gist: 1410


  
    
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                def has_permission(name)
    (p = permissions.detect{|p| p[:name] == name } ) ? p[:active] : false
  end
 
  def has_one_of_permissions(ps)
    ps = [ps].flatten
    ps.each do |p|
      return true if has_permission(p)
    end
    false
  end