Have you ever wondered how your GPS can find the fastest way to your destination, selecting one route from seemingly countless possibilities in mere seconds? How your credit card account number is protected when you make a purchase over the Internet? The answer is algorithms. And how do these mathematical formulations translate themselves into your GPS, your laptop, or your smart phone? This book offers an engagingly written guide to the basics of computer algorithms. In Algorithms Unlocked, Thomas Cormen -- coauthor of the leading college textbook on the subject -- provides a general explanation, with limited mathematics, of how algorithms enable computers to solve problems. Readers will learn what computer algorithms are, how to describe them, and how to evaluate them. They will discover simple ways to search for information in a computer; methods for rearranging information in a computer into a prescribed order ("sorting"); how to solve basic problems that can be modeled in a computer with a mathematical structure called a "graph" (useful for modeling road networks, dependencies among tasks, and financial relationships); how to solve problems that ask questions about strings of characters such as DNA structures; the basic principles behind cryptography; fundamentals of data compression; and even that there are some problems that no one has figured out how to solve on a computer in a reasonable amount of time.

本书是JavaScript 超级畅销书的最新版。ECMAScript 5 和HTML5 在标准之争中双双胜出，使大量专有实现和客户端扩展正式进入规范，同时也为JavaScript 增添了很多适应未来发展的新特性。本书这一版除增加5 章全新内容外，其他章节也有较大幅度的增补和修订，新内容篇幅约占三分之一。全书从JavaScript 语言实现的各个组成部分——语言核心、DOM、BOM、事件模型讲起，深入浅出地探讨了面向对象编程、Ajax 与Comet 服务器端通信，HTML5 表单、媒体、Canvas（包括WebGL）及Web Workers、地理定位、跨文档传递消息、客户端存储（包括IndexedDB）等新API，还介绍了离线应用和与维护、性能、部署相关的最佳开发实践。本书附录展望了未来的API 和ECMAScript Harmony 规范。
本书适合有一定编程经验的Web 应用开发人员阅读，也可作为高校及社会实用技术培训相关专业课程的教材。

如果你是网页设计师或应用开发者，对复杂的页面样式、改进可访问性以及节省时间和精力感兴趣，决不能错过这本书。这一修订版全面阐述了 CSS 的实现方式，还深入分析了最新的 CSS 规范。
CSS 是一门不断发展的语言，用于描述 Web 内容在屏幕、打印机、语音合成器、屏幕阅读器和聊天窗口上的表现。各种物联网设备，不论屏幕尺寸大小，只要有浏览器，就用得到 CSS，这其中包括手机、计算机、视频游戏、电视、手表、自助服务终端和汽车控制台。本书两位作者 Eric Meyer 和 Estelle Weyl 向您展示了如何通过布局、过渡和动画、边框、背景、文本属性，以及许多其他工具和技术来改善用户体验、加快开发速度、避免潜在的错误，并为您的应用程序增光添色。

JavaScript语言有很多复杂的概念，但却用简单的方式体现出来（比如回调函数），因此，JavaScript开发者无需理解语言内部的原理，就能编写出功能全面的程序；就像收音机一样，你无需理解里面的管子和线圈都是做什么用的，只要会操作收音机上的按键，就可以收听你喜欢的节目。然而，JavaScript的这些复杂精妙的概念才是语言的精髓，即使是经验丰富的JavaScript开发者，如果没有认真学习也无法真正理解语言本身的特性。正是因为绝大多数人不求甚解，一遇到出乎意料的行为就认为是语言本身有缺陷，进而把相关的特性加入黑名单，久而久之就排除了这门语言的多样性，人为地使它变得不完整、不安全。
“你不知道的JavaScript”系列就是要让不求甚解的JavaScript开发者迎难而上，深入语言内部，弄清楚JavaScript每一个零部件的用途。本书介绍了该系列的两个主题：“作用域和闭包”以及“this和对象原型”。掌握了这些知识之后，无论什么技术、框架和流行词语，你都能轻松理解。

If you've ever spent hours renaming files or updating hundreds of spreadsheet cells, you know how tedious tasks like these can be. What if you could have your computer do that for you? In this second edition of Automate the Boring Stuff with Python, you'll learn the basics of programming in Python, the fastest growing programming language today, before moving on to create Python programs that effortlessly perform useful and impressive feats of automation to:
Search for text in a file or across multiple files
Create, update, move, and rename files and folders
Search the Web and download online content
Update and format data in Excel spreadsheets of any size
Split, merge, watermark, and encrypt PDFs
Send reminder emails and text notifications
Fill out online forms
This updated edition is full of step-by-step instructions that walk through each program. Practice projects at the end of each chapter challenge you to improve those programs and use your newfound skills to automate similar tasks.
Don't spend your time doing work a well-trained monkey could do. Even if you've never written a line of code, you can make your computer do the grunt work. Learn how in Automate the Boring Stuff with Python, 2nd Edition.