Collections Ruby

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require 'forwardable'
class RandomAccessHash
  extend Forwardable
  def initialize
    @delegate_to = {}
  end
  def_delegators :@delegate_to, :[], "[]="
end
ra = RandomAccessHash.new
ra["A"] = 4.60
ra["B"] = 1.94
ra["C"] = 2.01
puts ra["D"]