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marioaquino/immutable_ruby1.rb

Created March 18, 2013 02:08
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Partially immutability in object construction in Ruby.
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immutable_ruby1.rb
class Profile
def initialize(email)
self.class.send :define_method, :email, -> { email }
end
end
p = Profile.new '[email protected]'
p.email #=> '[email protected]'
p.email = '[email protected]' #=> <boom>
p.instance_variable_set :@email, '[email protected]'
p.email #=> '[email protected]'
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