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You can use Fixtures in Rai...
Setup your development environment.
Configure your production server.
Learn how to modify production to run websockets.
Learn how to add @mentions, autocomplete, notifications, and link parsing
Rails Assets makes it super easy to use the latest versions of frontend libraries
Separate responsibilities of Javacsript from your HTML tags by using the data-behavior attribute
Learn how oEmbed works to dynamically grab embed codes from a URL and how we can use fragment caching to make this more efficient
An advanced look into jQuery UJS and how to use callbacks to improve your UJS workflow and debugging
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