00-Introduce Design Patterns

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外文翻译----室内设计风格

外文翻译----室内设计风格

外文翻译----室内设计风格with a nod to the past。

This style is perfect for those who want a fun and playful vibe in their home。

Think geometric shapes。

pop art。

and vintage furniture.XXX。

This style is perfect for those who want a clean and clutter-free space。

Think neutral colors。

clean lines。

XXX.nal XXX。

This style is perfect for those who love XXX furniture。

intricate patterns。

and warm colors.Industrial XXX。

This style is perfect for those who want a modern and edgy vibe in their home。

Think exposed brick。

metal accents。

and raw materials.XXX r design is all about free-XXX style。

This style is perfect for those who want a cozy and relaxed atmosphere in their home。

Think vibrant colors。

mixed patterns。

and plenty of plants.No matter what style you choose。

make sure it XXX.XXX journey。

it'XXX this process。

you'll begin to develop a sense of your personal preferences and what designs you're XXX styles。

Head First Design Patterns(深入浅出设计模式)-设计模式介绍

Head First Design Patterns(深入浅出设计模式)-设计模式介绍

Head First Design Patterns(深入浅出设计模式)-设计模式介绍1.Welcome to Design Patterns -设计模式介绍现在我们要住进对象村(Objectville),我们刚刚开始接触设计模式…每个人都在使用它们。

一会我们将去参加Jim和Betty的星期三晚上的模式聚会!有人已经解决了你的问题。

在这章里,你将学习到为什么(和怎么样),你将学习到那些幸存下来的开发者的智慧和教训,他们都曾经历过类似的设计问题。

在我们做之前,我们将先看看设计模式的用途和好处,再看一些关键的面向对象设计原则,并且再通过一个实例了解模式的工作方式。

使用模式最好的方法就是把它们装入脑袋里,然后在你设计和现有的应用程序里找到你能够应用它们的地方。

相对于代码重用,使用模式你获得了经验的重用。

-1-从一个简单的模拟鸭子程序开始乔为一个制造非常成功的模拟鸭子池塘游戏(SimUDuck)的公司工作。

这个游戏可以展示很多种鸭子的游泳方式和呷呷叫声。

系统最初的设计者们使用了标准的面向对象技术,他们创建了一个Duck基类供所有其它类型的鸭子继承。

去年,竞争者们给公司带来了越来越多的压力。

经过历时一周在高尔夫球赛场上的集体讨论,公司的经理们都觉得该是进行一次大改革的时候了。

他们需要在下周在毛伊岛举行的股东大会上展示一些真正给人深刻印象的东西。

-2-但是我们现在需要鸭子可以飞经理们确定会飞的鸭子就是模拟器需要的用来击败其他竞争者的东西。

当然,乔的经理告诉他们,对于乔来说在一周内迅速搞定这些根本不是问题。

“毕竟”,乔的上司说,“他是一个面向对象的程序员…那些有什么难的呢?”乔想:我仅仅只需要在Duck类里增加fly()方法,然后所有其他鸭子就都可以继承它了。

现在是展示我真正的面向对象才华的时候了。

-3-但是有些事情严重错误了…乔的上司:乔,我正在股东大会上。

他们刚看完演示,很多橡皮鸭子在屏幕上四处乱飞。

这是你在开玩笑吗?…发生了什么事?乔没有注意到并不是所有Duck的子类都需要fly()方法。

idea refactor用法 -回复

idea refactor用法 -回复

idea refactor用法-回复Refactoring is a technique used in software development to improve the design, structure, and readability of existing code without changing its functionality. It is an essential practice for maintaining code quality and enhancing maintainability. In this article, we will explore the concept of refactoring and delve into its application in various scenarios.1. Introduction to Refactoring (100-200 words)- Definition: Refactoring refers to the process of restructuring code to improve its internal structure without altering its external behavior.- Purpose: The primary objective of refactoring is to enhance code readability, maintainability, and extendibility.- Benefits: Refactoring helps in reducing technical debt, identifying and eliminating code smells, and promoting clean code practices.2. Key Principles of Refactoring (200-300 words)- Smaller, Focused Changes: Refactoring should be done in small steps, focusing on one specific improvement at a time.- Maintain Test Suite: Before refactoring, it is essential to have acomprehensive automated test suite to ensure the modified code remains correct.- Continuous Integration: Refactoring should be integrated into the development process to avoid accumulation of technical debt.- Preserve Behavior: Refactoring should not alter the functionality of the code; it should only improve its internal structure.3. Common Refactoring Techniques (400-500 words)- Extract Method: Breaking down a large, complex method into smaller, more manageable pieces to enhance readability and reduce duplication.- Rename: Using meaningful names for variables, methods, and classes to improve code comprehension.- Move Method: Relocating a method to a more appropriate class to improve cohesiveness and reduce dependencies.- Remove Duplication: Identifying duplicated code and extracting it into reusable functions or classes to enhance maintainability.- Replace Conditional with Polymorphism: Utilizing polymorphism to replace complex conditional statements and improve code flexibility.- Introduce Design Patterns: Applying design patterns to enhance code structure, scalability, and maintainability.4. Real-Life Example of Refactoring (400-500 words)- Select a specific codebase or project and demonstratestep-by-step refactoring processes applied to improve various aspects such as code readability, maintainability, and extensibility.- Explain the rationale behind each refactoring technique used and the resulting benefits.- Showcase how refactoring improved code quality and made it easier for future development.5. Conclusion (100-200 words)- Recap the importance of refactoring in software development.- Highlight the benefits of refactoring, including improved code readability, maintainability, and extensibility.- Emphasize that refactoring should be an ongoing process to ensure code remains clean and manageable.- Encourage developers to prioritize refactoring as an essential practice in their software development workflows.By following these steps and understanding the core concepts ofrefactoring, developers can significantly enhance the quality and maintainability of their codebases. Refactoring is a continuous process that ensures clean code practices are at the forefront of software development.。

DesignPattern

DesignPattern

创建性模式Abstract Factory(抽象工厂):对于一个系统中需要用到不同的产品家族,而在某一时刻仅用到其中的一个家族的产品时,Abstract factory是个合适的选择。

它可以提供客户端与具体产品之间的耦合,隐藏具体产品的实现细节,从而使更换产品家族变得容易。

但是有一个缺点,就是如果增加新的产品类型变得困难,因为需要修改AbstractFactory接口以及所有相关子类。

Builder(生成器):把复杂对象的创建和他的表示分离,这样同样的创建过程可以创建不同的表示。

Factory method(工厂方法):对于每一个具体的Product有一个对应的Creator来创建它。

也可一使用参数化的工厂方法来创建所有的Product而不用对每一个ConcreteProduct创建一个Creator类。

经常和动态类装入器组合在一起应用。

工厂方法和抽象工厂有一定的相似:都是通过工厂来创建Product。

但是在Abstract Factory 中有多个产品类型,并且这些产品类型之间相关。

Prototype(原型)原型和工厂的共同点和差异?应用场合:●要实例化的类是在运行时刻指定,例如动态加载●为了避免和工厂方法一样创建和产品类平行的工厂类;●一个类的实例只有几个状态。

如果使用中原型较多,最好使用原型管理器Singleton(单件)保证一个类只有一个实例,并提供一个全局访问点。

结构性模式Adapter(适配器)通过多重继承适配通过对象复合适配。

Bridge(桥接)Use the Bridge pattern when∙you want to avoid a permanent binding between an abstraction and its implementation. This might be the case, for example, when the implementation must be selected or switched at run-time.∙both the abstractions and their implementations should be extensible by subclassing. In this case, the Bridge pattern lets you combine the different abstractions and implementations andextend them independently.∙changes in the implementation of an abstraction should have no impact on clients; that is, their code should not have to berecompiled.∙(C++) you want to hide the implementation of an abstraction completely from clients. In C++ the representation of a class is visible in the class interface.∙you have a proliferation of classes as shown earlier in the first Motivation diagram. Such a class hierarchy indicates the need for splitting an object into two parts. Rumbaugh uses the term "nested generalizations" [RBP+91] to refer to such class hierarchies.∙you want to share an implementation among multiple objects (perhaps using reference counting), and this fact should be hidden from the client. A simple example is Coplien's String class [Cop92], inwhich multiple objects can share the same string representation (StringRep).Composite(组合)当表示整体部分结构并且需要嵌套结构时可以使用组合模式。

Design patterns

Design patterns

public static void main(String[] args) { int grid = 8; if(args.length > 0) grid = Integer.parseInt(args[0]); Frame f = new BoxObserver(grid); f.setSize(500, 400); f.setVisible(true); f.addWindowListener( new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); } }
The singleton
final class Singleton { private static Singleton s = new Singleton(47); private int i; private Singleton(int x) { i = x; } public static Singleton getHandle() { return s; } public int getValue() { return i; } public void setValue(int x) { i = x; } }
Enough!!!
class OCBox extends Canvas implements Observer { Observable notifier; int x, y; Color cColor = newColor(); static final Color[] colors = { Color.black, Color.blue, Color.cyan, Color.darkGray, Color.gray, Color.green, Color.lightGray, Color.magenta, Color.orange, Color.pink, Color.red, Color.white, Color.yellow }; static final Color newColor() { return colors[ (int)(Math.random() * colors.length) ]; }

设计模式ppt演示课件(96页)

设计模式ppt演示课件(96页)

Abstract Factory 当一个对象状态发生变化时,所以依赖于它的对象都将得到通知并自动刷新
解决方案(solution)
解Int决erp方re案te(r solutio提n) 供一个创建一系列相关或相互依赖对象的接口, 而无需指定它们具体的类 增加一个新的子类(被访问对象),则需要更新所有Visitor类接口
The pattern is , in short , at the same time a thing , which happens in the world , and the rule which tells us how to create that thing , a process and a thing , both a description of a thing which is alive , and a description of the process which will generate that thing .
功能增加的时候破坏了原有类的定义
可以对Delete操作进行撤销;
Builder 能对大多数功能支持Undo和Redo操作
Compositor(支持不同格式化算法的代码)
2it3e种rat设or计_b模设式为(Fir结s将t 构)一个复杂对象的创建与它的表示分离,使得同样 的创建过程可以创建不同的表示 一个支持窗口的逻辑概念,另一个描述了窗口的不同实现
使一个类的实例化延迟到其子类
23种设计模式(创建)
Prototype
用原型实例指定创建对象的种类,并通过拷贝这个 原型来创建新的对象
Singleton
保证一个类仅有一个实例,并提供一个访问它的全 局访问点
23种设计模式(结构)

Head First Design Patterns总结

Head First Design Patterns总结

Chapter 1 Intro to Design Patterns (4)It started with a simple SimUDuck app (4)But now we need the ducks to FLY (4)But something went horribly wrong... .. (4)Joe thinks about inheritance... .. (4)How about an interface? (4)What would you do if you were Joe? (5)把变化的和不变的分开处理 (5)面向接口编程而非过程 (5)面向接口编程就是面向父类类型编程 (6)HAS-A can be better than IS-A (6)The Strategy Pattern (7)Chapter 2 The Observer Pattern (7)在彼此互动的对象之间力求做到松散耦合 (8)Chapter 3 The Decorator Pattern(装饰者模式) (8)The Open-Closed Principle (9)装饰者模式的定义 (9)装饰者模式的缺点 (10)Chapter 4 the Factory Pattern (10)简单工厂模式 (11)PizzaStore工厂 (11)parallel class hierarchies (12)工厂模式的官方定义 (12)工厂模式的优点 (12)Dependency Inversion Principle (12)A few guidelines to help you follow the Principle... . (13)抽象工厂模式 (13)工厂模式和抽象工厂模式的区别 (13)Chapter 5 the Singleton Pattern (14)它有什么用? (14)可不可以用全局变量来代替单例模式? (14)它有啥优点? (14)一个简单的单例模式 (14)Singleton Pattern defined (15)多线程环境下的单例模式 (15)Chapter 6 the Command Pattern(Encapsulating Invocation) (16)the Command Pattern官方定义 (16)NoCommand (17)undo action (17)MacroCommand (17)队列需求 (18)记录需求 (18)Chapter 7 the Adapter and Facade Patterns(Being Adaptive) (19)到底什么是适配器模式? (19)Adapter Pattern defined (20)Object and class adapters (20)它俩各自的优劣 (20)Real world adapters (21)装饰者模式和适配器模式的区别 (21)The Façade Pattern (21)Facade Pattern defined (22)The Principle of Least Knowledge (22)How NOT to Win Friends and Influence Objects (22)Keeping your method calls in bounds (23)The Facade and the Principle of Least Knowledge (23)The Template Method Pattern——Encapsulating Algorithm (23)Template Method Pattern defined (24)Hooked on Template Method (24)The Hollywood Principle (24)Template Method in the Wild (25)它和策略模式的区别 (25)chapter 9 the Iterator and Composite Patterns——Well-Managed Collections (25)The Iterator Pattern (25)Adding an Iterator to DinerMenu (26)Making some improvements (26)Iterator Pattern defined (27)Single Responsibility (27)Iterators and Collections in Java5 (27)The Composite Pattern (28)如何将The Composite Pattern和Iterator Pattern合二为一? (28)Implementing the Composite Menu (29)如何将iterator融入composite pattern中? (29)The Null Iterator (29)复合模式总结 (30)Chapter 10 The State of Things——the State Pattern (30)如果把这些状态转换为代码 (31)The new design (31)The State Pattern defined (32)the State Pattern与the Strategy Pattern的区别 (32)Chapter 11 the Proxy Pattern——Controlling Object Access (32)The role of the ‘remote proxy’ (33)Java RMI (33)如何实现一个远程服务? (33)Step one: make a Remote interface (33)为啥Java中有个序列化呢? (34)The Proxy Pattern defined (34)代理模式的类图描述 (35)Get ready for Virtual Proxy (35)代理模式的共同点: (35)代理模式与装饰者模式的区别 (35)代理是怎样产生的? (35)Using the Java API’s Proxy to create a protection proxy (36)如何判断一个类是不是代理类? (36)Chapter 12 Compound Patterns——Patterns of Patterns (36)The King of Compound Patterns (37)MVC的模式组合分析? (37)MVC and the Web (37)总结: (38)Chapter 13 Better Living with Patterns——Patterns in the Real World (39)Design Pattern defined (39)Chapter 1 Intro to Design PatternsIt started with a simple SimUDuck app作者以一个鸭子游戏为例展开叙述,很普通,它也选择设计一个抽象父类Duck,该父类具有鸭子普遍具有的特征,其下有若干个鸭子子类。

好看的英文图案设计方案

好看的英文图案设计方案

Design elements and 02 technologies
Font Selection and Matching
01 02
Serif Fonts
Serif fonts are a classic choice for English pattern design schemes as they exhibit elegance and socialization Times New Roman and Baskerville are excellent examples of serif fonts that can be used
A beautiful English pattern design scheme
作者:XXX 20XX-XX-XX
目录
• Introduction • Design elements and
technologies • Design case presentation and
a • Design Summary and Outlook
English pattern design is known for its attention to detail Every element of the design, from the wallpaper to the upstory, is carefully chosen to complete the overall scheme and create a harmonious look
Sans Serif Fonts
Sans serif fonts like Helvetica and Arabic can provide a modern twist to the design scheme, making it more accessible and contemporary

DesignPattern(一)设计模式的六个基本原则

DesignPattern(一)设计模式的六个基本原则

DesignPattern(⼀)设计模式的六个基本原则使⽤设计模式的根本原因是适应变化,提⾼代码复⽤率,使软件更具有可维护性和可扩展性。

并且,在进⾏设计的时候,也需要遵循以下⼏个原则:单⼀职责原则、开放封闭原则、⾥⽒代替原则、依赖倒置原则、接⼝隔离原则、合成复⽤原则和迪⽶特法则。

下⾯就分别介绍了每种设计原则。

依赖倒置原则D I P1、官⽅定义依赖倒置原则,英⽂缩写DIP,全称Dependence Inversion Principle。

原始定义:High level modules should not depend upon low level modules. Both should depend upon abstractions. Abstractions should not depend upon details. Details should depend upon abstractions。

官⽅翻译:⾼层模块不应该依赖低层模块,两者都应该依赖其抽象;抽象不应该依赖细节,细节应该依赖抽象。

2、⾃⼰理解2.1、原理解释上⾯的定义不难理解,主要包含两次意思:1)⾼层模块不应该直接依赖于底层模块的具体实现,⽽应该依赖于底层的抽象。

换⾔之,模块间的依赖是通过抽象发⽣,实现类之间不发⽣直接的依赖关系,其依赖关系是通过接⼝或抽象类产⽣的。

2)接⼝和抽象类不应该依赖于实现类,⽽实现类依赖接⼝或抽象类。

这⼀点其实不⽤多说,很好理解,“⾯向接⼝编程”思想正是这点的最好体现。

2.2、被“倒置”的依赖相⽐传统的软件设计架构,⽐如我们常说的经典的三层架构,UI层依赖于BLL层,BLL层依赖于DAL层。

由于每⼀层都是依赖于下层的实现,这样当某⼀层的结构发⽣变化时,它的上层就不得不也要发⽣改变,⽐如我们DAL⾥⾯逻辑发⽣了变化,可能会导致BLL和UI层都随之发⽣变化,这种架构是⾮常荒谬的!好,这个时候如果我们换⼀种设计思路,⾼层模块不直接依赖低层的实现,⽽是依赖于低层模块的抽象,具体表现为我们增加⼀个IBLL层,⾥⾯定义业务逻辑的接⼝,UI层依赖于IBLL层,BLL层实现IBLL⾥⾯的接⼝,所以具体的业务逻辑则定义在BLL⾥⾯,这个时候如果我们BLL⾥⾯的逻辑发⽣变化,只要接⼝的⾏为不变,上层UI⾥⾯就不⽤发⽣任何变化。

介绍我的设计的英语作文

介绍我的设计的英语作文

As an AI, I cant create an original English essay for you without specific details about your design. However, I can provide you with a template that you can fill in with your own information. Heres a basic structure for an essay introducing a design: Title: Introducing My DesignIntroduction:Briefly introduce the purpose of your design.State the significance or the problem it aims to solve.Paragraph 1: Background and ContextProvide background information on the need for your design.Discuss any existing solutions and their limitations.Paragraph 2: Design ConceptDescribe the concept behind your design.Explain the inspiration and the thought process that led to this design.Paragraph 3: Design FeaturesDetail the key features of your design.Explain how each feature contributes to the overall functionality and aesthetics. Paragraph 4: Materials and Techniques UsedDiscuss the materials chosen for your design and why they were selected.Describe any special techniques or processes employed in creating your design. Paragraph 5: Benefits and AdvantagesHighlight the benefits and advantages of your design over existing solutions.Discuss how it addresses the initial problem or need.Paragraph 6: Implementation and TestingIf applicable, describe how you plan to implement or have tested your design.Share any feedback or results from testing.Conclusion:Summarize the main points of your design.Reiterate its importance and potential impact.References:List any sources or references used in your essay.Remember to personalize this template with specific details about your design to create a compelling and informative essay.。

学生成绩管理系统英文翻译

学生成绩管理系统英文翻译

文献翻译题目学生成绩管理系统的设计与实现学生姓名专业班级学号院 (系)软件学院指导教师(职称)完成时间文献翻译书名:C#设计模式作者姓名:(美)麦斯科(Metsker,S.J.)著出处:/ 2006—7-1 / 中国电力出版社主要内容:针对日常的软件开发问题,设计模式提供了一种优雅的、通用的可重用解决方案。

程序员可以通过设计模式组织程序中的对象,使其更易于编写和修改。

本书正是一本设计模式的实用指南,帮助你采用最常见的模式来编写C#程序.《C #设计模式(附光盘)》由JamesW.Cooper编著,首先简明扼要地介绍了C#、面向对象编程、继承和UML图,然后分章描述了23种设计模式及各自的使用场合,并阐明了模式在大型设计中的作用。

每种模式的用法都配有相应的示例程序演示,这些程序收录在随书配套光盘中,可以直接运行、测试、编辑和使用。

简介c#C#编程语言是为开发微软公司的.NET框架上的程序而设计的。

本章将简要介绍.NET从何而来,以及它的基本架构。

这只是为了确保你从正确的一步开始,让我借此机会提醒你一件可能显面易见的事情:C#的发音为see sharp。

1。

1.120世纪90年代后期的Windows编程在20世纪90年代后期,使用微软平台的Windows编程分化成许多分支.大多数程序员在使用Visual Basic(VB)、C或C++。

一些C和C++程序员在使用纯Win32 APl,但大多数人在使用MFC(Microsoft Found撕on Classes,微软基础类库)。

其他人已经转向了COM(Component ObjectMdodel,组件对象模型)。

所有这些技术都有自己的问题。

纯Win32 APl不是面向对象的,而且使用它的工作量比使用VIFC的更大。

MFC是面向对象的,但是它却不一致,并逐渐变得陈旧。

COM虽然概念上简单,但它的实际代码复杂,并且需要很多丑陋的、不雅的底层基础代码。

所有这些编程技术的另外一个缺点是它们主要针对桌面程序而不是Inteme t的开发。

Design Patterns

Design Patterns

2
Design Patterns [1]
• A solution to a problem that occurs repeatedly in a variety of contexts.
• Each pattern has a name.
• Use of each pattern has consequences.
4
Observer Pattern [1]
• Need to separate presentational aspects with the data, i.e. separate views and data. • Classes defining application data and presentation can be reused. • Change in one view automatically reflected in other views. Also, change in the application data is reflected in all views. • Defines one-to-many dependency amongst objects so that when one object changes its state, all its dependents are notified.
iter.CurrentItem() -> Update(this);
}
}
11
Observer Pattern: A Concrete Subject [1]
class ClockTimer : public Subject { public:
ClockTimer(); virtual int GetHour(); virtual int GetMinutes(); virtual int GetSecond(); void Tick ();

Head_First design pattern 学习总结

Head_First design pattern 学习总结

《Head First设计模式》阅读笔记1、模式(Pattern)定义策略(Strategy)模式:定义一组算法族,分别封装起来,让各个算法之间可以相互替换。

此模式让算法的变化独立于使用算法的客户。

观察者模式:定义了对象之间的一对多依赖关系,当一个对象(主题对象)的状态改变时,它的所有依赖者(观察者对象)都会收到通知并自动更新。

装饰者模式:动态地将责任加到对象身上。

如果要扩展功能,装饰者模式提供了比继承更有弹性的替代方案。

*用静态方法定义的工厂被成为静态工厂,这样就不用使用创建对象的方法来实例化对象,使用方便。

但是这样做的缺点是无法通过继承来改变创建方法的行为。

*简单工厂不是一种设计模式,但是它比较常用。

*工厂方法用来处理对象的创建,并将这样的行为封装在子类中。

这样,客户程序中关于超类的代码就和子类对象的创建代码解耦(Decouple)了。

工厂方法的定义:abstract Product factoryMethod(String type);工厂(Factory Method Pattern)方法模式:定义了一个创建对象的接口,但是由子类来决定要实例化的类是哪一个。

它让类把实例化推迟到了子类。

抽象工厂模式:提供一个接口,用于创建相关或者依赖对象的家族,而不需要明确指定具体类。

单件(Singleton)模式:确保一个类只有一个实例,并提供一个全局访问点。

命令(Command)模式:将“请求”封装成对象,以便使用请求、队列或日志来参数化其它对象。

命令模式也支持可撤销的操作。

适配器模式:将一个类的接口,转换成客户希望的另一个接口。

适配器让原本接口不兼容的类合作无间。

外观模式:提供了一个统一的接口,用来访问子系统中的一群接口。

外观模式定义了一个高层接口,让子系统更容易使用。

迭代器模式:提供一种顺序访问集合对象中各个元素的方法,而又不暴露其内部的表示(也就是数据结构)。

组合模式:将对象组合成树状结构来表现“整体/部分”的层级结构,让客户以一致的方式来处理个别对象以及对象组合。

设计风格分析报告英文

设计风格分析报告英文

设计风格分析报告英文IntroductionThis report aims to analyze different design styles used in various industries such as fashion, interior design, and graphic design. By understanding the characteristics and elements of these design styles, we can gain insights into their influences and popularity among different target audiences.1. MinimalismMinimalism is a design style that focuses on simplicity and functionality. It involves the use of clean lines, neutral colors, and uncluttered spaces. This style is often used in interior design to create a sense of calmness and order. In fashion, minimalist designs are characterized by sleek silhouettes and streamlined shapes.2. VintageVintage design style draws inspiration from various eras in the past, such as the 1920s, 1950s, or even earlier. It often incorporates elements such as retro typography, aged textures, and ornate details. Vintage style is commonly used in graphic design and branding to evoke nostalgia and create a sense of authenticity.3. ModernismModernism is a design style that emerged in the early 20th century and emphasized the use of industrial materials and functional forms. Thisstyle is characterized by clean lines, geometric shapes, and a minimalistic color palette. Modernism is commonly seen in architecture and interior design, as well as in products and furniture design.4. BohemianThe bohemian design style is associated with a free-spirited and eclectic aesthetic. It combines various patterns, textures, and colors to create a vibrant and artistic environment. In fashion, bohemian style often includes flowing fabrics, layered looks, and accessories such as hats and fringed bags.5. FuturisticFuturistic design style explores innovative and visionary concepts, often incorporating modern technologies and unconventional materials. This style is frequently used in product and transportation design to create a sense of advancement and forward-thinking. Futuristic design also plays a significant role in the entertainment industry, such as in sci-fi movies and video games.ConclusionDesign styles play a crucial role in influencing our perception and experience of a product, space, or brand. From minimalism to bohemian and futuristic styles, each design style has its unique characteristics and target audience. By understanding these different styles, designers caneffectively communicate and connect with their intended audience. It is essential to consider the context and purpose of the design to choose the most suitable style for each project.。

Visitor Design Pattern

Visitor Design Pattern

Visitor Design Pattern访问者设计模式访问者是一种行为型设计模式,它允许你在无需修改其它对象的情况下为对象添加新功能。

当你需要在多个不同对象中执行同一操作时,使用访问者可以将这些操作从对象中解耦出来,从而使代码更加模块化和易于维护。

设计模式是一种可复用的解决方案,旨在解决在特定情境中重复的问题。

设计模式有很多种,每种模式都有其特定的场景和优缺点。

在这些模式中,访问者模式是一种比较常见和灵活的模式。

下面我们来探讨一下访问者模式的实现和应用。

1. 模式定义访问者模式指的是在不改变数据结构的前提下,定义作用于该结构中的各个元素的新操作。

访问者模式的目的是将算法与对象结构分离。

在实际应用中,一般将访问者模式分为两个部分:访问者和被访问的对象。

2. 模式结构访问者模式有访问者和被访问者两个核心组成部分,其中访问者负责对对象进行不同的操作,而被访问者负责提供访问者所需操作的基本数据。

在访问者模式中,被访问者一般由一个抽象类和其子类组成。

被访问者抽象类中定义了被访问者需要支持的元素和接口,各个子类则实现了该抽象类的接口,代表不同的被访问者。

在访问者模式中,访问者一般由一个抽象类和其子类组成。

访问者抽象类中定义了访问者需要支持的操作和接口,各个子类则实现了该抽象类的接口,代表不同的访问者。

3. 模式应用访问者模式可以应用于以下场景:(1)当需要在对象结构中添加新的操作而不改变其原有结构时,可以使用访问者模式。

由于访问者模式可以将算法与数据结构分离,从而使得算法不会对数据结构造成任何影响。

(2)当对象的结构比较稳定,但是需要在该结构上频繁增加新的操作时,可以使用访问者模式。

使用这种模式可以减少因操作变化而导致的影响,并且不会影响到原有的数据结构。

(3)当一组对象中包含多个不同的类,并且需要对这些对象进行相同的操作时,可以使用访问者模式。

在这种情况下,访问者模式可以将多个不同的对象转化为一个访问接口,从而方便对这些对象进行处理。

设计类英语面试自我介绍

设计类英语面试自我介绍

设计类英语面试自我介绍English Interview Self-Introduction for Design Position.Good day, esteemed interviewers. It's an honor to have the opportunity to introduce myself for consideration forthe design position at your esteemed company. My name is [Your Name], and I hold a degree in Visual Communications from [Your University], where I honed my skills in graphic design, user experience, and brand development.Since graduating, I have been actively involved in various design projects, both independently and as part of teams. My design philosophy is rooted in simplicity, functionality, and aesthetics. I believe that effective design should not only look good but also serve a purpose, enhancing the user's experience and adding value to the brand.One of the projects that I am particularly proud of is my work on the redesign of a local charity's website. Thecharity had an outdated online presence that did notreflect the impactful work they were doing in the community. Through research and collaboration, we created a new design that was both visually appealing and user-friendly. This redesign led to a significant increase in website traffic and donations, which was a testament to the power of effective design.In addition to my design skills, I also possess strong project management abilities. I understand the importanceof deadlines and budgets, and I am adept at managingmultiple projects simultaneously. My attention to detailand meticulous planning ensure that projects are completed on time and within budget, while maintaining the highest level of quality.Moreover, I am always eager to learn and explore new design trends and technologies. I believe that staying updated with the latest design software, tools, and techniques is crucial for staying competitive in the design industry. To this end, I regularly participate in workshops, seminars, and online courses to expand my knowledge andskills.Communication is also a key strength of mine. I am able to effectively articulate my design ideas and concepts to clients, stakeholders, and team members. I value feedback and am always open to suggestions and critiques that can help improve my designs.I am also fluent in [Other Languages if Any], which I believe adds to my ability to work in a diverse and global team environment. My multicultural background has equipped me with the ability to understand and appreciate different cultural perspectives, which is invaluable in today's interconnected world.In conclusion, I am confident that my skills, experience, and passion for design make me a strong candidate for this position. I am excited about the opportunity to contribute to your team and bring my unique perspective and creativity to your projects. Thank you for considering my application, and I look forward to the possibility of discussing my qualifications further.。

Interpreter Design Pattern

Interpreter Design Pattern

Interpreter Design Pattern翻译器设计模式设计模式是指在软件设计过程中,被反复使用,经过验证效果优秀的经验总结。

设计模式不是一种具体的代码实现,而是一种思维模式和工作方法。

在日常的项目开发过程中,我们往往会遇到各种各样的问题,学习设计模式可以更好地提高我们的解决问题能力。

本文将介绍Interpreter Design Pattern,翻译器设计模式,并介绍其在项目开发过程中的应用。

一、设计模式简介1986 年 Gamma、Helm、Johnson 和 Vlissides 四位作者合作编写了一本著名的著作——《设计模式-可复用面向对象软件的基础》。

这本书将二十多年软件开发中最有效的方法整理出来,总结成 23 种设计模式。

这些模式可以分为三类,即创建型模式(Creational Patterns)、结构型模式(Structural Patterns)和行为型模式(Behavioral Patterns)。

1.创建型模式指的是如何创建和管理对象的设计模式,这些模式提供了创建对象的机会以及封装一个类创建实例对象过程中所要使用的信息。

2.结构型模式指的是如何处理类或对象的组合,这些模式可以让你在设计的时候组合对象更加灵活,通过这种方式可以使得系统中各种“角色”的职责更加清晰。

3.行为型模式指的是在不同的对象之间的交互和职责分配上,这些模式是关注的是产生某种特定类型的行为,而不是仅仅如何实现它们。

二、Interpreter Design Pattern翻译器设计模式简介Interpreter Pattern 翻译器设计模式是一种行为型设计模式,该模式定义了一个语言解释器,它将输入的表达式解析成相应的语言。

通常用于实现程序的编译和解释,它支持程序的动态性及其可扩展性。

翻译器设计模式中要用到的类部分包括语法分析器、符号表、Token 等关键元素。

三、翻译器设计模式的工作原理翻译器设计模式的工作原理是通过使用递归的方式执行算法的过程,这种方式非常适合用于构建解释型的计算机语言。

如何介绍篆刻印章英语作文范文

如何介绍篆刻印章英语作文范文

如何介绍篆刻印章英语作文范文1Oh my goodness! Let me tell you something amazing about seal engraving. Seal engraving is a wonderful art form that has a long history and deep cultural significance.First of all, let's talk about the materials. Common materials used for seal engraving include stones, like jade and marble, and woods, such as rosewood and boxwood. These materials have their unique textures and hardness, which affect the engraving process and the final effect of the seal.Then, there are the essential tools. A sharp engraving knife is a must-have! And don't forget the inkpad, which gives the seal its color and life.Now, let's look at the basic steps. The first step is to design the pattern or characters you want to engrave. This requires careful thinking and creativity! After that, comes the engraving process. You need to hold the knife steadily and carve with precision. Isn't it exciting? And finally, there's the refinement step. This is where you make any necessary adjustments to make the seal perfect.So, dear friends, isn't seal engraving a fascinating art? Try it and you'll discover a whole new world of creativity and fun!2Seal engraving is an art form that holds profound artistic value andrich cultural connotations! How can we introduce it? Let's explore together.Seal engraving has a long history that dates back thousands of years. It is not merely a form of artistic expression but also a carrier of cultural traditions. Take the seals from ancient emperors, for instance. These seals were not only a symbol of their authority but also an embodiment of the aesthetic concepts of that era. The exquisite patterns and delicate carvings on them showcase the superb craftsmanship and artistic pursuit of the time.Another remarkable example is the seals of famous scholars and calligraphers. Their seals often incorporate elements such as poetry, philosophy, and personal ideals. These seals not only add charm to their works but also reflect their unique cultural insights and spiritual world.The artistic value of seal engraving lies in its combination of form and meaning. The various shapes, lines, and strokes in the engraving create a visual feast. At the same time, the meaning conveyed by the text on the seal enriches our understanding of culture and history.Isn't seal engraving a wonderful art form? It deserves our attention and appreciation! Let's delve deeper into this world of artistic and cultural wonders.3Seal engraving is an ancient and exquisite art form that has a rich history and diverse styles. Let's take a look at some of the different styles of seal engraving, such as the Qin and Han styles and the Ming and Qingstyles!The Qin and Han style seals are characterized by their simplicity and grandeur. The lines are bold and straightforward, giving a sense of strength and stability. They seem to tell us stories of the ancient times with their powerful presence! How amazing it is to think that these seals have carried the weight of history for so long!On the contrary, the Ming and Qing style seals are known for their delicacy and refinement. The details are meticulously crafted, and the patterns are often very intricate. Isn't it fascinating to observe the fine lines and exquisite patterns? They show the pursuit of elegance and sophistication during those periods.In conclusion, both the Qin and Han style and the Ming and Qing style of seal engraving have their unique charm. The former represents the simplicity and might of ancient times, while the latter reflects the refinement and elegance of later periods. Which style do you prefer? Isn't the world of seal engraving truly wonderful and full of surprises?4Oh my goodness! Have you ever wondered about the wonderful world of modern seal engraving? Seal engraving, an ancient art form, has witnessed remarkable innovations and developments in modern times. It now holds a significant position in contemporary art!Take some modern artists for instance. They ingeniously combinetraditional seal engraving techniques with modern elements to give birth to astonishing new art forms. How fascinating is that? They might incorporate elements like abstract patterns, digital designs, or even elements from popular culture. This fusion not only breathes new life into the traditional art but also makes it more accessible and appealing to the modern audience.The beauty of modern seal engraving lies in its ability to bridge the gap between the past and the present. It showcases the timeless charm of traditional craftsmanship while adapting to the ever-changing tastes and preferences of the contemporary art scene. Isn't it just amazing how such an ancient art can remain relevant and thrive in today's world?So, the next time you come across a modern seal engraving work, take a moment to appreciate the creativity and innovation behind it. You'll surely be astounded by the wonders it holds!5Oh my goodness! Let me tell you about how to appreciate and distinguish excellent seal engraving works. Firstly, the layout of the seal is of great significance. A well-arranged seal should have a balanced and harmonious composition. Imagine if the characters or patterns are randomly placed, wouldn't it be a chaos? How wonderful it is when the elements are distributed neatly and proportionally! Secondly, the knife technique is crucial. The strokes made by the knife should be smooth and forceful. Can you picture the power and delicacy that a masterful knifestroke brings? Isn't it amazing? Also, the lines are another key aspect. Fine and fluent lines show the artist's superb skills and deep understanding of art. Isn't that something to marvel at? For instance, when the lines are thick and thin, curved and straight, in a perfect combination, it creates a unique charm. How could one not be impressed by such a masterpiece? So, when you encounter a seal engraving work next time, pay attention to these aspects and you will truly appreciate the beauty and value of it!。

skeleton pattern 设计模式

skeleton pattern 设计模式

skeleton pattern 设计模式Skeleton pattern (sometimes known as the Template Method pattern) is a behavioral design pattern that defines the skeleton of an algorithm in a base class but allows subclasses to override specific steps of the algorithm without changing its structure.The key idea behind the Skeleton pattern is to define a template or a blueprint for an algorithm and allow subclasses to provide their own implementations for certain parts of the algorithm. This allows for reuse and flexibility in code design.The pattern consists of two main components:1. Abstract Base Class: This is the base class that defines the skeleton of the algorithm. It contains the overall template or blueprint for the algorithm, including the general steps and the sequence in which they should be executed. It also contains one or more abstract methods that represent the steps that need to be overridden by subclasses.2. Concrete Subclasses: These are the subclasses that inherit from the abstract base class and provide their own implementations for the abstract methods. Each concrete subclass can customize and override certain specific steps of the algorithm, while keeping the overall structure and sequence intact.By separating the overall algorithm into a base class and multiple subclasses, the Skeleton pattern promotes code reuse and modularity. It allows for easy extension and customization of the algorithm without modifying the core structure. Additionally, itprovides a way to encapsulate common or repetitive code within the base class, reducing code duplication.Overall, the Skeleton pattern is useful when you have an algorithm that has a fixed structure but allows for customization or variation in certain steps. It helps to decouple the algorithm's core logic from the specific implementations, promoting flexibility and maintainability in code design.。

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Design Patterns
宋杰
Song Jie
东北大学软件学院
Software College, Northeastern University
What are design patterns?
Recurring solutions to design problems you see over and over. (Alpert et al, 1998)
A set of rules describing how to accomplish certain tasks in
the realm of software development. (Pree, 1994)
Focus on reuse of recurring architectural design themes (Coplien and Schmidt, 1995)
Address a recurring design problem that arises in a specific context and presents a solution to it (Buschmann. et al,
1996)
Identify and specify abstractions that are above the level of single classes or instances, or of components. (GoF,1995)
Why study design patterns?
Up to now in your degree you have been taught the OO basics and some higher level principles, BUT always building software from first principles is wasteful;
Better if you can use some existing software or patterns produced and tested by experts;
They help when you’re in the situation where you think: “Oh I’ve seen this problem before and I solved it by …
Why use design patterns?
Reuse of design expertise;
Support software that is flexible to change (extension).
Improve communication between engineers: A common vocabulary;
Problems with design patterns? Trade-off: design can become a little more complicated.
Inexperienced users often try to use more design patterns than they need to
You need to ask yourself why you’re using the design pattern.
Patterns History
Software design patterns were inspired by the work of Christopher Alexander (architect).
Developed a pattern language for describing
architectural features in buildings (1977).
Seminal work of 23 software design patterns in:
E. Gamma, R. Helm, R. Johnson and J. Vlissades,
Design patterns: Elements of reusable object-
oriented software, Addison-Wesley, 1994
Informally known as the Gang of Four (GoF)
Pattern List –Three types of pattern
Creational Patterns创建型 Factory Method (工厂方法)
Abstract Factory (抽象工厂)
Singleton (单例)
Builder (创建)
Prototype(原型)
Structural Patterns结构型 Adapter(适配器)
Decorator(装饰器)
Composite(合成)
Facade(外观)
Flyweight(享元)
Proxy(代理)
Bridge(桥梁) Behavioral Patterns 行为型 Interpreter(解释器)
Template Method(模板方法)
Chain of Responsibility(责任链)
Command(命令)
Iterator(迭代器)
Mediator(调停者)
Memento(备忘录)
Observer(观察者)
State(状态)
Strategy(策略)
Visitor(访问者模式)
How to introduce a pattern
Intent
Structure
Participants
Collaborations Consequences Applicability Implementation Sample Code
Examples
Variation
Extension
Related Patterns
Referenced Book
Authors (GoF):
Erich Gamma
Richard Helm
Ralph Johnson
John M. Vlissides
Published by:
Addison Wesley 1994
Referenced Book
Authors:
Eric Freeman &
Elisabeth Freeman
with Sierra & Bert
Bates
Published by:
O’REILLY 2005
Let’s go to next…。

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