December 2008
Intermediate to advanced
360 pages
8h 21m
English
book
Flex on Rails: Building Rich Internet Applications with Adobe Flex 3 and Rails 2
by Tony Hillerson, Daniel Wanja
Content preview from Flex on Rails: Building Rich Internet Applications with Adobe Flex 3 and Rails 2
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14 Using Observers to Clean Up Code
Goal
You’d like to decrease the dependency certain parts of your application have on other parts of it to keep things flexible and clean, especially when you need to take action in one part of your application when something in another part changes.
Solution
In Flex, use binding tags, BindingUtils and ChangeWatchers, to be notified when state changes occur in another part of the application.
In Rails, use the ActiveRecord lifecycle methods and observers to take action when certain events take place on your models.
BindingUtils and ChangeWatchers in Flex
As you’ve gone through this book and seen how powerful and useful Flex’s binding syntax is for cleaning up your code, you may have ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.