Ruby on Rails

Hi,

  i want to capture a obj.errors value into a new hash for example

a = Hash.new
obj.errors = { :a => "can't be blank" , :b =>"should be alphanumeric" ,:c => "Not in the list"}
a   << {0 , obj.errors}
end

 it says error like that  

undefined method `<<' for {}:Hash

pls what i miss in this syntax

 thanks in advance

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