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Depth operator overload (2) 1. When an operator is overloaded, when is it returned as a reference and when is it returned as a value? Return as value: Int operator+(const Int& it) { this->value += it.value; return Int(this->value + it.value); } Return by reference: Int &operator+=(const Int &it) { ...

1 what is Docker Compose When we define the container, we use the command of Docker and build Docker, and then use the command of Docker. However, the application system of microservice architecture generally includes several microservices, and each microservice will generally deploy multiple instances. If each microservice needs to be started ...

Overview: Introduction: role, status, impact of not controlling concurrency Usage: object lock and class lock 7 cases of multithreaded access synchronization method Nature: reentrant, non interruptible Principle: add unlock principle, reentrant principle, visibility principle Defects: low efficiency, not flexible enough, unable to predic ...

1, Introduction HashMap is implemented by hash table, with key/value storage structure. Each key corresponds to a unique value. The speed of query and modification is very fast, and can reach the average time complexity of O(1). It is non thread safe and does not guarantee the storage order of elements; 2, Inheritance class diagram hashMap im ...

One of the main purposes of DVC repository is version control of data and model files. DVC also supports the reuse of these data artifacts across projects. This means that your project can rely on data from other DVC repositories, just like a package management system for data science. We can build a DVC project dedicated to version control ...

Write in front In the previous chapter, we have analyzed how Sentinel makes SentinelResource annotation effective. One question is reserved. Each method annotated by SentinelResource will first call the following code in the surround notification entry = SphU.entry(resourceName, resourceType, entryType, pjp.getArgs()) , this article continu ...

Node overview All contents in a web page are nodes (labels, attributes, text, comments, etc.), and nodes are represented by nodes in DOM. All nodes in the HTML DOM tree can be accessed through JavaScript, and all HTML elements (nodes) can be modified, created or deleted. Generally, a node has at least three basic attributes: nodeType, no ...

This paper is mainly based on Hou Jie's MFC in simple terms, and mainly describes the MFC message mapping and transmission mechanism. How to form a message mapping network 1 add the code of message mapping table in the source file First, you must declare the message mapping table in the header file (. H) class CScribbleDoc : public CDocumen ...

Load MYSQL database driver The development tool used by the author is IntelliJ IDEA, and other integrated environments have similar principles. Download MYSQL database driver JDBC is java data base connectivity. In order to access the database on the MySQL database server, the application must ensure that the corresponding JDBC-MYSQL driver ...

Write in frontReact Hooks is a new mechanism launched by the react team in version 16.8 two years ago. As the most mainstream front-end framework, react's API is very stable. The release of this update shocked many front-end bosses who fear the new wheel. After all, each update is a high-cost learning. Is it easy to use?The answer is easy to us ...