IndifferentString - like HashWithIndifferentAccess

IndifferentString.rb

class IndifferentString < String
  def initialize(val)
    # NOTE: would it be better to raise a TypeError if val isnt string or symbol?
    #       or is it okay to duck type here?
    super(val.to_s)
  end
  
  def ==(other_object)
    self.to_sym == other_object.to_sym
  end
end