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Message Sending ( Messaging )8, the above is the runtime related to some data structure, then we look back at the beginning of the question:How does the Objc_msgsend () function find the corresponding class in the process of execution, and find the corresponding method to implement it?This is the process of message sending (messaging):(1), for the description of the data structure of class above, the official documents are summarized in two parts: a p

recently learning CentOS 7 system Management, using the "CentOS 6.X System Management Practical Treasure" a book------because the online purchase of CentOS 7 book has not been sent to O (' '!) o~(1) First install the Webmin using the Yum method:Webmin cannot be installed by default with Yum because the software is not stored on the official site. Although it was

Talking about high concurrency (6) implementation of several spin locks (1) This article implements two basic spin locks: taslock and ttaslock. Their problems are frequent CAS operations, leading to a large amount of consistent cache traffic, resulting in poor lock performance. One improvement of ttaslock is backofflock, which rolls back the thread in case of high lock contention to reduce competition and cache consistency traffic. However, backofflo

other things... that's why compile does not have the scope parameter, because it hasn't been compiled yet ~ Code test address: http://jsfiddle.net/0kgn110u/1/ To sum up all the knowledge just mentioned: 1. the execution sequence of the compile function is from the parent element to the child element. when the compile of a command is executed, the compile of its parent element has been executed. its tele pa

For work reasons, I tried to connect SQL7 to ORACLE and directly access the ORACLE database in SQL7. below I will briefly describe this method. At that time, the slave server was used to directly connect to the peer database. 1. first install the ORACLE client on the SQL Server, and set it. 2. then open ENTERPRISEMANGER, which is the same as yesterday's SQL Server. I tried to connect SQL

(improve performance) {Insertsort (arr, right-left);}//int div = PartSort1 (arr, left, right);int div = PartSort2 (arr, left, right);int div = PARTSORT3 (arr, left, right);QuickSort (arr, left, Div-1); QuickSort (arr, div + 1, right);} non-recursive implementation quick sort VOIDNBSP;QUICKSORT_NONR (int*arr,intleft,intright)//fast Sort---non-recursive method (using stack) { ASSERT (arr);stackMerge sort (Me

Question: This article is a companion article on Linux/Window 7 Telnet configuration. Because it is too long to be put together and affects reading, I will put the telnet configuration of Windows 7 in this article. Body: The last time I talked about Linux Telnet configuration, my sister Win7 was not willing to show weakness and expressed a strong protest: How can I lose my "million fans?

same as the dependency injection Code implemented by programmers. Make the code completely traceable, so that we can better understand the code running mechanism. The scalability of Dagger 2 may be slightly reduced, but the APIs of Dagger 2 are much clearer and easier to use than that of Dagger 1. Our team is still developing. When we rewrite an application, i

13. C # division type and static class (chapter 7, Chapter 2-7.1 ), If you don't find anything big, you will lose it. If you don't remember anything small, you will forget it. Today, I want to write the branch type and static tool class in C #. These two concepts may have been used in our daily use, maybe you think this is not something you should have. Let's review it. The Division type. In my personal und

Build JEESZ distributed architecture 2 -- install Tomcat 7 (Environment preparation) and jeesztomcat7 in CentOs Declaration: Because the runtime environment is based on the Linux system, some preliminary environment preparations are required before the framework is implemented.Many instances of Tomcat 7 are installed in CentOs. As the post-blog serves as the nati

Overview I. Items to be learned: 2,System functions after Configuration 6,Pre-configuration items should be sorted and summarized 7,The business processes sorted in the early stage are carefully and read one by one to ensure the quality of the business blueprint work. 2. Completed Projects: 3,Stored Procedure1Class -- usedSBOA stored procedure is triggered before

30 things to be done after minimal RHEL/CentOS 7 installation (2) 7. install PHP PHP is a server-side scripting language used for basic web services. It is also often used as a general programming language. Install PHP in CentOS with minimal installation: # yum install php After installing php, restart the Apache service to render PHP in the Web browser. # s

/SpecificationsOverview.mspx My solution is to directly load the TTF file for parsing and dynamically generate a font in the memory. The above link is Microsoft's description of the TTF file format. I got it in the middle of the night, using simsunb. TTF is the test object, and the basic data of the font file is read and analyzed. The rest is the analysis and display of the profile data. 10% degree of completion for the entire solution. The usage is as follows, all of which are pseudo

This Windows Phone 7 developer training package contains 8 appsProgramInstances and four xNa game instances: 1. hellophone-Hello Windows Phone 2. yourfirstwp7application-create your first Windows Phone 7 Application 3. windowsphonenavigationandcontrols-Windows Phone navigation and controls 4. usingpushnotificat

Day 7 part 2, androidpart Day 7 part 2, the road to getting started with Piggy's Android Data storage and access in Android -- SharedPreferences (save preferences) --- Reprinted with the source: coder-pig This section introduces: In Part 1, we learned how to read and write f

can be used as hints, OK and input, corresponding to three functions: alert, confirm, prompt.(1) Alert: This dialog box is for reminders only and cannot have any changes to the script. It has only one parameter, which is the information that needs to be prompted, and there is no return value.Case:：(2) Confirm : This dialog box is typically used to confirm information. It has only one parameter, and the ret

I have been learning Windows Phone 7 for some time and have also sorted out some good knowledge points. The following series will share 10 Windows Phone 7 tips for each blog and provide offline document downloads. 1. Windows Phone 7 ApplicationsProgramCannot run in the background, does not support multi-task[Ho

different virtual hosts• Limit different open_basedir for different virtual hostsWith Php_admin_value Open_basedir "/data/wwwroot/111.com:/tmp/" to limit the directory, and for a number of different virtual hosts to restrict different open_basedir, you can use the first virtual host above to limit(Why take temporary files?) Because the default temporary files under/tmp/, so that even temporary files are not written)[Email protected] php-7.1.6]# curl-a "a4l"-x127.0.0.1:80 111.com/

core thread pool size. Otherwise proceed to 3. Create a new Work queue (thread, refer to previous section), successfully returned directly, failed to 4. If the thread pool is running and the task joins the thread pool queue successfully, proceed to 5, otherwise 7. If the thread pool is closed or the thread pool size is 0, make 6, otherwise return directly. If the thread pool is closed, the deny policy is returned, otherwise a new thre

public int Qiuyang (int cun){int sum = 0;if (cun==7)//If the seventh village has 2 left, then the function ends{sum = 2;return sum;}sum = (Qiuyang (cun + 1) + 1) * 2; (Number of Next village +