CODEWITHSUNDEEP
iosswift
WYS
WYS

Reputation: 1647

Filtering of elements

I have a problem filtering my array of elements, let's say.

Box
 -[Zombies]
 -[Players]
 -[Weapons]

I have a bunch of boxes which can contain all of the arrays listed above.

[Box]

Now I want to filter out the boxes that have whatever I want to filter out. If I choose a specific zombieId + playerId, I will only get the boxes with those etc.

I tried using something like:

let filteredBoxes = boxes.filter { (box) -> Bool in

selectedZombies.contains(where: { $0.zombieId == box.zombies.zombieId }) 
&&
selectedPlayers.contains(where: { $0.playerId == box.players.playerId }) 
&&
selectedWeapons.contains(where: { $0.weaponId == box.weapons.weaponId })
    }

This works, but requires the user to select all 3 filters before anything is shown.

I also want to show the boxes that matches the users selection even if they only select some filters for i.e. selected zombies.

Upvotes: 0

Views: 69

Answers (1)

Nirav D
Nirav D

Reputation: 72440

If you want to filter the specific condition you can make it like this, declare 3 instance property of type Bool to control which filter user currently allow and use it with filter.

var filterZombie = true
var filterPlayer = true
var filterWeapon = false
//So now filterZombie and filterPlayer is true you want to filter only these two condition so make filter like this
let filterArray = boxes.filter { (box) -> Bool in
    let zombieResult = filterZombie ? selectedZombies.contains(where: { $0.zombieId == box.zombies.zombieId }) : true //Set default result as true 
    let playerResult = filterPlayer ? selectedPlayers.contains(where: { $0.playerId == box.players.playerId }) : true //Set default result as true 
    let weaponResult = filterWeapon ? selectedWeapons.contains(where: { $0.weaponId == box.weapons.weaponId }) : true //Set default result as true 
    return zombieResult && playerResult && weaponResult
}

Upvotes: 2

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