Daily review notes to master COMP1531 concepts 每日复习笔记，掌握 COMP1531 核心概念
Welcome to the COMP1531 Final Review Hub! This is your comprehensive collection of daily review materials, each focusing on critical exam topics. Each day covers a specific concept with detailed notes, code examples, and practice quizzes to help you prepare for your final exam. 欢迎来到 COMP1531 期末复习中心！这是您的每日复习资料综合集合， 每天专注于关键考试主题。每一天都涵盖特定概念，包含详细笔记、代码示例 和练习测验，帮助您为期末考试做准备。
Essential methods you must master: arr.length, arr[i], push(), includes(), slice(), filter(), split(), and join(). Includes visual diagrams for easy understanding. 必须掌握的核心方法：arr.length、arr[i]、push()、includes()、 slice()、filter()、split() 和 join()。包含可视化图表辅助理解。
Master Express.js routing: req.body for POST data, req.params for URL path variables, req.query for query strings. Learn HTTP status codes (200/400/404), error handling patterns, and connecting backend logic to API endpoints. 掌握 Express.js 路由：用 req.body 获取 POST 数据、req.params 获取路径变量、 req.query 获取查询参数。学习 HTTP 状态码（200/400/404）、错误处理模式 以及将后端逻辑连接到 API 端点。
Master Data Persistence (JSON/fs), Logic Implementation (Sets/Enums), String Processing (Regex/Split), and 100% Test Coverage with Jest. Includes "Memory Game" and "Court Objections" deep dives. 掌握数据持久化 (JSON/fs)、逻辑实现 (Set/Enum)、 字符串处理 (正则/切割) 以及 Jest 100% 测试覆盖率。 包含“记忆游戏”和“法庭异议”深度解析。
Deep dive into Async Timers in Express, avoiding server crashes, API Versioning strategies, and a full structural analysis of the Evanweb project. Includes 40+ Quiz Questions! 深入探讨 Express 中的异步定时器、避免服务器崩溃、 API 版本控制策略以及 Evanweb 项目的完整架构分析。 包含 40+ 题测验！
Master SDLC, Git workflows, npm, verification methods, HTTP, coding principles (KISS/DRY/YAGNI/SOLID), and JavaScript first-class & higher-order functions. Includes 15 Quiz Questions! 掌握 SDLC、Git 工作流、npm、验证方法、HTTP、编码原则（KISS/DRY/YAGNI/SOLID） 以及 JavaScript 一等函数和高阶函数。包含 15 题测验！
Master the 5-Step Problem-Solving Method, Question Type Classification (Pure Function, REST API, Business Logic), HTTP Status Codes (200/400/401/403/404/500), and exam tips. Includes 30 Quiz Questions! 掌握5步解题法、题型分类（纯函数、REST API、业务逻辑）、 HTTP状态码（200/400/401/403/404/500）及考试技巧。包含 30 题测验！
Final exam preparation strategies, common mistakes to avoid, time management tips, and comprehensive concept review. 期末考试备考策略、常见错误避免、 时间管理技巧以及全面概念复习。