called implicit conversions. If you encounter an automatic conversion, you need to convert it with the cast () function and the Convert () function, which is called an explicit conversion. The cast () function and the convert () function are the same, and the cast function is easier to

SQL Server 2008 from getting started to mastering 20180627

‘;Attaching a databaseAttach the database to a different server instance using the detached data file and transaction log file. You can attach replicated and detached databases.Attach Database command No log attach database commandCREATE DATABASE test ON( FILENAME=‘C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\test.mdf‘ )FOR ATTACH_REBUILD_LOG;Multiple. mdf,.ndf,.ldf file Attach database commandsCREATE DATABASE School_MIS ON(FILENAME=‘E:\教务管理系统_DATA.mdf‘),(FILENAME=‘

Sqlmap Getting started to mastering

Tags: penetration testing Sqlmap Https://github.com/sqlmapproject/sqlmap Https://github.com/sqlmapproject/sqlmap/blob/master/doc/translations/README-zh-CN.md DVWA penetration testWeb vulnerability testing program for Web vulnerabilities teaching and testingThis article is from the "O

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