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Pro JavaScript Techniques (Inglese) Copertina flessibile – 10 ott 2008

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4,1 su 5 stelle 34 recensioni clienti su Amazon.com

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Descrizione prodotto

L'autore

John Resig is a programmer and entrepreneur who's been developing web applications for over eight years. Having primarily focused on back-end development for most of that time using Perl and MySQL, John changed his focus toward implementing usable web front ends. He holds a degree in computer science from Rochester Institute of Technology in New York, and has published several papers on data mining instant messaging networks. When he's not programming, he enjoys watching movies, writing in his blog, www.ejohn.org, and spending time with his girlfriend.

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Amazon.com: 4.1 su 5 stelle 34 recensioni
2 di 2 persone hanno trovato utile la seguente recensione
4.0 su 5 stelle Good for the basics 28 settembre 2012
Di Chris P. Wood - Pubblicato su Amazon.com
Formato: Copertina flessibile Acquisto verificato
Although slightly dated, Resig's Pro Javascript Techniques does an excellent job explaining many of the basic building blocks of modern javascript libraries: DOM interaction, code minimization techniques, debugging tools, rich interactivity with timed behavior, and basic AJAX techniques for non-blocking server access. This is a very helpful book for anyone wanting a quick and basic overview.

That said, this book, given its date, does not spend much time covering closures, execution context (e.g. this), and the Object prototypal chain which have today become pre-requisites for OO design techniques such as encapsulation and inheritance. If you are looking for the truly advanced javascript techniques, don't look here. Because of that, I'm expecting (and hoping) that Resig's next work (Secrets of the Javascript Ninja) will provide a more thorough treatment of the subject.
11 di 11 persone hanno trovato utile la seguente recensione
5.0 su 5 stelle Ready for Level 2? 19 gennaio 2008
Di Andrew - Pubblicato su Amazon.com
Formato: Copertina flessibile Acquisto verificato
After writing disorganized (yet effective) JavaScript functions for seven years, I really wanted to get more out of the language. I wanted to code more efficiently. As each new project started, I found myself scurrying to find old functions strewn across different computers or servers. Even when I found this code, I would often need to make some significant changes to it.

So, I did what any self-taught front-end developer would do: I hit the online tutorials. Online tutorials didn't really do it for me, though. The good tutorials seemed too short, and I kept reverting back to sloppy coding after a few days.

Then I came across this book.

The examples are excellent in demonstrating how the language can really work for you if you're willing to put the time into it. That being said, this book is not for beginners. This book is probably best for three groups of people:

1) Intermediate JavaScript developers who are ready to finally adopt code reuse and reap the nice things a loosely typed, object-based language can give you.

2) Java/C++ programmers who need to pick up JavaScript for a project. These people are already familiar with OO concepts and will probably have an easier time learning the language from a book like this.

3) Ambitious beginners with a lot of patience.

After only 3 chapters, I started to think about JavaScript in a different way. For the first time ever, I found myself reusing code with little to no change required. My code was easier to read, too.

I'm a big proponent of activities that give back the time you invest. Bad books don't do this. Good ones, like this book, do.
7 di 7 persone hanno trovato utile la seguente recensione
3.0 su 5 stelle Should have been much better 10 gennaio 2010
Di Customer - Pubblicato su Amazon.com
Formato: Copertina flessibile Acquisto verificato
While John Resig clearly understands javaScript very well, he doesn't put as much effort into writing about it. This book starts out well, but mistakes and unclear explanations take over after the second chapter. The problems in the case studies toward the end of the book are even more frustrating than the typos. As someone else already said "if you can debug the mistakes, you don't need the book." Especially troublesome to me is the lack of support from the publisher, no errata and the code downloads are incorrect ( at least some of them don't even function). The book is not a write off, there is very valuable information and advice. I just am very disappointed in the code examples and their explanations. In addition the book evangelizes OOP, but the examples are all procedural causing even further confusion. Because of the problems I have with the book, I am slightly surprised by the number of 4 and 5 star reviews. Maybe not everyone will be as disappointed as I am.
6 di 6 persone hanno trovato utile la seguente recensione
4.0 su 5 stelle Finally, a JavaScript resource aimed at me 30 aprile 2008
Di Kevin Major - Pubblicato su Amazon.com
Formato: Copertina flessibile Acquisto verificato
Pro JavaScript Techniques by John Resig is probably the best resource on the language I've encountered to date. I'm one of those web developers who has had something of a mental block when it comes to JavaScript. Despite its ubiquity, it always seemed like a toy language to me. It didn't help that JavaScript's syntax plays a bit fast and loose to my tastes, and that virtually all of the other resources on the language I've encountered barely scratched the surface on what the language can actually do. If you're like me - familiar with the basics, but knowing that you're not proficient enough to use it in a professional setting - then this book is for you.

First, the bad news. Like all aPress books I've encountered, this one suffers from a few small, but glaring, editing errors. Small things - variable names that change between examples for no good reason, in-text refrences to things the author didn't mention (no doubt something missed between drafts), that sort of thing - crop up. It's not enough to break the book, but it is annoying.

Also, the first section of the book moves at break-neck speed. While some of it is review, for those of us who have been toiling in web tutorials and older books, a few re-reads are necessary to truly understand what's going on. Thankfully, Resig addresses things in a logical manner, so each topic flows nicely into the next, making returning to those parts as painless as possible.

Finally, in the chapter where he discusses public, private, and privledged object properties and methods, he completely glosses over how private properties and methods function. Instead, he merely tells the user to visit Douglas Crockford's site on the matter. It's a bit of a cop-out, and I figure that since I'm spending ~$30 on the book, the least he can do is briefly condence Crockford's ideas.

All that said, though, the positives outweigh the negatives by far.

Despite the quick pacing of the book, the information (ignoring editing inconsistencies) is delivered in a straightforward manner. Resig addresses most, if not all, of those little things which are important in the real world (testing/debugging, how to work with libraries, how to ensure your code doesn't interfere with someone else's code, etc), but are often ignored in other resources.

In particular, the early chapters (chapters 2 and 3) on dealing with JavaScript objects are well done. While Resig doesn't go into all of the details (most notably with the link to Crockford's site I mentioned earlier), these chapters form the foundation of just about everything you'd want to do with the language. Indeed, these chapters address most of the pitfalls that create those pesky JavaScript errors we've all dealt with before: scope, closures, and context. Understanding how those three concepts work in unison is fundamental towards understanding modern, professional JavaScript as a whole.

Being a JavaScript book, this particular volume visits topics we're most likely all familiar with: DOM scripting, event handling, and even a bit of AJAX. Thanfully, Resig stays true to his mission of creating inobtrusive JavaScript, and keeps his HTML separated from the scripting code. This is a far cry from other self-proclaimed professional tomes that embed their JavaScript function calls within their HTML tags.

To conclude (and reiterate), Pro JavaScript Techniques is the perfect book for those developers caught in the middle. It's a resource aimed at those of us who have had experience with the language, but have never been pointed in the right direction to use it in a professional manner. Despite its annoying flaws, this book fills the rather large gap between beginner's JavaScripting and creating robust AJAX applications. It's worth owning if you ever want to do serious work with the language.
9 di 9 persone hanno trovato utile la seguente recensione
5.0 su 5 stelle Take your understanding of Javascript to the next level 22 febbraio 2007
Di Nate Klaiber - Pubblicato su Amazon.com
Formato: Copertina flessibile Acquisto verificato
Pro Javascript Techniques by John Resig was a very in depth look at Javascript and its capabilities. I loved this book for the simple fact that the first chapter started by introducing you to objects in Javascript. No time was wasted on the basics, you were diving in deep right from the beginning. Also, even though John is the creator and lead developer of the jQuery Javascript library, this book was not about pushing his framework. He did a great job of introducing many of the different frameworks and listing their strengths and purposes.

The entire book had you building a library of usable scripts that allow for great portability while using Javascript in your applications (or even your personal website). Each chapter discussed the scripts, their functionality, their support, and giving great details to how they worked. Most chapters also gave you examples of the scripts in a working environment. A quick breakdown looks like this:

The first part of the book discussed Object Oriented Javascript. This included information related to creating your own objects and extending the core javascript objects. He then moved on to discussing testing of your code and how to package it for distribution. This is especially helpful for those working in an environment with multiple developers/programmers. Thankfully, he discussed unobtrusive DOM scripting, which still may be new to some developers. The first part closed with discussions related to AJAX and browser support, both of which we would see more of later. All of part one was a brief introduction to what we would read through the rest of the book

Part two discussed Object Orient Javascript in more detail. This included things such as basics of objects, object creation, references, overloading, scope, and closures. I found this chapter to provide a solid foundation for the rest of the chapters to come, as well as very descriptive related to objects. The next few chapters discussed creating reusable code and shined some light on several of the libraries available. Also, we got a glimpse into the wonderful world of debugging javascript and were introduced to some great tools to help you as you build.

Part three dives into unobtrusive Javascript and intricate details related to the DOM and how to manipulate the DOM. Once we learn how to properly manipulate and traverse the DOM, we move on to attaching events to elements. All of this was discussed in light of progressive enhancement and making sure content is always available. The last three chapters of this section discussed Javascript and CSS, how to improve forms (which is also a topic for another discussion), and a practical example of building an image gallery.

Part four pushes ahead to AJAX. The first chapters discussed the history of AJAX and some of its common uses. With a foundation of understanding what AJAX is, the next chapters were spent with practical examples of enhancing your blog (quick access to all posts dynamically on scroll), building an autocomplete search field, and creating an AJAX Wiki. I found that the blog and autocomplete were a little more valuable than the Wiki.

The final part looks to the future of Javascript. This section was very educational as we move forward. This is very important to be aware of what will be available in the near (hopefully) future.

The appendixes were extremely valuable, and I will use it as a quick reference as I begin developing more Javascript. A full listing of the DOM reference, Events reference, and the Browsers.

Overall, this book was an incredible read and is highly recommended for those who want to take their Javascript skills to the next level.