From: Sylvain Joyeux <sylvain.joyeux@...>
Date: 2007-06-12T15:49:34+09:00
Subject: Re: how to make a[2][2][3]=4 work?

def recursive_hash
  Hash.new { |h, k| h[k] = recursive_hash }
end
a = recursive_hash

Or even

class Hash
  def self.recursive
    new { |h, k| h[k] = recursive }
  end
end

which gives

>> a = Hash.recursive
=>
>> a[1][2][3][4] = 1
=> 1
>> puts a.inspect
{1=>{2=>{3=>{4=>1}}}}

-- 
Sylvain Joyeux