Swift Array Filter Multidimensional Arrays

Question

I am trying to filter out arrays in an array condition

public struct SalesDO: Entity {
   public var ID: String = UUID().uuidString
   public var isDeleted: Bool = false
   public var salesItems = [SalesItemDO]()
}

public struct SalesItemDO: Entity {
   public var ID: String = UUID().uuidString
   public var isDeleted: Bool = false
   public var modifiers = [SalesItemModifierDO]()
}

public struct SalesItemModifierDO: Entity {
   public var ID: String = UUID().uuidString
   public var isDeleted: Bool = false
}

What i am trying to achieve is to filter out those SalesItem which is not deleted, together with the sales item modifiers inside not deleted as well

I try to use the Swift filter array function, but it is compiler error

let rawSales = self.service.getSales(object: SalesDO()) as? SalesDO
if var sales = rawSales {
   let filteredSalesItem = sales.salesItems.filter({$0.modifiers.filter({$0.isDeleted == false})})
}.filter({$0.isDeleted == false})

I also tried this code

// It becomes SalesItemModifierDO array
let filteredsales = sales.salesItems.flatMap({$0.modifiers.filter({$0.wbDeleted == false})}).filter({$0.wbDeleted == false})

For example

Item A is not deleted
   => Modifier 1
   => Modifier 2
   => Modifier 3 : Deleted
Item B is deleted 
   => Modifier 1
   => Modifier 2

I am trying to achieve a function that will only display Item A with only 2 modifiers, because the modifier 3 is already deleted.

Can someone guide on what I am missing? Any help given is highly appreciated. Thanks

Chris · Accepted Answer · 2019-08-16 06:35:10Z

1

You can filter the array to remove sale items that are deleted, then map the remaining ones to remove modifiers where the modifier is deleted.

let filteredSalesItem = sales.salesItems.filter({ !$0.isDeleted }).map { (item) -> SalesItemDO in
    var newItem = item // Need to make mutable interim item to change modifiers array
    newItem.modifiers = newItem.modifiers.filter({ !$0.isDeleted })
    return newItem
}

edited Aug 16, 2019 at 6:35

answered Aug 15, 2019 at 11:17

Chris

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9 Comments

Alvin Over a year ago

Hi Sir, thanks for the reply. The code above is working for filtering sales items, but the item modifier inside the sales item is not being filtered.

Chris Over a year ago

Just checking - you want to filter out any sales item that is itself deleted, or has a true isDeleted modifier?

Alvin Over a year ago

Basically I need to check SalesItems those are not deleted. After filtered the SalesItems those are not deleted, check the modifier inside and only display those are not deleted as well.

Chris Over a year ago

I have made a small change - please try it. It should both out at once.

Alvin Over a year ago

Sir, i have updated the question for better clarity. Thanks

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