class StoreAndCall
  
  def initialize(&lambda)
    @lambda = lambda # store lambda in instance var, for use in foo
  end
  
  def foo
    @lambda.call 'foo' # retrieve lambda from instance var, and pass it 'foo'
  end
  
end

local_var = 'bar'

my_object = StoreAndCall.new { |param| puts "#{param} #{local_var}" }

my_object.foo

foo bar