11 lines
272 B
Ruby
11 lines
272 B
Ruby
class BuyXGetOneFreeDiscount
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def initialize(unit_price:, trigger_quantity: 2)
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@unit_price = unit_price
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@trigger_quantity = trigger_quantity.to_f
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end
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def discount_for_quantity(quantity)
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return (quantity / @trigger_quantity).floor * @unit_price
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end
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end
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