How do I use the fetch method for nested hash?

Question

I have the following hash:

hash = {\'name\' => { \'Mike\' => { \'age\' => 10, \'gender\' => \'m\' } } }

I can access the age by:

Answer 1

There is no built-in method that I know of. I have this in my current project

class Hash
  def fetch_path(*parts)
    parts.reduce(self) do |memo, key|
      memo[key.to_s] if memo
    end
  end
end

# usage
hash.fetch_path('name', 'Mike', 'age')

You can easily modify it to use #fetch instead of #[] (if you so wish).