JavaScript: The Good Parts |  | Author: Douglas Crockford
Publisher: Yahoo Press
Category: Book
List Price: $29.99
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Rating:  67 reviews
Sales Rank: 4278
Media: Paperback
Edition: 1
Pages: 176
Number Of Items: 1
Shipping Weight (lbs): 0.7
Dimensions (in): 9.4 x 7.1 x 0.6
ISBN: 0596517742
Dewey Decimal Number: 005.133
EAN: 9780596517748
ASIN: 0596517742
Publication Date: May 2008
Availability: Usually ships in 1-2 business days
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Product Description
Most programming languages contain good and bad parts, but JavaScript has more than its share of the bad, having been developed and released in a hurry before it could be refined. This authoritative book scrapes away these bad features to reveal a subset of JavaScript that's more reliable, readable, and maintainable than the language as a whole-a subset you can use to create truly extensible and efficient code.
Considered the JavaScript expert by many people in the development community, author Douglas Crockford identifies the abundance of good ideas that make JavaScript an outstanding object-oriented programming language-ideas such as functions, loose typing, dynamic objects, and an expressive object literal notation. Unfortunately, these good ideas are mixed in with bad and downright awful ideas, like a programming model based on global variables.
When Java applets failed, JavaScript became the language of the Web by default, making its popularity almost completely independent of its qualities as a programming language. In JavaScript: The Good Parts, Crockford finally digs through the steaming pile of good intentions and blunders to give you a detailed look at all the genuinely elegant parts of JavaScript, including:
- Syntax
- Objects
- Functions
- Inheritance
- Arrays
- Regular expressions
- Methods
- Style
- Beautiful features
The real beauty? As you move ahead with the subset of JavaScript that this book presents, you'll also sidestep the need to unlearn all the bad parts. Of course, if you want to find out more about the bad parts and how to use them badly, simply consult any other JavaScript book.
With JavaScript: The Good Parts, you'll discover a beautiful, elegant, lightweight and highly expressive language that lets you create effective code, whether you're managing object libraries or just trying to get Ajax to run fast. If you develop sites or applications for the Web, this book is an absolute must.
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| Customer Reviews:
Showing reviews 1-5 of 67
 Wish I had this book when I first started Javascript June 27, 2008
Frodo Baggins (Wisconsin, United States)
166 out of 169 found this review helpful
Do you struggle when creating objects in Javascript?
Do you find the syntax to be non-intuitive and frustrating?
Do you know the difference between using a function as an object vs using an object literal?
Do you know how using object literals can simplify your code and create something similar to namespaces?
Do you know how to augment the type system -- for example, if wanted all strings to have a trim() method?
Do you know why the "new" statement is so dangerous? Do you know an alternative that eliminates the use of "new" entirely?
These are some of the topics that the book touches upon.
This book is aimed at someone with intermediate programming experience that wants to know the best way to create and use objects, arrays, types, etc. Crockford takes his experience with Javascript to show you best practices coding techniques and styles to use with Javascript. In addition, the book provides insights into what makes Javascript so confusing and what can be done about it.
You might ask "Isn't this stuff already covered in other books that I have?" The answer is no. For one, most other books use a psuedo-classical coding style (see below) to explain objects that is a source of confusion.
Javascript can be very confusing, especially for programmers who have extensive experience in other C-based languages (like myself). Writing good Javascript that uses objects, methods, etc. is hard. In Javascript, if you want to create objects, use inheritance and create methods, you have several different ways to write your code and it's difficult to know what the strengths and weaknesses of each are.
Crockford explains the problem plainly. Other C-based languages use class inheritance (Crockford calls this classical inheritance). Javascript, on the other hand, is the only popular language that uses prototype inheritance, which does not have classes. However, the syntax which Javascript uses to create object is Java-like (Crockford calls this pseudo-classical syntax). It's confusing, because it keeps you in a class-based frame of mind while working in a language that has no concept of classes.
Clarifying what's going on with the object model is the best part of this book. Crockford also explains other parts of Javascript that can be problematic and the techniques that he prefers for handling them. I don't necessarily agree with all of them, but the important thing is that he explains his reasoning.
To effectively learn Javascript, I recommend that you buy 1) a book that covers the details of the language and can be used as a reference (e.g. Javascript, the Definitive Guide) and 2) Crockford's book. Advanced programmers might also enjoy Pro Javascript Design Patterns, which shows a number of ways to combine Javascript with some of the GoF patterns. I would avoid any cookbook style books on Javascript, because you're better off using YUI, JQuery or one of the other Javascript libraries than writing your own drag-and-drops, calendars, etc.
There are a series of Yahoo! videos by Crockford that mirror the material in this book and can be found as podcasts under YUI Theater. They contain nearly all of the material in the book and probably a little more. Those videos are:
- Douglas Crockford/An Inconvenient API: The Theory of the DOM (3 parts)
- Douglas Crockford/The JavaScript Programming Language (4 parts)
- Douglas Crockford/Advanced JavaScript (3 parts)
- Douglas Crockford/Javascript The Good Parts
Beautiful book May 17, 2008
Ask Bjørn Hansen (Los Angeles, CA, United States)
51 out of 55 found this review helpful
This is a beautiful book.
First of all - at only 170 pages it is short. Even though some of the key points are repeated through the book it's dense with information. You don't need any JavaScript experience, but it's not a "beginning programming" book so if you haven't been programming before this is not the right book for you.
Reading this book a couple of times will give you an appreciation for the JavaScript language that you almost certainly didn't have before. It'll give you tools to write better programs that you and others will actually be able to maintain over time.
I've learned lots of little things that I maybe knew from experience, but now I _know_ and I know why.
This book will help you battle with JavaScript rather than against it.
Serious JavaScript programming requires strong discipline June 16, 2008
Foti Massimo (Vezia (Switzerland))
15 out of 17 found this review helpful
Serious JavaScript programming requires strong discipline to avoid many pitfalls that are somewhat encouraged by the language itself. The author is very aware of this problem and wrote a small, but very dense book, full of useful advices that comes from somebody who has doing sophisticated JavaScript programming for a long time. Crockford is very opinionated, and I don't always agree 100% with his suggestions, nevertheless, even whenever I disagree, I find his points are worth reading, his opinion is always valuable. This book would serve well both veteran JavaScript developers and programmers that, coming from different languages, may get lost among JavaScript's idiosyncrasies.
Approachable, no non-sense, thrilling to read, an excellent reference, proof that great books don't have to be huge June 7, 2008
Adam Kahtava
8 out of 8 found this review helpful
Weighing in at 140+ pages of content, this book cuts through the obscurities, pleasantries, and filler found in most technical books. Instead, this book dives straight into the heart of the JavaScript language. It presents the clearest comprehensive explanation of what makes JavaScript a great programming language that I've encountered to date. It nails the important concepts, like JavaScript's: object oriented nature, its classless (pseudoclassical) nature, and functional nature. While covering the fundamentals like JavaScript's: functions, lexical scoping, lambdas, prototypal inheritance, and functional inheritance.
This book's size makes it approachable for all audiences, its style is terse and concise. This book has the potential to do for JavaScript, what Richie's inspirational classic the C Programming Language did for the C language.
JavaScript is the programming language of the web (AJAX), and this book will guide you through the good parts of this often misunderstood language - while this book is an excellent reference, it is not intended to replace JavaScript: The Definitive Guide, you'll do best to have both these books on hand.
If you enjoyed (or are considering) this book then you may want to hear more of what Douglas Crockford has to say, check out his great JavaScript video series on the YUI Theater.
A Great JavaScript Book for Everybody July 7, 2008
Frank Stepanski (PA)
14 out of 16 found this review helpful
This is the first book by Douglas Crockford a Senior Software Archtitect at Yahoo. He is widely known as one of the most knowledgeable on JavaScript apart from the creater of JavaScript (Brendan Eich). Douglas Crockford is the creator of JSON and has written many articles and presentations on JavaScript-related topics in web development.
His book JavaScript: the Good Parts, is a short (145 pages including Appendix) but is very useful for the person who wants to expand his/her JavaScript skills and knowledge. It reviews the basics of the language in the first two chapters and then focus on intermediate and advanced topics such as objects, inheritance, arrays, and methods.
The appendix categorizes the "bad" parts of JavaScript that are not good programming syntax and should be avoided such as global variables, scope, eval function, with statement, undefined variables and so forth.
I really like how Douglas Crockford gives you everything you need in this book that is relevant to how modern developers using JavaScript program and helping you understand it easily and quickly. No long-winded explanations or extra "filler" just to make the book longer. He is right to the point and explains it in a coherent, understandable way no matter what your "technical" level is.
This is a very useful book for the client-side developer who wants either a great reference book or somebody who wants to take their skills to the next level using JavaScript.
A must buy!
Showing reviews 1-5 of 67
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