I swear there's a use for these.

hash_decompose.rb

class Hash
  def decompose
    each_pair.each_with_index.each_with_object([{},{}]) { |((k,v), i), (f, s)| f[k], s[i] = i, v }
  end
  def decompose_to_a
    each_pair.each_with_index.each_with_object([{},[]]) { |((k,v), i), (f, s)| f[k], s[i] = i, v }
  end
end

{:a => "hello", :b => "world"}.decompose
#=> [{:a=>0, :b=>1}, {0=>"hello", 1=>"world"}]

{name: "John J", email: "[email protected]"}.decompose
#=> [{:name=>0, :email=>1}, {0=>"John J", 1=>"[email protected]"}]

{name: "John J", email: "[email protected]"}.decompose_to_a
#=> [{:name=>0, :email=>1}, ["John J", "[email protected]"]]