Flowdock
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Importance_1
Ruby on Rails latest stable (v3.2.13) - 0 notes - Superclass: Object
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  • What's this?

Class deprecated or moved

This class is deprecated or moved on the latest stable version. The last existing version (v2.3.2) is shown here.

Rack::Builder implements a small DSL to iteratively construct Rack applications.

Example: 

 app = Rack::Builder.new {
   use Rack::CommonLogger
   use Rack::ShowExceptions
   map "/lobster" do
     use Rack::Lint
     run Rack::Lobster.new
   end
 }

Or 

 app = Rack::Builder.app do
   use Rack::CommonLogger
   lambda { |env| [200, {'Content-Type' => 'text/plain'}, 'OK'] }
 end

use adds a middleware to the stack, run dispatches to an application. You can use map to construct a Rack::URLMap in a convenient way.

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