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

A version that uses a method instead of adding to the Hash class for others using Ruby 2.2 or lower.

def dig(dict, *args)
  key = args.shift
  if args.empty?
    return dict[key]
  else
    dig(dict[key], *args)
  end
end

And so you can do:

data = { a: 1, b: {c: 2}}
dig(data, :a) == 1
dig(data, :b, :c) == 2