Programmer Think

1, Function 1. Function creation and call What is a function A function is a piece of code that performs a specific task and completes a specific function Why do I need a function Reuse code Hide implementation details Improve maintainability Improve readability and facilitate debugging Function creation def Function name([input parameter ...

1, Introduction In 1974, the French engineer J.Morlet first proposed the concept of wavelet transform. In 1986, the famous mathematician Y.Meyer accidentally constructed a real wavelet base and established the multi-scale analysis of constructing wavelet base in cooperation with S.Mallat. Wavelet analysis began to flourish. Wavelet analysis ha ...

1, Applet cloud development Cloud development of applications: Developers can use cloud development to develop wechat applets and games. They can use cloud capabilities without building a server. Cloud development provides developers with complete native cloud support and wechat service support, weakens the concept of back-end and operation ...

Learning Mybatis framework (persistence layer framework) - Introduction 1.1.1 what is a framework Framework is the redesign of the whole or part of the system, which is expressed as a method of interaction between a group of abstract component instances; Another definition holds that a framework is an application skeleton that can be customiz ...

Introduction and optimization process of simple second kill system windows native hardware configuration: 8-core 32G linux server hardware configuration: 2-core 4G Foreword, the optimized simple second kill system does not involve distribution, so naturally there are no technical points such as master-slave replication. Here, we should a ...

Analysis of errors in AFIO clock AFIO misunderstanding We generally misunderstand it as "enabling the multiplexing function of the IO port requires enabling the AFIO clock", but let's recall the structure diagram of GPIO and learn more about GPIOx_Pin structure:   In the figure above, the signal from the port pin enters the mult ...

I Microservices 1. Single architecture and distributed architecture Monomer architectureDistributed architecture The system is split according to business functions, and each business module is developed as an independent project to become a service advantage: Disadvantages: the strength of service splitting, how to maintain the address of se ...

Because the programming idea is different from the design mode of database, some ORM frameworks have been born. The core is to turn relational database and data into object-oriented. Hibernate and myBatis are currently popular solutions. Both have their own advantages and disadvantages. The competition is fierce, and one of the more important c ...

Chapter VI dictionary 6.1 a simple dictionary Let's look at a game containing aliens. These aliens have different colors and scores. Here is a simple dictionary that stores information about specific Aliens: alien_0 = {'color':'green','points':5} print(alien_0['color']) print(alien_0['points']) Dictionary alien_0 stores alien colors a ...

1.1 installation of Sentinel console stay https://github.com/alibaba/Sentinel/releases Download the jar package of the console from the page and put it in a folder on the server Start the console program with the following command, - dserver Port specifies that the port is 9010. If there is a port conflict, you can specify another port java ...