IT Log

Record various IT issues and difficulties.

Category: Code


  • Setting Up Spring Cloud Project

    Contents Project Setup Build Parent-Child Projects Create Parent Project Spring Cloud Version Create Child Project – Order Service Declare Project Dependencies and Build Plugins Create Child Project-Product Service Declare Project Dependencies and Build Plugins Project Setup Since the application has been split into microservices, multiple projects need to be created. However, IDEA can only have…


  • AI Tool wiseflow: The Ultimate Web Crawler, Harvesting Industry Insights at Lightning Speed

    Chief Intelligence Officer (Wiseflow) Official Statement: We don’t lack information; what we need is to filter out the noise from the vast amount of data so that valuable information can be revealed. Those of you must have heard about this open-source tool from Wiseflow lately. Today, let’s proceed with the actual installation and document any…


  • “An In-depth Analysis of Spring Core Technology [Extremely Practical Edition] – VIII: Comprehensive Explanation of the Spring Data Access Module and Spring-Tx Module”

    Transaction management is a crucial means to ensure data consistency and integrity in enterprise-level development. As a widely used framework in the Java ecosystem, Spring’s transaction management module (Spring-Tx) not only provides powerful features but also significantly simplifies developers’ work when handling transactions across different technology stacks. Whether it be programmatic transactions or declarative transactions,…


  • DeepSeek Versions Overview and Strengths & Weaknesses Analysis

    Analysis of DeepSeek Versions and Their Strengths and Weaknesses DeepSeek is a language model series that has recently garnered significant attention in the field of artificial intelligence. Throughout its various version releases, it has progressively enhanced its ability to handle multiple tasks. This article will provide an in-depth introduction to DeepSeek’s versions, covering their release…


  • What is the role of block elements in web front-end

    Block elements play a crucial role in web front-end development by structuring the layout and organizing content effectively. Here’s how they contribute: Creating Separate Blocks: Block elements, such as <div>, <p>, and <h1>, create distinct sections within the webpage, each starting on a new line. Structuring Content: They help in logically dividing the page into…


  • js schedule code

    To create a scheduled task in JavaScript, particularly using Node.js, you can utilize the node-schedule package for basic scheduling and more advanced requirements like job persistence. Here’s how you can implement it: Step-by-Step Solution: Install the Package: npm install node-schedule Basic Interval Scheduling: Schedule a task to run every 5 minutes. “` var schedule =…


  • How to Handle 302 Redirects in Vue Front-End Requests

    To handle 302 redirects in your Vue.js frontend requests, you can leverage the Axios HTTP client, which automatically manages redirects by default. Here’s a concise solution: Install and Import Axios: npm install axios Then import it into your Vue component. Use Axios for API Calls: Send your requests using Axios, which will handle 302 redirects…


  • What is the front-end controller in Spring MVC

    In Spring MVC, the Frontend Controller pattern is encapsulated by the DispatcherServlet, which acts as the central hub for handling all incoming HTTP requests. This servlet is responsible for coordinating the flow of web requests and responses, managing tasks such as routing, logging, security checks, and dispatching requests to appropriate handlers. By centralizing these responsibilities,…


  • “How to Connect Backend, Frontend, and Database in Python”

    To connect the backend, frontend, and database in Python, follow these steps: Choose a Backend Framework: Use Flask or Django for the backend. For simplicity, start with Flask. Set Up the Database: Select SQLite or MySQL. Use an ORM like SQLAlchemy to interact with the database. Configure the Backend: Integrate Flask with your database using…


  • Frontend-Backend Separation: How to Display the Username

    To display the username after separating frontend and backend, follow these steps: Store Username in State: Use React’s useState to manage the username state on the frontend. Fetch Username from Backend: Create an API endpoint (e.g., /api/users/me) that returns the logged-in user’s data. Use Axios or fetch to call this endpoint in a function, updating…


  • How to Answer the Project Highlights in a Front-end Interview

    When preparing for a front-end interview, highlighting the key achievements and innovative aspects of your projects is crucial to showcasing your skills. Here’s how you can effectively present your project highlights: Identify Key Contributions: Reflect on your past projects to pinpoint specific contributions where you excelled or introduced something unique. For example, implementing a responsive…


  • Reusable Vue instances are called

    To create reusable Vue components, follow these steps: Create Component Files: Each component should be a separate .vue file with template, script, and style sections. Define Props: Use props to pass data from parent to child components for customization. Style Scoping: Utilize scoped styles to ensure CSS is contained within the component. Import Components: In…


  • NPM Package Front-End Project Configuration Parameters

    NPM Package Front-End Project Configuration Parameters When setting up a front-end project using NPM, it’s crucial to configure the package.json file correctly. This file contains metadata and dependencies for your project. Here are some key configurations you should consider: Package Metadata: Include fields like name, version, description, author, and license. These provide essential information about…


  • Front-end sends a JSON array; the back-end receives it via what method

    Front-end sends a JSON array; the back-end receives it via the POST method using Express.js. Answer: When the front-end sends a JSON array, the back-end typically receives it via the POST HTTP method. The data is accessed in Express.js through req.body after parsing with middleware like express.json(). Here’s a concise example: const express = require(‘express’);…


  • Is Quick App a front-end framework

    Quick App is not a traditional frontend framework like React or Angular. Instead, it is a tool specifically designed by Huawei to optimize app performance and efficiency for their devices. While it may provide some UI components, its primary focus is on creating lightweight applications tailored for the Huawei ecosystem, rather than serving as a…


  • The reason why front-end pages and prototypes with the same 16-bit color look inconsistent

    The inconsistency in the appearance of front-end pages and prototypes using 16-bit color can be attributed to several factors. Here is a step-by-step explanation: Color Space Differences: Prototypes might use a different color space or profile compared to the web browser. Design tools often manage colors internally, which may not translate directly to how browsers…


  • Interesting JS Code

    The JavaScript code snippet defines a function fun that generates an array of objects, each with properties title, description, and value. The titles are letters from “A” to “I”, the descriptions repeat “Interesting JS Code”, and the values increment from 1 to 9. The function then maps this array and logs it. Here’s a breakdown:…


  • Front-end font adaptation across different screens

    To ensure your website’s fonts adapt well across various devices, follow these organized steps: Use Responsive Units: Opt for relative units like em or rem instead of fixed pixels. This allows font sizes to scale with the user’s default settings. Media Queries for Different Devices: Target smaller screens using max-width in media queries. Adjust font…


  • “How to Let Vue Know When the Page Has Been Loaded”

    To make Vue aware of when a page has loaded, you can use either window.addEventListener(‘DOMContentLoaded’) or window.onload. Here’s how to implement it: Using DOMContentLoaded: if (typeof window !== ‘undefined’) { window.addEventListener(‘DOMContentLoaded’, () => { // Page is ready; initialize Vue here new Vue({ // your options }); }); } Using window.onload: if (typeof window !==…


  • Frontend development has some interesting aspects

    Frontend development is indeed a fascinating field with numerous interesting aspects. Let me walk you through some of the key areas that make frontend development both challenging and rewarding. 1. User Interface (UI) and User Experience (UX): Why it matters: UI/UX design is all about creating interfaces that are not only visually appealing but also…


  • What problems are solvable by both front-end and back-end development areas

    Problems solvable by both front-end and back-end development areas often involve a seamless integration of user interface (UI) and server-side processing. Here’s an organized overview of such problems: User Interaction & Data Processing: Form Submission: Frontend collects input, backend processes data. Authentication: Frontend handles login forms; backend manages accounts and security. Real-Time Features: Chat applications…


  • How to Implement the Frontend Part in Frontend-Backend Separation

    To implement the frontend part in a front-end and back-end separation structure, follow these organized steps: 1. Project Initialization Choose Frontend Framework: Select a framework like Vue.js for familiarity and efficiency. Select Backend Technology: Opt for Node.js with Express.js or another suitable backend language/framework. 2. Design Frontend-Backend Interaction Define API Endpoints: Establish clear endpoints for…


  • What Technology Can Quickly Implement CRUD Operations in Front-End Development

    To efficiently implement CRUD operations in front-end development, consider the following approach: Frontend Frameworks: Use React.js or Vue.js for building user interfaces due to their popularity and component-based architecture. State Management: Utilize Redux (with Thunk for asynchronous actions) or the Context API in React to manage application state effectively, which is crucial for CRUD operations.…


  • The Articulations of the Anterior Ends of the Twelve Ribs

    The anterior ends of the twelve ribs articulate in distinct ways based on their pair number: Ribs 1-7 (True Ribs): These pairs directly articulate with the sternum through their own costal cartilages, known as sternal ends. Ribs 8-10 (False Ribs): Their anterior ends connect via costal cartilage to the preceding rib. For example: Rib 8…


  • “How to Solve the Issue of the First Item Not Being Selectable in a Mobile Dropdown List Using JavaScript”

    To resolve the issue where the first item in a mobile dropdown isn’t selectable using JavaScript, follow these steps: Check HTML Structure: Ensure all <option> elements are correctly nested within the <select> element and have valid value attributes. Inspect CSS Styling: Remove any styles that might hide or disable the first option. Look for conflicting…


  • “How to Optimize a Front-End Tree with Tens of Thousands of Data Entries”

    To optimize a front-end tree with tens of thousands of data entries, follow these structured steps: Rendering Optimization: Virtualization: Implement virtualized lists using libraries like React’s VirtualList or similar tools to render only visible nodes, reducing DOM manipulation and improving performance. Lazy Loading: Fetch child nodes on-demand when expanding a parent node to reduce initial…


  • “How to display data retrieved from the backend in Spring Boot frontend”

    To display data retrieved from the backend in a Spring Boot frontend, you can use either Thymeleaf for server-side rendering or fetch data via AJAX calls to REST APIs. Here’s how to implement both approaches: Method 1: Using Thymeleaf Template Engine Step 1: Add Thymeleaf Dependency Add the Thymeleaf starter dependency to your build.gradle file:…


  • How to Return Values from RabbitMQ Consumer Business to Frontend

    To return values from a RabbitMQ consumer to the frontend, you can use an HTTP endpoint and a database or Redis cache: Set Up Database/Redis: Store task details including ID, status (e.g., processing, completed, error), result, and timestamps. Modify Consumer: When receiving a message, extract the task ID. Process the task, then update the database/Redis…


  • How to create long images for horizontal screens in frontend

    Creating long images for horizontal screens in frontend development involves several steps to ensure proper rendering and user experience. Here’s a comprehensive guide: Image Dimensions: Set the image width to 100% or a fixed pixel value to make it responsive. Use height: 100vh or a percentage of viewport height for longer images. CSS Layout: .horizontal-image-container…


  • “When Frontend and Backend Are Not Separated: What Does the Frontend Do”

    When the frontend and backend are not separated, the frontend handles a broader range of responsibilities compared to a typical separation scenario. Here’s an organized breakdown of what the frontend does in such cases: User Interface (UI) Development: The frontend is responsible for designing and implementing the visual layout of web pages, ensuring they look…