Implementing a hash combiner in Swift

Question

I\'m extending a struct conform to Hashable. I\'ll use the DJB2 hash combiner to accomplish this.

To make it easy to write hash function f

Answer 1

Use the method hash(into:) from the Apple Developer Documentation:

https://developer.apple.com/documentation/swift/hashable

struct GridPoint {
    var x: Int
    var y: Int
}

extension GridPoint: Hashable {

    static func == (lhs: GridPoint, rhs: GridPoint) -> Bool {
        return lhs.x == rhs.x && lhs.y == rhs.y
    }

    func hash(into hasher: inout Hasher) {
        hasher.combine(x)
        hasher.combine(y)
    }

}