Programmer Group

How does thread security come about? Common examples are the operation of a non-thread-safe variable outside a thread within a thread. Thread security and synchronization must be considered at this time. - (void)getIamgeName:(NSMutableArray *)imageNames{//Suppose every entry is a thread. /*1.imageNames It is a variable outside the threa ...

Instruction Analysis of Lua5.3 Virtual Machine (1) Overview Summary Lua VM uses Register based VM. Instructions access operands in registers that have been allocated. Add a b C adds register b to the value in register c, and the result is in register a. Standard three-address instruction, each instruction has strong expressive ability, an ...

Recently, a batch of Centos 6.5 server network card binding operation has been completed. Because of the current network production environment, the operation is very cautious, but who knows there are still errors, the two servers directly ping is not working, ran to the computer room. All kinds of ups and downs. Therefore, I would like to shar ...

When we have a brand new computer, the first step is to download all kinds of software, watch videos, listen to music and so on. The key point here is to have a network. Nowadays, most personal computers are based on windows operating system. It is very simple to access network. It may be possible to access the Internet by plugging in the inter ...

Start or stop Start Mysql Server sudo /usr/local/mysql/support-files/mysql.server start Start the Mysql client sudo /usr/local/mysql/support-files/mysql.server stop mac preference settings start or close Configuration file settings Copy cnf files cp /usr/local/mysql/support-files/my-default.cnf /etc/my.cnf //Copy the default mysql conf ...

background Code commit and push to the remote warehouse, found that this submission of redundant files, such as no need for simple conflict-prone configuration files. Hope the remote code revokes this commit locally unchanged Re commit codeoperation First git log to view commit historySuch as: Now we need to cancel the three commits ( ...

This article is mainly reproduced from: Objective-C-Coding-Guidelines-In-Chinese Objective-C coding specification, content from Apple, Google document translation, your coding experience and summary of other information. Summary Objective-C is an object-oriented dynamic programming language that is mainly used to write iOS and Mac applications. ...

This article will introduce the use of curl. According to the common scenarios, it will provide the demo code and server code for calling curl to realize the request, which is convenient for everyone to learn and use. 1. View the Web Source Code The curl command is followed by a web address, so you can see the source code of the web page. ...

I. lvs 1. Noun Interpretation LVS is the abbreviation of Linux Virtual Server, which means Linux Virtual Server, is a virtual server cluster system. 2. Technical introduction of LVS The following quotation is from Baidu Encyclopedia [1] Technical Introduction LVS cluster adopts IP load balancing technology and con ...

Sed is a stream editor. It is a very useful tool in text processing. It can perfectly cooperate with regular expressions and has extraordinary functions. When processing, the currently processed rows are stored in a temporary buffer called pattern space, and then the contents of the buffer are processed with sed command. Afte ...