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Function pointer array 1. Pointer function Pointer function refers to the function with pointer, that is, it is essentially a function. All functions have a return type (if they do not return a value, they are valueless), but the return type of pointer function is a pointer of a certain type. Its definition format is as follows: Return t ...

spring is a framework, a container and an ecosystem!. spring is singleton by default and supports circular reference. When changing to multiple instances, it is not supported. scope=“prototype” 1.bean life cycle class - > instantiation - > Object - > attribute filling (dependency injection: @ Autowired attribute assign ...

you 're right! Those who understand the basics of Linux understand this command! rm -rf . If this command is not used properly, its lethality is extremely high!The famous rm -rf tragedy!On May 28, 2015, Ctrip suspected that the service was suspended due to the wrong operation of employeesOn February 2, 2017, GitLab administrator mistakenly de ...

Flink version 1.13 In some scenarios, the state of Flink users has been growing indefinitely, and some use cases need to be able to automatically clean up the old state. For example, an extremely long time window is defined in the job, or an infinite range of GROUP BY statements are applied to the dynamic table. In addition, at present, devel ...

GUI introduction Graphical User Interface (GUI) refers to the computer operation user interface displayed graphically. Graphical User Interface is an interface display format for communication between human and computer. It allows users to use input devices such as mouse to manipulate icons or menu options on the screen to select ...

Characteristic engineering concept: Feature engineering transforms raw data into more representative data prediction model The process of features of potential problems can be realized by selecting the most relevant features, extracting features and creating features. Among them, feature creation is often realized by dimension reduction algor ...

When learning becomes a habit, knowledge becomes common sense. Thank you for your attention, likes, collections and comments. The new video and articles will be sent to WeChat official account for the first time. Li Yongning The article has been included in github warehouse liyongning/blog , welcome to Watch and Star. Special instructions D ...

Article catalogue1, Current limiting algorithm1. Counter algorithm1.1 fixed window algorithm1.2 sliding window algorithm2. Token bucket algorithm3. Leaky bucket algorithm2, ASP Net core middleware to realize current limiting1. Middleware code2. Use in pipeline1, Current limiting algorithmIn high concurrency systems, there are three sharp tools ...

by Tahir preface The annual network security construction achievement test is about to begin. In the most critical battle of the actual attack and defense drill of network security, office application system, Web middleware and database are the main attack objects of the attacker. Due to the largest use, the database often becomes one of the ...

Set 54: In the given program, the function of function fun is to calculate the sum of the values in the data field of each node in the one-way linked list with head node and return it as the function value. Please fill in the correct content in the underline of the program and delete the underline to make the program get the correct result. No ...