Ruby: how to make a Hash from path more robust?

Question

Assuming some hashes in the array only have path ab or {"a"=>{"b"=>"someanswer"}} , how do I make the below code robust enough to display the last element without dieing?

path = ("a.b.c.d")
arrayOfHashes.collect {|hash| path.split(".").inject(hash) { |hash, key| hash[key] }}

Answer 1

The specifications are not complete. Something like that?

arrayOfHashes = [{"a" => {"b" => "hello"}}, {"a" => {"b" => {"c" => {"d" => "response"}}}}]
path = "a.b.c.d"
arrayOfHashes.map do |hash| 
  path.split(".").inject(hash) do |acc, key|
    acc.is_a?(Hash) ? acc[key] : acc
  end
end
#=> ["hello", "response"]