RosettaCodeData/Task/Add-a-variable-to-a-class-instance-at-runtime/Falcon/add-a-variable-to-a-class-instance-at-runtime-3.falcon

function sub_func( value )
  self['prop'] -= value
  return self.prop
end

dict = bless( [
  'prop' => 0,
  'add' => function ( value )
    self.prop += value
    return self.prop
  end ,
  'sub' => sub_func
])

dict[ 'newVar' ] = "I'm Rich In Data"