How can I compare two objects and get true if some of his atributes are
equals ?

I need to compare two arrays of users, and get and third array just with
the matches. I found the "&" method that work for Fixnuns and String,
but...how to use with objects ?


class User
 attr_accessor :email
end

a = User.new
a.email = 'ruby / rails.com'

b = User.new
b.email = 'ruby / rails.com'

array_one = [a]
array_two = [b]


array_three = array_one & array_two

puts array_three # I want the user here



Can you help me ?
thanks
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