Quick look at hash nesting

hashes_and_such.rb

hash  = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) }

hash["down"]["in-the"]["basement"] = "hello?"
hash
# => {"down"=>{"in-the"=>{"basement"=>"hello?"}}} 

hash.has_key?("i-do-not")
# => false 

hash.default = lambda{|h,k| h[k] = "bankai!" } # no longer a deeply nested/fun hash
hash["not"]["nested"] = ":("
# NoMethodError: undefined method `[]=' for #<Proc:0x00000101b44888@(irb):69 (lambda)>

hash["dang"] = "I get it"
hash
# => {"down"=>{"in-the"=>{"basement"=>"hello?"}}, "dang"=>"I get it"}

Maybe add Hash#nested to lib that makes a blank new hash with this functionality?