Extjs4 First Look Review

A really great resource when migrating to Extjs4, and to anyone new to Extjs in general this would be a great place to start. As a pre-release reviewer of this book I can tell you there's stuff in there at the time of reading wasn't readily available on the web. I recommend this when developing in Extjs4 for newbies as it compact a lot of highly useful information into one place.

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