Come ottenere il dominio dall'e-mail

Question

Come si ottiene il dominio da un indirizzo di posta elettronica in ruby?

Answer 1

>> "hey@mycorp.com".split("@").last 
=> "mycorp.com" 

Answer 2

Se si preferisce usare una libreria dedicata alla comprensione di queste cose:

→ irb -rmail 
ruby-1.9.2-p0 > Mail::Address.new('feep+wibble@example.com').domain 
=> "example.com" 

Answer 3

>> email = "Sahil Grover<sahil+test@stackoverflow.com>"   
    => "Sahil Grover<sahil+test@stackoverflow.com>" 

    >> mail = Mail::Address.new(email)   
    => #<Mail::Address:75152940 Address: |Sahil Grover <sahil+test@stackoverflow.com>| > 

    >> mail.instance_values   
    => {"output_type"=>:decode, 
     "parsed"=>true, 
    "data"=>#<struct Mail::Parsers::AddressStruct 
    raw="Sahil Grover<sahil+test@stackoverflow.com>", 
    domain="stackoverflow.com", 
    comments=[], 
    local="sahil+test", 
    obs_domain_list=nil, 
    display_name="Sahil Grover", 
    group=nil, 
    error=nil>, 
    "display_name"=>"Sahil Grover"} 

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