Daniel Scott
13 posts
状态模式深度指南:构建可动态切换行为的艺术
状态模式深度指南:构建可动态切换行为的艺术 概述 状态模式(State Pattern)是一种行为型设计模式,它允许对象在内部状态改变时改变其行为。看起来对象似乎修改了其类。这种模式是解决复杂状态转换逻辑的利器,特别适合用于工作流引擎、游戏开发、订单处理系统等场景。 核心概念 状态模式的核心思想是:将每个状态封装为独立的类,对象的行为取决于其当前状态,而状态之间的转换由状态类自己管理。 关键角色 Context(上下文):维护当前状态的实例,负责将请求委托给状态对象处理 State(抽象状态):定义所有具体状态的共同接口 ConcreteState(具体状态):实现各个具体状态的行为,并负责状态转换 为什么需要状态模式? 传统方式的困境 想象一个订单系统,订单有多种状态:待支付、待发货、已发货、已完成、已取消。每个状态下可以执行不同的操作。 // 传统的if-else方式 class Order {…
htop for Your Git History
You clone a repo you’ve never seen before and you want to understand it. Not the code, not…
5 Ways to Find High-Impact Ruby and Rails Projects to Contribute to Today
The Ruby community has always been known for its friendliness and “MINASWAN” (Matz Is Nice And So We…
How to Build Fillable PDF Forms in .NET — Without Fighting the PDF Beast
Create fully fillable PDF forms in .NET with the List & Label software component — fast, simple, and…
Build a Stunning 3D City Model with GISBox!
3D models are an essential tool in the fields of urban planning, architectural design and geographic information management.…
14 Key Project Management Principles & How to Use Them
Project management is a highly complex field. There are many things that a project manager must understand to…
Technical Report: Initial Data Analysis of Titanic Datasets
Overview The provided datasets consist of two files: train.csv and test.csv. These datasets contain information about passengers on…
Have You Settled for “Good Enough” in Your Career?
Have you ever found yourself settling for less than you deserved in your career? How did you overcome…
7 API ON NODE.JS
I tried to create a 7 api on node.js to learn it out. 1.TO-DO LIST I created a…
What Does a Building Inspection Cover? (Checklist Included)
Construction projects must adhere to many codes and regulations. While some regulations are federal, many change depending on…