From: Joel VanderWerf <vjoel@...>
Date: 2003-10-03T23:37:04+09:00
Subject: Re: hash of hashes

Paul Argentoff wrote:
...
> I need something like this:
> 
> a = {{}} # this doesn't work, but i've just written it here to emph. the
>          # subject
> ...
> # somewhere in the iteration
> a[foo][bar] = baz
> ...

hash_maker = proc do |h, k|
   h[k] = Hash.new(&hash_maker)
end

h = Hash.new(&hash_maker)

h[1][2][3][4][5] = 6

p h   # {1=>{2=>{3=>{4=>{5=>6}}}}}