Ruby hash with js object-like syntax

fancyhash.rb

# Nesting would not work here but could easily be tweaked to do so
# other hash methods that return a copy (eg #merge) also need to be reimplemented
# OpenStruct already does this too btw

class HashObj < SimpleDelegator

  def method_missing(method_name, *args, &block)
    if __getobj__.keys.include?(method_name)
      puts "looking for #{method_name}"
      __getobj__[method_name]
    else
      super
    end
  end
end

ho = HashObj.new({a: 1, b: 2})
ho.a
# => 1
ho.b
# => 2
ho.c
# => NoMethodError: undefined method `c' for {:a=>1, :b=>2}:HashObj