Learning JavaScript, 2nd Edition Review

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Learning JavaScript, 2nd Edition ReviewI recently became the maintainer for a site that uses a bit of JavaScript. Surprisingly, I have no previous experience writing or maintaining anything in JavaScript, so I needed to get up to speed, if only to know what is going on. To help me out, I picked up a copy of Shelley Powers' new book, Learning JavaScript.
I am familiar with Shelley Powers' work, having read Unix Power Tools, a book that holds a special place on my shelf for its usefulness and depth. She is obviously someone who knows what she is doing.
This book states in the preface that, "Readers of this book should be familiar with web page technology, including Cascading Style Sheets (CSS) and HTML/XHTML. Previous programming experience isn't required, though some sections may require extra review if you have no previous exposure to programming."
That sums up the only negative thing I might be tempted to say about the book. Usually, O'Reilly's "Learning" series books are excellent resources for complete newcomers and are the sort of books that I might point a novice toward. While this book is designed for the JavaScript novice, it is not the best resource for a programming/web creation novice. If you can't follow or understand the following quoted sentences, this book isn't for you. If you can, this book does an excellent job of covering the basics of JavaScript in depth and may end up being the only text you need on the topic.
"JavaScript has just three primitive data types: string, numeric, and boolean. Each is differentiated from the others by the type of value it contains: string, numeric, and boolean, respectively."
My first exposure to programming was in 1981, using BASIC on a Radio Shack TRS-80 Color Computer. Over the years, I have studied (and often forgotten, but can certainly read a bit and understand the concepts of) LISP, C, Bash scripting, Perl, Python, and more. Lately I have spent more time using PHP and enjoying it, since that is the language of things like Wordpress, Drupal, vBulletin and other commonly used CMS and interactive web site software. The two sentences quoted above seem perfectly clear to me, but I can imagine what they must seem like to someone with no experience with programming languages. So, now you have been warned. Let's get to the good stuff for those who understand the jargon.
This book is clear, with enough detail to help you understand what is happening without bogging you down in the minutiae. The reader is expected to see how and why each facet of the language would be useful, so the examples given are simple and seem to be designed to help the reader get the feel for usage without pretending to be a cookbook of programming recipes, although some seem quite useful as they are, such as Chapter 6's code for browser detection, which allows you to modify content and/or how it is displayed based on the web browser being used to view your site.
The text covers everything you are likely to need while using JavaScript, and more importantly for me, most everything a person is likely to stumble across when reading existing code. You get a solid introduction to data types and variables, operators, statements, objects, and functions. This is built upon with chapters on debugging and cross-browser compatibility. This new second edition (just released earlier in 2009) has several updates and changes from the previous version including a wonderful comparison of the benefits of generating and processing XML data using Ajax versus using JSON.
If you are considering using JavaScript on a website that includes the dynamic creation of web pages, or if you have inherited one that you are now responsible for maintaining, this book would be a good resource to help you start to understand one of the more common languages used for doing so. This is especially true if you have any prior experience with any other programming language. If you want a cookbook, scripted-style, "do this, now do that" sort of beginner's guide to making a site that holds your hand through the whole process, this is not the book you want.Learning JavaScript, 2nd Edition Overview
If you're new to JavaScript, or an experienced web developer looking to improve your skills, Learning JavaScript provides you with complete, no-nonsense coverage of this quirky yet essential language for web development. You'll learn everything from primitive data types to complex features, including JavaScript elements involved with Ajax and dynamic page effects. By the end of the book, you'll be able to work with even the most sophisticated libraries and web applications. Complete with best practices and examples of JavaScript use, this new edition shows you how to integrate the language with the browser environment, and how to practice proper coding techniques for standards-compliant websites. This book will help you:



Learn the JavaScript application structure, including basic statements and control structures
Identify JavaScript objects -- String, Number, Boolean, Function, and more
Use browser debugging tools and troubleshooting techniques
Understand event handling, form events, and JavaScript applications with forms
Develop with the Browser Object Model, the Document Object Model, and custom objects you create
Learn about browser cookies and more modern client-side storage techniques
Get details for using XML or JSON with Ajax applications
Learning JavaScript follows proven learning principles to help you absorb the concepts at an easy pace, so you'll learn how to create powerful and responsive applications in any browser.

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