Programmer Group

Remember the best code I've ever written for this vegetable chicken. The purpose is to write a configuration file saving module to save some configurations that need to be saved in the project. Because the data to be saved is scattered in many modules. I have thought about building a large structure, and then put all the data to be saved into ...

1. Prometheus installation 1.1 main components Prometheus server: the main service, which accepts external http requests, collects, stores and queries data, etcPrometheus targets: statically collected target service dataService discovery: dynamic discovery of servicesPrometheus alerting: alarm notificationPush gateway: data collection proxy s ...

1, Circulation 1.1 cycle Now I have a problem: the program reads in a positive integer with less than 4 bits (including 4 bits), and then outputs the number of bits of this integer. If input 352, output 3. People's way: you can see it with your eyes. We can see that 352 is a three digit number at a glance. The way of computer: what the ...

Producer principle Producer overview         The party sending the message is called the producer. His role in the entire RocketMQ production and consumption system is shown in the figure:         Producer group: a logical concept. When using producer instances, you need to specify a group name. A ...

brief introduction In programming, we often need to perform the same or similar operations. These operations are completed by a piece of code, and the emergence of functions can help us avoid writing this piece of code repeatedly. The function is to abstract a relatively independent function and make it an independent entity. One reason why Py ...

catalogue 1: Template function one point one   General template function 1.2 specialized template function   2: Template class 2.1 formwork 2.2 member template function 2.3 formwork specialization 2.3.1 template member function specialization 2.3.2 template specialization 3: Template class AutoPtr   1: Template ...

Spring has defined org.springframework.cache.Cache and   org.springframework.cache.CacheManager interface to unify different caching technologies; And support the use of   JSR-107   Annotations simplify our development; Provides implementations that support multiple caches. There are two main interfaces: org.springframework. ...

1 Preface Recently, bloggers are doing some projects to adapt freeRTOS. In short, they are migrating from other RTOS platforms to freeRTOS platform. Since the previous codes are available, based on experience, we think that we only need to re encapsulate the interface of OSAL, and the upper logic should not be a problem in theory; But wh ...

How to check the mean square error to judge whether the prediction result is correct? (case: linear regression, random forest California house price data set) Why use the mean square error? Can't the previous accuracy? Because the results of regression model are continuous variables, it is impossible to judge directly by right or wrong. Howev ...

1, Construction project In our daily projects, we usually have a multi-layer architecture. The domain layer (entity) is generally not placed together with the application layer (business: such as api and mvc). We only do this when doing exercises. Then I will directly share the most practical and layer according to the most basic project objec ...