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com – Page 2 – SyntaxBug

C language data structure-time complexity and space complexity

1. What are time complexity and space complexity? 1.1 Algorithm efficiency Algorithm efficiency analysis is divided into two types: the first is time efficiency, and the second is space efficiency. Time efficiency is called time complexity, while space efficiency is called space complexity. Time complexity mainly measures the running speed of an algorithm, while space […]

mysq, comprehensive query of database

Record the comprehensive query of the database and review it to deepen your impression Creating a teaching database contains four basic tables: Teacher status table Teacher (Tno teacher number, TName teacher name, TDept teacher’s department); Basic course table Course (Cno course number, Cname course name, cpno prerequisite course number, Tno teacher number); Student status table […]

Summary of all aspects of getting started with SpringCloud Alibaba components (Part 1): registration center-nacos, load balancing-ribbon, remote calling-feign

Article directory Nacos Ribbon Feign FeignExpansion Nacos Concept: Nacos is a new open source project launched by Alibaba. It is a dynamic service discovery, configuration management and service management platform that makes it easier to build cloud native applications. Nacos is committed to helping users discover, configure and manage microservices. It provides a simple and […]

SpringBoot: SpEL makes complex permission control easy!

The path to growth as a programmer Internet/Programmer/Technology/Data Sharing focus on This article should take approximately 6 minutes to read. From: juejin.cn/post/7226674759626571833 1 Introduction 2 SpEL expression 3 Let’s do it Custom annotations Define aspects 4 Permission verification First, introduce SpEL: Then, get the expression we need from the annotation. Expression parsing Custom parsing method […]

Learn CompletableFuture: Keep your code from blocking!

This is a community that may be useful to you One-to-one communication/interview brochure/resume optimization/job search questions, welcome to join the “Yudao Rapid Development Platform” Knowledge Planet. The following is some information provided by Planet: “Project Practice (Video)”: Learn from books, “practice” from past events “Internet High Frequency Interview Questions”: Studying with your resume, spring blossoms […]

When installing Bitcoin in Ubuntu, a make compilation error occurs or there is no such file when running ./configure –with-incompatible-bdb.

If you install Bitcoin by installing dependencies and get a make compilation error or run ./configure –with-incompatible-bdb and it shows that there is no such file, you can try my method. Reference: http://t.csdnimg.cn/bMdRc If you install this document, you will not be able to verify the path of the Bitcoin file, so you need to […]

Vue black notepad component version

Rendering functions: 1. Provide data: Provide it in the public parent component App.vue 2. Pass data to TodoMain through parent to child. 3. Use v-for rendering Added features: 1. Collect form data v-model 2. Listen for events (enter + click to add) 3. Pass the task name to the parent component App.vue 4. Add unshift […]

Java GUI programming completes arithmetic test

1. Question requirements Write a small arithmetic test software to train primary school students’ arithmetic ability. The program consists of3classes, of which The Teacherclass object is responsible for giving arithmetic questions and judging whether the answer of the respondent is correct:ComputerFrameTheGUIinterface provided by the class object sees the question and passes it TheGUIinterface gives answers […]

Spring Boot implements various parameter verifications. It is so well written. It is recommended to collect it!

Hello everyone, I am a passerby~~~ Click on the card below to follow me, java dry goods will be delivered in time I have written an article about the use of Spring Validation before, but I still feel that I am superficial. This time I plan to thoroughly understand Spring Validation. This article will introduce […]