hmm.rb

data = 3

def gimme_that_data
  data
end

p data

# in `gimme_that_data': undefined local variable or method `data' for main:Object (NameError)
#p gimme_that_data

pleeze_gimme = lambda do
  data
end

p pleeze_gimme.call

def more_gimmie(&block)
  yield
end

p more_gimmie { data }


self.class.send(:define_method, :ooh_this_works) do
  data
end

p ooh_this_works

define_singleton_method(:this_too) { data }
p this_too