Find nested values within a hash

Hash-find_deep.rb

  #find arbitrairly deep value based on keys
  # {:a=> {:b=> {:c => 'C'}}}.find_deep(:a, :b, :c) #=> 'C'
class Hash
  def find_deep(*keys)
    find_deep_iter(self, keys)
  end

  def find_deep_iter(h, keys)
    return h if keys.empty?
    if h.respond_to? :keys
      find_deep_iter(h[keys.shift], keys)
    else #h isn't hash-like
      keys.empty? ? h : nil
    end
  end
end