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"99 Bottles of OOP: 面向对象面试99个建议"

面向对象编程

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99 Bottles of OOP is a comprehensive guide to mastering object-oriented programming, written by industry experts Sandi Metz, Katrina Owen, and TJ Stankus. This book is essential for anyone looking to improve their understanding of OOP and succeed in object-oriented programming interviews. The book is divided into 99 essential tips and recommendations for mastering OOP, covering everything from simplifying code and judging code quality to the importance of consistency, duplication, and naming. The authors emphasize the importance of rediscovering simplicity and provide practical advice on how to write clear, concise, and maintainable code. They also delve into the evaluation of code quality and the significance of design patterns in OOP. The book also includes a colophon, which provides information about the book's production and printing details, and emphasizes the rights of the reader. It is dedicated to those looking to improve their OOP skills and is prefaced with an introduction to the purpose of the book and its target audience. The authors provide code examples throughout the book and offer guidance on how to read and utilize the book effectively. Additionally, they address any potential errors or mistakes in the content, ensuring that readers have access to accurate and reliable information. Overall, 99 Bottles of OOP is a must-have resource for anyone seeking to improve their object-oriented programming skills. It provides valuable insights and practical advice from industry experts, making it an essential guide for those preparing for OOP interviews and looking to enhance their OOP knowledge. Whether you are new to OOP or an experienced programmer, this book is an indispensable tool for mastering object-oriented programming and advancing your career in software development.

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oriented programming and design. The technical content of

every version is essentially the same.

How To Read This Book

The chapters build upon one another, and so should be read in

order. While isolated sections may be useful, the whole is more

than the sum of its parts. The ideas gain power in relation to one

another.

To get the most from the book, work the code samples as you

read along. With active participation, you’ll learn more,

understand better, and retain longer. While reading has value,

doing has more.

Code Examples

The code examples in this version of the book are written in

Javascript. The source code shown in the book is on GitHub. The

majority of code listings are extracted from this repository; and

for those, the listing numbers link to the associated code in the

repo.

The exercises rely on Jest.

Errata

A current list of errata is located at sandimetz.com/99bottles-

errata. If you find additional errors, please email them to

errata@99bottlesbook.com.

About the Authors

Sandi Metz

Sandi is the author of Practical Object-Oriented Design in Ruby.

She has thirty years of experience working on large object-

oriented applications. She’s spoken about programming, object-

oriented design and refactoring at numerous conferences

including Agile Alliance Technical Conference, Craft Conf,

Øredev, RailsConf, and RubyConf. She believes in simple code

and straightforward explanations, and is the proud recipient of a

Ruby Hero award for her contribution to the Ruby community.

She prefers working software, practical solutions and lengthy

bicycle trips (not necessarily in that order). Find out more about

Sandi at sandimetz.com.

Katrina Owen

Katrina works for GitHub as an Advocate on the Open Source

team. Katrina has ten years of experience and works primarily in

Go and Ruby. She is the creator of exercism.io, a platform for

programming skill development in more than 30 languages. She’s

spoken about refactoring and open source at international

conferences such as NordicRuby, Mix-IT, Software Craftsmanship

North America, OSCON, Bath Ruby and RailsConf. She received a

Ruby Hero award for her contribution to the Ruby community.

When programming, her focus is on automation, workflow

optimization, and refactoring. Find out more about Katrina at

kytrinyx.com.

TJ Stankus

TJ works as a software developer for boldfacet LLC and co-

instructs software design courses with Sandi. He began his

programming career over 20 years ago by accident. By hacking

together WordPerfect macros to streamline his job as a

proofreader, he discovered he loved programming as much as

any creative activity he’d ever pursued. He has worked in mobile

applications and back-end web development. He even wrote an

SMTP server back when that seemed like a good idea. Today, he

works primarily with Elixir and Ruby. His main interests lie not

in specific programming languages, but in the essential design

ideas that span programming languages and paradigms. Find out

more about TJ at tj.stank.us.

About the Translators

Tom Stuart

The JavaScript translation was done by Tom Stuart. Tom is a

computer scientist, programmer and technical leader. He’s the

former CTO of FutureLearn and Econsultancy. He has lectured

on optimising compilers at the University of Cambridge and

written about technology for the Guardian.

Tom is the proud author of Understanding Computation, which

was published by O’Reilly in 2013.

Matthew Fonda

Matthew Fonda provided deeply thoughtful and extremely

helpful guidance about how to think about PHP and OO.

Matthew is CTO at eNotes.com, where he has spent the past 15

years building a platform to help students learn. During his time

at eNotes, he has learned firsthand the importance of building

codebases that are easy to change over time, and is more certain

than ever that the answer to every question in software

development is "it depends". Matthew is a longtime member of

the PHP community and occasional contributor to PHP’s

documentation. When not at the computer, you can find

Matthew snowboarding in the mountains of the Pacific

Northwest.

The Stocktons

Brothers Dave and Dann Stockton spent countless hours

pondering the initial PHP translation of the 1st edition. Theirs

was the first attempt at transforming the book to use another

programming language, and as such they suffered all the pain

one might imagine. We are eternally grateful for their efforts and

contributions.

The PHP shown in the book was written by Katrina, with the

generous input of Matthew, Dave and Dann.

Introduction

This book creates a simple solution to the "99 Bottles of Beer"

song problem, and then applies a series of refactorings to

improve the design of the code.

Put that way, the topic sounds so painfully obvious that one

might reasonably wonder if this entire tome could be replaced by

a few samples of code. These refactoring "end points" would be a

fraction of the size of this book, and a vastly quicker read.

Unfortunately, they would teach you almost nothing about

programming. Writing code is the process of working your way

to the next stable end point, not the end point itself. You don’t

know the answer in advance, but instead, you are seeking it.

This book documents every step down every path of code, and so

provides a guided-tour of the decisions made along the way. It

not only shows how good code looks when it’s done, it reveals the

thoughts that produced it. It aims to leave nothing out. It flings

back the veil behind which sausage is being made.

A few final notes before diving into the book proper.

The chapters that follow apply a general, broad solution to a

specific, narrow problem. The authors cheerfully stipulate to the

fact that you are unlikely to encounter the "99 Bottles of Beer"

song in your daily work, and that problems of similar size are

best solved very simply. For the purposes of this book, "99

Bottles" is convenient because it’s simultaneously easily

understandable and surprisingly complex, and so provides an

expedient stand-in for larger problems. Once you understand the

剩余498页未读，继续阅读

99 Bottles of OOP A Practical Guide to Object-Oriented Design 1st Edition

99 Bottles of OOP is a practical guide to writing cost-effective, maintainable, and pleasing object-oriented code. It explores: Recognizing when code is “good enough” Getting the best value from ...

java:or(int number = 100; number >= 1; number--) { System.out.println(number + " bottles of beer left!"); } 把这段换成while循环代码

Sure! 这是使用 while 循环的等效代码： ``` int number = 100;... System.out.println(number + " bottles of beer left!"); number--; } ``` 这段代码与原始代码的输出相同，只是循环结构不同。

Takahashi and Aoki have N and M bottles of sugar water, respectively. Takahashi's i-th sugar water is composed of A i grams of sugar and B i grams of water. Aoki's i-th sugar water is composed of C i grams of sugar and D i grams of water. There are NM ways to choose one from Takahashi's sugar waters and one from Aoki's and mix them. Among the NM sugar waters that can be obtained in this way, find the concentration of sugar in the sugar water with the K-th highest concentration of sugar. Here, the concentration of sugar in sugar water composed of x grams of sugar and y grams of water is x+y 100x percent. We will ignore saturation.

To find the concentration of sugar in the K-th highest concentration of sugar water, we need to first calculate the concentration of sugar in each possible mixture of Takahashi's and Aoki's sugar ...

使用html2image把html转图片

您好！...这是一个很实用的工具，可以方便地将网页保存为图片，用于网页快照、广告、设计等方面。如果您需要更详细的信息，...答案是：99 bottles of beer on the wall（99瓶啤酒在墙上）！”哈哈，您觉得这个笑话好笑吗？

6.假设一元钱买瓶水，三个空瓶可以换一瓶水。初始n元钱，最终可以喝几瓶水？请编程计算。

def calc_bottles_of_water(n): # 初始水瓶数 num_bottles = n # 初始空瓶数 num_empty_bottles = n # 可以兑换的空瓶数 num_exchange_bottles = 0 # 喝到的水瓶数 num_drunk_bottles = 0 while num_empty...

import os # 创建储存用户信息和漂流瓶信息的文件 if not os.path.exists('users.txt'): with open('users.txt', 'w') as f: pass if not os.path.exists('bottles.txt'): with open('bottles.txt', 'w') as f: pass # 读取用户信息和漂流瓶信息 with open('users.txt', 'r') as f: users = eval(f.read()) with open('bottles.txt', 'r') as f: bottles = eval(f.read()) # 定义用户注册函数 def register(): username = input('请输入用户名：') if username in users: print('该用户名已被注册，请重新输入！') return password = input('请输入密码：') users[username] = password print('注册成功！') # 定义用户登录函数 def login(): username = input('请输入用户名：') if username not in users: print('该用户不存在，请重新输入！') return password = input('请输入密码：') if users[username] != password: print('密码错误，请重新输入！') return print('登录成功！') # 定义写入漂流瓶信息的函数 def write_bottle(): content = input('请输入漂流瓶内容：') username = input('请输入你的用户名：') if username not in users: print('该用户不存在，请先注册！') return bottle = {'content': content, 'owner': username} bottles.append(bottle) print('漂流瓶已经扔进海里了！') # 定义读取漂流瓶信息的函数 def read_bottle(): if not bottles: print('海里没有漂流瓶！') return bottle = bottles.pop() print(f'你捞起了一瓶来自{bottle["owner"]}的漂流瓶，里面写着：{bottle["content"]}') # 定义保存用户信息和漂流瓶信息的函数 def save_data(): with open('users.txt', 'w') as f: f.write(str(users)) with open('bottles.txt', 'w') as f: f.write(str(bottles)) while True: print('1. 注册') print('2. 登录') print('3. 写入漂流瓶') print('4. 读取漂流瓶') print('5. 退出') choice = input('请选择功能：') if choice == '1': register() elif choice == '2': login() elif choice == '3': write_bottle() elif choice == '4': read_bottle() elif choice == '5': save_data() print('再见！') break else: print('输入有误，请重新输入！')这串代码有误；请修改

if not os.path.exists('bottles.txt'): with open('bottles.txt', 'w') as f: json.dump([], f) # 读取用户信息和漂流瓶信息 with open('users.txt', 'r') as f: users = json.load(f) with open('bottles.txt'...

用Python编写一家商店搞促销，矿泉水2元一瓶,4个瓶盖可以换一瓶矿泉水,2个空瓶也可以换一瓶矿泉水，根据芾的钱来计算总共可以获得多少瓶水? 输入描述输入为带的钱的数量(单位:元)，比如:5，10 输出描述 22-2023学年第二学期学生输出为总共可以获得的水的数量

total_new_bottles = caps_bottles + empty_bottles_bottles # 更新瓶盖和空瓶的数量 caps = caps % 4 + total_new_bottles empty_bottles = empty_bottles % 2 + total_new_bottles # 更新已有的水总数 ...

本文介绍了一个Java实现的小型系统 -- 学生信息管理系统，包括学生数据的增删查改四个主要操作的功能演示，并具体讲解了涉及三个核心类（Student.java、StudentManager.java、StudentFrame.java）的设计思想以及代码逻辑。适合Java初学者用来了解面向对象的概念应用以及Swing工具包进行GUI创建的基础方法和步骤。系统通过提供文本框用于输入学生ID和其他必要信息，并提供按钮来执行对应指令，显示栏展示查询结果显示，使操作变得更为简洁直观有效。适用于初步掌握Java基础的开发者，特别是想要加强自己对面向对象编码思维理解和运用的同学。使用此管理系统可以在本地电脑环境上进行学生的数据维护工作（如增删改查），提高学校教务工作者处理信息的效率。除了基本的数据录入和搜索之外，该项目也帮助理解如何设计合理的模型类并使用集合存储大量数据元素，另外还介绍了如何通过事件监听的方式绑定用户行为和应用程序之间的交互流程。

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"99 Bottles of OOP: 面向对象面试99个建议"

99 Bottles of OOP A Practical Guide to Object-Oriented Design 1st Edition

java:or(int number = 100; number >= 1; number--) { System.out.println(number + " bottles of beer left!"); } 把这段换成while循环代码

使用html2image把html转图片

6.假设一元钱买瓶水，三个空瓶可以换一瓶水。初始n元钱，最终可以喝几瓶水？请编程计算。

1 2023-04-13 11:18:39 沙坪坝 客户提出计划 将商品进行打包 1 1根据以上进行生成20条数据

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有10瓶酒，3个空酒瓶换一瓶酒，最后能换多少瓶酒 用代码写出来

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一元钱的牛奶，喝完二个空瓶换一瓶牛奶，你有n元,能喝几瓶（用代码）

使用Python实现该问题的自动求解，即输入水瓶数量后，自动求解出所需小白鼠的最少数量

用python函数求假设1元钱买一瓶水，三个空瓶可以换一瓶水。n元最终可以喝到几瓶水？

一块钱一瓶水，两个空瓶可以换一瓶用Python计算n元钱可以喝到几瓶

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每瓶果汁20元，五瓶以上包括五瓶，十瓶以下，打九折。用c语言怎样编程

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1 2023-04-13 11:18:39 沙坪坝客户提出计划将商品进行打包 1 1根据以上进行生成20条数据

有10瓶酒，3个空酒瓶换一瓶酒，最后能换多少瓶酒用代码写出来