In Swift can I use a tuple as the key in a dictionary?

Question

I\'m wondering if I can somehow use an x, y pair as the key to my dictionary

let activeSquares = Dictionary <(x: Int, y: Int), SKShapeNode>()
         


        

Answer 1

No need special code or magic numbers to implement Hashable

Hashable in Swift 4.2:

struct PairKey: Hashable {

    let first: UInt
    let second: UInt

    func hash(into hasher: inout Hasher) {
        hasher.combine(self.first)
        hasher.combine(self.second)
    }

    static func ==(lhs: PairKey, rhs: PairKey) -> Bool {
        return lhs.first == rhs.first && lhs.second == rhs.second
    }
}

More info: https://nshipster.com/hashable/