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| def addItem(newItem: BasketItem): BasketState = { | |
| copy( | |
| items.foldRight((false, List.empty[BasketItem])) { | |
| case (item, (_, out)) if (item.matchesProductAndSizeOf(newItem)) ⇒ (true, item.incrementNumberBy(newItem.numberOfProducts) :: out) | |
| case (item, (didSomethingMatch, out)) ⇒ (didSomethingMatch, item :: out) | |
| } match { | |
| case (false, _) ⇒ newItem :: items | |
| case (true, modifiedItems) ⇒ modifiedItems | |
| } | |
| ) | |
| } |
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| case class BasketState(items: List[BasketItem] = Nil) { | |
| def addItem(newItem: BasketItem): BasketState = { | |
| // if (items.exists(item ⇒ item.productNumber == newItem.productNumber && item.sizeCode == newItem.sizeCode)) { | |
| // copy( | |
| // items.map { item ⇒ | |
| // if (item.productNumber == newItem.productNumber && item.sizeCode == newItem.sizeCode) | |
| // item.copy(numberOfProducts = item.numberOfProducts + 1) | |
| // else item | |
| // } | |
| // ) | |
| // } else { | |
| // copy(newItem :: items) | |
| // } | |
| // copy( | |
| // items.foldRight((false, List.empty[BasketItem])) { (item, out) ⇒ | |
| // if (item.productNumber == newItem.productNumber && item.sizeCode == newItem.sizeCode) | |
| // (true, item.copy(numberOfProducts = item.numberOfProducts + 1) :: out._2) | |
| // else (false, item :: out._2) | |
| // } match { | |
| // case (false, _) ⇒ newItem :: items | |
| // case (true, modifiedItems) ⇒ modifiedItems | |
| // } | |
| // ) | |
| copy( | |
| items.foldRight((false, List.empty[BasketItem])) { | |
| case (item, (_, out)) if (item.productNumber == newItem.productNumber && item.sizeCode == newItem.sizeCode) ⇒ (true, item.copy(numberOfProducts = item.numberOfProducts + newItem.numberOfProducts) :: out) | |
| case (item, (bool, out)) ⇒ (bool, item :: out) | |
| } match { | |
| case (false, _) ⇒ newItem :: items | |
| case (true, modifiedItems) ⇒ modifiedItems | |
| } | |
| ) | |
| // copy( | |
| // items.foldRight((false, List.empty[BasketItem])) { | |
| // case (BasketItem(newItem.productNumber, newItem.sizeCode, numberOfProducts, product), (_, out)) ⇒ (true, BasketItem(newItem.productNumber, newItem.sizeCode, numberOfProducts + newItem.numberOfProducts, product) :: out) | |
| // case (item, (bool, out)) ⇒ (bool, item :: out) | |
| // } match { | |
| // case (false, _) ⇒ newItem :: items | |
| // case (true, modifiedItems) ⇒ modifiedItems | |
| // } | |
| // ) | |
| } | |
| } |
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