class OneTimeContainer
def initialize(value)
@use_just_once_then_destroy = value
end
def get_value
remove_instance_variable(:@use_just_once_then_destroy)
end
end
object_1 = OneTimeContainer.new(6)
object_1.get_value
# => 6
object_1.get_value
# NameError: instance variable @use_just_once_then_destroy not defined
object_2 = OneTimeContainer.new('ephemeron')
object_2.get_value
# => "ephemeron"
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