Hash#dig

gistfile1.txt

class Hash
  # Accessing deep hash values. For example, given this hash:
  #   h = {:a => {:b => :c}}
  #   h.dig(:a, :b)
  #   => :c
  #   h.dig(:x, :y, :z)
  #   => nil
  def dig(*path)
    first, tail = path[0], path[1..-1]
    node = self[first]
    if tail.size > 0
      node.is_a?(Hash) ? node.dig(*tail) : nil
    else
      node
    end
  end
end