Programmer Group

One Day Command-screen screenMultiple Terminal Window Manager, which allows you to connect multiple local or remote sessions simultaneously and switch freelyUse: screen [ -options ] [ cmd [ args ] ] screen -r [[pid.]tty[.host]] screen -r sessionowner/[[pid.]tty[.host]] -A&nbs ...

For practical work, let's sum up here. It's easy to forget. mark it: 1) Temporary table: Search the Internet and compare the temporary table with the memory table. The table structure and data of temporary tables are stored in memory, and session starts and ends its life cycle. The table structure of the memory table is stored in the databa ...

1.splice 1. Role: Delete Usage: arr.splice(index,1); //delete index, the number of deletions is "1"; 2. Function: Replacement Usage: arr.splice(index,1, p); // Replace the value of index with P 2. Page Percentage Settings <div style="height:10%;"></div> 3.Angularjs default time control <input clas ...

Through Baidu search, "MySql transaction isolation level" and "InnoDB transaction isolation level" found many articles "characteristics" as follows: The key point is to explain: the difference between non-repeatable reading and hallucination reading; Most of the conclusions are: under the isolation level of repe ...

AFURLSession Manager is absolutely the core of AFNetworking. Responsible for creating and managing NSURLSession Managing NSURLSession Task Implementation of proxy methods in NSURLSession Delegate and other protocols Managing progress using AFURLSession Manager Task Delegate Using _AFURLSession TaskSwizzling Adjustment Method Introducing AFS ...

User authentication 1. Customer Authentication brief introduction Laravel makes it very easy to implement authentication mechanisms. In fact, almost all settings are done by default. Configuration files for authentication are placed in config/auth.php, and they also contain good annotations describing the corresponding authentication se ...

Android Camera ArchitectureSummary of Interprocess Communication Classes for Android CameraPhoto of Android Camera Module ResolutionVideo Recording with Android Camera Module ResolutionCameraDeviceCallbacks Callback Module of Android Camera PrinciplesopenCamera Module of Android Camera Principles (1)openCamera Module of Android Camera Principle ...

The general principle of mysqldump and the influence of DDL operation in the backup process of mysqldumpThe general principle of mysqldumpThe first caseThe second case The general principle of mysqldump and the influence of DDL operation in the backup process of mysqldump MySQL Version: 5.7.18 Isolation level: REPEATABLE-READ If th ...

What is Hibernate? hibernate is the framework of data access layer. It encapsulates JDBC and is an object-oriented solution for database access. The role of Hibernate? Hibernate can access objects directly. Hibernate automatically replaces this access with sql execution, which achieves the purpose of indirect access to the database and simpl ...

Study how View is displayed on the screen after the layout file is loaded, that is to say, study the display process of View. The following two aspects will be introduced: 1. The whole process of measurement, layout and drawing from loading layout file to view. 2. How are surface, surface Flinger and view related?   In Activity's onCrea ...