Sinatra Description
Sinatra has a number built-in settings which control the activation of certain features. The settings object is a request context object that contains application-level variables. These variables can be modified by using the set, disable, or enable methods. Applications can set their own custom settings, as well as default built-in framework settings. In its simplest form the set method creates an application attribute by taking a setting value and name. Extensions provide helper methods or class methods to Sinatra applications. These methods are usually listed and described in the extension home pages. Installing a gem, library or a file is all that's needed to use an extension.