gets all values from a hash no matter how nester

deep_values.rb

def deep_values(h, acc = [])
    return [nil] if h.nil?
    case h
    when Hash
      return deep_values(h.values)
    when Array
      acc.push(*h.map { |v| deep_values(v) })
    else
      acc.push(h)
    end
    acc.flatten
end