Ruby on Rails has this nice things called layouts. They allow you to change what your users can see on every page of your website.
Things like:
Menus
CSS / Javascript
Footer
This is important to understand if you want to build web applications.
In this video:
You'll learn the basics of layouts on Rails with a quick demonstration, then you'll discover how you can show or hide certain sections of your layout.
Based on a condition, like the current action name, or the current controller name.
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