No Keys, nor other hash methods on multidimensional hash - comp.lang.ruby

Message from discussion No Keys, nor other hash methods on multidimensional hash
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From: Xeno Campanoli <x...@eskimo.com>
Newsgroups: comp.lang.ruby
Subject: No Keys, nor other hash methods on multidimensional hash
Date: Tue, 23 Aug 2005 04:14:16 +0900
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Okay, I'm taking the example I got last week for multi-dimensional hashes, and
I don't have access to any Hash methods:

pHash = lambda { Hash.new {|h,k| h[k] = pHash.call }
pHash['1']['a'] = "one"
p pHash.keys

I run this and get the result:

..undefined method `keys' for ... (NoMethodError)

Do I need to dereference or something, or is this just something that doesn't
work after all?

Sincerely, Xeno Campanoli, Ruby neophyte and general paraphernalian.