From: Jeroen Lodewijks <ruby-forum@...>
Date: 2009-06-19T23:08:12+09:00
Subject: hash of hash?

hi,

I am totally new to Ruby and am trying to code a hash of a hash.
Somehow I always get a syntax error, but am unable to resolve it.

This is what I have:

File 1:
class Hashhash
   def initialize
     @dt = { 2 => {2 => "H", 3 => "C"},
             3 => {2 => "H", 9 => "Dh"},
            "T" => {2 => "C", 9 => "S"}
     }

     return @dt
  end
end

File 2:
require 'Hashhash'

ah = Hashhash.new

out = ah["T"][9]

p out

I always get this error:
test.rb:5: undefined method `[]' for #<Hashhash:0x2bd2e30>
(NoMethodError)

But when I try to code something in irb it works:
irb(main):006:0* dt = { 2 => {2 => "H", 3 => "C"}}
=> {2=>{2=>"H", 3=>"C"}}
irb(main):007:0> puts dt[2][2]
H
=> nil

What am I doing wrong??

Thanks in advance
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