Question material: Query requirements: 3. Query all records in the student table 4. Query the 2nd to 4th records of the student table 5. Query the student number (id), name (name) and department (department) information of all students from the student table 6. Query information about students in the Computer Department and English Department from […]
Android12 source code compilation error ninja: build stopped: subcommand failed. Solution
1. Background description Virtual machine: wsl 2.0 Ubuntu18.04 Virtual machine configuration: 8G memory, 1T storage Software version: The current highest version of the Android system is Android S, which is the Android 12 beta version source code without any modifications. Error content: When compiling to 54%, ninja compilation was interrupted, ninja: build stopped: subcommand failed. […]
Coduck(KDY)CSP-X semi-final simulation competition 3 Gao Guoming’s supplementary questions 2023.10.11
1. Question report: (The following are the scores after supplementary questions) (1) Score: T1: [Late]: 100 T2: [Climb the ladder]: 100 T3: [Hamster Queue]: 100 T4: [square matrix]: 100 Total score: 400/400 (2) Question analysis: 1.No.1 Late: Title description The entire map can be viewed as a one-dimensional number axis. The coordinates of Xiaoke’s home […]
vue partially uses vue-quill-editor rich text editor
1. Install vue-quill-editor npm install vue-quill-editor -save 2. Introduce a rich text editor locally into the component <script> //Rich text editor import ‘quill/dist/quill.core.css’ import ‘quill/dist/quill.snow.css’ import ‘quill/dist/quill.bubble.css’ import {<!– –> Quill, quillEditor } from “vue-quill-editor”; export default {<!– –> data(){<!– –> return {<!– –> content:”, } } components: {<!– –>quillEditor}, } </script> 3. HTML <!–Rich […]
Qt file directory operations QDir, QFile, QTemporaryDir/File, QTextStream, QDataStream, QSettings, QFileInfo, QFileSystemWatch
Abstract: This Qt blog post mainly introduces which classes can be used when processing file directory operations in Qt development, what are the functions of these classes, how to use them roughly, common class methods of classes and related matters that need to be paid attention to. Wait, for more details, you need to search […]
Analysis of the core principles of state synchronization in online game development
State synchronization is a server/client synchronization technology that must be mastered in online games. What is state synchronization, and how is it implemented in the game? With these questions in mind, this article will give you a detailed analysis of state synchronization from the following three aspects. What kind of games should use status synchronization […]
Design and implementation of college classmate registration website based on Java (source code + lw + deployment documents + explanation, etc.)
Blogger Introduction: ?300,000+ fans across the entire network, csdn guest author, blog expert, CSDN Rising Star Program mentor, high-quality creator in the Java field, Blog Star, Nuggets / Huawei Cloud / Alibaba Cloud / InfoQ and other platforms are high-quality authors, focusing on the field of Java technology and practical graduation projects? Contact for source […]
Solving TypeError: only size-1 arrays can be converted to Python scalars
Table of Contents Solving TypeError: only size-1 arrays can be converted to Python scalars Error example Error analysis Solution Method 1: Use flatten() Method 2: Use ravel() in conclusion Solving TypeError: only size-1 arrays can be converted to Python scalars In Python, when we try to operate on an array as a scalar, we sometimes […]
Android uses CameraX to implement operations such as previewing/photography/recording video/image analysis/focusing/zooming/switching cameras.
1. CameraX architecture See official documentation CameraX architecture There is the following passage Using CameraX, you interact with your device’s camera with the help of abstract concepts called “use cases.” Preview: Accepts a Surface used to display previews, such as PreviewView Image Analysis : Provides a CPU-accessible buffer for analysis (e.g. machine learning) Picture Capture […]
Let’s play with JSX in Vue: let you master its features at once!
Click on the front-end Q above and follow the public account Reply to join the group and join the front-end Q technology exchange group Introduction to JSX JSX is a syntax extension of Javascript, which has all the functions of Javascript while having the semantics and intuitiveness of html. It allows us to write template […]