Programmer Think

Implementation principles of nine cross domain methods (full version) preface Cross domain requests are often encountered in front and back-end data interaction. What is cross domain and what kinds of cross domain methods are there, which is the content of this paper. For the complete source code of this article, please stamp the GitHub blog. ...

1. Retry of sequential messages For sequential messages, when the consumer fails to consume the message, the message queue RocketMQ will automatically retry the message continuously (with an interval of 1 second). At this time, the application will be blocked in message consumption. Therefore, when using sequential messages, it is important to ...

1, Introduction 1 overview of genetic algorithm Genetic Algorithm (GA) is a part of evolutionary computation. It is a computational model that simulates the biological evolution process of Darwin's genetic selection and natural elimination. It is a method to search the optimal solution by simulating the natural evolution process. The algorithm ...

preface: This article is for python beginners to learn by themselves. In the future, it should be updated every weekend. Because I am also learning python by myself, I want to share a wave of notes. You can pay attention if you like. Text: Next, we talked about tuples and dictionaries in this chapter. The three of them (list, tuple and Dictiona ...

1. Introduction to fastdfs FastDFS is an open source distributed file system. It manages files. Its functions include file storage, file synchronization and file synchronization Access (file upload, file download) and so on, which solves the problems of mass storage and load balancing. It is especially suitable for online service with doc ...

  1. OA system procurement approval requirements Procurement approval project of school OA system (procurement of teaching equipment by purchasers): the demand is If the amount is less than or equal to 5000, it shall be approved by the teaching Director (0 < = x < = 5000)If the amount is less than or equal to 10000, it shall be appr ...

    Installation of JD K1 eight I installed it directly through the following command: 1: Run the yum install command and wait for the installation yum install -y java-1.8.0-openjdk-devel.x86_64 2: Check whether the installation is successful Installing Rabbitmq 1: Enter the official website to view the version content 2: Go to git ...

There are two commands for MATLAB to realize image decomposition and reconstruction: The first is one-layer wavelet decomposition dwt2 [CA,CH,CV,CD]=dwt2(X,'wname'); Where dwt2 represents discrete wavelet transform; X is the input parameter and is the image; ' wname 'is the name of wavelet; The output variable CA is the low-frequency decompo ...

Hi, new classmate. I'm glad you've finally pursued this problem. Maybe you're feeling confused. Various gods have different understanding of the collaborative process. Some say it's a threaded framework, while others say it's lighter than threads. I hope my blog can help you understand the collaborative process from another perspective. Please ...

Annotation function integration So far, there are a few customized annotations on the entry class of each micro service module, such as the entry class of Elsa server demo module: @EnableDiscoveryClient @SpringBootApplication @EnableGlobalMethodSecurity(prePostEnabled = true) //Annotation indicating permission to open Spring Cloud Security @E ...