Ruby: merge nested hash

Question

I would like to merge a nested hash.

a = {:book=>
    [{:title=>\"Hamlet\",
      :author=>\"William Shakespeare\"
      }]}

b = {:book=>
    [{         


        

Answer 1

I found a more generic deep-merge algorithm here, and used it like so:

class ::Hash
    def deep_merge(second)
        merger = proc { |key, v1, v2| Hash === v1 && Hash === v2 ? v1.merge(v2, &merger) : v2 }
        self.merge(second, &merger)
    end
end

a.deep_merge(b)