coupling和cohesion都是依照从好到坏排序的对于好的software design，应该有较高的cohesion和较低的coupling.5个coupling：data coupling 共享原子数据stamp coupling 共享简单数据结构(其实只用到了数据结构的一小部分)control coupling 一个给另一个传参数 调用被调用模块的一小部分common coupling 都可能写全局变量c…

对于门路笼罩，要把每一条路的每一种组合都走一遍。在这里我标记了可能呈现分叉的abcdef几条路，对于门路笼罩应该把以下门路的状况都走一遍：acefbcefacdfbcdf

Software EngineeringChapter1:introsoftware=computer programs + associated documentationsoftware we need methods to develope high-qualified software:standardsystematicefficientdependableeasy-to-usesoftware engineering is an discipline that is concerned with all aspects of software production from …

For the purposes of this book, I define “complexity” in a practical way. Complexity is anything related to the structure of a software system that makes it hard to understand and modify the system. Complexity can take many forms. For example, it might be hard to understand how a piece of code wor…

This book is about how to design software systems to minimize their complexity. The first step is to understand the enemy. Exactly what is “complexity”? How can you tell if a system is unnecessarily complex? What causes systems to become complex? This chapter will address those questions at a hig…

Writing computer software is one of the purest creative activities in the history of the human race. Programmers aren’t bound by practical limitations such as the laws of physics; we can create exciting virtual worlds with behaviors that could never exist in the real world. Programming doesn’t re…

这个概念来自于 Joel Spolsky 的博客（The Law of Leaky Abstractions – Joel on Software）。文章大略讲述了，从 TCP 协定的封装让 IP 协定变得稳固牢靠，推导出“形象封装能够失去优良的设计”，再到如果数据传输不再稳固，那就使用者就不得不深刻底层（甚至到物理层，查看是不是宠物蛇咬断了网线）去排除问题，总结出“…

摘要：软件工程须要哪些能力以及如何保障这些能力？哪些地方咱们须要留神复杂度的问题？小引在本文中咱们将探讨如下问题：1. 软件工程须要哪些能力以及如何保障这些能力？2. 哪些地方咱们须要留神复杂度的问题？3. 考试的目标是什么？4. 莫要让标准解放了咱们的手脚，成为技术的奴隶。5. 要让人的能力施展到极致，良好的…

咱们处于变动很快的时代，无论是商业还是科技。一家公司看上去商业很胜利，兴许前脚刚上市，后脚就因为什么而退市，甚至开张；一项看似高大上的技术横空出世，各类媒体争先恐后地撰文介绍，热度炒得老高，没准没多久就呈现了竞争者、替代者。

对于什么是软件，似乎所有人都觉得定义是那么的显而易见。直觉上来看，只要砸在我们脚上能疼的，都算是硬件hardware,除此之外的都是软件 Sotware。如果这样的话，使用软件工具设计的专用集成电路（ Application-Specific Integrated Circuit ASIC）和基于模型生成的C代码算什么呢？