Comments about O'Reilly Media Learning Flex 4:

The book starts with a good introduction, where he leads the reader to know a little of the Flash Plataform, explaining clearly the differences between Flex for Web and Desktop, making a good introduction to the development environment. At this point, the developer who is starting in Flex already feels comfortable with his new tool.

In their sequence, the authors explains in very straightforward and clear the fundamentals of the ActionScript language, the way of spreading events. At that moment I felt a missing of explanation a bit more detail about the construction of custom events.

At the DataBinding there was a very detailed explanation with several examples, including about two-way databinding, however, some details have not been addressed, and generate many questions to the developer, for example, binding between a text field and a numeric attribute in an model.

The authors make a sequence of chapters designed to create forms with navigation controls, where they can be implemented include the validations, formatters, restrictions, with clear examples of how it can be done to implement each of these situations.

It was also made an explanation on the use of States, which suffered a major change in the Flex 4 SDK. The use of states has not been much explored by the authors, but for beginners in the new SDK is helpful explanation.

The book also shows techniques for creating Styles and Skinning in Flex applications. The book makes a very interesting explanation on the implementation of FXG and its use in Skinning.

The book is detailed enough for the most part, with clear examples for learning. I consider the book suitable for those who are starting the Flex development, and also for developers who are starting their studies in the Flex 4 SDK.

Here is the statement my all to the book, surely you can help your learning of technology if you are already a Flex developer, and certainly is of great help to those who are starting their journey.

Congratulations to the authors and Oreilly by excellent edition of the book.

I received access to an electronic copy of this book at no charge from O'Reilly Media Inc. for the purpose of writing this review

Regards

Comments about O'Reilly Media Learning Flex 4:

"Learning Flex 4" explains all of the core concepts for developing Flex 4 applications. It is definitely a beginners book as it assumes only some basic programming knowledge, and the book doesn't really go much beyond the basics of writing a simple Flex application.

The book is well written and uses many examples to explain the core concepts of Flex application development. The book would be a good resource for someone completely new to Flex development and ActionScript, but it lacks depth for someone who already has a decent understanding of Flex development. The book also seemed to be rather wordy, and it took a while to get through even already understanding the majority of the content. Overall, I don't think this book is worth the money because it spends all of its time explaining the most basic level concepts of Flex development. Adobe has already put together great documentation and training materials on their website (see link below). I highly recommend these materials (which are free) over purchasing this book which contains pretty much the same content.

Comments about O'Reilly Media Learning Flex 4:

I have used Flex for some time now, and this book opened my eyes to a whole new side of Flex. It is full of tips and tricks that have increased my productivity, shown me some real world examples that have broadened my horizons, and helped me to understand object-oriented programming concepts much better. Even if you are not an advanced user, this book has great hands-on exercises that will help you understand the basics of Flex and bring you to the next level. Also, this book introduces you to some great free tools to use to create your FXG graphics online.