From: acmeman1@...
Date: 2007-08-21T00:00:02+09:00
Subject: How to implement a hash whose key is another hash?

I understand that the key of a hash can be any object. Therefore,
I would think that the key of a hash can be another hash.  If I have
the following code sequence. (I using ruby 1.8.5 (2006-08-25) [i486-
linux])


require 'pp'
test ={}
test["new"=>"girl"]= 100
test["new"=>"girl"]= 200
pp test

I am expecting the output to be

{{"new"=>"girl"}=>200}

However the output I am getting is

{{"new"=>"girl"}=>100,
 {"new"=>"girl"}=>200}

Could some explain how to use hash key which is of type hash