Programmer Group

Destructor GitHub address Introduction: disruptor is an open source and efficient concurrent framework event: event Event factory: eventFactory The concrete implementation of event handling: eventHandler Producer In order to use disruptor, let's consider a simple example, which is to say = pass a long t ...

What is flow operation The Java 8 API adds a new abstraction called streaming Stream, which allows you to process data in a declarative way. Stream provides a high-level abstraction of Java set operations and expressions in an intuitive way similar to querying data from a database using SQL statements. Stream API can greatly improve ...

Original address Summary Before starting this article, the blogger defaults that you already know Spring Boot, Spring Security, Vue and JWT. The above concepts will not be repeated here. Let's talk about the train of thought. 1. The backend needs to write JWT generation processing and JWT parsing authentication processing. 2. The front ...

Document deletion for Solr, 200114-SpringBoot series tutorial The previous Search tutorial did not continue at the beginning, and now it is picked up again, at least to complete the basic operation posture of CURD; this article focuses on how to delete data <!-- more --> I. Configuration Before introducing demo, you need to install sol ...

variable In the file hello_world.py,.Py is the suffix of the python file and is therefore parsed using the Python interpreter. $ cat hello_world.py print("Hello Python world!") Now change to variable form, message is variable, and each variable is associated with a value: message = "Hello Python worl ...

In the process of writing our call later, we will face from coupling. Cohesion and maintainability, scalability, reusability, flexibility and other challenges, design patterns to make the program have better: Code reusability (i.e. code with the same function, not written many times) Readability (i.e. ...

Common functions of Numpy 1. Read matrix file xxx,xxx,xxx,xxx xxx,xxx,xxx,xxx xxx,xxx,xxx,xxx It consists of data items in several rows and columns. The number of items in each row must be equal, the type of data items in each column must be the same, and there is a clear separator between data ...

Course design of data structure user management system Things involved: MFC, file, AVL; As a beginner, record the course design of this semester's data structure; first, the requirements of the task book. 1. [problem description]: When logging in the server system, you need to verify the user name an ...

Background We may often transform data between DO, Model, VO layer data: Entity corresponds to the data structure of persistence layer (generally the mapping model of database table); The Model corresponds to the data structure of the business layer; VO is the data structure that the Controller interacts with the client. For example ...

iOS underlying learning-day-16 Preface - OC grammar problem runtime API-01 class Dictionary to model example runtime API-04 method replacement Preface - OC grammar I am an iOS developer. I am a rookie at the bottom of iOS for 30 days. problem What is Runtime? Has it ever been used in normal ...