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Note: Although the document is very comprehensive, this article is mainly for quick completion in one day, so please forgive me for the shortcomings.The code is based on matlab terminal called by vscode/py 3.6Basic mathematical operation and matrix operationBasic grammarvariableNo declaration requiredAssign a value to a variable with =Variable ...

C + + type conversion function: converts the type of the current class to other types The conversion constructor can convert other types to the current class type (for example, convert double type to Complex type), but it cannot convert the current class type to other types (for example, convert Complex type to double type). C + + provides a ...

Detailed explanation of C++ throw In the previous section, we talked about the process of C + + exception handling, specifically: Throw – > Try - > Catch Exceptions must be explicitly thrown before they can be detected and caught; If there is no explicit throw, even if there is an exception, it cannot be detected. In C + +, ...

Propositional logic and examples Logic symbols have been used in previous examples, mainly symbols such as \ a, \ e, = >. \E E is the initial letter of "exists", which means existence. When writing down \ e x \ in S: P (x) means that there is at least one X in s, making p true. The return value of an expression starting with \ e ...

1, Introduction 1. Concept Synchronization: synchronization refers to the sequential execution of the whole processing process. When each process is completed, the result is returned. Asynchrony: asynchronously invoking is just sending the called instruction, and the caller does not need to wait for the called method to be fully executed; ...

1, Bash script set command 1. Introduction Set command is an important part of bash script, but it is often ignored, resulting in problems in the security and maintainability of the script. When bash executes the script, it will create a new Shell. If there is an error in the execution process, bash will ignore the error and continue to e ...

1, Docker new port mapping 1. Introduction When docker run creates and runs containers, you can specify port mapping rules through - p. However, once the container is generated, no command can be modified directly. Generally, there are two ways to add or modify mapping ports. The environment here is Ubuntu 20 04 New containerModify conta ...

summary The last article talked about very common Set set . From the article, we know that Set is an ordered single column Set. Of course, it can solve many problems in life, but the elements in our Set are not all isolated single elements. Some of them will have a certain corresponding relationship (mapping relationship), such as the cor ...

1. Introduction and installation of Kali Linux 2 1. Introduction to Kali Linux 2 Kali Linux 2 is an operating system for professional penetration testing and security auditing, which was developed from the previously well-known Back Track system. Back Track was once the best penetration test operating system in the world and achieved great su ...

Preface As a cached database, Redis currently has a large usage in the market. Most people use its string format storage in their work. For the rest of the data structure, it is rarely used. The basic data structure of Redis includes: string, hash, list, set, sorted set. These five data structures are often used in different scenarios in ...