>> x = EmailAddress.find(1)
=> #<EmailAddress:0x3714938 @attributes={"name"=>nil, "updated_at"=>"2007-06-08 16:18:44", "crypt"=>"d4bf5ca873b0f2c030e8f5be74d92e33", "id"=>"1", "address"=>"eunji@deeptechinc.com", "created_at"=>"2007-06-08 16:18:44"}>
>> y = EmailAddress.find(1)
=> #<EmailAddress:0x37110e4 @attributes={"name"=>nil, "updated_at"=>"2007-06-08 16:18:44", "crypt"=>"d4bf5ca873b0f2c030e8f5be74d92e33", "id"=>"1", "address"=>"eunji@deeptechinc.com", "created_at"=>"2007-06-08 16:18:44"}>
>> a = [x, y]
=> [#<EmailAddress:0x3714938 @attributes={"name"=>nil, "updated_at"=>"2007-06-08 16:18:44", "crypt"=>"d4bf5ca873b0f2c030e8f5be74d92e33", "id"=>"1", "address"=>"eunji@deeptechinc.com", "created_at"=>"2007-06-08 16:18:44"}>, #<EmailAddress:0x37110e4 @attributes={"name"=>nil, "updated_at"=>"2007-06-08 16:18:44", "crypt"=>"d4bf5ca873b0f2c030e8f5be74d92e33", "id"=>"1", "address"=>"eunji@deeptechinc.com", "created_at"=>"2007-06-08 16:18:44"}>]
>> a
=> [#<EmailAddress:0x3714938 @attributes={"name"=>nil, "updated_at"=>"2007-06-08 16:18:44", "crypt"=>"d4bf5ca873b0f2c030e8f5be74d92e33", "id"=>"1", "address"=>"eunji@deeptechinc.com", "created_at"=>"2007-06-08 16:18:44"}>, #<EmailAddress:0x37110e4 @attributes={"name"=>nil, "updated_at"=>"2007-06-08 16:18:44", "crypt"=>"d4bf5ca873b0f2c030e8f5be74d92e33", "id"=>"1", "address"=>"eunji@deeptechinc.com", "created_at"=>"2007-06-08 16:18:44"}>]
>> a.uniq
=> [#<EmailAddress:0x3714938 @attributes={"name"=>nil, "updated_at"=>"2007-06-08 16:18:44", "crypt"=>"d4bf5ca873b0f2c030e8f5be74d92e33", "id"=>"1", "address"=>"eunji@deeptechinc.com", "created_at"=>"2007-06-08 16:18:44"}>, #<EmailAddress:0x37110e4 @attributes={"name"=>nil, "updated_at"=>"2007-06-08 16:18:44", "crypt"=>"d4bf5ca873b0f2c030e8f5be74d92e33", "id"=>"1", "address"=>"eunji@deeptechinc.com", "created_at"=>"2007-06-08 16:18:44"}>]
>>