#Network programming -- Example of TCP ECHO echo programming

Article directory Flow protocol and packet sticking Sticky bag readn writen Client sends fixed length package code Echo client / server echosrv.c echocli.c Reference material Flow protocol and packet sticking TCP is a transport service based on byte stream. It has no boundary and can not guar ...

Posted by dethron on Tue, 25 Feb 2020 23:16:25 -0800

Chapter 13.5 dynamic memory management exercises and summary in C++ Primer

13.5 dynamic memory management class The best way to manage dynamic memory in a class is to use containers or smart pointers, but maybe if we want to design a set of libraries ourselves, we need to keep the performance of this library at a better level. At this time, we may need to use some lower leve ...

Posted by maxudaskin on Tue, 25 Feb 2020 22:52:03 -0800

Scope, scope proxy and corresponding examples of spring beans

Scope of bean The annotation Scope of spring Component has several common scenarios, such as singleton, prototype, request, session and global session. This annotation can be used with @ Component and @ Bean. In particular, Scope annotation can be divided into ConfigurableBeanFactory and WebApplicatio ...

Posted by olsrey on Tue, 25 Feb 2020 22:50:08 -0800

[python data analysis (11)] Pandas for text data processing (string judgment, data processing at both ends, replacement and segmentation, basic index)

1. Pandas for text data processing 1) Pandas is equipped with a set of methods for strings, which makes it easy to operate on each element of the array; 2) Access through str and automatically exclude missing / NA values, 3) For example, the method of. str.contains() in membership judgment was mention ...

Posted by MilesStandish on Tue, 25 Feb 2020 22:41:25 -0800

Rabbitmq introduction and deployment cluster

Blog Outline:1, MQ introduction2, What is RabbitMQ?3, Installing RabbitMQ4, Deploy Rabbitmq cluster1) Deployment environment2) Install rabbitmq service3) Configure the host file and add the above two nodes to the cluster4) rabbitmq01 configure the cluster and add rabbitmq02 and 03 to the 01 cluster5) Accessing the web interface6) Add vhost to ...

Posted by brij_theinvader on Tue, 25 Feb 2020 22:24:35 -0800

Analysis of IO format controlled by controller in C + +

background For the package from C language to C + +, the format control of output stream is a headache. Is the string format control of printf not good? Indeed, many C + + open-source libraries have implemented the format control of printf. Function signature is similar to format (const STD:: String & ...

Posted by Markto on Tue, 25 Feb 2020 21:29:25 -0800

[Python - OpenCV] project practice - pose estimation

Directory outline Theoretical framework Basic knowledge summary: API detailed explanation: Basic outline 1. Affine transformation and perspective transformation 2. The definition of image coordinate system, camera coordinate system and world coordinate system, and the transformation relationship a ...

Posted by freeak08 on Tue, 25 Feb 2020 21:14:30 -0800

Building a c + + environment for vscode development based on MinGW-w64 on win7 platform

1, Install plug-ins for vscode and cc + + 2, Install and configure MinGW-w64 1. Download and install Download MinGW-w64 After downloading, install. During installation, you can customize or default the installation directory. Options to be set during installation: Version: GCC version, select the ...

Posted by overlordhu on Tue, 25 Feb 2020 21:12:39 -0800

Blue Bridge Cup title - newspaper pages / coal balls / square circles / printing squares / calculation formula

1, Pages of newspaper Planet X is the same as our earth's City Morning Post, It's just a bunch of individual pieces of paper. Each paper is printed with 4 editions. For example, a newspaper contains four pages: 5, 6, 11, 12, You can be sure that it should be the top 2 newspaper. We found a newspaper o ...

Posted by AnarKy on Tue, 25 Feb 2020 20:34:50 -0800

Extremum of convex polygon

Preface In computational geometry, we often need to find the extreme point of a 2D Polygon. For example, through the extreme point of x\y, we can define the bounding box of a polygon. More generally, we may need to find the extreme point of a polygon in any direction. For the point set of n points, ...

Posted by seanpaulcail on Tue, 25 Feb 2020 20:25:22 -0800