How to get domain from email

Question

How do I get the domain from an email-adress in ruby?

Answer 1

    >>  email = "Sahil Grover"        
    => "Sahil Grover"

    >> mail = Mail::Address.new(email)         
    => #| >

    >> mail.instance_values        
    => {"output_type"=>:decode,
       "parsed"=>true,
     "data"=>#,
     "display_name"=>"Sahil Grover"}

    >> mail.domain        
    => "stackoverflow.com"