Ruby Hash dig

hash_dig.rb

# FROM http://stackoverflow.com/a/1820492/1186789
#
# Example:
#
# h = { a: { b: { c: 1, d: 2 } } }
# h.dig(:a, :b, :c) == 1
# h.dig(:a, :b) == { c: 1, d: 2 }
# h.dig(:x, :y, :z) == nil

class Hash
  def dig(*path)
    path.inject(self) do |location, key|
      location.respond_to?(:keys) ? location[key] : nil
    end
  end
end