Workaround for multiple regex patterns against a variable parameter segment in a url mapping in Goliath

gistfile1.rb

class RackRoutes < Goliath::API

  get '/item/:value/description' do
    if params[:value].match /^[a-zA-Z][\w\-]+$/
      ...do awesome stuff with a parameter that is alpha-based...
    elsif params[:value].match /\d+/
      ...do awesome stuff with a parameter that is numeric-based...
    else
      run Proc.new { |env| [404, {}, "" ] }
    end
  end

end