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flash[:notice] = "You can stop rolling your own now." Simple flash hash implementation for Rack apps. Try it out here: flash.patnakajima.net. Usage Here’s how to use it. Vanilla Rack apps You can access flash entries via env['rack-flash']. You can treat it either like a regular flash hash: use Rack::Flash # Set a flash entry env['rack-flash']['notice'] = 'You have logged out.' # Get a fla