From: Robert Klemme <shortcutter@...>
Date: 2009-06-19T23:35:04+09:00
Subject: Re: hash of hash?

2009/6/19 Florian Weingarten <usenet@hackvalue.de>:
> Jeroen Lodewijks <ruby-forum@wondercool.com> wrote:
>> class Hashhash
>> ...
>> end
>>
>> out = ah["T"][9]
>> ...
>> test.rb:5: undefined method `[]' for #<Hashhash:0x2bd2e30>
>
> Hi Jeroen,
>
> I think you have to explicitly define a [] method for your class
> (and a []= method, if you want to write values with this syntax too).

Alternatively Jeroen can simply create a Hash with a default_proc
which will recursively insert Hashes:

irb(main):001:0> ha = Hash.new {|h,k| h[k] = Hash.new(&h.default_proc)}
=> {}
irb(main):002:0> ha[1][2][3]
=> {}
irb(main):003:0> ha[1][2][3]=123
=> 123
irb(main):004:0> ha
=> {1=>{2=>{3=>123}}}
irb(main):005:0>

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/