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166 of 169 people found the following review helpful:
Wish I had this book when I first started Javascript
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...
Published on June 27, 2008 by Frodo Baggins
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123 of 155 people found the following review helpful:
JavaScript: The Pretty Good Book
I'm not sure what I thought this book would be; I guess I assumed it would be along the lines of "C Traps and Pitfalls". At times, however, it seems almost more like an essay.
Certainly, parts of the book are worth five stars. I was especially pleased to see the author's treatment of how null, undefined, and NaN all relate to one another in unexpected ways --...
Published on June 14, 2008 by Jay Link
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166 of 169 people found the following review helpful:
Wish I had this book when I first started Javascript, June 27, 2008
This review is from: JavaScript: The Good Parts (Paperback)
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
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51 of 55 people found the following review helpful:
Beautiful book, May 16, 2008
This review is from: JavaScript: The Good Parts (Paperback)
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.
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123 of 155 people found the following review helpful:
JavaScript: The Pretty Good Book, June 14, 2008
This review is from: JavaScript: The Good Parts (Paperback)
I'm not sure what I thought this book would be; I guess I assumed it would be along the lines of "C Traps and Pitfalls". At times, however, it seems almost more like an essay.
Certainly, parts of the book are worth five stars. I was especially pleased to see the author's treatment of how null, undefined, and NaN all relate to one another in unexpected ways -- something that has puzzled me in the past. It was also good to see a list of the reserved keywords, some of which I didn't know before, and concrete examples of the dangers of == and != versus === and !==.
An unexpected treat was to read his discussions on the technical aspects and slowness of arrays, bitwise operators, and "with" statements in JavaScript, and the origins of "switch" in FORTRAN IV, and JavaScript's similarity to Lisp, despite its outward resemblance to C.
It was also bemusing to see his example of "flight.equipment && flight.equipment.model" on page 21, as I also learned that same lesson while working on a flight-related application.
Yet, for the head Javascript guy at Yahoo, it seems that a few things are missing. For example, while he does say on page 80 that slice() creates a shallow copy of an array, he does not make it explicitly clear that array2 = array1 will effectively create a pointer, i.e., a copy by reference. To make a truly independent copy of an array, one needs array2 = array1.slice() (no arguments necessary). This caused me a day of frustration when I first learned it.
And was it not Yahoo themselves that determined that scripts should come at the end of a web page to improve load speed? Why is that not in here?
We also have nothing about compression techniques.
On the web, for free, one can read Andy King's superb 2003 article on "Optimizing JavaScript For Execution Speed". And most of the discussion on objects can be learned much more succinctly and with better examples from MDC's "Core JavaScript 1.5 Guide".
One can learn a lot about download optimization from Dean Edwards.
Chapter 4 (Functions) was good; Chapter 2 (Grammar) did nothing for me.
I was also a little disappointed with Appendix B, "The Bad Parts". Most of this dealt with undisciplined programming as opposed to flaws with the language itself. E.g., "switch" statement fall-throughs are bad. Are they? If one of your people creates an unintentional fall-through, then deal with him; don't blame the language. Does Crockford also believe that firearms should be banned because of the potential of misuse, even though they have a valid purpose? How about steak knives? This is kind of like Edsger W. Dijkstra telling us that we can never use GOTO, even though it does have its place.
Further, I've used "continue" statements effectively, albeit not so often. Maybe I'm a bad programmer?
And then, he advises against autoincrements!! (++)
Regarding style, the book is definitely filled with the usual O'Reilly collegiate pompousness that's often good, sometimes not-so-good.
In summary, there are some good parts, but as a whole this is yet another pricey programming book from which I only needed 10 pages.
If you're at the plateau of understanding that it's actually the DOM that's slow and inefficient, and that Javascript is only guilty by association, and that it's actually an elegant little language, then there's probably something in this book for you.
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15 of 17 people found the following review helpful:
Serious JavaScript programming requires strong discipline, June 16, 2008
This review is from: JavaScript: The Good Parts (Paperback)
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.
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8 of 8 people found the following review helpful:
Approachable, no non-sense, thrilling to read, an excellent reference, proof that great books don't have to be huge, June 7, 2008
This review is from: JavaScript: The Good Parts (Paperback)
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.
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14 of 16 people found the following review helpful:
A Great JavaScript Book for Everybody, July 7, 2008
This review is from: JavaScript: The Good Parts (Paperback)
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!
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10 of 11 people found the following review helpful:
Essential Read For Javascript Developers, June 19, 2008
This review is from: JavaScript: The Good Parts (Paperback)
'JavaScript: The Good Parts' is a beautiful book that is a must-buy for all Javascript developers out there. Written with brevity clearly in mind (total is only a scant 150+ pages), this book will teach you how to become a BETTER Javascript developer and know why you want to do some things one way and avoid the pitfalls of doing things the WRONG way.
This book is all about efficiency and cleanliness. Written by one of the main developers of JSON, this book is organized smartly and craftfully. I love the fact that there isn't bloat and it's very easy to get through this book in no time at all. Does that mean you aren't getting your money's worth with this book??? HELLS NO!!
If you want to improve your Javascript developing skillset you owe it to yourself to pick up this book, it's one of the best books on the market in this subject matter.
***** HIGHLY RECOMMENDED
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9 of 10 people found the following review helpful:
The book itself has its good and bad parts, August 24, 2008
This review is from: JavaScript: The Good Parts (Paperback)
I bought this book after reading a lot of articles by Douglas Crockford. While the book has very interesting parts and explain in depth things that you take for granted it also has some non-interesting (chapter 8: around 15 pages of "standard methods in standard types" including string.charAt, string.concat, and a lot more).
While I liked the book, I think it was 'filled' with this juiceless chapter because it was already too short (around 145 pages).
I think reading Douglas online is a better deal! See: http://www.crockford.com/
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6 of 6 people found the following review helpful:
Second best book on JavaScript, October 26, 2008
This review is from: JavaScript: The Good Parts (Paperback)
This is an excellent book, as it concisely illustrates a number of details that would be impossible to find in other books. Moderate/advanced JavaScript programmers will gain the most from this book, it is not particularly geared towards the beginner.
The book has a very specific focus, so do not be deceived into thinking this book covers the entire language. For information like that, Flanagan's JavaScript The Definitive Guide will be better. This book, however, is an excellent discussion of the important features of the language. Highly recommended.
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6 of 6 people found the following review helpful:
Excellent way to become fluent in Javascript., October 10, 2008
This review is from: JavaScript: The Good Parts (Paperback)
I decided to pick up this book because I had been using Javascript for years as a "garnish" on top of my web development, but usually only in the form of a few hacked-together utility functions and edited scripts. In truth, I was afraid of the language - it appeared to be a very inconsistent, buggy system that took arcane knowledge to master across browsers. After starting to work with a number of JS frameworks, I knew I needed to confront the language and learn it properly.
This book is possibly one of the best technical/programming related books I have had the pleasure of reading. It doesn't try to be a massive encyclopedic volume like most of my other technical books, so I didn't have to devote countless hours and days pushing through lengthy filler. Every section contains brief information about the most critical parts of Javascript you need to begin coding what you need right away in a tidy object-oriented fashion. If you have experience with any other C-based language and understand general OOP concepts, this book will make you fluent in Javascript with the least amount of time and effort on your part!
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