Nested Hashes with Symbols

nested_hashes.rb

#/usr/bin/env ruby

silicates = Hash.new {
  |h, k| h[k] = Hash.new
}

silicates[:mineral0]["ruby"] = "String + red"
silicates[:mineral1]["ruby"] = "String + blue"
silicates[:mineral2][:ruby]  = "Symbol + green"
silicates[:mineral3][:ruby]  = "Symbol + black"

silicates.each_pair { |key, value|
  value.each { |key, value|
    puts value + " : " + key.object_id.to_s
  }
}