From: Gary Wright <gwtmp01@...>
Date: 2010-02-05T09:08:41+09:00
Subject: Re: Can Ruby Do This?


On Feb 4, 2010, at 5:58 PM, Mr Bubb wrote:

> In Perl, you can create a hash of arbitrary depth like so:
> 
> $hash->{foo}->{bar}->{baz} = 123;

It is a bit tricky because you have to specify a default
proc that refers to itself (to get the infinite depth):

>> default = lambda { |h,k| h[k] = Hash.new(&default) }
=> #<Proc:0x01224e20@(irb):3>
>> top = Hash.new(&default)
=> {}
>> 
?> top[0][1][2][3] = 4
=> 4
>> 
?> p top
{0=>{1=>{2=>{3=>4}}}}
=> nil



Gary Wright